• The InnoDB, NDB, BDB, and ARCHIVE storage engines now support spatial columns. See Chapter 17, Spatial Extensions in MySQL.

• You must now declare a prefix for an index on any column of any Geometry class, the only exception being when the column is a POINT. (Bug #12267)

• Added a --hexdump option to mysqlbinlog that displays a hex dump of the log in comments. This output can be helpful for replication debugging.

• MySQL 5.0 now supports character set conversion for seven additional cp950 characters into the big5 character set: 0xF9D6, 0xF9D7, 0xF9D8, 0xF9D9, 0xF9DA, 0xF9DB, and 0xF9DC. Note: If you move data containing these additional characters to an older MySQL installation which does not support them, you may encounter errors. (Bug #12476)

• mysqld_safe did not correctly start the -max version of the server (if it was present) if the --ledir option was given. (Bug #13774)

• The mysql parser did not properly strip the delimiter from input lines less than nine characters long. For example, this could cause USE abc; to result in an Unknown database: abc; error. (Bug #14358)

• Statements of the form CREATE TABLE … SELECT … that created a column with a multi-byte character set could incorrectly calculate the maximum length of the column, resulting in a Specified key was too long error. (Bug #14139)

• Some updatable views could not be updated. (Bug #14027)

• Running OPTIMIZE TABLE and other data-updating statements concurrently on an InnoDB table could cause a crash or the following warnings in the error log: Warning: Found locks from different threads in write: enter write_lock, Warning: Found locks from different threads in write: start of release lock. (Bug #11704)

• Indexes for BDB tables were being limited incorrectly to 255 bytes. (Bug #14381)

• Use of col_name = VALUES(col_name) in the ON DUPLICATE KEY UPDATE clause of an INSERT statement failed with an Column 'col_name' in field list is ambiguous error. (Bug #13392)

• On Windows, the server was not ignoring hidden or system directories that Windows may have created in the data directory, and would treat them as available databases. (Bug #4375)

• mysqldump could not dump views if the -x option was given. (Bug #12838)

• mysqlimport now issues a SET @@character_set_database = binary statement before loading data so that a file containing mixed character sets (columns with different character sets) can be loaded properly. (Bug #12123)

• Use of the deprecated --sql-bin-update-same option caused a server crash. (Bug #12974)

• Maximum values were handled incorrectly for command-line options of type GET_LL. (Bug #12925)

• For a user that has the SELECT privilege on a view, the server erroneously was also requiring the user to have the EXECUTE privilege at view execution time for stored functions used in the view definition. (Bug #9505)

• Use of WITH ROLLUP PROCEDURE ANALYSE() could hang the server. (Bug #14138)

• TIMEDIFF(), ADDTIME(), and STR_TO_DATE() were not reporting that they could return NULL, so functions that invoked them might misinterpret their results. (Bug #14009)

• The example configuration files supplied with MySQL distributions listed the thread_cache_size variable as thread_cache. (Bug #13811)

• Using ALTER TABLE to add an index could fail if the operation ran out of temporary file space. Now it automatically makes a second attempt that uses a slower method but no temporary file. In this case, problems that occurred during the first attempt can be displayed with SHOW WARNINGS. (Bug #12166)

• The input polling loop for Instance Manager did not sleep properly. Instance Manager used up too much CPU as a result. (Bug #14388)

• Trying to take the logarithm of a negative value is now handled in the same fashion as division by zero. That is, it produces a warning when ERROR_FOR_DIVISION_BY_ZERO is set, and an error in strict mode. (Bug #13820)

• LOAD DATA INFILE would not accept the same character for both the ESCAPED BY and the ENCLOSED BY clauses. (Bug #11203)

• The value of Last_query_cost was not updated for queries served from the query cache. (Bug #10303)

• TIMESTAMPDIFF() returned an incorrect result if one argument but not the other was a leap year and a date was from March or later. (Bug #13534)

• The server incorrectly accepted column definitions of the form DECIMAL(0,D) for D less than 11. (Bug #13667)

• The displayed value for the CHARACTER_MAXIMUM_LENGTH column in the INFORMATION_SCHEMA.COLUMNS table was not adjusted for multi-byte character sets. (Bug #14290)

• A bugfix in MySQL 5.0.15 caused the displayed values for the CHARACTER_MAXIMUM_LENGTH and CHARACTER_OCTET_LENGTH columns in the INFORMATION_SCHEMA.COLUMNS table to be reversed. (Bug #14207)

• On Windows, the value of character_sets_dir in SHOW VARIABLES output was displayed inconsistenly (using both ‘/’ and ‘\’ as pathname component separators). (Bug #14137)

• Subqueries in the FROM clause failed if the current database was INFORMATION_SCHEMA. (Bug #14089)

• Corrected a parser precedence problem that resulted in an Unknown column … in 'on clause' error for some joins. (Bug #13832)

• For LIKE … ESCAPE, an escape sequence longer than one character was accepted as valid. Now the sequence must be empty or one character long. If the NO_BACKSLASH_ESCAPES SQL mode is enabled, the sequence must be one character long. (Bug #12595)

• SELECT DISTINCT CHAR(col_name) returned incorrect results after SET NAMES utf8. (Bug #13233)

• A prepared statement failed with Illegal mix of collations if the client character set was utf8 and the statement used a table that had a character set of latin1. (Bug #12371)

• Inserting a new row into an InnoDB table could cause DATETIME values already stored in the table to change. (Bug #13900)

• The default value of query_prealloc_size was set to 8192, lower than its minimum of 16384. The minimum has been lowered to 8192. (Bug #13334)

• The server did not take character set into account in checking the width of the mysql.user.Password column. As a result, it could incorrectly generate long password hashes even if the column was not long enough to hold them. (Bug #13064)

• Inserting cp932 strings into a VARCHAR column caused a server crash rather than string truncation if the string was longer than the column definition. (Bug #12547)

• Two threads that were creating triggers on an InnoDB table at the same time could deadlock. (Bug #12739)

• mysqladmin and mysqldump would hang on SCO OpenServer. (Bug #13238)

• RESET MASTER failed to delete log files on Windows. (Bug #13377)

• Where one stored procedure called another stored procedure: If the second stored procedure generated an exception, the exception was not caught by the calling stored procedure. For example, if stored procedure A used an EXIT statement to handle an exception, subsequent statements in A would be executed regardless when A was called by another stored procedure B, even if an exception that should have been handled by the EXIT was generated in A. (Bug #7049)

• Trying to create a stored routine with no database selected would crash the server. (Bug #13514, Bug #13587)

• Specifying --default-character-set=cp-932 for mysqld would cause SQL scripts containing comments written using that character set to fail with a syntax error. (Bug #13487)

• Trying to compile the server using the --without-geometry option caused the build to fail. (Bug #12991)

• Warning: Incompatible change. For BINARY columns, the pad value and how it is handled has changed. The pad value for inserts now is 0x00 rather than space, and there is no stripping of the pad value for selects. For details, see Section 11.4.2, “The BINARY and VARBINARY Types”.

• Warning: Incompatible change. The CHAR() function now returns a binary string rather than a string in the connection character set. An optional USING charset clause may be used to produce a result in a specific character set instead. Also, arguments larger than 256 produce multiple characters. They are no longer interpreted modulo 256 to produce a single character each. These changes may cause some incompatibilities, as noted in Section 2.10.2, “Upgrading from Version 4.1 to 5.0”.

• NDBCluster: The perror utility included with the MySQL-Server RPM now provides support for the --ndb option, and so can be used to obtain error message text for MySQL Cluster error codes. (Bug #13740)

• When executing single-table UPDATE or DELETE queries containing an ORDER BY ... LIMIT N clause, but not having any WHERE clause, MySQL can now take advantage of an index to read the first N rows in the ordering specified in the query. If an index is used, only the first N records will be read, as opposed to scanning the entire table. (Bug #12915)

• The MySQL-server RPM now explicitly assigns the mysql system user to the mysql user group during the postinstallation process. This corrects an issue with upgrading the server on some Linux distributions whereby a previously existing mysql user was not changed to the mysql group, resulting in wrong groups for files created following the installation. (Bug #12823)

• Added the --tz-utc option to mysqldump. This option adds SET TIME_ZONE='+00:00' to the dump file so that TIMESTAMP columns can be dumped and reloaded between servers in different time zones and protected from changes due to daylight saving time. (Bug #13052)

• When declaring a local variable (or parameter) named password or name, and setting it with SET, e.g. SET password = '', the new error message: ERROR 42000: Variable 'nnn' must be quoted with `...`, or renamed is returned (where 'nnn' is 'password' or 'names'). This means there is a syntax conflict with special sentences like SET PASSWORD = PASSWORD(...) (for setting a user's password) and set names default (for setting charset and collation).

  This must be resolved either by quoting the variable name: SET `password` = ..., which will set the local variable `password`, or by renaming the variable to something else (if setting the user's password is the desired effect).

• The following statements now cause an implicit COMMIT:

  • CREATE VIEW

  • ALTER VIEW

  • DROP VIEW

  • CREATE TRIGGER

  • DROP TRIGGER

  • CREATE USER

  • RENAME USER

  • DROP USER

• NDBCluster: A number of new or improved error messages have been implemented in this release in order to provide better and more accurate diagnostic information regarding cluster configuration issues and problems. (Bug #11739, Bug #11749, Bug #12044, Bug #12786, Bug #13197)

• NDBCluster: A new “smart” node allocation algorithm means that it is no longer necessary to use sequential IDs for cluster nodes, and that nodes not explicitly assigned IDs should now have IDs allocated automatically in most cases. In practical terms, this means that it is now possible to assign a set of node IDs such as 1, 2, 4, 5 without an error being generated due to the missing 3. (Bug #13009)

• An expression in an ORDER BY clause failed with Unknown column 'col_name' in 'order clause' if the expression referred to a column alias. (Bug #11694)

• mysqldump could not dump views. (Bug #14061)

• Using an undefined variable in an IF or SET clause inside a stored routine produced an incorrect unknown column ... in 'order clause' error message. (Bug #13037)

• Trying to create a view dynamically using a prepared statement within a stored procedure failed with error 1295. (Bug #13095)

• mysqldump --triggers did not quote identifiers properly if the --compatible option was given, so the dump output could not be reloaded. (Bug #13146)

• Character set conversion was not being done for FIND_IN_SET(). (Bug #13751)

• CAST(1E+300 TO SIGNED INT) produced an incorrect result on little-endian machines. (Bug #13344)

• Corrected a memory-copying problem for big5 values when using icc compiler on Linux IA-64 systems. (Bug #10836)

• On BSD systems, the system crypt() call could return an error for some salt values. The error was not handled, resulting in a server crash. (Bug #13619)

• Character set file parsing during mysql_real_connect() read past the end of a memory buffer. (Bug #6413)

• InnoDB: Queries that were executed using an index_merge union or intersection could produce incorrect results if the underlying table used the InnoDB storage engine and had a primary key containing VARCHAR members. (Bug #13484)

• CREATE DEFINER=... VIEW ... caused the server to crash when run with --skip-grant-tables. (Bug #13504)

• The --interactive-timeout and --slave-net-timeout options for mysqld were not being obeyed on Mac OS X and other BSD-based platforms. (Bug #8731)

• Queries of the form (SELECT ...) ORDER BY ... were being treated as a UNION. This improperly resulted in only distinct values being returned (because UNION by default eliminates duplicate results). Also, references to column aliases in ORDER BY clauses following parenthesized SELECT statements were not resolved properly. (Bug #7672)

• If special characters such as '_' , '%', or the escape character were included within the prefix of a column index, LIKE pattern matching on the indexed column did not return the correct result. (Bug #13046, Bug #13919)

• An UPDATE query using a join would be executed incorrectly on a replication slave. (Bug #12618)

• Server crashed during a SELECT statement, writing a message like this to the error log:

  InnoDB: Error: MySQL is trying to perform a SELECT
  InnoDB: but it has not locked any tables in ::external_lock()!
  

  (Bug #12736)

• NDBCluster: ndb_mgmd would allow a node to be stopped or restarted while another node was still starting up, which could crash the cluster. It should now not be possible to issue a node stop or restart while a different node is still restarting, and the cluster management client issues an error if an attempt is made to do so. (Bug #13461)

• NDBCluster: Placing multiple [TCP DEFAULT] sections in the cluster config.ini file crashed ndb_mgmd. (The ndb_mgmd process now exits gracefully with an appropriate error message instead.) (Bug #13611)

• NDBCluster: Trying to run ndbd as system root when connecting to a mysqld process running as the mysql system user via SHM caused the ndbd process to crash. (ndbd should now exit gracefully with an appropriate error message instead.) (Bug #9249)

• Server may over-allocate memory when performing a FULLTEXT search for stopwords only. (Bug #13582)

• Queries that use indexes in normal SELECT statements may cause range scans in VIEWs. (Bug #13327)

• When calling a stored procedure with the syntax CALL schema.procedurename and no default schema selected, ERROR 1046 was displayed after the procedure returned. (Bug #13616)

• With --log-slave-updates Exec_master_log_pos of SQL thread lagged IO (Bug #13023)

• SHOW CREATE TABLE did not display any FOREIGN KEY clauses if a temporary file could not be created. Now SHOW CREATE TABLE displays an error message in an SQL comment if this occurs. (Bug #13002)

• A column in the ON condition of a join that referenced a table in a nested join could not be resolved if the nested join was a right join. (Bug #13597)

• A qualified reference to a view column in the HAVING clause could not be resolved. (Bug #13410)

• comp_err did not detect when multiple error messages for a language were given for an error symbol. (Bug #13071)

• For XA transaction IDs (gtrid.bqual.formatID), uniqueness is supposed to be assessed based on gtrid and bqual. MySQL was also including formatID in the uniqueness check. (Bug #13143)

• Local (non-XA) and XA transactions are supposed to be mutually exclusive within a given client connection, but this prohibition was not always enforced. (Bug #12935)

• mysqlcheck --all-databases --analyze --optimize failed because it also tried to analyze and optimize the INFORMATION_SCHEMA tables which it can't. (Bug #13783)

• SELECT * INTO OUTFILE ... FROM INFORMATION_SCHEMA.schemata failed with an Access denied error. (Bug #13202)

• A table or view named Ç (C-cedilla) couldn't be dropped. (Bug #13145)

• Tests containing SHOW TABLE STATUS or INFORMATION_SCHEMA failed on opnsrv6c. (Bug, #14064, Bug #14065)

The limit of 255 characters on the input buffer for mysql on Windows has been lifted. The exact limit depends on what the system allows, but can be up to 64K characters. A typical limit is 16K characters. (Bug #12929)

Re-enabled the --delayed-inserts option for mysqldump, which now checks for each table dumped whether its storage engine supports DELAYED inserts. (Bug #7815)

Added the myisam_stats_method, which controls whether NULL values in indexes are considered the same or different when collecting statistics for MyISAM tables. This influences the query optimizer as described in Section 7.4.7, “MyISAM Index Statistics Collection”. (Bug #12232)

• When an InnoDB foreign key constraint is violated, the error message now indicates which table, column, and constraint names are involved. (Bug #3443)

• Configure-time checking for the availability of multi-byte macros and functions in the bundled readline library. This improves handling of multi-byte character sets in the mysql client. (Bug #3982)

• The CHAR() function now takes into account the character set and collation given by the character_set_connection and collation_connection system variables. For an argument n to CHAR(), the result is n mod 256 for single-byte character sets. For multi-byte character sets, n must be a valid code point in the character set. Also, the result string from CHAR() is checked for well-formedness. For invalid arguments, or a result that is not well-formed, MySQL generates a warning (or, in strict SQL mode, an error). (Bug #10504)

• RENAME TABLE now works for views as well, as long as you do not try to rename a view into a different database. (Bug #5508)

• Multi-table UPDATE and DELETE statements that do not affect any rows are now written to the binary log and will replicate. (Bug #13348, Bug #12844)

• Range scans can now be performed for queries on VIEWs such as column IN (<constants>) and column BETWEEN ConstantA AND ConstantB. (Bug #13317)

• NDBCluster: A trigger updating the value of an AUTO_INCREMENT column in a Cluster table would insert an error code rather than the expected value into the column. (Bug #13961)

• NDBCluster: When performing a delete of a great many (tens of thousands of) rows at once from a Cluster table, an improperly dereferenced pointer could cause the mysqld process to crash. (Bug #9282)

• CHECKSUM TABLE locked InnoDB tables and did not use a consistent read. (Bug #12669)

• The --skip-innodb-doublewrite option disables use of the InnoDB doublewrite buffer. However, having this option in effect when creating a new MySQL installation prevented the buffer from even being created, resulting in a server crash later. (Bug #13367)

• MySQL programs in binary distributions for Solaris 8/9/10 x86 systems would not run on Pentium III machines. (Bug #6772)

• When SELECT ... FOR UPDATE or SELECT ... LOCK IN SHARE MODE for an InnoDB table were executed from within a stored function or a trigger, they were converted to a non-locking consistent read. (Bug #11238)

• NDB Cluster: If ndb_restore could not find a free mysqld process, it crashed. (Bug #13512)

• NDB Cluster: Receipt of several enter single user mode commands by multiple ndb_mgmd processes within a short period of time resulted in cluster shutdown. (Bug #13053)

• NDB Cluster: Multiple ndb_mgmd processes in a cluster would not know each other's IP addresses. (Bug #12037)

• NDB Cluster: With two mgmd processes in a cluster, ndb_mgmd output for SHOW would display the same IP address for both processes, even when they were on different hosts. (Bug #11595)

• NDB Cluster: Queries on NDB tables that are executed using index_merge/union or index_merge/intersection could produce incorrect results. (Bug #13081)

• The --replicate-rewrite-db and --replicate-do-table options did not work for statements in which tables were aliased to names other than those listed by the options. (Bug #11139)

• After running configure with the --with-embedded-privilege-control option, the embedded server failed to build. (Bug #13501)

• Nested handlers within stored procedures didn't work. (Bug #6127)

• The optimizer chose a less efficient execution plan for col_name BETWEEN const AND const than for col_name = const, even though the two expressions are logically equivalent. Now the optimizer can use the ref access method for both expressions. (Bug #13455)

• Incorrect creation of DECIMAL local variables in a stored procedure could cause a server crash. (Bug #12589)

• Queries against a MERGE table that has a composite index could produce incorrect results. (Bug #9112)

• The server was not rejecting FLOAT(M,D) or DOUBLE(M,D) columns specifications when M was less than D. (Bug #12694)

• After running configure with the --without-server option, the distribution failed to build. (Bug #11680, Bug #13550)

• Joins nested under NATURAL or USING joins were sometimes not initialized properly, causing a server crash. (Bug #13545)

• Locking a view with the query cache enabled and query_cache_wlock_invalidate enabled could cause a server crash. (Bug #13424)

• A HAVING clause that references an unqualified view column name could crash the server. (Bug #13411)

• Comparisons involving row constructors containing constants could cause a server crash. (Bug #13356)

• NDB Cluster: LOAD DATA INFILE with a large data file failed. (Bug #10694)

• NDB Cluster: Adding an index to a table with a large number of columns (more then 100) crashed the storage node. (Bug #13316)

• Calling the FORMAT() function with a DECIMAL column value caused a server crash when the value was NULL. (Bug #13361)

• Aggregate functions sometimes incorrectly were allowed in the WHERE clause of UPDATE and DELETE statements. (Bug #13180)

• It was possible to create a view that executed a stored function for which you did not have the EXECUTE privilege. (Bug #12812)

• BIT columns and following columns in NDB tables were corrupt when dumped by mysqldump. (Bug #13152)

• NATURAL joins and joins with USING against a view could return NULL rather than the correct value. (Bug #13127)

• Use of a user-defined function within the HAVING clause of a query resulted in an Unknown column error. (Bug #11553)

• For queries for which the optimizer determined a join type of “Range checked for each record” (as shown by EXPLAIN, the query sometimes could cause a server crash, depending on the data distribution. (Bug #12291)

• For queries with DISTINCT and WITH ROLLUP, the DISTINCT should be applied after the rollup operation, but was not always. (Bug #12887)

• The server crashed when processing a view that invoked the CONVERT_TZ() function. (Bug #11416)

• Shared-memory connections were not working on Windows. (Bug #12723)

• Added a --routines option for mysqldump that enables dumping of stored routines. (Bug #9056)

• The connection string for FEDERATED tables now is specified using a CONNECTION table option rather than a COMMENT table option.

• Better detection of connection timeout for replication servers on Windows allows elimination of extraneous Lost connection errors in the error log. (Bug #5588)

• The counters for the Key_read_requests, Key_reads, Key_write_requests, and Key_writes status variables were changed from unsigned long to unsigned longlong to accommodate larger variables without rollover. (Bug #12920)

• The restriction on the use of PREPARE, EXECUTE, and DEALLOCATE PREPARE within stored procedures was lifted. The restriction still applies to stored functions and triggers. (Bug #10975, Bug #7115, Bug #10605)

• A new command line argument was added to mysqld to ignore client character set information sent during handshake, and use server side settings instead, to reproduce 4.0 behaviour (Bug #9948):

  mysqld --skip-character-set-client-handshake

• OPTIMIZE TABLE and HANDLER now are prohibited in stored procedures and functions and in triggers. (Bug #12953, Bug #12995)

• InnoDB: The TRUNCATE TABLE statement for InnoDB tables always resets the counter for an AUTO_INCREMENT column now, regardless of whether there is a foreign key constraint on the table. (Beginning with 5.0.3, TRUNCATE TABLE reset the counter, but only if there was no such constraint.) (Bug #11946)

• The LEAST() and GREATEST() functions used to return NULL only if all arguments were NULL. Now they return NULL if any argument is NULL, the same as Oracle. (Bug #12791)

• Two new collations have been added for Esperanto: utf8_esperanto_ci and ucs2_esperanto_ci.

• Reorder network startup to come after all other initialization, particularly storage engine startup which can take a long time. This also prevents MySQL from being run on a privileged port (any port under 1024) unless run as the root user. (Bug #11707)

• The Windows binary packages are now compiled with the Microsoft Visual Studio 2003 compiler instead of Microsoft Visual C++ 6.0.

• The binaries compiled with the Intel icc compiler are now built using icc 9.0 instead of icc 8.1. You will have to install new versions of the Intel icc runtime libraries, which are available from here: ( http://dev.mysql.com/downloads/os-linux.html)

• Incompatible change: A lock wait timeout caused InnoDB to roll back the entire current transaction. Now it rolls back only the most recent SQL statement. (Bug #12308)

• mysqldump did not dump triggers properly. (Bug #12597)

• NDBCluster: The average row size for Cluster tables was being calcualted incorrectly. This affected the values shown for the Data_length and Avg_row_length columns in the output generated by SHOW TABLE STATUS as well as the values for the data_length and data_length/table_rows columns shown in the TABLES table of the INFORMATION_SCHEMA database with respect to Cluster tables (tables using other storage engines were not affected by this bug). (Bug #9896)

• Within a stored procedure, fetching a large number of rows in a loop using a cursor could result in a server crash or an out of memory error. Also, values inserted within a stored procedure using a cursor were interpreted as latin1 even if character set variables had been set to a different character set. (Bug #6513, Bug #9819)

• For a server compiled with yaSSL, clients that used MySQL Connector/J were not able to establish SSH connections. (Bug #13029)

• When used in view definitions, DAYNAME(expr), DAYOFWEEK(expr), WEEKDAY(expr) were incorrectly treated as though the expression was TO_DAYS(expr) or TO_DAYS(TO_DAYS(expr)). (Bug #13000)

• Incorrect implicit nesting of joins caused the parser to fail on queries of the form SELECT ... FROM t1 JOIN t2 JOIN t3 ON t1.t1col = t3.t3col with an Unknown column 't1.t1col' in 'on clause' error. (Bug #12943)

• NDB: A cluster shutdown following the crash of a data node would fail to terminate the remaining node processes, even though ndb_mgm showed the shutdown request as having been completed. (Bug #10938, Bug #9996, Bug #11623)

• A column that can be NULL was not handled properly for WITH ROLLUP in a subquery or view. (Bug #12885)

• Within a transaction, the following statements now cause an implicit commit: CREATE FUNCTION, DROP FUNCTION, DROP PROCEDURE, ALTER FUNCTION, ALTER PROCEDURE, CREATE PROCEDURE. This corrects a problem where these statements followed by ROLLBACK might not be replicated properly. (Bug #12870)

• Simultaneous execution of DML statements and CREATE TRIGGER or DROP TRIGGER statements on the same table could cause server crashes or errors. (Bug #12704)

• If a stored function invoked from a SELECT failed with an error, it could cause the client connection to be dropped. Now such errors generate warnings instead so as not to interrupt the SELECT. (Bug #12379)

• A concurrency problem for CREATE ... SELECT could cause a server crash. (Bug #12845)

• The server incorrectly generated an Unknown table error message when for attempts to drop tables in the INFORMATION_SCHEMA database. Now it issues an Access denied message. (Bug #9846)

• The server allowed privileges to be granted explicitly for the INFORMATION_SCHEMA database. Such privileges are always implicit and should not be grantable. (Bug #10734)

• The server allowed TEMPORARY tables and stored procedures to be created in the INFORMATION_SCHEMA database. (Bug #9683, Bug #10708)

• The server failed to disallow SET AUTOCOMMIT in stored functions and triggers. It is allowed to change the value of AUTOCOMMIT in stored procedures, but a runtime error might occur if the procedure is invoked from a stored function or trigger. (Bug #12712)

• Using an INOUT parameter with a DECIMAL data type in a stored procedure caused a server crash. (Bug #12979)

• Performing an IS NULL check on the MIN() or MAX() of an indexed column in a complex query could produce incorrect results. (Bug #12695)

• The mysql.server script contained incorrect path for the libexec directory. (Bug #12550)

• The NDB START BACKUP command could be interrupted by a SHOW command. (Bug #13054)

• The LIKE ... ESCAPE syntax produced invalid results when escape character was larger than one byte. (Bug #12611)

• A client connection thread cleanup problem caused the server to crash when closing the connection if the binary log was enabled. (Bug #12517)

• Using AS to rename a column selected from a view in a subquery made it not possible to refer to that column in the outer query. (Bug #12993)

• The character_set_system system variable could not be selected with SELECT @@character_set_system. (Bug #11775)

• A view-creation statement of the form CREATE VIEW name AS SELECT ... FROM tbl_name AS name failed with a Not unique table/alias: 'name' error. (Bug #6808)

• UNION [DISTINCT] was not removing all duplicates for multi-byte character values. (Bug #12891)

• Multiplying a DECIMAL value within a loop in a stored routine could incorrectly result in a value of NULL. (Bug #12938)

• mysql and mysqldump were ignoring the --defaults-extra-file option. (Bug #12917)

• Columns named in the USING() clause of JOIN ... USING() were incorrectly resolved in case-sensitive fashion. (Bug #13067)

• Local variables in stored routines were not always initialized correctly. (Bug #13133)

• SHOW FIELDS FROM schemaname.viewname caused error 1046 when no default schema was set. (Bug #12905)

• The value of character_set_results could be set to NULL, but returned the string "NULL" when retrieved. (Bug #12363)

• InnoDB: Limit recursion depth to 200 in deadlock detection to avoid running out of stack space. (Bug #12588)

• GROUP_CONCAT() ignored an empty string if it was the first value to occur in the result. (Bug #12863)

• Outer join elimination was erroneously applied for some queries that used a NOT BETWEEN condition, an IN(value_list) condition, or an IF() condition. (Bug #12101, Bug #12102)

• SHOW FIELDS truncated the TYPE column to 40 characters. (Bug #7142)

• Use of PREPARE and EXECUTE with a statement that selected from a view in a subquery could cause a server crash. (Bug #12651)

• On HP-UX 11.x (PA-RISC), the -L option caused mysqlimport to crash. (Bug #12958)

• If the binary log is enabled, execution of a stored procedure that modifies table data and uses user variables could cause a server crash or incorrect information to be written to the binary log. (Bug #12637)

• Queries with subqueries, where the inner subquery uses the range or index_merge access method, could return incorrect results. (Bug #12720)

• After changing the character set with SET CHARACTER SET, the result of the GROUP_CONCAT() function was not converted to the proper character set. (Bug #12829)

• A bug introduced in MySQL 5.0.12 caused SHOW TABLE STATUS to display an Auto_increment value of 0 for InnoDB tables. (Bug #12973)

• Foreign keys were not properly enforced in TEMPORARY tables. Foreign keys now are disallowed in TEMPORARY tables. (Bug #12084)

• Replication of LOAD DATA INFILE failed between systems that use different pathname syntax (such as delimiter characters). (Bug #11815)

• Within a stored procedure, a server crash was caused by assigning to a VARCHAR INOUT parameter the value of an expression that included the variable itself. (For example, SET c = c.) (Bug #12849)

• SELECT ... JOIN ... ON ... JOIN ... USING caused a server crash. (Bug #12977)

• Using GROUP BY when selecting from a view in some cases could cause incorrect results to be returned. (Bug #12922)

• myisampack did not properly pack BLOB values larger than 2²⁴ bytes. (Bug #4214)

• Incorrect results could be returned from a view processed using a temporary table. (Bug #12941)

• The server crashed when one thread resized the query cache while another thread was using it. (Bug #12848)

• mysqld_multi now quotes arguments on command lines that it constructs to avoid problems with arguments that contain shell metacharacters. (Bug #11280)

• InnoDB: A consistent read could return inconsistent results due to a bug introduced in MySQL 5.0.5. (Bug #12947)

• Deadlock occurred when several account management statements were run (particularly between FLUSH PRIVILEGES/SET PASSWORD and GRANT/REVOKE statements). (Bug #12423)

• The Windows installer made a change to one of the mysql.proc table files, causing stored routine functionality to be compromised. The Windows installer now never overwrites files in the MySQL data directory. During an upgrade from one version to another, a file in the data directory will not be overwritten even if it has not been modified since it was put there by an older installer.

  If you have already lost access to stored routines because of this problem, you can get them back using the following procedure:

  • Stop the server.

  • In the mysql\data directory under your MySQL installation directory, and replace the proc.frm file with corresponding file from the version of MySQL that you were using before you upgraded.

  • Start the server

  • Start the mysql command-line client (use the root account or another account that has full database privileges) and execute the mysql_fix_privilege_tables.sql script that upgrades the grant tables to the current structure. Instructions for doing this are given in Section 2.10.3, “Upgrading the Grant Tables”.

  After this, all stored routine functionality should work. (Bug #12820)

• On Windows, the server was preventing tables from being created if the table name was a prefix of a forbidden name. For example, nul is a forbidden name because it's the same as a Windows device name, but a table with the name of n or nu was being forbidden as well. (Bug #12325)

• InnoDB was too permissive with LOCK TABLE ... READ LOCAL and alowed new inserts into the table. Now READ LOCAL is equivalent to READ for InnoDB. This will cause slightly more locking in mysqldump, but makes InnoDB table dumps consistent with MyISAM table dumps. (Bug #12410)

• Use of the mysql client HELP command from within a stored routine caused a “packets out of order” error and a lost connection. Now HELP is detected and disallowed within stored routines. (Bug #12490)

• Use of yaSSL for a secure client connection caused LOAD DATA LOCAL INFILE to fail. (Bug #11286)

• SHOW CREATE PROCEDURE and SHOW CREATE FUNCTION no longer qualify the routine name with the database name, for consistency with the behavior of SHOW CREATE TABLE. (Bug #10362)

• A UNION of long utf8 VARCHAR columns was sometimes returned as a column with a LONGTEXT data type rather than VARCHAR. This could prevent such queries from working at all if selected into a MEMORY table because the MEMORY storage engine does not support the TEXT data types. (Bug #12537)

• If a client has opened an InnoDB table for which the .ibd file is missing, InnoDB would not honor a DROP TABLE statement for the table. (Bug #12852)

• ALTER TABLE ... DISCARD TABLESPACE for non-InnoDB table caused the client to lose the connection. (The server was not returning the error properly.) (Bug #12207)

• DO IFNULL(NULL, NULL) and SELECT CAST(IFNULL(NULL, NULL) AS DECIMAL) caused a server crash. (Bug #12841)

• When using a cursor, a SELECT statement that uses a GROUP BY clause could return incorrect results. (Bug #11904)

• The SYSDATE() function now returns the time at which it was invoked. In particular, within a stored routine or trigger, SYSDATE() returns the time at which it executes, not the time at which the stored routine or triggering statement began to execute. (Bug #12480)

• CREATE VIEW inside a stored procedure caused a server crash if the table underlying the view had been deleted. (Bug #12468)

• A memory leak resulting from repeated SELECT ... INTO statements inside a stored procedure could cause the server to crash. (Bug #11333)

• Incompatible change: Beginning with MySQL 5.0.12, natural joins and joins with USING, including outer join variants, are processed according to the SQL:2003 standard. The changes include elimination of redundant output columns for NATURAL joins and joins specified with a USING clause and proper ordering of output columns. (Bug #6136, Bug #6276, Bug #6489, Bug #6495, Bug #6558, Bug #9067, Bug #9978, Bug #10428, Bug #10646, Bug #10972.) The precedence of the comma operator also now is lower compared to JOIN. (Bug #4789, Bug #12065, Bug #13551.)

  These changes make MySQL more compliant with standard SQL. However, they can result in different output columns for some joins. Also, some queries that appeared to work correctly prior to 5.0.12 must be rewritten to comply with the standard. For details about the scope of the changes and examples that show what query rewrites are necessary, see Section 13.2.7.1, “JOIN Syntax”.

• SHOW TABLE STATUS for a view now shows VIEW in uppercase, consistent with SHOW TABLES and INFORMATION_SCHEMA. (Bug #5501)

• An optimizer estimate of zero rows for a non-empty InnoDB table used in a left or right join could cause incomplete rollback for the table. (Bug #12779)

• Calls to stored procedures were written to the binary log even within transactions that were rolled back, causing them to be executed on replication slaves. (Bug #12334)

• Interleaved execution of stored procedures and functions could be written to the binary log incorrectly, causing replication slaves to get out of sync. (Bug #12335)

• A query of the form SHOW TABLE STATUS FROM db_name WHERE name IN (select_query) would crash the server. (Bug #12636)

• Users created using an IP address or other alias rather than a hostname listed in /etc/hosts could not set their own passwords. (Bug #12302)

• Using DESCRIBE on a view after renaming a column in one of the view's base tables caused the server to crash. (Bug #12533)

• Recursive triggers are detected and disallowed. (Bug #11896, Bug #12644)

• SHOW OPEN TABLES now supports FROM and LIKE clauses. (Bug #12183)

• SHOW TABLE STATUS FROM INFORMATION_SCHEMA now sorts output by table name the same as it does for other databases. (Bug #12315)

• SHOW ENGINE INNODB STATUS now can display longer query strings. (Bug #7819)

• Added the SLEEP() function, which pauses for the number of seconds given by its argument. (Bug #6760)

• Trying to drop the default keycache by setting @@global.key_buffer_size to zero now returns a warning that the default keycache cannot be dropped. (Bug #10473)

• The stability of cursors when used with InnoDB tables was greatly improved. (Bug #11832, Bug #12243, Bug #11309)

• It is no longer possible to issue FLUSH commands from within stored functions or triggers. See Section I.1, “Restrictions on Stored Routines and Triggers” for details. (Bug #12280, Bug #12307)

• INFORMATION_SCHEMA objects are now reported as a SYSTEM VIEW table type. (Bug #11711)

• CHECKSUM TABLE command returned incorrect results for tables with deleted rows. After upgrading, users who used stored checksum information to detect table changes should rebuild their checksum data. (Bug #12296)

• A data type of CHAR BINARY was not recognized as valid for stored routine parameters. (Bug #9048)

• SET GLOBAL TRANSACTION ISOLATION LEVEL was not working. (Bug #11207)

• NDB Cluster: Corrected the parsing of the CLUSTERLOG command by ndb_mgm to allow multiple items. (Bug #12833)

• NDB Cluster: Improved error messages related to filesystem issues. (Bug #11218)

• NDB Cluster: When a schema was detected to be corrupt, ndb neglected to close it, resulting in a “file already open” error if the schema was opened again later. written. (Bug #12027)

• NDB Cluster: When it could not copy a fragment, ndbd exited without printing a message about the condition to the error log. Now the message is written. (Bug #12900)

• NDB Cluster: When a disk full condition occurred, ndbd exited without printing a message about the condition to the error log. Now the message is written. (Bug #12716)

• mysql_fix_privilege_tables.sql was missing a comma, causing a syntax error when executed. (Bug #12705)

• STRCMP() was not handled correctly in views. (Bug #12489)

• NDB Cluster: Bad values in config.ini caused ndb_mdmd to crash. (Bug #12043)

• TRUNCATE TABLE did not work with TEMPORARY InnoDB tables. (Bug #11816)

• Built-in commands for the mysql client, such as delimiter and \d are now always parsed within files that are read using the \. and source commands. (Bug #11523)

• ALTER TABLE db_name.t RENAME t did not move the table to default database unless the new name was qualified with the database name. (Bug #11493)

• It was not possible to create a stored function with a spatial return value data type. (Bug #10499)

• The only valid values for the PACK_KEYS table option are 0 and 1, but other values were being accepted. (Bug #10056)

• If a DROP DATABASE fails on a master server due to the presence of a non-database file in the database directory, the master have have the database tables deleted, but not the slaves. To deal with failed database drops, we now write DROP TABLE statements to the binary log for the tables so that they are dropped on slaves. (Bug #4680)

• Improper use of loose index scan in InnoDB sometimes caused incorrect query results. (Bug #12672)

• DELETE or UPDATE for an indexed MyISAM table could fail. This was due to a change in end-space comparison behavior from 4.0 to 4.1. (Bug #12565)

• Joins on VARCHAR columns of different lengths could produce incorrect results. (Bug #11398)

• A “Duplicate column name” error no longer occurs when selecting from a view defined as SELECT * from a join that uses a USING clause on tables that have a common column name. (Bug #6558)

• Invocations of the SLEEP() function incorrectly could get optimized away for statements in which it occurs. Statements containing SLEEP() incorrectly could be stored in the query cache. (Bug #12689)

• NDB Cluster: An ALTER TABLE command caused loss of data stored prior to the issuing of the command. (Bug #12118)

• Query cache is switched off if a thread (connection) has tables locked. This prevents invalid results where the locking thread inserts values between a second thread connecting and selecting from the table. (Bug #12385)

• NOW(), CURRENT_TIME and values generated by timestamp columns are now constant for the duration of a stored function or trigger. This prevents the breaking of statements-based replication. (Bug #12480, Bug #12481)

• Some statements executed on a master server caused the SQL thread on a slave to run out of memory. (Bug #12532)

• A SELECT DISTINCT query with a constant value for one of the columns would return only a single row. (Bug #12625)

• NDB Cluster: Cluster failed to take character set data into account when recomputing hashes (and thus could not locate records for updating or deletion) following a configuration change and node restart. (Bug #12220)

• NDB Cluster: Wrong error message displayed when cluster management server closed port while mysqld was connecting. (Bug #10950)

• A view was allowed to depend on a function that referred to a temporary table. (Bug #10970)

• Prepared statement parameters could cause errors in the binary log if the character set was cp932. (Bug #11338)

• The CREATE_OPTIONS column of INFORMATION_SCHEMA.TABLES showed incorrect options for tables in INFORMATION_SCHEMA. (Bug #12397)

• MEMORY tables using B-Tree index on 64-bit platforms could produce false table is full errors. (Bug #12460)

• Issuing FLUSH INSTANCES followed by STOP INSTANCE caused instance manager to crash. (Bug #10957)

• Duplicate instructions in stored procedures resulted in incorrect execution when the optimizer optimized the duplicate code away. (Bug #12168)

• SHOW TABLES FROM returned wrong error message if the schema specified did not exist. (Bug #12591)

• The ROW() function returned an incorrect result when comparison involved NULL values. (Bug #12509)

• Views with multiple UNION and UNION ALL produced incorrect results. (Bug #10624)

• Stored procedures with particularly long loops could crash server due to memory leak. (Bug #12297, Bug #11247)

• Trigger and stored procedure execution could break replication. (Bug #12482)

• A server crash could result from an update of a view defined as a join, even though the update updated only a single table. (Bug #12569)

• On Windows when the --innodb_buffer_pool_awe_mem_mb option has been given, the server detects whether AWE support is available and has been compiled into the server, and displays an appropriate error message if not. (Bug #6581)

• The NUMERIC_SCALE column of the INFORMATION_SCHEMA.COLUMNS table should be returned as 0 for integer columns. It was being returned as NULL. (Bug #12301)

• The COLUMN_DEFAULT column of the INFORMATION_SCHEMA.COLUMNS table should be returned as NULL if a column has no default value. An empty string was being returned if the column was defined as NOT NULL. (Bug #12518)

• Slave I/O threads were considered to be in the running state when launched (rather than after successfully connecting to the master server), resulting in incorrect SHOW SLAVE STATUS output. (Bug #10780)

• Column names in subqueries must be unique, but were not being checked for uniqueness. (Bug #11796)

• On Windows, the server could crash during shutdown if both replication threads and normal client connection threads were active. (Bug #11796)

• Some subqueries of the form SELECT ... WHERE ROW(...) IN (subquery) were being handled incorrectly. (Bug #11867)

• Selecting from a view after INSERT statements for the view's underlying table yielded different results than subsequent selects. (Bug #12382)

• The mysql_info() C API function could return incorrect data when executed as part of a multi-statement that included a mix of statements that do and do not return information. (Bug #11688)

• When restoring INFORMATION_SCHEMA as the default database after failing to execute a stored procedure in an inaccessible database, the server returned a spurious ERROR 42000: Unknown database 'information_schema' message. (Bug #12318)

• Renamed the rest() macro in my_list.h to list_rest() to avoid name clashes with user code. (Bug #12327)

• DATE_ADD() and DATE_SUB() were converting invalid dates to NULL in TRADITIONAL SQL mode rather than rejecting them with an error. (Bug #10627)

• A trigger that included a SELECT statement could cause a server crash. (Bug #11587)

• An incorrect conversion from double to ulonglong caused indexes not to be used for BDB tables on HP-UX. (Bug #10802)

• myisampack failed to delete .TMD temporary files when run with -T option. (Bug #12235)

• Added portability check for Intel compiler to address a problem compiling InnoDB code. (Bug #11510)

• XA allowed two active transactions to be started with the same XID. (Bug #12162)

• Concatenating USER() or DATEBASE() with a column produced invalid results. (Bug #12351)

• Creating a view that included the TIMESTAMPDIFF() function resulted in a invalid view. (Bug #12298)

• Comparison of InnoDB multi-part primary keys that include VARCHAR columns can result in incorrect results. (Bug #12340)

• For PKG installs on Mac OS X, the preinstallation and postinstallation scripts were being run only for new installations and not for upgrade installations, resulting in an incomplete installation process. (Bug #11380)

• Using cursors and nested queries for the same table, corrupted results were returned for the outer query. (Bug #11909)

• User variables were not automatically cast for comparisons, causing queries to fail if the column and connection character sets differed. Now when mixing strings with different character sets but the same coercibility, allow conversion if one character set is a superset of the other. (Bug #10892)

• Selecting from a view defined as a join over many tables could result in a server crash due to miscalculation of the number of conditions in the WHERE clause. (Bug #12470)

• Pathame values for options such as ---basedir or --datadir didn't work on Japanese Windows machines for directory names containing multi-byte characters having a second byte of 0x5C (‘\’). (Bug #5439)

• A race condition between server threads could cause a crash if one thread deleted a stored routine while another thread was executing a stored routine. (Bug #12228)

• Mishanding of comparison for rows containg NULL values against rows produced by an IN subquery could cause a server crash. (Bug #12392)

• Inserting NULL into a GEOMETRY column for a table that has a trigger could result in a server crash if the table was subsequently dropped. (Bug #12281)

• A failure to obtain a lock for an IN SHARE MODE query could result in a server crash. (Bug #12082)

• SELECT ... INTO var_name within a trigger could cause a server crash. (Bug #11973)

• INSERT ... SELECT ... ON DUPLICATE KEY UPDATE could fail with an erroneous “Column 'col_name' specified twice” error. (Bug #10109)

• SHOW TABLE STATUS sometimes reported a Row_format value of Dynamic for MEMORY tables, though such tables always have a format of Fixed. (Bug #3094)

• A query using a LEFT JOIN, an IN subquery on the outer table, and an ORDER BY clause, caused the server to crash when cursors were enabled. (Bug #11901)

• Using a stored procedure that referenced tables in the INFORMATION_SCHEMA database would return an empty result set. (Bug #10055, Bug #12278)

• Columns defined as TINYINT(1) were redefined as TINYINT(4) when incorporated into a VIEW. (Bug #11335)

• ISO-8601 formatted dates were not being parsed correctly. (Bug #7308)

• FLUSH TABLES WITH READ LOCK combined with LOCK TABLE .. WRITE caused deadlock. (Bug #9459)

• NULL column definitions read incorrectly for inner tables of nested outer joins. (Bug #12154)

• GROUP_CONCAT ignores the DISTINCT modifier when used in a query joining multiple tables where one of the tables has a single row. (Bug #12095)

• UNION query with FULLTEXT could cause server crash. (Bug #11869)

• Security improvement: Applied a patch that addresses a potential zlib data vulnerability that could result in an application crash. (CAN-2005-1849) This only affects the binaries for platforms that are linked statically against the bundled zlib (most notably Microsoft Windows and HP-UX).

• SHOW CHARACTER SET and INFORMATION_SCHEMA now properly report the Latin1 character set as cp1252. (Bug #11216)

• mysqldump now dumps triggers for each dumped table. This can be suppressed with the --skip-triggers option. (Bug #10431)

• Added new ER_STACK_OVERRUN_NEED_MORE error message to indicate that, while the stack is not completely full, more stack space is required. (Bug #11213)

• NDB: Improved handling of the configuration variables NoOfPagesToDiskDuringRestartACC, NoOfPagesToDiskAfterRestartACC, NoOfPagesToDiskDuringRestartTUP, and NoOfPagesToDiskAfterRestartTUP should result in noticeably faster startup times for MySQL Cluster. (Bug #12149)

• Added support of where clause for queries with FROM DUAL. (Bug #11745)

• Added an optimization that avoids key access with NULL keys for the ref method when used in outer joins. (Bug #12144)

• Maximum size of stored procedures increased from 64k to 4Gb. (Bug #11602)

• Added error message for users who attempt CREATE TABLE ... LIKE and specify a non-table in the LIKE clause. (Bug #6859)

• DDL statements now are allowed in stored procedures if the procedure is not invoked from a stored function or a trigger. Also fixed problems where a TEMPORARY statement created by one stored routine was inaccessible to another routine invoked during the same connection. (Bug #11126)

• Creation of the mysql group account failed during the RPM installation. (Bug #12348)

• big5 strings were not being stored in FULLTEXT index. (Bug #12075)

• When DROP DATABASE was called concurrently with a DROP TABLE of any table the MySQL Server crashed. (Bug #12212)

• max_connections_per_hour setting was being capped by unrelated max_user_connections setting. (Bug #9947)

• SELECT @@local... returned @@session... in the column header. (Bug #10724)

• Multiplying ABS() output by a negative number would return incorrect results. (Bug #11402)

• Updated dependency list for RPM builds to include missing dependencies such as useradd and groupadd. (Bug #12233)

• mysql_install_db used static localhost value in GRANT tables even when server hostname is not localhost, such as localhost.localdomain. This change is applied to version 5.0.10b on Windows. (Bug #11822)

• Multiple SELECT SQL_CACHE queries in a stored procedure causes error and client hang. (Bug #6897)

• Added checks to prevent error when allocating memory when there was insufficient memory available. (Bug #7003)

• Character data truncated when GBK characters 0xA3A0 and 0xA1 are present. (Bug #11987)

• Comparisons like SELECT "A\\" LIKE "A\\"; fail when using SET NAMES utf8;. (Bug #11754)

• When used in a SELECT query against a view, the GROUP_CONCAT() function returned only a single row. (Bug #11412)

• Calling the C API function mysql_stmt_fetch() after all rows of a result set were exhausted would return an error instead of MYSQL_NO_DATA. (Bug #11037)

• Information about a trigger was not displayed in the output of SELECT ... FROM INFORMATION_SCHEMA.TRIGGERS when the selected database was INFORMATION_SCHEMA, prior to the trigger's first invocation. (Bug #12127)

• Issuing successive FLUSH TABLES WITH READ LOCK would cause the mysql client to hang. (Bug #11934)

• In stored procedures, a cursor that fetched an empty string into a variable would set the variable to NULL instead. (Bug #8692)

• A trigger dependent on a feature of one SQL_MODE setting would cause an error when invoked after the SQL_MODE was changed. (Bug #5891)

• A delayed insert that would duplicate an existing record crashed the server instead. (Bug #12226)

• ALTER TABLE when SQL_MODE = 'TRADITIONAL' gave rise to an invalid error message. (Bug #11964)

• Attempting to repair a table having a fulltext index on a column containing words whose length exceeded 21 characters and where myisam_repair_threads was greater than 1 would crash the server. (Bug #11684)

• The MySQL Cluster backup log was invalid where the number of Cluster nodes was not equal to a power of 2. (Bug #11675)

• GROUP_CONCAT() sometimes returned a result with a different collation that that of its arguments. (Bug #10201)

• The LPAD() and RPAD() functions returned the wrong length to mysql_fetch_fields(). (Bug #11311)

• A UNIQUE VARCHAR column would be mis-identified as MUL in table descriptions. (Bug #11227)

• Incorrect error message displayed if user attempted to create a table in a non-existing database using CREATE database_name.table_name syntax. (Bug #10407)

• InnoDB: Do not flush after each write, not even before setting up the doublewrite buffer. Flushing can be extremely slow on some systems. (Bug #12125)

• InnoDB: True VARCHAR: Return NULL columns in the format expected by MySQL. (Bug #12186)

• Two threads could potentially initialize different characters sets and overwrite each other. (Bug #12109)

• Unsigned LONG system variables may return incorrect value when retreived with a SELECT for certain values. (Bug #10351)

• Prepared statements were not being written to the Slow Query log. (Bug #9968)

• Security improvement: Applied a patch that addresses a zlib data vulnerability that could result in a buffer overflow and code execution. (CAN-2005-2096) (Bug #11844)

• Incompatible change: The namespace for triggers has changed. Previously, trigger names had to be unique per table. Now they must be unique within the schema (database). An implication of this change is that DROP TRIGGER syntax now uses a schema name instead of a table name (schema name is optional and, if omitted, the current schema will be used). (Bug #5892)

  Note: When upgrading from a previous version of MySQL 5 to MySQL 5.0.10 or newer, you must drop all triggers and re-create them or DROP TRIGGER will not work after the upgrade. A suggested procedure for doing this is given in Section 2.10.2, “Upgrading from Version 4.1 to 5.0”.

• The viewing of triggers and trigger metadata has been enhanced as follows:

  • An extension to the SHOW command has been added: SHOW TRIGGERS can be used to view a listing of triggers. See Section 13.5.4.20, “SHOW TRIGGERS Syntax” for details.

  • The INFORMATION_SCHEMA database now includes a TRIGGERS table. See Section 21.1.16, “The INFORMATION_SCHEMA TRIGGERS Table” for details. (Bug #9586)

• Triggers can now reference tables by name. See Section 19.1, “CREATE TRIGGER Syntax” for more information.

• The output of perror --help now displays the --ndb option. (Bug #11999)

• On Windows, the search path used by MySQL applications for my.ini now includes ..\my.ini (that is, the application's parent directory, and hence, the installation directory). (Bug #10419)

• Added mysql_get_character_set_info() C API function for obtaining information about the default character set of the current connection.

• The bundled version of the readline library was upgraded to version 5.0.

• It is no longer necessary to issue an explicit LOCK TABLES for any tables accessed by a trigger prior to executing any statements that might invoke the trigger. (Bug #9581, Bug #8406)

• MySQL Cluster: A new -P option is available for use with the ndb_mgmd client. When called with this option, ndb_mgmd prints all configuration data to stdout, then exits.

• NDB: Trying to use a greater number of tables then specified by the value of MaxNoOfTables caused table corruption such that data nodes could not be restarted. (Bug #9994)

• NDB: Attempting to create or drop tables during a backup would cause the cluster to shut down. (Bug #11942)

• When attempting to drop a table with a broken unique index, NDB failed to drop the table and erroneously report that the table was unknown. (Bug #11355)

• SELECT ... NOT IN() gave unexpected results when only static value present between the (). (Bug #11885)

• Fixed compile error when using GCC4 on AMD64. (Bug #12040)

• NDB ignored the Hostname option in the NDBD DEFAULT section of the Cluster configuration file. (Bug #12028)

• SHOW PROCEDURE/FUNCTION STATUS didn't work for users with limited access. (Bug #11577)

• MySQL server would crash is a fetch was performed after a ROLLBACK when cursors were involved. (Bug #10760)

• The temporary tables created by an ALTER TABLE on a cluster table were visible to all MySQL servers. (Bug #12055)

• NDB_MGMD was leaking file descriptors. (Bug #11898)

• IP addresses not shown in ndb_mgm SHOW command on second ndb_mgmd (or on ndb_mgmd restart). (Bug #11596)

• Functions that evaluate to constants (such as NOW() and CURRENT_USER() were being evaluated in the definition of a VIEW rather than included verbatim. (Bug #4663)

• Execution of SHOW TABLES failed to increment the Com_show_tables status variable. (Bug #11685)

• For execution of a stored procedure that refers to a view, changes to the view definition were not seen. The procedure continued to see the old contents of the view. (Bug #6120)

• For prepared statements, the SQL parser did not disallow ‘?’ parameter markers immediately adjacent to other tokens, which could result in malformed statements in the binary log. (For example, SELECT * FROM t WHERE? = 1 could become SELECT * FROM t WHERE0 = 1.) (Bug #11299)

• When two threads compete for the same table, a deadlock could occur if one thread has also a lock on another table through LOCK TABLES and the thread is attempting to remove the table in some manner and the other thread want locks on both tables. (Bug #10600)

• Aliasing the column names in a VIEW did not work when executing a SELECT query on the VIEW. (Bug #11399)

• Performing an ORDER BY on a SELECT from a VIEW produced unexpected results when VIEW and underlying table had the same column name on different columns. Bug #11709)

• The C API function mysql_statement_reset() did not clear error information. (Bug #11183)

• When used within a subquery, SUBSTRING() returned an empty string. (Bug #10269)

• Multiple-table UPDATE queries using CONVERT_TZ() would fail with an error. (Bug #9979)

• mysql_fetch_fields() returned incorrect length information for MEDIUM and LONG TEXT and BLOB columns. (Bug #9735)

• mysqlbinlog was failing the test suite on Windows due to BOOL being incorrectly cast to INT. (Bug #11567)

• NDBCLuster: Server left core files following shutdown if data nodes had failed. (Bug #11516)

• Creating a trigger in one database that references a table in another database was being allowed without generating errors. (Bug #8751)

• Duplicate trigger names were allowed within a single schema. (Bug #6182)

• Server did not accept some fully-qualified trigger names. (Bug #8758)

• The traditional SQL mode accepted invalid dates if the date value provided was the result of an implicit type conversion. (Bug #5906)

• The MySQL server had issues with certain combinations of basedir and datadir. (Bug #7249)

• INFORMATION_SCHEMA.COLUMNS had some inaccurate values for some data types. (Bug #11057)

• LIKE pattern matching using prefix index didn't return correct result. (Bug #11650)

• For several character sets, MySQL incorrectly converted the character code for the division sign to the eucjpms character set. (Bug #11717)

• When invoked within a view, SUBTIME() returned incorrect values. (Bug #11760)

• SHOW BINARY LOGS displayed a file size of 0 for all log files but the current one if the files were not located in the data directory. (Bug #12004)

• Server-side prepared statements failed for columns with a character set of ucs2. (Bug #9442)

• References to system variables in an SQL statement prepared with PREPARE were evaluated during EXECUTE to their values at prepare time, not to their values at execution time. (Bug #9359)

• For server shutdown on Windows, error messages of the form Forcing close of thread n user: 'name' were being written to the error log. Now connections are closed more gracefully without generating error messages. (Bug #7403)

• Increased the version number of the libmysqlclient shared library from 14 to 15 because it is binary incompatible with the MySQL 4.1 client library. (Bug #11893)

• A recent optimizer change caused DELETE … WHERE … NOT LIKE and DELETE … WHERE … NOT BETWEEN to not properly identify the rows to be deleted. (Bug #11853)

• Within a stored procedure that selects from a table, invoking another procedure that requires a write lock for the table caused that procedure to fail with a message that the table was read-locked. (Bug #9565)

• Within a stored procedure, selecting from a table through a view caused subsequent updates to the table to fail with a message that the table was read-locked. (Bug #9597)

• For a stored procedure defined with SQL SECURITY DEFINER characteristic, CURRENT_USER() incorrectly reported the use invoking the procedure, not the user who defined it. (Bug #7291)

• Creating a table with a SET or ENUM column with the DEFAULT 0 clause caused a server crash if the table's character set was utf8. (Bug #11819)

• With strict SQL mode enabled, ALTER TABLE reported spurious “Invalid default value” messages for columns that had no DEFAULT clause. (Bug #9881)

• In SQL prepared statements, comparisons could fail for values not equally space-padded. For example, SELECT 'a' = 'a '; returns 1, but PREPARE s FROM 'SELECT ?=?'; SET @a = 'a', @b = 'a '; PREPARE s FROM 'SELECT ?=?'; EXECUTE s USING @a, @b; incorrectly returned 0. (Bug #9379)

• Labels in stored routines did not work if the character set was not latin1. (Bug #7088)

• Invoking the DES_ENCRYPT() function could cause a server crash if the server was started without the --des-key-file option. (Bug #11643)

• The server crashed upon execution of a statement that used a stored function indirectly (via a view) if the function was not yet in the connection-specific stored routine cache and the statement would update a Handler_xxx status variable. This fix allows the use of stored routines under LOCK TABLES without explicitly locking the mysql.lock table. However, you cannot use mysql.proc in statements that will combine locking of it with modifications for other tables. (Bug #11554)

• The server crashed when dropping a trigger that invoked a stored procedure, if the procedure was not yet in the connection-specific stored routine cache. (Bug #11889)

• Selecting the result of an aggregate function for an ENUM or SET column within a subquery could result in a server crash. (Bug #11821)

• Incorrect column values could be retrieved from views defined using statements of the form SELECT * FROM tbl_name. (Bug #11771)

• The mysql.proc table was not being created properly with the proper utf8 character set and collation, causing server crashes for stored procedure operations if the server was using a multi-byte character set. To take advantage of the bug fix, mysql_fix_privilege_tables should be run to correct the structure of the mysql.proc table. (Bug #11365)

  Note that it is necessary to run mysql_fix_privileges_tables when upgrading from a previous installation that contains the mysql.proc table (that is, from a previous 5.0 installation). Otherwise, creating stored procedures might not work.

• Execution of a prepared statement that invoked a non-existent or dropped stored routine would crash the server. (Bug #11834)

• Executing a statement that invoked a trigger would cause problems unless a LOCK TABLES was first issued for any tables accessed by the trigger. Note: The exact nature of the problem depended upon the MySQL 5.0 release being used: prior to 5.0.3, this resulted in a crash; from 5.0.3 to 5.0.7, MySQL would issue a warning; in 5.0.9, the server would issue an error. (Bug #8406)

  The same issue caused LOCK TABLES to fail following UNLOCK TABLES if triggers were involved. (Bug #9581)

• In a shared Windows environment, MySQL could not find its configuration file unless the file was in the C:\ directory. (Bug #5354)

• An attempt to create a TIMESTAMP column with a display width (for example, TIMESTAMP(6)) now results in a warning. Display widths have not been supported for TIMESTAMP since MySQL 4.1. (Bug #10466)

• InnoDB: When creating or extending an InnoDB data file, at most one megabyte at a time is allocated for initializing the file. Previously, InnoDB allocated and initialized 1 or 8 megabytes of memory, even if only a few 16-kilobyte pages were to be written. This improves the performance of CREATE TABLE in innodb_file_per_table mode.

• InnoDB: Various optimizations. Removed unreachable debug code from non-debug builds. Added hints for the branch predictor in gcc. Made assertions occupy less space.

• InnoDB: Make innodb_thread_concurrency=20 by default. Bypass the concurrency checking if the setting is greater than or equal to 20.

• InnoDB: Make CHECK TABLE killable. (Bug #9730)

• Recursion in stored routines is now disabled because it was crashing the server. We plan to modify stored routines to allow this to operate safely in a future release. (Bug #11394)

• The handling of BIT columns has been improved, and should now be much more reliable in a number of cases. (Bug #10617, Bug #11091, Bug #11572)

• mysql_real_escape_string() API function now respects NO_BACKSLASH_ESCAPES SQL mode. (Bug #10214)

• SHOW CREATE VIEW did not take the ANSI MODE into account when quoting identifiers. (Bug #6903)

• The mysql_config script did not handle symbolic linking properly. (Bug #10986)

• Incorrect results when using GROUP BY ... WITH ROLLUP on a VIEW. (Bug #11639)

• Instances of the VAR_SAMP() function in view definitions were converted to VARIANCE(). This is incorrect because VARIANCE() is the same as VAR_POP(), not VAR_SAMP(). (Bug #10651)

• mysqldump failed when reloading a view if the view was defined in terms of a different view that had not yet been reloaded. mysqldump now creates a dummy table to handle this case. (Bug #10927)

• mysqldump could crash for illegal or nonexistent table names. (Bug #9358)

• The --no-data option for mysqldump was being ignored if table names were given after the database name. (Bug #9558)

• The --master-data option for mysqldump resulted in no error if the binary log was not enabled. Now an error occurs unless the --force option is given. (Bug #11678)

• DES_ENCRYPT() and DES_DECRYPT() require SSL support to be enabled, but were not checking for it. Checking for incorrect arguments or resource exhaustion was also improved for these functions. (Bug #10589)

• When used in joins, SUBSTRING() failed to truncate to zero any string values that could not be converted to numbers. (Bug #10124)

• mysqldump --xml did not format NULL column values correctly. (Bug #9657)

• There was a compression algorithm issue with myisampack for very large datasets (where the total size of of all records in a single column was on the order of 3 GB or more) on 64-bit platforms. (A fix for other platforms was made in MySQL 5.0.6.) (Bug #8321)

• Temporary tables were created in the data directory instead of tmpdir. (Bug #11440)

• MySQL would not compile correctly on QNX due to missing rint() function. (Bug #11544)

• A SELECT DISTINCT col_name would work correctly with a MyISAM table only when there was an index on col_name. (Bug #11484)

• The server would lose table-level CREATE VIEW and SHOW VIEW privileges following a FLUSH PRIVILEGES or server restart. (Bug #9795)

• In strict mode, an INSERT into a view that did not include a value for a NOT NULL column but that did include a WHERE test on the same column would succeed, This happened even though the INSERT should have been prevented due to the failure to supply a value for the NOT NULL column. (Bug #6443)

• Running a CHECK TABLES on multiple views crashed the server. (Bug #11337)

• When a table had a primary key containing a BLOB column, creation of another index failed with the error BLOB/TEXT column used in key specification without keylength, even when the new index did not contain a BLOB column. (Bug #11657)

• NDB Cluster: When trying to open a table that could not be discovered or unpacked, cluster would return error codes which the MySQL server falsely interpreted as operating system errors. (Bug #103651)

• Manually inserting a row with host='' into mysql.tables_priv and performing a FLUSH PRIVILEGES would cause the server to crash. (Bug #11330)

• A cursor using a query with a filter on a DATE or DATETIME column would cause the server to crash server after the data was fetched. (Bug #11172)

• Closing a cursor that was already closed would cause MySQL to hang. (Bug #9814)

• Using CONCAT_WS on a column set NOT NULL caused incorrect results when used in a LEFT JOIN. (Bug #11469)

• Signed BIGINT would not accept -9223372036854775808 as a DEFAULT value. (Bug #11215)

• Views did not use indexes on all appropriate queries. (Bug #10031)

• For MEMORY tables, it was possible for for updates to be performed using outdated key statistics when the updates involved only very small changes in a very few rows. This resulted in the random failures of queries such as UPDATE t SET col = col + 1 WHERE col_key = 2; where the same query with no WHERE clause would succeed. (Bug #10178)

• Optimizer performed range check when comparing unsigned integers to negative constants, could cause errors. (Bug #11185)

• Wrong comparison method used in VIEW when relaxed date syntax used (i.e. 2005.06.10). (Bug #11325)

• The ENCRYPT() and SUBSTRING_INDEX() functions would cause errors when used with a VIEW. (Bug #7024)

• Clients would hang following some errors with stored procedures. (Bug #9503)

• Combining cursors and subselects could cause server crash or memory leaks. (Bug #10736)

• If a prepared statement cursor is opened but not completely fetched, attempting to open a cursor for a second prepared statement will fail. (Bug #10794)

• MEMORY tables now support indexes of up to 500 bytes. See Section 14.3, “The MEMORY (HEAP) Storage Engine”. (Bug #10566)

• New SQL_MODE - NO_ENGINE_SUBSTITUTION Prevents automatic substitution of storage engine when the requested storage engine is disabled or not compiled in. (Bug #6877)

• The statements CREATE TABLE, TRUNCATE TABLE, DROP DATABASE, and CREATE DATABASE cause an implicit commit. (Bug #6883)

• Expanded on information provided in general log and slow query log for prepared statements. (Bug #8367, Bug #9334)

• Where a GROUP BY query uses a grouping column from the query's SELECT clause, MySQL now issues a warning. This is because the SQL standard states that any grouping column must unambiguously reference a column of the table resulting from the query's FROM clause, and allowing columns from the SELECT clause to be used as grouping columns is a MySQL extension to the standard.

  By way of example, consider the following table:

  CREATE TABLE users (
    userid INT NOT NULL PRIMARY KEY,
    username VARCHAR(25),
    usergroupid INT NOT NULL
  );
  

  MySQL allows you to use the alias in this query:

  SELECT usergroupid AS id, COUNT(userid) AS number_of_users
  FROM users
  GROUP BY id;
  

  However, the SQL standard requires that the column name be used, as shown here:

  SELECT usergroupid AS id, COUNT(userid) AS number_of_users
  FROM users
  GROUP BY usergroupid;
  

  Queries such as the first of the two shown above will continue to be supported in MySQL; however, beginning with MySQL 5.0.8, using a column alias in this fashion will generate a warning. Note that in the event of a collision between column names and/or aliases used in joins, MySQL attempts to resolve the conflict by giving preference to columns arising from tables named in the query's FROM clause. (Bug #11211)

• The granting or revocation of privileges on a stored routine is no longer performed when running the server with --skip-grant-tables even after the statement SET @@global.automatic_sp_privileges=1; has been executed. (Bug #9993)

• Added support for B'10' syntax for bit literal. (Bug #10650)

• Security fix: On Windows systems, a user with any of the following privileges

  • REFERENCES

  • CREATE TEMPORARY TABLES

  • GRANT OPTION

  • CREATE

  • SELECT

  on *.* could crash mysqld by issuing a USE LPT1; or USE PRN; command. In addition, any of the commands USE NUL;, USE CON;, USE COM1;, or USE AUX; would report success even though the database was not in fact changed. Note: Although this bug was thought to be fixed previously, it was later discovered to be present in the MySQL 5.0.7-beta release for Windows. (Bug #9148, CAN-2005-0799

• A CREATE TABLE db_name.tbl_name LIKE ... statement would crash the server when no database was selected. (Bug #11028)

• SELECT DISTINCT queries or GROUP BY queries without MIN() or MAX() could return inconsistent results for indexed columns. (Bug #11044)

• The SHOW INSTANCE OPTIONS command in MySQL Instance Manager displayed option values incorrectly for options for which no value had been given. (Bug #11200)

• An outer join with an empty derived table (a result from a subquery) returned no result. (Bug #11284)

• An outer join with an ON condition that evaluated to false could return an incorrect result. (Bug #11285)

• mysqld_safe would sometimes fail to remove the pid file for the old mysql process after a crash. As a result, the server would fail to start due to a false A mysqld process already exists... error. (Bug #11122)

• CAST( ... AS DECIMAL) didn't work for strings. (Bug #11283)

• NULLIF() function could produce incorrect results if first argument is NULL. (Bug #11142)

• Setting @@SQL_MODE = NULL caused an erroneous error message. (Bug #10732)

• Converting a VARCHAR column having an index to a different type (such as TINYTEXT) gave rise to an incorrect error message. (Bug #10543)

  Note that this bugfix induces a slight change in the behavior of indexes: If an index is defined to be the same length as a field (or is left to default to that field's length), and the length of the field is later changed, then the index will adopt the new length of the field. Previously, the size of the index did not change for some field types (such as VARCHAR) when the field type was changed.

• sql_data_access column of routines table of INFORMATION_SCHEMA was empty. (Bug #11055)

• A CAST() value could not be included in a VIEW. (Bug #11387)

• Server crashed when using GROUP BY on the result of a DIV operation on a DATETIME value. (Bug #11385)

• Possible NULL values in BLOB columns could crash the server when a BLOB was used in a GROUP BY query. (Bug #11295)

• Fixed 64 bit compiler warning for packet length in replication. (Bug #11064)

• Multiple range accesses in a subquery cause server crash. (Bug #11487)

• An issue with index merging could cause suboptimal index merge plans to be chosen when searching by indexes created on DATE columns. The same issue caused the InnoDB storage engine to issue the warning using a partial-field key prefix in search. (Bug #8441)

• The mysqlhotcopy script was not parsing the output of SHOW SLAVE STATUS correctly when called with the --record_log_pos option. (Bug #7967)

• SELECT * FROM table returned incorrect results when called from a stored procedure, where table had a primary key. (Bug #10136)

• When used in defining a view, the TIME_FORMAT() function failed with calculated values, for example, when passed the value returned by SEC_TO_TIME(). (Bug #7521)

• SELECT DISTINCT ... GROUP BY constant returned multiple rows (it should return a single row). (Bug #8614)

• INSERT INTO SELECT FROM view produced incorrect result when using ORDER BY. (Bug #11298)

• Fixed hang/crash with Boolean full-text search where a query contained more query terms that one-third of the query length (it could be achieved with truncation operator: 'a*b*c*d*'). (Bug #7858)

• Fixed column name generation in VIEW creation to ensure there are no duplicate column names. (Bug #7448)

• An ORDER BY clause sometimes had no effect on the ordering of a result when selecting specific columns (as opposed to using SELECT *) from a view. (Bug #7422)

• Some data definition statements (CREATE TABLE where the table was not a temporary table, TRUNCATE TABLE, DROP DATABASE, and CREATE DATABASE) were not being written to the binary log after a ROLLBACK. This also caused problems with replication. (Bug #6883)

• Calling a stored procedure that made use of an INSERT ... SELECT ... UNION SELECT ... query caused a server crash. (Bug #11060)

• Selecting from a view defined using SELECT SUM(DISTINCT ...) caused an error; attempting to execute a SELECT * FROM INFORMATION_SCHEMA.TABLES query after defining such a view crashed the server. (Bug #7015)

• The mysql client would output a prompt twice following input of very long strings, because it incorrectly assumed that a call to the _cgets() function would clear the input buffer. (Bug #10840)

• A three byte buffer overflow in the client functions caused improper exiting of the client when reading a command from the user. (Bug #10841)

• Fixed a problem where a stored procedure caused a server crash if the query cache was enabled. (Bug #9715)

• SHOW CREATE DATABASE INFORMATION_SCHEMA returned an “unknown database” error. (Bug #9434)

• Corrected a problem with IFNULL() returning an incorrect result on 64-bit systems. (Bug #11235)

• Fixed a problem resolving table names with lower_case_table_names=2 when the table name lettercase differed in the FROM and WHERE clauses. (Bug #9500)

• Fixed server crash due to some internal functions not taking into account that for multi-byte character sets, CHAR columns could exceed 255 bytes and VARCHAR columns could exceed 65,535 bytes. (Bug #11167)

• Fixed locking problems for multiple-statement DELETE statements performed within a stored routine, such as incorrectly locking a to-be-modified table with a read lock rather than a write lock. (Bug #11158)

• Fixed a portability problem testing for crypt() support that caused compilation problems when using OpenSSL/yaSSL on HP-UX and Mac OS X. (Bug #10675, Bug #11150)

• The hostname cache was not working. (Bug #10931)

• On Windows, mysqlshow did not interpret wildcard characters properly if they were given in the table name argument. (Bug #10947)

• The default hostname for MySQL server was always mysql. (Bug #11174)

• Using PREPARE to prepare a statement that invoked a stored routine that deallocated the prepared statement caused a server crash. This is prevented by disabling dynamic SQL within stored routines. (Bug #10975) (Note: This restriction was lifted in 5.0.13 for stored procedures, but not stored functions or triggers.)

• Using PREPARE to prepare a statement that invoked a stored routine that executed the prepared statement caused a Packets out of order error the second time the routine was invoked. This is prevented by disabling dynamic SQL within stored routines. (Bug #7115) (Note: This restriction was lifted in 5.0.13 for stored procedures, but not stored functions or triggers.)

• Using prepared statements within a stored routine (PREPARE, EXECUTE, DEALLOCATE) could cause the client connection to be dropped after the routine returned. This is prevented by disabling dynamic SQL within stored routines. (Bug #10605) (Note: This restriction was lifted in 5.0.13 for stored procedures, but not stored functions or triggers.)

• When using a cursor with a prepared statement, the first execution returned the correct result but was not cleaned up properly, causing subsequent executions to return incorrect results. (Bug #10729)

• MySQL Cluster: Connections between data nodes and management nodes were not being closed following shutdown of ndb_mgmd. (Bug #11132)

• MySQL Cluster: mysqld processes would not reconnect to cluster following restart of ndb_mgmd. (Bug #11221)

• MySQL Cluster: Fixed problem whereby data nodes would fail to restart on 64-bit Solaris (Bug #9025)

• MySQL Cluster: Calling ndb_select_count() crashed the cluster when running on Red Hat Enterprise 4/64-bit/Opteron. (Bug #10058)

• MySQL Cluster: Insert records were incorrectly applied by ndb_restore, thus making restoration from backup inconsistent if the binlog contained inserts. (Bug #11166)

• MySQL Cluster: Cluster would time out and crash after first query on 64-bit Solaris 9. (Bug #8918)

• MySQL Cluster: ndb_mgm client show command displayed incorrect output after master data node failure. (Bug #11050)

• MySQL Cluster: A delete performed as part of a transaction caused an erroneous result. (Bug #11133)

• MySQL Cluster: Not allowing sufficient parallelism in cluster configuration (e.g. NoOfTransactions too small) caused ndb_restore to fail without providing any error messages. (Bug #10294)

• MySQL Cluster: When using dynamically allocated ports on Linux, cluster would hang on initial startup. (Bug #10893)

• MySQL Cluster: Setting TransactionInactiveTimeout= 0 did not result in an infinite timeout. (Bug #11290)

• InnoDB: Enforce maximum CHAR_LENGTH() of UTF-8 data in ON UPDATE CASCADE. (Bug #10409)

• InnoDB: Pad UTF-8 variable-length CHAR columns with 0x20. Pad UCS2 CHAR columns with 0x0020. (Bug #10511)

• Security improvement: Applied a patch to fix a UDF library-loading vulnerability that could result in a buffer overflow and code execution. (http://www.appsecinc.com/resources/alerts/mysql/2005-002.html)

• Added mysql_set_character_set() C API function for setting the default character set of the current connection. This allows clients to affect the character set used by mysql_real_escape_string(). (Bug #8317)

• The behavior of the Last_query_cost system variable has been changed. The default value is now 0 (rather than -1) and it now has session-level scope (rather than being global). See Section 5.3.4, “Server Status Variables” for additional information.

• All characters occuring on the same line following the DELIMITER keyword will be set as delimiter. For example, DELIMITER :; will set :; as the delimiter. This behavior is now consistent between MySQL 5.1 and MySQL 5.0. (Bug #9879)

• The table, type, and rows columns of EXPLAIN output can now be NULL. This is required for using EXPLAIN on SELECT queries that use no tables (i.e. EXPLAIN SELECT 1). (Bug #9899)

• Placeholders now can be used for LIMIT in prepared statements. (Bug #7306)

• SHOW BINARY LOGS now displays a File_size column that indicates the size of each file.

• The --delayed-insert option for mysqldump has been disabled to avoid causing problems with storage engines that do not support INSERT DELAYED. (Bug #7815)

• Improved the optimizer to be able to use indexes for expressions of the form indexed_col NOT IN (val1, val2, ...) and indexed_col NOT BETWEEN val1 AND val2.. (Bug #10561)

• Removed mysqlshutdown.exe and mysqlwatch.exe from the Windows “No Installer” distribution (they had already been removed from the “With Installer” distribution before). Removed those programs from the source distribution.

• Removed WinMySQLAdmin from the source distribution and from the “No Installer” Windows distribution (it had already been removed from the “With Installer” distribution before).

• InnoDB: In stored procedures and functions, InnoDB no longer takes full explicit table locks for every involved table. Only `intention' locks are taken, similar to those in the execution of an ordinary SQL statement. This greatly reduces the number of deadlocks.

• Security update: A user with limited privileges could obtain information about the privileges of other users by querying objects in the INFORMATION_SCHEMA database for which that user did not have the requisite privileges. (Bug #10964)

• Triggers with dropped functions caused crashes. (Bug #5893)

• Failure of a BEFORE trigger did not prevent the triggering statement from performing its operation on the row for which the trigger error occurred. Now the triggering statement fails as described in Section 19.3, “Using Triggers”. (Bug #10902)

• Issuing a write lock for a table from one client prevented other clients from accessing the table's metadata. For example, if one client issued a LOCK TABLES mydb.mytable WRITE, then a second client attempting to execute a USE mydb; would hang. (Bug #9998)

• The LAST_DAY() failed to return NULL when supplied with an invalid argument. See Section 12.5, “Date and Time Functions”. (Bug #10568)

• The functions COALESCE(), IF(), and IFNULL() performed incorrect conversions of their arguments. (Bug #9939)

• The TIME_FORMAT() function returned incorrect results with some format specifiers. See Section 12.5, “Date and Time Functions”. (Bug #10590)

• Dropping stored routines when the MySQL server had been started with --skip-grant-tables generated extraneous warnings. (Bug #9993)

• A problem with the my_global.h file caused compilation of MySQL to fail on single-processor Linux systems running 2.6 kernels. (Bug #10364)

• The ucs2_turkish_ci collation failed with upper('i'). UPPER/LOWER now can return a string with different length. (Bug #8610)

• OPTIMIZE of InnoDB table does not return 'Table is full' if out of tablespace. (Bug #8135)

• GROUP BY queries with ROLLUP returned wrong results for expressions containing group by columns. (Bug #7894)

• Fixed bug in FIELD() function where value list contains NULL. (Bug #10944)

• Corrected a problem where an incorrect column type was returned in the result set metadata when using a prepared SELECT DISTINCT statement to select from a view. (Bug #11111)

• Fixed bug in the MySQL Instance manager that caused the version to always be unknown when SHOW INSTANCE STATUS was issued. (Bug #10229)

• Using ORDER BY to sort the results of an IF() that contained a FROM_UNIXTIME() expression returned incorrect results due to integer overflow. (Bug #9669)

• Fixed a server crash resulting from accessing InnoDB tables within stored functions. This is handled by prohibiting statements that do an implicit or explicit commit or rollback within stored functions or triggers. (Bug #10015)

• Fixed a server crash resulting from the second invocation of a stored procedure that selected from a view defined as a join that used ON in the join conditions. (Bug #6866)

• Using ALTER TABLE for a table that had a trigger caused a crash when executing a statement that activated the trigger, and also a crash later with USE db_name for the database containing the table. (Bug #5894)

• Fixed a server crash resulting from an attempt to allocate too much memory when GROUP BY blob_col and COUNT(DISTINCT) were used. (Bug #11088)

• Fixed a portability problem for compiling on Windows with Visual Studio 6. (Bug #11153)

• The incorrect sequence of statements HANDLER tbl_name READ index_name NEXT without a preceding HANDLER tbl_name READ index_name = (value_list) for an InnoDB table resulted in a server crash rather than an error. (Bug #5373)

• On Windows, with lower_case_table_names set to 2, using ALTER TABLE to alter a MEMORY or InnoDB table that had a mixed-case name also improperly changed the name to lowercase. (Bug #9660)

• The server timed out SSL connections too quickly on Windows. (Bug #8572)

• Executing LOAD INDEX INTO CACHE for a table while other threads where selecting from the table caused a deadlock. (Bug #10602)

• Fixed a server crash resulting from CREATE TABLE ... SELECT that selected from a table being altered by ALTER TABLE. (Bug #10224)

• The FEDERATED storage engine properly handled outer joins, but not inner joins. (Bug #10848)

• Consistently report INFORMATION_SCHEMA table names in uppercase in SHOW TABLE STATUS output. (Bug #10059)

• Fixed a failure of WITH ROLLUP to sum values properly. (Bug #10982)

• Triggers were not being activated for multiple-table UPDATE or DELETE statements. (Bug #5860)

• INSERT BEFORE triggers were not being activated for INSERT ... SELECT statements. (Bug #6812)

• INSERT BEFORE triggers were not being activated for implicit inserts (LOAD DATA). (Bug #8755)

• If a stored function contained a FLUSH statement, the function crashed when invoked. FLUSH now is disallowed within stored functions. (Bug #8409)

• Multiple-row REPLACE could fail on a duplicate-key error when having one AUTO_INCREMENT key and one unique key. (Bug #11080)

• Fixed a server crash resulting from invalid string pointer when inserting into the mysql.host table. (Bug #10181)

• Multiple-table DELETE did always delete on the fly from the first table that was to be deleted from. In some cases, when using many tables and it was necessary to access the same row twice in the first table, we could miss some rows-to-be-deleted from other tables. This is now fixed.

• The mysql_next_result() function could hang if you were executing many statements in a mysql_real_query() call and one of those statements raised an error. (Bug #9992)

• The combination of COUNT(), DISTINCT, and CONCAT() sometimes triggered a memory deallocation bug on Windows resulting in a server crash. (Bug #9593)

• InnoDB: Do very fast shutdown only if innodb_fast_shutdown=2, but wait for threads to exit and release allocated memory if innodb_fast_shutdown=1. Starting with MySQL/InnoDB 5.0.5, InnoDB would do brutal shutdown also when innodb_fast_shutdown=1. (Bug #9673)

• InnoDB: Fixed InnoDB: Error: stored_select_lock_type is 0 inside ::start_stmt()! in a stored procedure call if innodb_locks_unsafe_for_binlog was set in my.cnf. (Bug #10746)

• InnoDB: Fixed a duplicate key error that occurred with REPLACE in a table with an AUTO-INC column. (Bug #11005)

• MySQL would pass an incorrect key length to storage engines for MIN(). This could cause warnings InnoDB: Warning: using a partial-field key prefix in search. in the .err log. (Bug #11039, same as Bug #13218 in MySQL 4.1.15)

• Fixed a server crash for INSERT or UPDATE when the WHERE clause contained a correlated subquery that referred to a column of the table being modified. (Bug #6384)

• Fixed a problem causing an incorrect result for columns that include an aggregate function as part of an expression when WITH ROLLUP is added to GROUP BY. (Bug #7914)

• Fixed a problem with returning an incorrect result from a view that selected a COALESCE() expression from the result of an outer join. (Bug #9938)

• MySQL was adding a DEFAULT clause to ENUM columns that included no explicit DEFAULT and were defined as NOT NULL. (This is supposed to happen only for columns that are NULL.) (Bug #6267)

• Corrected inappropriate error messages that were displayed when attempting to set the read-only warning_count and error_count system variables. (Bug #10339)

• Incompatible change: MyISAM and InnoDB tables created with DECIMAL columns in MySQL 5.0.3 to 5.0.5 will appear corrupt after an upgrade to MySQL 5.0.6. Dump such tables with mysqldump before upgrading, and then reload them after upgrading. (The same incompatibility will occur for these tables created in MySQL 5.0.6 after a downgrade to MySQL 5.0.3 to 5.0.5.) (Bug #10465, Bug #10625)

• The precision of the DECIMAL data type has been increased from 64 to 65 decimal digits.

• Added the div_precision_increment system variable, which indicates the number of digits of precision by which to increase the result of division operations performed with the / operator.

• Added the log_bin_trust_routine_creators system variable, which applies when binary logging is enabled. It controls whether stored routine creators can be trusted not to create stored routines that will cause unsafe events to be written to the binary log.

• Added the --log-bin-trust-routine-creators server option for setting the log_bin_trust_routine_creators system variable from the command line.

• Implemented the STMT_ATTR_PREFETCH_ROWS option for the mysql_stmt_attr_set() C API function. This sets how many rows to fetch at a time when using cursors with prepared statements.

• The GRANT and REVOKE statements now support an object_type clause to be used for disambiguating whether the grant object is a table, a stored function, or a stored procedure. Use of this clause requires that you upgrade your grant tables. See Section 2.10.3, “Upgrading the Grant Tables”. (Bug #10246)

• Added REFERENCED_TABLE_SCHEMA, REFERENCED_TABLE_NAME, and REFERENCED_COLUMN_NAME columns to the KEY_COLUMN_USAGE table of INFORMATION_SCHEMA. (Bug #9587)

• Added a --show-warnings option to mysql to cause warnings to be shown after each statement if there are any. This option applies to interactive and batch mode. In interactive mode, \w and \W may be used to enable and disable warning display. (Bug #8684)

• Removed a limitation that prevented use of FIFOs as logging targets (such as for the general query log). This modification does not apply to the binary log and the relay log. (Bug #8271)

• Added a --debug option to my_print_defaults.

• When the server cannot read a table because it cannot read the .frm file, print a message that the table was created with a different version of MySQL. (This can happen if you create tables that use new features and then downgrade to an older version of MySQL.) (Bug #10435)

• SHOW VARIABLES now shows the slave_compressed_protocol, slave_load_tmpdir and slave_skip_errors system variables. (Bug #7800)

• Removed unused system variable myisam_max_extra_sort_file_size.

• Changed default value of myisam_data_pointer_size from 4 to 6. This allows us to avoid table is full errors for most cases.

• The variable concurrent_insert now takes 3 values. Setting this to 2 changes MyISAM to do concurrent inserts to end of table if table is in use by another thread.

• New /*> prompt for mysql. This prompt indicates that a /* ... */ comment was begun on an earlier line and the closing */ sequence has not yet been seen. (Bug #9186)

• If strict SQL mode is enabled, VARCHAR and VARBINARY columns with a length greater than 65,535 no longer are silently converted to TEXT or BLOB columns. Instead, an error occurs. (Bug #8295, Bug #8296)

• The INFORMATION_SCHEMA.SCHEMATA table now has a DEFAULT_COLLATION_NAME column. (Bug #8998)

• InnoDB: When the maximum length of SHOW INNODB STATUS output would be exceeded, truncate the beginning of the list of active transactions, instead of truncating the end of the output. (Bug #5436)

• InnoDB: If innodb_locks_unsafe_for_binlog option is set and the isolation level of the transaction is not set to serializable then InnoDB uses a consistent read for select in clauses like INSERT INTO ... SELECT and UPDATE ... (SELECT) that do not specify FOR UPDATE or IN SHARE MODE. Thus no locks are set to rows read from selected table.

• Updated version of libedit to 2.9. (Bug #2596)

• Removed mysqlshutdown.exe and mysqlwatch.exe from the Windows “With Installer” distribution.

• An error in the implementation of the MyISAM compression algorithm caused myisampack to fail with very large sets of data (total size of all the records in a single column needed to be >= 3 GB in order to trigger this issue). (Bug #8321)

• Statements that create and use stored routines were not being written to the binary log, which affects replication and data recovery options. (Bug #2610) Stored routine-related statements now are logged, subject to the issues and limitations discussed in Section 18.4, “Binary Logging of Stored Routines and Triggers”

• Disabled binary logging within stored routines to avoid writing spurious extra statements to the binary log. For example, if a routine p() executes an INSERT statement, then for CALL p(), the CALL statement appears in the binary log, but not the INSERT statement. (Bug #9100)

• Statements that create and drop triggers were not being written to the binary log, which affects replication and data recovery options. (Bug #10417) Trigger-related statements now are logged, subject to the issues and limitations discussed in Section 18.4, “Binary Logging of Stored Routines and Triggers”

• The mysql_stmt_execute() and mysql_stmt_reset() C API functions now close any cursor that is open for the statement, which prevents a server crash. (Bug #9478)

• The mysql_stmt_attr_set() C API function now returns an error for option values that are defined in mysql.h but not yet implemented, such as CURSOR_TYPE_SCROLLABLE. (Bug #9643)

• MERGE tables could fail on Windows due to incorrect interpretation of pathname separator characters for filenames in the .MRG file. (Bug #10687)

• Fixed a server crash for INSERT ... ON DUPLICATE KEY UPDATE with MERGE tables, which do not have unique indexes. (Bug #10400)

• Fix FORMAT() to do better rounding for double values (for example, FORMAT(4.55,1) returns 4.6, not 4.5). (Bug #9060)

• Disallow use of SESSION or GLOBAL for user variables or local variables in stored routines. (Bug #9286)

• Fixed a server crash when using GROUP BY ... WITH ROLLUP on an indexed column in an InnoDB table. (Bug #9798)

• In strict SQL mode, some assignments to numeric columns that should have been rejected were not (such as the result of an arithmetic expression or an explicit CAST() operation). (Bug #6961)

• CREATE TABLE t AS SELECT UUID() created a VARCHAR(12) column, which is too small to hold the 36-character result from UUID(). (Bug #9535)

• Fixed a server crash in the BLACKHOLE storage engine. (Bug #10175)

• Fixed a server crash resulting from repeated calls to ABS() when the argument evaluated to NULL. (Bug #10599)

• For a user-defined function invoked from within a prepared statement, the UDF's initialization routine was invoked for each execution of the statement, but the deinitialization routine was not. (It was invoked only when the statement was closed.) Similarly, when invoking a UDF from within a trigger, the initialization routine was invoked but the deinitialization routine was not. For UDFs that have an expensive deinit function (such as myperl, this bugfix will have negative performance consequences. (Bug #9913)

• Portability fix for Cygwin: Don't use #pragma interface in source files. (Bug #10241)

• Fix CREATE TABLE ... LIKE to work when lower_case_table_names is set on a case-sensitive filesystem and the source table name is not given in lowercase. (Bug #9761)

• Fixed a server crash resulting from a CHECK TABLE statement where the arguments were a view name followed by a table name. (Bug #9897)

• Within a stored procedure, attempting to update a view defined as an inner join failed with a Table 'tbl_name' was locked with a READ lock and can't be updated error. (Bug #9481)

• Fixed a problem with INFORMATION_SCHEMA tables being inaccessible depending on lettercase used to refer to them. (Bug #10018)

• my_print_defaults was ignoring the --defaults-extra-file option or crashing when the option was given. (Bug #9136, Bug #9851)

• The INFORMATION_SCHEMA.COLUMNS table was missing columns of views for which the user has access. (Bug #9838)

• Fixed a mysqldump crash that occurred with the --complete-insert option when dumping tables with a large number of long column names. (Bug #10286)

• Corrected a problem where DEFAULT values where not assigned properly to BIT(1) or CHAR(1) columns if certain other columns preceded them in the table definition. (Bug #10179)

• For MERGE tables, avoid writing absolute pathnames in the .MRG file for the names of the constituent MyISAM tables so that if the data directory is moved, MERGE tables will not break. For mysqld, write just the MyISAM table name if it is in the same database as the MERGE table, and a path relative to the data directory otherwise. For the embedded servers, absolute pathnames may still be used. (Bug #5964)

• Corrected a problem resolving outer column references in correlated subqueries when using the prepared statements. (Bug #10041)

• Corrected the error message for exceeding the MAX_CONNECTIONS_PER_HOUR limit to say max_connections_per_hour instead of max_connections. (Bug #9947)

• Fixed incorrect memory block allocation for the query cache in the embedded server. (Bug #9549)

• Corrected an inability to select from a view within a stored procedure. (Bug #9758)

• Fixed a server crash resulting from use of AVG(DISTINCT) with GROUP BY ... WITH ROLLUP. (Bug #9799)

• Fixed a server crash resulting from use of DISTINCT AVG() with GROUP BY ... WITH ROLLUP. (Bug #9800)

• Fixed a server crash resulting from use of a CHAR or VARCHAR column with MIN() or MAX() and GROUP BY ... WITH ROLLUP. (Bug #9820)

• Fixed a server crash resulting from use of SELECT DISTINCT with a prepared statement that uses a cursor. (Bug #9520)

• Fixed server crash resulting from multiple calls to a stored procedure that assigned the result of a subquery to a variable or compared it to a value with IN. (Bug #5963)

• Selecting from a single-table view defined on multiple-table views caused a server crash. (Bug #8528)

• If the file named by a --defaults-extra-file option does not exist or is otherwise inaccessible, an error now occurs. (Bug #5056)

• net_read_timeout and net_write_timeout were not being respected on Windows. (Bug #9721)

• SELECT from INFORMATION_SCHEMA tables failed if the statement has a GROUP BY clause and an aggregate function in the select list. (Bug #9404)

• Corrected some failures of prepared statements for SQL (PREPARE plus EXECUTE) to return all rows for some SELECT statements. (Bug #9096, Bug #9777)

• Remove extra slashes in --tmpdir value (for example, convert /var//tmp to /var/tmp, because they caused various errors. (Bug #8497)

• Added Create_routine_priv, Alter_routine_priv, and Execute_priv privileges to the mysql.host privilege table. (They had been added to mysql.db in MySQL 5.0.3 but not to the host table.) (Bug #8166)

• Fixed configure to properly recognize whether NTPL is available on Linux. (Bug #2173)

• Incomplete results were returned from INFORMATION_SCHEMA.COLUMNS for INFORMATION_SCHEMA tables for non-root users. (Bug #10261)

• Fixed a portability problem in compiling mysql.cc with VC++ on Windows. (Bug #10245)

• SELECT 0/0 returned 0 rather than NULL. (Bug #10404)

• MAX() for an INT UNSIGNED (unsigned 4-byte integer) column could return negative values if the column contained values larger than 2³¹. (Bug #9298)

• SHOW CREATE VIEW got confused and could not find the view if there was a temporary table with the same name as the view. (Bug #8921)

• Fixed a deadlock resulting from use of FLUSH TABLES WITH READ LOCK while an INSERT DELAYED statement is in progress. (Bug #7823)

• The optimizer was choosing suboptimal execution plans for certain outer joins where the right table of a left join (or left table of a right join) had both ON and WHERE conditions. (Bug #10162)

• RENAME TABLE for an ARCHIVE table failed if the .arn file was not present. (Bug #9911)

• Invoking a stored function that executed a SHOW statement resulted in a server crash. (Bug #8408)

• Fixed problems with static variables and do not link with libsupc++ to allow building on FreeBSD 5.3. (Bug #9714)

• Fixed some awk script portability problems in cmd-line-utils/libedit/makelist.sh. (Bug #9954)

• Fixed a problem with mishandling of NULL key parts in hash indexes on VARCHAR columns, resulting in incorrect query results. (Bug #9489, Bug #10176)

• InnoDB: Fixed a critical bug in InnoDB AUTO_INCREMENT: it could assign the same value for several rows. (Bug #10359) InnoDB: All InnoDB bug fixes from 4.1.12 and earlier versions, and also the fixes to bugs #10335 and #10607 listed in the 4.1.13 change notes.

• Added support for the BIT data type to the MEMORY, InnoDB, and BDB storage engines.

• SHOW VARIABLES no longer displays the deprecated log_update system variable. (Bug #9738)

• The behavior controlled by the --innodb-fast-shutdown option now can be changed at runtime by setting the value of the global innodb_fast_shutdown system variable. It now accepts values 0, 1 and 2 (except on Netware where 2 is disabled). If set to 2, then when the MySQL server shuts down, InnoDB will just flush its logs and shut down brutally (and quickly) as if a MySQL crash had occurred; no committed transaction will be lost, but a crash recovery will be done at next startup.

• Security fix: If mysqld was started with --user=non_existent_user, it would run using the privileges of the account it was invoked from, even if that was root. (Bug #9833)

• Corrected a failure to resolve a column reference correctly for a LEFT JOIN that compared a join column to an IN subquery. (Bug #9338)

• Fixed a problem where, after an internal temporary table in memory became too large and had to be converted to an on-disk table, the error indicator was not cleared and the query failed with error 1023 (Can't find record in ''). (Bug #9703)

• Multiple-table updates could produce spurious data-truncation warnings if they used a join across columns that are indexed using a column prefix. (Bug #9103)

• Fixed a string-length comparison problem that caused mysql to fail loading dump files containing certain ‘\’-sequences. (Bug #9756)

• Fixed a failure to resolve a column reference properly when an outer join involving a view contained a subquery and the column was used in the subquery and the outer query. (Bug #6106, Bug #6107)

• Use of a subquery that used WITH ROLLUP in the FROM clause of the main query sometimes resulted in a Column cannot be null error. (Bug #9681)

• Fixed a memory leak that occurred when selecting from a view that contained a subquery. (Bug #10107)

• Fixed an optimizer bug in computing the union of two ranges for the OR operator. (Bug #9348)

• Fixed a segmentation fault in mysqlcheck that occurred when the last table checked in --auto-repair mode returned an error (such as the table being a MERGE table). (Bug #9492)

• SET @var= CAST(NULL AS [INTEGER|CHAR]) now sets the result type of the variable to INTEGER/CHAR. (Bug #6598)

• Incorrect results were returned for queries of the form SELECT ... LEFT JOIN ... WHERE EXISTS (subquery), where the subquery selected rows based on an IS NULL condition. (Bug #9516)

• Executing LOCK TABLES and then calling a stored procedure caused an error and resulting in the server thinking that no stored procedures exist. (Bug #9566)

• Selecting from a view containing a subquery caused the server to hang. (Bug #8490)

• Within a stored procedure, attempting to execute a multiple-table UPDATE failed with a Table 'tbl_name' was locked with a READ lock and can't be updated error. (Bug #9486)

• Starting mysqld with the --skip-innodb and --default-storage-engine=innodb (or --default-table-type=innodb caused a server crash. (Bug #9815)

• Queries containing CURRENT_USER() incorrectly were registered in the query cache. (Bug #9796)

• Setting the storage_engine system variable to MEMORY succeeded, but retrieving the variable resulted in a value of HEAP (the old name for the MEMORY storage engine) rather than MEMORY. (Bug #10039)

• mysqlshow displayed an incorrect row count for tables. (Bug #9391)

• The server died with signal 11 if a non-existent location was specified for the location of the binary log. Now the server exits after printing an appropriate error messsage. (Bug #9542)

• Fixed a problem in the client/server protocol where the server closed the connection before sending the final error message. The problem could show up as a Lost connection to MySQL server during query when attempting to connect to access a non-existent database. (Bug #6387, Bug #9455)

• Fixed a readline-related crash in mysql when the user pressed Control-R. (Bug #9568)

• For stored functions that should return a YEAR value, corrected a failure of the value to be in YEAR format. (Bug #8861)

• Fixed a server crash resulting from invocation of a stored function that returned a value having an ENUM or SET data type. (Bug #9775)

• Fixed a server crash resulting from invocation of a stored function that returned a value having a BLOB data type. (Bug #9102)

• Fixed a server crash resulting from invocation of a stored function that returned a value having a BIT data type. (Bug #7648)

• TIMEDIFF() with a negative time first argument and postive time second argument produced incorrect results. (Bug #8068)

• Fixed a problem with OPTIMIZE TABLE for InnoDB tables being written twice to the binary log. (Bug #9149)

• InnoDB: Prevent ALTER TABLE from changing the storage engine if there are foreign key constraints on the table. (Bug #5574, Bug #5670)

• InnoDB: Fixed a bug where next-key locking doesn't allow the insert which does not produce a phantom. (Bug #9354) If the range is of type 'a' <= uniquecolumn, InnoDB lock only the RECORD, if the record with the column value 'a' exists in a CLUSTERED index. This allows inserts before a range.

• InnoDB: When FOREIGN_KEY_CHECKS=0, ALTER TABLE and RENAME TABLE will ignore any type incompatibilities between referencing and referenced columns. Thus, it will be possible to convert the character sets of columns that participate in a foreign key. Be sure to convert all tables before modifying any data! (Bug #9802)

• Provide more informative error messages in clustered setting when a query is issued against a table that has been modified by another mysqld server. (Bug #6762)

• Added ENGINE=MyISAM table option when creating mysql.proc table in mysql_create_system_tables script to make sure the table is created as a MyISAM table even if the default storage engine has been changed. (Bug #9496)

• SHOW CREATE TABLE for an INFORMATION_SCHEMA table no longer prints a MAX_ROWS value because the value has no meaning. (Bug #8941)

• Invalid DEFAULT values for CREATE TABLE now generate errors. (Bug #5902)

• Added --show-table-type option to mysqlshow, to display a column indicating the table type, as in SHOW FULL TABLES. (Bug #5036)

• The way the time zone information is stored in the binary log was changed, so that it is now possible to have a replication master and slave running with different global time zones. A drawback is that replication from 5.0.4 masters to pre-5.0.4 slaves is impossible.

• Added --with-big-tables compilation option to configure. (Previously it was necessary to pass -DBIG_TABLES to the compiler manually in order to enable large table support.) See Section 2.8.2, “Typical configure Options” for details.

• New configuration directives !include and !includedir implemented for including option files and searching directories for option files. See Section 4.3.2, “Using Option Files” for usage.

• The use of XOR together with NOT ISNULL() erroneously resulted in some outer joins being converted to inner joins by the optimizer. (Bug #9017)

• Fixed an optimizer problem where extraneous comparisons between NULL values in indexed columns were being done for operators such as = that are never true for NULL. (Bug #8877)

• Fixed the client/server protocol for prepared statements so that reconnection works properly when the connection is killed while reconnect is enabled. (Bug #8866)

• A server installed as a Windows service and started with --shared-memory could not be stopped. (Bug #9665)

• Fixed a server crash resulting from multiple executions of a prepared statement involving a join of an INFORMATION_SCHEMA table with another table. (Bug #9383)

• Fixed utf8_spanish2_ci and ucs2_spanish2_ci collations to not consider ‘r’ equal to ‘rr’. If you upgrade to this version from an earlier version, you should rebuild the indexes of affected tables. (Bug #9269)

• mysqldump dumped core when invoked with --tmp and --single-transaction options and a non-existent table name. (Bug #9175)

• Allow extra HKSCS and cp950 characters (big5 extension characters) to be accepted in big5 columns. (Bug #9357)

• mysql.server no longer uses non-portable alias command or LSB functions. (Bug #9852)

• Fixed a server crash resulting from GROUP BY on a decimal expression. (Bug #9210)

• In prepared statements, subqueries containing parameters were erroneously treated as const tables during preparation, resulting in a server crash. (Bug #8807)

• InnoDB: ENUM and SET columns were treated incorrectly as character strings. This bug did not manifest itself with latin1 collations if there were less than about 100 elements in an ENUM, but it caused malfunction with UTF-8. Old tables will continue to work. In new tables, ENUM and SET will be internally stored as unsigned integers. (Bug #9526)

• InnoDB: Avoid test suite failures caused by a locking conflict between two server instances at server shutdown/startup. This conflict on advisory locks appears to be the result of a bug in the operating system; these locks should be released when the files are closed, but somehow that does not always happen immediately in Linux. (Bug #9381)

• InnoDB: True VARCHAR: InnoDB stored the 'position' of a row wrong in a column prefix primary key index; this could cause MySQL to complain ERROR 1032: Can't find record … in an update of the primary key, and also some ORDER BY or DISTINCT queries. (Bug #9314)

• InnoDB: Fix bug in MySQL/InnoDB 5.0.3: SQL statements were not rolled back on error. (Bug #8650)

• Fixed a Commands out of sync error when two prepared statements for single-row result sets were open simultaneously. (Bug #8880)

• Fixed a server crash after a call to mysql_stmt_close() for single-row result set. (Bug #9159)

• Fixed server crashes for CREATE TABLE ... SELECT or INSERT INTO ... SELECT when selecting from multiple-table view. (Bug #8703, Bug #9398)

• TRADITIONAL SQL mode should prevent inserts where a column with no default value is omitted or set to a value of DEFAULT. Fixed cases where this restriction was not enforced. (Bug #5986)

• Fixed a server crash when creating a PRIMARY KEY for a table, if the table contained a BIT column. (Bug #9571)

• Warning message from GROUP_CONCAT() did not always indicate correct number of lines. (Bug #8681)

• The commit count cache for NDB was not properly invalidated when deleting a record using a cursor. (Bug #8585)

• Fixed option-parsing code for the embedded server to understand K, M, and G suffixes for the net_buffer_length and max_allowed_packet options. (Bug #9472)

• Selecting a BIT column failed if the binary client/server protocol was used. (Bug #9608)

• Fixed a permissions problem whereby information in INFORMATION_SCHEMA could be exposed to a user with insufficient privileges. (Bug #7214)

• An error now occurs if you try to insert an invalid value via a stored procedure in STRICT mode. (Bug #5907)

• Link with libsupc++ on Fedora Core 3 to get language support functions. (Bug #6554)

• The value of the CHARACTER_MAXIMUM_LENGTH and CHARACTER_OCTET_LENGTH columns of the INFORMATION_SCHEMA.COLUMNS table must be NULL for numeric columns, but were not. (Bug #9344)

• DROP TABLE did not drop triggers that were defined for the table. DROP DATABASE did not drop triggers in the database. (Bug #5859, Bug #6559)

• CREATE OR REPLACE VIEW and ALTER VIEW now require the CREATE VIEW and DROP privileges, not CREATE VIEW and DELETE. (DELETE is a row-level privilege, not a table-level privilege.) (Bug #9260)

• Some user variables were not being handled with “implicit” coercibility. (Bug #9425)

• Setting the max_error_count system variable to 0 resulted in a setting of 1. (Bug #9072)

• Fixed a collation coercibility problem that caused a union between binary and non-binary columns to fail. (Bug #6519)

• Fixed a bug in division of floating point numbers. It could cause nine zeroes (000000000) to be inserted in the middle of the quotient. (Bug #9501)

• INFORMATION_SCHEMA tables had an implicit upper limit for the number of rows. As a result, not all data could be returned for some queries. (Bug #9317)

• Fixed a problem with the tee command in mysql that resulted in mysql crashing. (Bug #8499)

• CAST() now produces warnings when casting incorrect INTEGER and CHAR values. This also applies to implicit string to number casts. (Bug #5912)

• ALTER TABLE now fails in STRICT mode if the alteration generates warnings.

• Using CONVERT('0000-00-00',date) or CAST('0000-00-00' as date) in TRADITIONAL SQL mode now produces a warning. (Bug #6145)

• Inserting a zero date in a DATE, DATETIME or TIMESTAMP column during TRADITIONAL mode now produces an error. (Bug #5933)

• Inserting a zero date into a DATETIME column in TRADITIONAL mode now produces an error.

• STR_TO_DATE() now produces errors in strict mode (and warnings otherwise) when given an illegal argument. (Bug #5902)

• Fixed a problem with ORDER BY that sometimes caused incorrect sorting of utf8 data. (Bug #9309)

• Fixed server crash resulting from queries that combined SELECT DISTINCT, SUM(), and ROLLUP. (Bug #8615)

• Incorrect results were returned from queries that combined SELECT DISTINCT, GROUP BY , and ROLLUP. (Bug #8616)

• Too many rows were returned from queries that combined ROLLUP and LIMIT if SQL_CALC_FOUND_ROWS was given. (Bug #8617)

• If on replication master a LOAD DATA INFILE is interrupted in the middle (integrity constraint violation, killed connection...), the slave used to skip this LOAD DATA INFILE entirely, thus missing some changes if this command permanently inserted/updated some table records before being interrupted. This is now fixed. (Bug #3247)

• Security improvement: The server creates .frm, .MYD, .MYI, .MRG, .ISD, and .ISM table files only if a file with the same name does not already exist. Thanks to Stefano Di Paola <stefano.dipaola@wisec.it> for finding and informing us about this issue. (CAN-2005-0711)

• Security improvement: User-defined functions should have at least one symbol defined in addition to the xxx symbol that corresponds to the main xxx() function. These auxiliary symbols correspond to the xxx_init(), xxx_deinit(), xxx_reset(), xxx_clear(), and xxx_add() functions. mysqld by default no longer loads UDFs unless they have at least one auxiliary symbol defined in addition to the main symbol. The --allow-suspicious-udfs option controls whether UDFs that have only an xxx symbol can be loaded. By default, the option is off. mysqld also checks UDF filenames when it reads them from the mysql.func table and rejects those that contain directory pathname separator characters. (It already checked names as given in CREATE FUNCTION statements.) See Section 25.2.3.1, “UDF Calling Sequences for Simple Functions”, Section 25.2.3.2, “UDF Calling Sequences for Aggregate Functions”, and Section 25.2.3.6, “User-Defined Function Security Precautions”. Thanks to Stefano Di Paola <stefano.dipaola@wisec.it> for finding and informing us about this issue. (CAN-2005-0709, CAN-2005-0710)

• InnoDB: Upgrading from 4.1: The sorting order for end-space in TEXT columns for InnoDB tables has changed. Starting from 5.0.3, InnoDB compares TEXT columns as space-padded at the end. If you have a non-unique index on a TEXT column, you should run CHECK TABLE on it, and run OPTIMIZE TABLE if the check reports errors. If you have a UNIQUE INDEX on a TEXT column, you should rebuild the table with OPTIMIZE TABLE.

• Implemented support for XA transactions. See Section 13.4.7, “XA Transactions”. The implementation make the innodb_safe_binlog system variable obsolete, so it has been removed.

• mysqlbinlog now prints a ROLLBACK statement at the end of its output, in case the server crashed while it was in the process of writing the final entry into the last binary log named on the command line. This causes any half-written transaction to be rolled back when the output is executed. The ROLLBACK is harmless if the binary log file was written and closed normally.

• Added the engine_condition_pushdown system variable. For NDB, setting this variable to 1 allows processing of some WHERE clause conditions to be processed in NDB nodes before rows are sent to the MySQL server, rather than having rows sent to the server for evaluation.

• Additional control over transaction completion was implemented. The COMMIT and ROLLBACK statements support AND [NO] CHAIN and RELEASE clauses. There is a new RELEASE SAVEPOINT statement. The completion_type system variable was added for setting the global and session default completion type.

• A new CREATE USER privilege was added.

• my.cnf in the compile-time datadir (usually /usr/local/mysql/data/ in the binary tarball distributions) is not being read anymore. The value of the environment variable MYSQL_HOME is used instead of the hard-coded path.

• Support for the ISAM storage engine has been removed. If you have ISAM tables, you should convert them before upgrading. See Section 2.10.2, “Upgrading from Version 4.1 to 5.0”.

• Support for RAID options in MyISAM tables has been removed. If you have tables that use these options, you should convert them before upgrading. See Section 2.10.2, “Upgrading from Version 4.1 to 5.0”.

• Added support for AVG(DISTINCT).

• ONLY_FULL_GROUP_BY no longer is included in the ANSI composite SQL mode. (Bug #8510)

• mysqld_safe will create the directory where the UNIX socket file is to be located if the directory does not exist. This applies only to the last component of the directory pathname. (Bug #8513)

• The coercibility for the return value of functions such as USER() or VERSION() now is “system constant” rather than “implicit.” This makes these functions more coercible than column values so that comparisons of the two do not result in Illegal mix of collations errors. COERCIBILITY() was modified to accommodate this new coercibility value. See Section 12.9.3, “Information Functions”.

• User variable coercibility has been changed from “coercible” to “implicit.” That is, user variables have the same coercibility as column values.

• Boolean full-text phrase searching now requires only that matches contain exactly the same words as the phrase and in the same order. Non-word characters no longer need match exactly.

• CHECKSUM TABLE returns a warning for non-existing tables. The checksum value remains NULL as before. (Bug #8256)

• The server now includes a timestamp in the Ready for connections message that is written to the error log at startup. (Bug #8444)

• Added SQL_NOTES session variable to cause Note-level warnings not to be recorded. (Bug #6662)

• Allowed the service-installation command for Windows servers to specify a single option other than --defaults-file following the service name. This is for compatibility with MySQL 4.1. (Bug #7856)

• InnoDB: Commit after every 10,000 copied rows when executing ALTER TABLE, CREATE INDEX, DROP INDEX or OPTIMIZE TABLE. This makes it much faster to recover from an aborted operation.

• Added VAR_POP() and STDDEV_POP() as standard SQL aliases for the VARIANCE() and STDDEV() functions that compute population variance and standard deviation. Added new VAR_SAMP() and STDDEV_SAMP() functions to compute sample variance and standard deviation. (Bug #3190)

• Fixed a problem with out-of-order packets being sent (ERROR after OK or EOF) following a KILL QUERY statement. (Bug #6804)

• Retrieving from a view defined as a SELECT that mixed UNION ALL and UNION DISTINCT resulted in a different result than retrieving from the original SELECT. (Bug #6565)

• Fixed a problem with non-optimal index_merge query execution plans being chosen on IRIX. (Bug #8578)

• BIT in column definitions now is a distinct data type; it no longer is treated as a synonym for TINYINT(1).

• Bit-field values can be written using b'value' notation. value is a binary value written using 0s and 1s.

• From the Windows distribution, predefined accounts without passwords for remote users ("root@%", "@%") were removed (other distributions never had them).

• Added mysql_library_init() and mysql_library_end() as synonyms for the mysql_server_init() and mysql_server_end() C API functions. mysql_library_init() and mysql_library_end() are #define symbols, but the names more clearly indicate that they should be called when beginning and ending use of a MySQL C API library no matter whether the application uses libmysqlclient or libmysqld. (Bug #6149)

• SHOW COLUMNS now displays NO rather than blank in the Null output column if the corresponding table column cannot be NULL.

• Changed XML format for mysql from <col_name>col_value</col_name> to <field name="col_name">col_value</field> to allow for proper encoding of column names that are not legal as element names. (Bug #7811)

• Added --innodb-checksums and --innodb-doublewrite options for mysqld.

• Added --large-pages option for mysqld.

• Added multi_read_range system variable.

• SHOW DATABASES, SHOW TABLES, SHOW COLUMNS, and so forth display information about the INFORMATION_SCHEMA database. Also, several SHOW statements now accept a WHERE clause specifying which output rows to display. See Chapter 21, The INFORMATION_SCHEMA Information Database.

• Added the CREATE ROUTINE and ALTER ROUTINE privileges, and made the EXECUTE privilege operational.

• InnoDB: Corrected a bug in the crash recovery of ROW_FORMAT=COMPACT tables that caused corruption. (Bug #7973) There may still be bugs in the crash recovery, especially in COMPACT tables.

• When the MyISAM storage engine detects corruption of a MyISAM table, a message describing the problem now is written to the error log.

• InnoDB: When MySQL/InnoDB is compiled on Mac OS X 10.2 or earlier, detect the operating system version at run time and use the fcntl() file flush method on Mac OS X versions 10.3 and later. In Mac OS X, fsync() does not flush the write cache in the disk drive, but the special fcntl() does; however, the flush request is ignored by some external devices. Failure to flush the buffers may cause severe database corruption at power outages.

• InnoDB: Implemented fast TRUNCATE TABLE. The old approach (deleting rows one by one) may be used if the table is being referenced by foreign keys. (Bug #7150)

• Added cp932 (SJIS for Windows Japanese) and eucjpms (UJIS for Windows Japanese) character sets.

• Added several InnoDB status variables. See Section 5.3.4, “Server Status Variables”.

• Added the FEDERATED storage engine. See Section 14.6, “The FEDERATED Storage Engine”.

• SHOW CREATE TABLE now uses USING index_type rather than TYPE index_type to specify an index type. (Bug #7233)

• InnoDB now supports a fast TRUNCATE TABLE. One visible change from this is that auto-increment values for this table are reset on TRUNCATE.

• Added an error member to the MYSQL_BIND data structure that is used in the C API for prepared statements. This member is used for reporting data truncation errors. Truncation reporting is enabled via the new MYSQL_REPORT_DATA_TRUNCATION option for the mysql_options() C API function.

• API change: the reconnect flag in the MYSQL structure is now set to 0 by mysql_real_connect(). Only those client programs which didn't explicitly set this flag to 0 or 1 after mysql_real_connect() experience a change. Having automatic reconnection enabled by default was considered too dangerous (after reconnection, table locks, temporary tables, user and session variables are lost).

• FLUSH TABLES WITH READ LOCK is now killable while it's waiting for running COMMIT statements to finish.

• MEMORY (HEAP) can have VARCHAR() fields.

• VARCHAR columns now remember end space. A VARCHAR() column can now contain up to 65535 bytes. For more details, see Section D.1, “Changes in release 5.0.x (Production)”. If the table handler doesn't support the new VARCHAR type, then it's converted to a CHAR column. Currently this happens for NDB tables.

• InnoDB: Introduced a compact record format that does not store the number of columns or the lengths of fixed-size columns. The old format can be requested by specifying ROW_FORMAT=REDUNDANT. The new format (ROW_FORMAT=COMPACT) is the default. The new format typically saves 20 % of disk space and memory.

• InnoDB: Setting the initial AUTO_INCREMENT value for an InnoDB table using CREATE TABLE ... AUTO_INCREMENT = n now works, and ALTER TABLE ... AUTO_INCREMENT = n resets the current value.

• Seconds_Behind_Master is NULL (which means “unknown”) if the slave SQL thread is not running, or if the slave I/O thread is not running or not connected to master. It is zero if the SQL thread has caught up to the I/O thread. It no longer grows indefinitely if the master is idle.

• The MySQL server aborts immediately instead of simply issuing a warning if it is started with the --log-bin option but cannot initialize the binary log at startup (that is, an error occurs when writing to the binary log file or binary log index file).

• The binary log file and binary log index file now are handled the same way as MyISAM tables when there is a “disk full” or “quota exceeded” error. See Section A.4.3, “How MySQL Handles a Full Disk”.

• The MySQL server now aborts when started with the option --log-bin-index and without --log-bin, and when started with --log-slave-updates and without --log-bin.

• If the MySQL server is started without an argument to --log-bin and without --log-bin-index, thus not providing a name for the binary log index file, a warning is issued because MySQL falls back to using the hostname for that name, and this is prone to replication issues if the server's hostname's gets changed later. See Section A.8.1, “Open Issues in MySQL”.

• Added account-specific MAX_USER_CONNECTIONS limit, which allows you to specify the maximum number of concurrent connections for the account. Also, all limited resources now are counted per account (instead of being counted per user + host pair as it was before). Use the --old-style-user-limits option to get the old behavior.

• InnoDB: A shared record lock (LOCK_REC_NOT_GAP) is now taken for a matching record in the foreign key check because inserts can be allowed into gaps.

• InnoDB: Relaxed locking in INSERT…SELECT, single table UPDATE…SELECT and single table DELETE…SELECT clauses when innodb_locks_unsafe_for_binlog is used and isolation level of the transaction is not serializable. InnoDB uses consistent read in these cases for a selected table.

• Added a new global system variable slave_transaction_retries: if the replication slave SQL thread fails to execute a transaction because of an InnoDB deadlock or exceeded InnoDB's innodb_lock_wait_timeout or NDBCluster's TransactionDeadlockDetectionTimeout or TransactionInactiveTimeout, it automatically retries slave_transaction_retries times before stopping with an error. The default is 10. (Bug #8325)

• When a client releases a user-level lock, DO RELEASE_LOCK() will not be written to the binary log anymore (this makes the binary log smaller); as a counterpart, the slave does not actually take the lock when it executes GET_LOCK(). This is mainly an optimization and should not affect existing setups. (Bug #7998)

• The way the character set information is stored into the binary log was changed, so that it's now possible to have a replication master and slave running with different global character sets. A drawback is that replication from 5.0.3 masters to pre-5.0.3 slaves is impossible.

• The LOAD DATA statement was extended to support user variables in the target column list, and an optional SET clause. Now one can perform some transformations on data after they have been read and before they are inserted into the table. For example:

  LOAD DATA INFILE 'file.txt'
    INTO TABLE t1
    (column1, @var1)
    SET column2 = @var1/100;
  

  Also, replication of LOAD DATA was changed, so you can't replicate such statements from a 5.0.3 master to pre-5.0.3 slaves.

• NDB Cluster: When using this storage engine, the output of SHOW TABLE STATUS now displays properly-calculated values in the Avg_row_length and Data_length columns. (Note that BLOB columns are not yet taken into account.) In addition, the number of replicas is now shown in the Comment column (as number_of_replicas).

• If a MyISAM table on Windows had INDEX DIRECTORY or DATA DIRECTORY table options, mysqldump dumped the directory pathnames with single-backslash pathname separators. This would cause syntax errors when importing the dump file. mysqldump now changes ‘\’ to ‘/’ in the pathnames on Windows. (Bug #6660)

• mysql_fix_privilege_tables now fixes that the mysql privilege tables can be used in MySQL 4.1. This allows one to easily downgrade to 4.1 or run MySQL 5.0 and 4.1 with the same privilege files for testing purposes.

• Fixed bug creating user with GRANT fails with password but works without, (Bug #7905)

• mysqldump misinterpreted ‘_’ and ‘%’ characters in the names of tables to be dumped as wildcard characters. (Bug #9123)

• The definition of the enumeration-valued sql_mode column of the mysql.proc table was missing some of the current allowable SQL modes, so stored routines would not necessarily execute with the SQL mode in effect at the time of routine definition. (Bug #8902)

• REPAIR TABLE did not invalidate query results in the query cache that were generated from the table. (Bug #8480)

• In strict or traditional SQL mode, too-long string values assigned to string columns (CHAR, VARCHAR, BINARY, VARBINARY, TEXT, or BLOB) were correctly truncated, but the server returned an SQLSTATE value of 01000 (should be 22001). (Bug #6999, Bug #9029)

• Stored functions that used cursors could return incorrect results. (Bug #8386)

• AES_DECRYPT(col_name,key) could fail to return NULL for invalid values in col_name, if col_name was declared as NOT NULL. (Bug #8669)

• Ordering by unsigned expression (more complex than a column reference) was treating the value as signed, producing incorrectly sorted results. (Bug #7425)

• HAVING was treating unsigned columns as signed. (Bug #7425)

• Fixed a problem with boolean full-text searches on utf8 columns where a double quote in the search string caused a server crash. (Bug #8351)

• For a query with both GROUP BY and COUNT(DISTINCT) clauses and a FROM clause with a subquery, NULL was returned for any VARCHAR column selected by the subquery. (Bug #8218)

• Fixed a bug in TRUNCATE, which did not work within stored procedures. A workaround has been made so that within stored procedures, TRUNCATE is executed like DELETE. This was necessary because TRUNCATE is implicitly locking tables. (Bug #8850)

• Fixed an optimizer bug that caused incorrectly ordered result from a query that used a FULLTEXT index to retrieve rows and there was another index that was usable for ORDER BY. For such a query, EXPLAIN showed fulltext join type, but regular (not FULLTEXT) index in the Key column. (Bug #6635)

• If SELECT DISTINCT named an index column multiple times in the select list, the server tried to access different key fields for each instance of the column, which could result in a crash. (Bug #8532)

• For a stored function that refers to a given table, invoking the function while selecting from the same table resulted in a server crash. (Bug #8405)

• Comparison of a DECIMAL column containing NULL to a subquery that produced DECIMAL values resulted in a server crash. (Bug #8397)

• The --set-character-set option for myisamchk was changed to --set-collation. The value needed for specifying how to sort indexes is a collation name, not a character set name. (Bug #8349)

• Hostname matching didn't work if a netmask was specified for table-specific privileges. (Bug #3309)

• Corruption of MyISAM table indexes could occur with TRUNCATE TABLE if the table had already been opened. For example, this was possible if the table had been opened implicitly by selecting from a MERGE table that mapped to the MyISAM table. The server now issues an error message for TRUNCATE TABLE under these conditions. (Bug #8306)

• Setting the connection collation to a value different from the server collation followed by a CREATE TABLE statement that included a quoted default value resulted in a server crash. (Bug #8235)

• Fixed handling of table-name matching in mysqlhotcopy to accommodate DBD::mysql 2.9003 and up (which implement identifier quoting). (Bug #8136)

• Selecting from a view defined as a join caused a server crash if the query cache was enabled. (Bug #8054)

• Results in the query cache generated from a view were not properly invalidated after ALTER VIEW or DROP VIEW on that view. (Bug #8050)

• FOUND_ROWS() returned an incorrect value after a SELECT SQL_CALC_FOUND_ROWS DISTINCT statement that selected constants and included GROUP BY and LIMIT clauses. (Bug #7945)

• Selecting from an INFORMATION_SCHEMA table combined with a subselect on an INFORMATION_SCHEMA table caused an error with the message Table tbl_name is corrupted. (Bug #8164)

• Fixed a problem with equality propagation optimization for prepared statements and stored procedures that caused a server crash upon re-execution of the prepared statement or stored procedure. (Bug #8115, Bug #8849)

• LEFT OUTER JOIN between an empty base table and a view on an empty base table caused a server crash. (Bug #7433)

• Use of GROUP_CONCAT() in the select list when selecting from a view caused a server crash. (Bug #7116)

• Use of a view in a correlated subquery that contains HAVING but no GROUP BY caused a server crash. (Bug #6894)

• Handling by mysql_list_fields() of references to stored functions within views was incorrect and could result in a server crash. (Bug #6814)

• mysqldump now avoids writing SET NAMES to the dump output if the server is older than version 4.1 and would not understand that statement. (Bug #7997)

• Fixed problems when selecting from a view that had an EXISTS or NOT EXISTS subquery. Selecting columns by name caused a server crash. With SELECT *, a crash did not occur, but columns in outer query were not resolved properly. (Bug #6394)

• DDL statements for views were not being written to the binary log (and thus not subject to replication). (Bug #4838)

• The CHAR() function was not ignoring NULL arguments, contrary to the documentation. (Bug #6317)

• Creating a table using a name containing a character that is illegal in character_set_client resulted in the character being stripped from the name and no error. The character now is considered an error. (Bug #8041)

• Fixed a problem with the Cyrillic letters I and SHORT I being treated the same by the utf8_general_ci collation. (Bug #8385)

• Some INFORMATION_SCHEMA columns that contained catalog identifiers were of type LONGTEXT. These were changed to VARCHAR(N, where N is the appropriate maximum identifier length. (Bug #7215)

• Some INFORMATION_SCHEMA columns that contained timestamp values were of type VARBINARY. These were changed to TIMESTAMP. (Bug #7217)

• An expression that tested a case-insensitive character column against string constants that differed in lettercase could fail because the constants were treated as having a binary collation. (For example, WHERE city='London' AND city='london' could fail.) (Bug #7098, Bug #8690)

• The output of the STATUS (\s) command in mysql had the values for the server and client character sets reversed. (Bug #7571)

• If the slave was running with --replicate-*-table options which excluded one temporary table and included another, and the two tables were used in a single DROP TEMPORARY TABLE IF EXISTS statement, as the ones the master automatically writes to its binary log upon client's disconnection when client has not explicitly dropped these, the slave could forget to delete the included replicated temporary table. Only the slave needs to be upgraded. (Bug #8055)

• When setting integer system variables to a negative value with SET VARIABLES, the value was treated as a positive value modulo 2³². (Bug #6958)

• Corrected a problem with references to DUAL where statements such as SELECT 1 AS a FROM DUAL would succeed but statements such as SELECT 1 AS a FROM DUAL LIMIT 1 would fail. (Bug #8023)

• Fixed a server crash caused by DELETE FROM tbl_name ... WHERE ... ORDER BY tbl_name.col_name when the ORDER BY column was qualified with the table name. (Bug #8392)

• Fixed a bug in MATCH ... AGAINST in natural language mode that could cause a server crash if the FULLTEXT index was not used in a join (EXPLAIN did not show fulltext join mode) and the search query matched no rows in the table (Bug #8522).

• InnoDB: Honor the --tmpdir startup option when creating temporary files. Previously, InnoDB temporary files were always created in the temporary directory of the operating system. On Netware, InnoDB will continue to ignore --tmpdir. (Bug #5822)

• Platform and architecture information in version information produced for --version option on Windows was always Win95/Win98 (i32). More accurately determine platform as Win32 or Win64 for 32-bit or 64-bit Windows, and architecture as ia32 for x86, ia64 for Itanium, and axp for Alpha. (Bug #4445)

• If multiple semicolon-separated statements were received in a single packet, they were written to the binary log as a single event rather than as separate per-statement events. For a server serving as a replication master, this caused replication to fail when the event was sent to slave servers. (Bug #8436)

• Fixed LOAD INDEX statement to actually load index in memory. (Bug #8452)

• Fixed a failure of multiple-table updates to replicate properly on slave servers when --replicate-*-table options had been specified. (Bug #7011)

• Fixed failure of CREATE TABLE ... LIKE Windows when the source or destination table was located in a symlinked database directory. (Bug #6607)

• With lower_case_table_names set to 1, mysqldump on Windows could write the same table name in different lettercase for different SQL statements. Fixed so that consistent lettercase is used. (Bug #5185)

• mysqld_safe now understands the --help option. Previously, it ignored the option and attempted to start the server anyway. (Bug #7931)

• Fixed problem in NO_BACKSLASH_ESCAPES SQL mode for strings that contained both the string quoting character and backslash. (Bug #6368)

• Fixed some portability issues with overflow in floating point values.

• Prepared statements now gives warnings on prepare.

• Fixed bug in prepared statements with SUM(DISTINCT...).

• Fixed bug in prepared statements with OUTER JOIN.

• Fixed a bug in CONV() function returning unsigned BIGINT number (third argument is positive, and return value does not fit in 32 bits). (Bug #7751)

• Fixed a failure of the IN() operator to return correct result if all values in the list were constants and some of them were using substring functions, for example, LEFT(), RIGHT(), or MID(). (Bug #7716)

• Fixed a crash in CONVERT_TZ() function when its second or third argument was from a const table (see Section 7.2.1, “EXPLAIN Syntax (Get Information About a SELECT)”). (Bug #7705)

• Fixed a problem with calculation of number of columns in row comparison against subquery. (Bug #8020)

• Fixed erroneous output resulting from SELECT DISTINCT combined with a subquery and GROUP BY. (Bug #7946)

• Fixed server crash in comparing a nested row expression (for example row(1,(2,3))) with a subquery. (Bug #8022)

• Fixed server crash resulting from certain correlated subqueries with forward references (references to an alias defined later in the outer query). (Bug #8025)

• Fixed server crash resulting from re-execution of prepared statements containing subqueries. (Bug #8125)

• Fixed a bug where ALTER TABLE improperly would accept an index on a TIMESTAMP column that CREATE TABLE would reject. (Bug #7884)

• SHOW CREATE TABLE now reports ENGINE=MEMORY rather than ENGINE=HEAP for a MEMORY table (unless the MYSQL323 SQL mode is enabled). (Bug #6659)

• Fixed a bug where the use of GROUP_CONCAT() with HAVING caused a server crash. (Bug #7769)

• Fixed a bug where comparing the result of a subquery to a non-existent column caused a server crash on Windows. (Bug #7885)

• Fixed a bug in a combination of -not and trunc* operators of full-text search. Using more than one truncated negative search term, was causing empty result set.

• InnoDB: Corrected the handling of trailing spaces in the ucs2 character set. (Bug #7350, Bug #8771)

• InnoDB: Use native tmpfile() function on Netware. All InnoDB temporary files are created under sys:\tmp. Previously, InnoDB temporary files were never deleted on Netware.

• Fixed a bug in max_heap_table_size handling, that resulted in Table is full error when the table was still smaller than the limit. (Bug #7791).

• Fixed a symlink vulnerability in the mysqlaccess script. Reported by Javier Fernandez-Sanguino Pena and Debian Security Audit Team. (CAN-2005-0004)

• Fixed a bug that caused server crash if some error occured during filling of temporary table created for derived table or view handling. (Bug #7413)

• Fixed a bug which caused server crash if query containing CONVERT_TZ() function with constant arguments was prepared. (Bug #6849)

• Prevent adding CREATE TABLE .. SELECT query to the binary log when the insertion of new records partially failed. (Bug #6682)

• Fixed a bug which caused a crash when only the slave I/O thread was stopped and started. (Bug #6148)

• Giving mysqld a SIGHUP caused it to crash.

• Changed semantics of CREATE/ALTER/DROP DATABASE statements so that replication of CREATE DATABASE is possible when using --binlog-do-db and --binlog-ignore-db. (Bug #6391)

• A sequence of BEGIN (or SET AUTOCOMMIT=0), FLUSH TABLES WITH READ LOCK, transactional update, COMMIT, FLUSH TABLES WITH READ LOCK could hang the connection forever and possibly the MySQL server itself. This happened for example when running the innobackup script several times. (Bug #6732)

• mysqlbinlog did not print SET PSEUDO_THREAD_ID statements in front of LOAD DATA INFILE statements inserting into temporary tables, thus causing potential problems when rolling forward these statements after restoring a backup. (Bug #6671)

• InnoDB: Fixed a bug no error message for ALTER with InnoDB and AUTO_INCREMENT (Bug #7061). InnoDB now supports ALTER TABLE...AUTO_INCREMENT = x query to set auto increment value for a table.

• Made the MySQL server accept executing SHOW CREATE DATABASE even if the connection has an open transaction or locked tables; refusing it made mysqldump --single-transaction sometimes fail to print a complete CREATE DATABASE statement for some dumped databases. (Bug #7358)

• Fixed that, when encountering a “disk full” or “quota exceeded” write error, MyISAM sometimes didn't sleep and retry the write, thus resulting in a corrupted table. (Bug #7714)

• Fixed that --expire-log-days was not honored if using only transactions. (Bug #7236)

• Fixed that a slave could crash after replicating many ANALYZE TABLE, OPTIMIZE TABLE, or REPAIR TABLE statements from the master. (Bug #6461, Bug #7658)

• mysqlbinlog forgot to add backquotes around the collation of user variables (causing later parsing problems as BINARY is a reserved word). (Bug #7793)

• Ensured that mysqldump --single-transaction sets its transaction isolation level to REPEATABLE READ before proceeding (otherwise if the MySQL server was configured to run with a default isolation level lower than REPEATABLE READ it could give an inconsistent dump). (Bug #7850)

• Fixed that when using the RPAD() function (or any function adding spaces to the right) in a query that had to be resolved by using a temporary table, all resulting strings had rightmost spaces removed (i.e. RPAD() did not work) (Bug #4048)

• Fixed that a 5.0.3 slave can connect to a master < 3.23.50 without hanging (the reason for the hang is a bug in these quite old masters -- SELECT @@unknown_var hangs them -- which was fixed in MySQL 3.23.50). (Bug #7965)

• InnoDB: Fixed a deadlock without any locking, simple select and update (Bug #7975). InnoDB now takes an exclusive lock when INSERT ON DUPLICATE KEY UPDATE is checking duplicate keys.

• Fixed a bug where MySQL was allowing concurrent updates (inserts, deletes) to a table if binary logging is enabled. Changed to ensure that all updates are executed in a serialized fashion, because they are executed serialized when binlog is replayed. (Bug #7879)

• Fixed a rare race condition which could lead to FLUSH TABLES WITH READ LOCK hanging. (Bug #8682)

• Fixed a bug in replication that caused the master to stamp generated statements (such as SET commands) with an error_code intended only for another statement. This could happen, for example, when a statements generates a duplicate key error on the master but must be replicated. (Bug #8412)

• Warning: Incompatible change! The precedence of NOT operator has changed so that expressions such as NOT a BETWEEN b AND c are parsed correctly as NOT (a BETWEEN b AND c) rather than as (NOT a) BETWEEN b AND c. The pre-5.0 higher-precedence behavior can be obtained by enabling the new HIGH_NOT_PRECEDENCE SQL mode.

• SHOW STATUS now shows the thread specific status variables and SHOW GLOBAL STATUS shows the status variables for the whole server.

• Added support for the INFORMATION_SCHEMA “information database” that provides database metadata. See Chapter 21, The INFORMATION_SCHEMA Information Database.

• A HAVING clause in a SELECT statement now can refer to columns in the GROUP BY clause, as required by standard SQL.

• Added the CREATE USER and RENAME USER statements.

• Modify DROP USER so that it drops the account, including all its privileges. Formerly, it removed the account record only for an account that had had all privileges revoked.

• Added IS [NOT] boolean_value syntax, where boolean_value is TRUE, FALSE, or UNKNOWN.

• Added several InnoDB status variables. See Section 5.3.4, “Server Status Variables”.

• Implemented the WITH CHECK OPTION clause for CREATE VIEW.

• CHECK TABLE now works for views.

• The SCHEMA and SCHEMAS keywords are now accepted as synonyms for DATABASE and DATABASES.

• Added initial support for rudimentary triggers (the CREATE TRIGGER and DROP TRIGGER statements).

• Added basic support for read-only server side cursors.

• mysqldump --single-transaction --master-data is now able to take an online (non-blocking) dump of InnoDB and report the corresponding binary log coordinates, which makes a backup suitable for point-in-time recovery, roll-forward or replication slave creation. See Section 8.8, “mysqldump — A Database Backup Program”.

• Added --start-datetime, --stop-datetime, --start-position, --stop-position options to mysqlbinlog (makes point-in-time recovery easier).

• Made the MySQL server not react to signals SIGHUP and SIGQUIT on Mac OS X 10.3. This is needed because under this OS, the MySQL server receives lots of these signals (reported as Bug #2030).

• New --auto-increment-increment and --auto-increment-offset startup options. These allow you to set up a server to generate auto-increment values that don't conflict with another server.

• MySQL now by default checks dates and in strict mode allows only fully correct dates. If you want MySQL to behave as before, you should enable the new ALLOW_INVALID_DATES SQL mode.

• Added STRICT_TRANS_TABLES, STRICT_ALL_TABLES, NO_ZERO_IN_DATE, NO_ZERO_DATE, ERROR_FOR_DIVISION_BY_ZERO, and TRADITIONAL SQL modes. The TRADITIONAL mode is shorthand for all the preceding modes. When using mode TRADITIONAL, MySQL generates an error if you try to insert a wrong value in a column. It does not adjust the value to the closest possible legal value.

• MySQL now remembers which columns were declared to have default values. In STRICT_TRANS_TABLES/STRICT_ALL_TABLES mode, you now get an error if you do an INSERT without specifying all columns that don't have a default value. A side effect of this is that when you do SHOW CREATE for a new table, you no longer see a DEFAULT value for a column for which you didn't specify a default value.

• The compilation flag DONT_USE_DEFAULT_FIELDS was removed because you can get the same behavior by setting the sql_mode system variable to STRICT_TRANS_TABLES.

• Added NO_AUTO_CREATE_USER SQL mode to prevent GRANT from automatically creating new users if it would otherwise do so, unless a password also is specified.

• We now detect too-large floating point numbers during statement parsing and generate an error messages for them.

• Renamed the sql_updatable_view_key system variable to updatable_views_with_limit. This variable now can have only two values:

  • 1 or YES: Don't issue an error message (warning only) if a VIEW without presence of a key in the underlying table is used in queries with a LIMIT clause for updating. (This is the default value.)

  • 0 or NO: Prohibit update of a VIEW, which does not contain a key in the underlying table and the query uses a LIMIT clause (usually get from GUI tools).

• Reverted output format of SHOW TABLES to old pre-5.0.1 format that did not include a table type column. To get the additional column that lists the table type, use SHOW FULL TABLES now.

• The mysql_fix_privilege_tables script now initializes the global CREATE VIEW and SHOW VIEW privileges in the user table to the value of the CREATE privilege in that table.

• If the server finds that the user table has not been upgraded to include the view-related privilege columns, it treats each account as having view privileges that are the same as its CREATE privilege.

• InnoDB: If you specify the option innodb_locks_unsafe_for_binlog in my.cnf, InnoDB in an UPDATE or a DELETE only locks the rows that it updates or deletes. This greatly reduces the probability of deadlocks.

• A connection doing a rollback now displays "Rolling back" in the State column of SHOW PROCESSLIST.

• mysqlbinlog now prints an informative commented line (thread id, timestamp, server id, etc) before each LOAD DATA INFILE, like it does for other queries; unless --short-form is used.

• Two new server system variables were introduced. auto_increment_increment and auto_increment_offset can be set locally or globally, and are intended for use in controlling the behavior of AUTO_INCREMENT columns in master-to-master replication. Note that these variables are not intended to take the place of sequences. See Section 5.3.3, “Server System Variables”.

• Fixed that mysqlbinlog --read-from-remote-server sometimes couldn't accept two binary log files on the command line. (Bug #4507)

• Fixed that mysqlbinlog --position --read-from-remote-server had incorrect # at lines. (Bug #4506)

• Fixed that CREATE TABLE ... TYPE=HEAP ... AS SELECT... caused replication slave to stop. (Bug #4971)

• Fixed that mysql_options(...,MYSQL_OPT_LOCAL_INFILE,...) failed to disable LOAD DATA LOCAL INFILE. (Bug #5038)

• Fixed that disable-local-infile option had no effect if client read it from a configuration file using mysql_options(...,MYSQL_READ_DEFAULT,...). (Bug #5073)

• Fixed that SET GLOBAL SYNC_BINLOG did not work on some platforms (Mac OS X). (Bug #5064)

• Fixed that mysql-test-run failed on the rpl_trunc_binlog test if running test from the installed (the target of 'make install') directory. (Bug #5050)

• Fixed that mysql-test-run failed on the grant_cache test when run as Unix user 'root'. (Bug #4678)

• Fixed an unlikely deadlock which could happen when using KILL. (Bug #4810)

• Fixed a crash when one connection got KILLed while it was doing START SLAVE. (Bug #4827)

• Made FLUSH TABLES WITH READ LOCK block COMMIT if server is running with binary logging; this ensures that the binary log position can be trusted when doing a full backup of tables and the binary log. (Bug #4953)

• Fixed that the counter of an auto_increment column was not reset by TRUNCATE TABLE is the table was a temporary one. (Bug #5033)

• Fixed slave SQL thread so that the SET COLLATION_SERVER... statements it replicates don't advance its position (so that if it gets interrupted before the actual update query, it later redoes the SET). (Bug #5705)

• Fixed that if the slave SQL thread found a syntax error in a query (which should be rare, as the master parsed it successfully), it stops. (Bug #5711)

• Fixed that if a write to a MyISAM table fails because of a full disk or an exceeded disk quota, it prints a message to the error log every 10 minutes, and waits until disk becomes free. (Bug #3248)

• Fixed problem introduced in 4.0.21 where a connection starting a transaction, doing updates, then FLUSH TABLES WITH READ LOCK, then COMMIT, would cause replication slaves to stop (complaining about error 1223). Bug surfaced when using the InnoDB innobackup script. (Bug #5949)

• OPTIMIZE TABLE, REPAIR TABLE, and ANALYZE TABLE are now replicated without any error code in the binary log. (Bug #5551)

• If a connection had an open transaction but had done no updates to transactional tables (for example if had just done a SELECT FOR UPDATE then executed a non-transactional update, that update automatically committed the transaction (thus releasing InnoDB's row-level locks etc). (Bug #5714)

• If a connection was interrupted by a network error and did a rollback, the network error code got stored into the BEGIN and ROLLBACK binary log events; that caused superfluous slave stops. (Bug #6522)

• Fixed a bug which prevented mysqlbinlog from being able to read from stdin, for example, when piping the output from zcat to mysqlbinlog. (Bug #7853)

• Warning: Incompatible change! C API change: mysql_shutdown() now requires a second argument. This is a source-level incompatibility that affects how you compile client programs; it does not affect the ability of compiled clients to communicate with older servers. See Section 23.2.3.62, “mysql_shutdown()”.

• When installing a MySQL server as a Windows service, the installation command can include a --local-service option following the service name to cause the server to run using the LocalService Windows account that has limited privileges. This is in addition to the --defaults-file option that also can be given following the service name.

• Added support for read-only and updatable views based on a single table or other updatable views. View use requires that you upgrade your grant tables to add the view-related privileges. See Section 2.10.3, “Upgrading the Grant Tables”.

• Implemented a new “greedy search” optimizer that can significantly reduce the time spent on query optimization for some many-table joins. (You are affected if not only some particular SELECT is slow, but even using EXPLAIN for it takes a noticeable amount of time.) Two new system variables, optimizer_search_depth and optimizer_prune_level, can be used to fine-tune optimizer behavior.

• A stored procedure is no longer “global.” That is, it now belongs to a specific database:

  • When a database is dropped, all routines belonging to that database are also dropped.

  • Procedure names may be qualified, for example, db.p()

  • When executed from another database, an implicit USE db_name is in effect.

  • Explicit USE db_name statements no longer are allowed in a stored procedure.

  See Chapter 18, Stored Procedures and Functions.

• Fixed SHOW TABLES output field name and values according to standard. Field name changed from Type to table_type, values are BASE TABLE, VIEW and ERROR. (Bug #4603)

• Added the sql_updatable_view_key system variable.

• Added the --replicate-same-server-id server option.

• Added Last_query_cost status variable that reports optimizer cost for last compiled query.

• Added the --to-last-log option to mysqlbinlog, for use in conjunction with --read-from-remote-server.

• Added the --innodb-safe-binlog server option, which adds consistency guarantees between the content of InnoDB tables and the binary log. See Section 5.11.3, “The Binary Log”.

• OPTIMIZE TABLE for InnoDB tables is now mapped to ALTER TABLE instead of ANALYZE TABLE. This rebuilds the table, which updates index statistics and frees space in the clustered index.

• sync_frm is now a settable global variable (not only a startup option).

• For replication of MEMORY (HEAP) tables: Made the master automatically write a DELETE FROM statement to its binary log when a MEMORY table is opened for the first time since master's startup. This is for the case where the slave has replicated a non-empty MEMORY table, then the master is shut down and restarted: the table is now empty on master; the DELETE FROM empties it on slave too. Note that even with this fix, between the master's restart and the first use of the table on master, the slave still has out-of-date data in the table. But if you use the --init-file option to populate the MEMORY table on the master at startup, it ensures that the failing time interval is zero. (Bug #2477)

• When a session having open temporary tables terminates, the statement automatically written to the binary log is now DROP TEMPORARY TABLE IF EXISTS instead of DROP TEMPORARY TABLE, for more robustness.

• The MySQL server now returns an error if SET SQL_LOG_BIN is issued by a user without the SUPER privilege (in previous versions it just silently ignored the statement in this case).

• Changed that when the MySQL server has binary logging disabled (that is, no --log-bin option was used), then no transaction binary log cache is allocated for connections. This should save binlog_cache_size bytes of memory (32KB by default) for every connection.

• Added the sync_binlog=N global variable and startup option, which makes the MySQL server synchronize its binary log to disk (fdatasync()) after every Nth write to the binary log.

• Changed the slave SQL thread to print less useless error messages (no more message duplication; no more messages when an error is skipped because of slave-skip-errors).

• DROP DATABASE IF EXISTS, DROP TABLE IF EXISTS, single-table DELETE, and single-table UPDATE now are written to the binary log even if they changed nothing on the master (for example, even if a DELETE matched no rows). The old behavior sometimes caused bad surprises in replication setups.

• Replication and mysqlbinlog now have better support for the case that the session character set and collation variables are changed within a given session. See Section 6.7, “Replication Features and Known Problems”.

• Killing a CHECK TABLE statement does not result in the table being marked as “corrupted” any more; the table remains as if CHECK TABLE had not even started. See Section 13.5.5.3, “KILL Syntax”.

• Strange results with index (x, y) ... WHERE x=val_1 AND y>=val_2 ORDER BY pk; (Bug #3155)

• Subquery and order by (Bug #3118)

• ALTER DATABASE caused the client to hang if the database did not exist. (Bug #2333)

• SLAVE START (which is a deprecated syntax, START SLAVE should be used instead) could crash the slave. (Bug #2516)

• Multiple-table DELETE statements were never replicated by the slave if there were any --replicate-*-table options. (Bug #2527)

• The MySQL server did not report any error if a statement (submitted through mysql_real_query() or mysql_stmt_prepare()) was terminated by garbage characters. This can happen if you pass a wrong length parameter to these functions. The result was that the garbage characters were written into the binary log. (Bug #2703)

• Replication: If a client connects to a slave server and issues an administrative statement for a table (for example, OPTIMIZE TABLE or REPAIR TABLE), this could sometimes stop the slave SQL thread. This does not lead to any corruption, but you must use START SLAVE to get replication going again. (Bug #1858)

• Made clearer the error message that one gets when an update is refused because of the --read-only option. (Bug #2757)

• Fixed that --replicate-wild-*-table rules apply to ALTER DATABASE when the table pattern is %, as is the case for CREATE DATABASE and DROP DATABASE. (Bug #3000)

• Fixed that when a Rotate event is found by the slave SQL thread in the middle of a transaction, the value of Relay_Log_Pos in SHOW SLAVE STATUS remains correct. (Bug #3017)

• Corrected the master's binary log position that InnoDB reports when it is doing a crash recovery on a slave server. (Bug #3015)

• Changed the column Seconds_Behind_Master in SHOW SLAVE STATUS to never show a value of -1. (Bug #2826)

• Changed that when a DROP TEMPORARY TABLE statement is automatically written to the binary log when a session ends, the statement is recorded with an error code of value zero (this ensures that killing a SELECT on the master does not result in a superfluous error on the slave). (Bug #3063)

• Changed that when a thread handling INSERT DELAYED (also known as a delayed_insert thread) is killed, its statements are recorded with an error code of value zero (killing such a thread does not endanger replication, so we thus avoid a superfluous error on the slave). (Bug #3081)

• Fixed deadlock when two START SLAVE commands were run at the same time. (Bug #2921)

• Fixed that a statement never triggers a superfluous error on the slave, if it must be excluded given the --replicate-* options. The bug was that if the statement had been killed on the master, the slave would stop. (Bug #2983)

• The --local-load option of mysqlbinlog now requires an argument.

• Fixed a segmentation fault when running LOAD DATA FROM MASTER after RESET SLAVE. (Bug #2922)

• mysqlbinlog --read-from-remote-server read all binary logs following the one that was requested. It now stops at the end of the requested file, the same as it does when reading a local binary log. There is an option --to-last-log to get the old behavior. (Bug #3204)

• Fixed mysqlbinlog --read-from-remote-server to print the exact positions of events in the "at #" lines. (Bug #3214)

• Fixed a rare error condition that caused the slave SQL thread spuriously to print the message Binlog has bad magic number and stop when it was not necessary to do so. (Bug #3401)

• Fixed mysqlbinlog not to forget to print a USE statement under rare circumstances where the binary log contained a LOAD DATA INFILE statement. (Bug #3415)

• Fixed a memory corruption when replicating a LOAD DATA INFILE when the master had version 3.23. (Bug #3422)

• Multiple-table DELETE statements were always replicated by the slave if there were some --replicate-*-ignore-table options and no --replicate-*-do-table options. (Bug #3461)

• Fixed a crash of the MySQL slave server when it was built with --with-debug and replicating itself. (Bug #3568)

• Fixed that in some replication error messages, a very long query caused the rest of the message to be invisible (truncated), by putting the query last in the message. (Bug #3357)

• If server-id was not set using startup options but with SET GLOBAL, the replication slave still complained that it was not set. (Bug #3829)

• mysql_fix_privilege_tables didn't correctly handle the argument of its --password=password_val option. (Bug #4240)

• Fixed potential memory overrun in mysql_real_connect() (which required a compromised DNS server and certain operating systems). (Bug #4017, CAN-2004-0836)

• During the installation process of the server RPM on Linux, mysqld was run as the root system user, and if you had --log-bin=somewhere_out_of_var_lib_mysql it created binary log files owned by root in this directory, which remained owned by root after the installation. This is now fixed by starting mysqld as the mysql system user instead. (Bug #4038)

• Made DROP DATABASE honor the value of lower_case_table_names. (Bug #4066)

• The slave SQL thread refused to replicate INSERT ... SELECT if it examined more than 4 billion rows. (Bug #3871)

• mysqlbinlog didn't escape the string content of user variables, and did not deal well when these variables were in non-ASCII character sets; this is now fixed by always printing the string content of user variables in hexadecimal. The character set and collation of the string is now also printed. (Bug #3875)

• Fixed incorrect destruction of expression that led to a server crash on complex AND/OR expressions if query was ignored (either by a replication server because of --replicate-*-table rules, or by any MySQL server because of a syntax error). (Bug #3969, Bug #4494)

• If CREATE TEMPORARY TABLE t SELECT failed while loading the data, the temporary table was not dropped. (Bug #4551)

• Fixed that when a multiple-table DROP TABLE failed to drop a table on the master server, the error code was not written to the binary log. (Bug #4553)

• When the slave SQL thread was replicating a LOAD DATA INFILE statement, it didn't show the statement in the output of SHOW PROCESSLIST. (Bug #4326)

• Important note: If you upgrade to MySQL 4.1.1 or higher, it is difficult to downgrade back to 4.0 or 4.1.0! That is because, for earlier versions, InnoDB is not aware of multiple tablespaces.

• Added support for SUM(DISTINCT), MIN(DISTINCT), and MAX(DISTINCT).

• The KILL statement now takes CONNECTION and QUERY modifiers. The first is the same as KILL with no modifier (it kills a given connection thread). The second kills only the statement currently being executed by the connection.

• Added TIMESTAMPADD() and TIMESTAMPDIFF() functions.

• Added WEEK and QUARTER values as INTERVAL arguments for the DATE_ADD() and DATE_SUB() functions.

• New binary log format that enables replication of these session variables: sql_mode, SQL_AUTO_IS_NULL, FOREIGN_KEY_CHECKS (which was replicated since 4.0.14, but here it's done more efficiently and takes less space in the binary logs), UNIQUE_CHECKS. Other variables (like character sets, SQL_SELECT_LIMIT, ...) will be replicated in upcoming 5.0.x releases.

• Implemented Index Merge optimization for OR clauses. See Section 7.2.6, “Index Merge Optimization”.

• Basic support for stored procedures (SQL:2003 style). See Chapter 18, Stored Procedures and Functions.

• Added SELECT INTO list_of_vars, which can be of mixed (that is, global and local) types. See Section 18.2.9.3, “SELECT ... INTO Statement”.

• Easier replication upgrade (5.0.0 masters can read older binary logs and 5.0.0 slaves can read older relay logs). See Section 6.5, “Replication Compatibility Between MySQL Versions” for more details). The format of the binary log and relay log is changed compared to that of MySQL 4.1 and older.

• (Bug #11019) mgmapi start backup in some cases returns wrong backupid

• (Bug #10190) Backup from cluster wih NoOfReplica=1 is corrupt

• (Bug #9246) Condition pushdown and left join, wrong result

• (Bug #10956) More than 7 node restarts with --initial caused cluster to fail.

• (Bug #9945) ALTER TABLE caused server crash. (Linux/390)

• (Bug #9826) (Bug #10948) Schema change (DROP TABLE, ALTER TABLE) crashed HPUX and PPC32.

• (Bug #10711) (Bug #9363) (Bug #8918) (Bug #10058) (Bug #9025) Cluster would time out and crash after first query; setting DataMemory to more than 2GB prevented cluster from starting; calling ndb_select_count() crashed the cluster. (64-bit Unix OSes)

• Limit on number of metadata objects (number of tables, indexes and BLOBs) now increased to 20,320

• The server would hang on successive calls to an INSERT ... ON DUPLICATE KEY UPDATE query. (Bug #9725)

• (Bug #10193) Invalid DataDir in config causes ndbd segmentation fault

• (Bug #10813) Build with SCI Transporter fails

• (Bug #10831) ndb mgmd LogDestination maxfiles does not rotate logs properly

• Decreased IndexMemory Usage

• Parallel key lookup (read-multi-range) for queries like SELECT * FROM t1 WHERE primary_key IN (1,2,3,4,5,6,7,8,9,10);

Patches merged from versions 4.1.11 and 4.1.12

• (Bug #8315) NdbScanFilter cmp method only works for strings of exact word boundry length

• (Bug #8103) Configuration handling error

• (Bug #8035) mysqld signal 10 when ndbd is shutdown

• (Bug #7631) NDB$EVENT contains unreadable event and table names

• (Bug #7628) Filtered event types are ignored

• (Bug #7627) Drop Event operation fails

• (Bug #7424) create index on datetime fails

• Condition pushdown to storage engine now works for update and delete as well

• (Bug #9675) Auto-increment not working with INSERT..SELECT and NDB storage

• (Bug #9517) Condition pushdown to storage engine does not work for update/delete

• (Bug #9282) API Node Crashes/Reloads on 'DELETE FROM'

• (Bug #9280) Memory leak in cluster when dependent sub-queries are used

• (Bug #8585) ndb_cache2 fails on aix52

• Condition pushdown to storage engine

• Query cache enabled for cluster

• Patches merged from version 4.1.10

• This was the first MySQL Cluster release in the 5.0 series. As nearly all attention was still focused on getting 4.1 stable, it is not recommended to use MySQL 5.0.1 for MySQL Cluster.

• N/A

• (Bug #11132) Connections between data nodes and management nodes were not being closed following shutdown of ndb_mgmd.

• (Bug #11050) ndb_mgm> show printed incorrectly after master data node failure.

• (Bug #10956) More than 7 node restarts with --initial caused cluster to fail.

• (Bug #9826) (Bug #10948) Schema change (DROP TABLE, ALTER TABLE) crashed HPUX and PPC32.

• (Bug #9025) Data nodes failed to restart on 64-bit Solaris.

• (Bug #11166) Insert records were incorrectly applied by ndb_restore, thus making restoration from backup inconsistent if the binlog contained inserts.

• (Bug #8918) (Bug #9363) (Bug #10711) (Bug #10058) (Bug #9025) Cluster would time out and crash after first query; setting DataMemory to more than 2GB prevented cluster from starting; calling ndb_select_count() crashed the cluster. (64-bit Unix OSes)

• (Bug #10190) When making a backup of a cluster where NumberOfReplicas was equal to 1, the backup's metadata was corrupted. (Linux)

• (Bug #9945) ALTER TABLE caused server crash. (Linux/390)

• (Bug #11133) A delete operation performed as part of a transaction caused an erroneous result.

• (Bug #10294) Not allowing sufficient parallelism in cluster configuration (e.g. NoOfTransactions too small) caused ndb_restore to fail without generating any error messages.

• (Bug #11290) Setting TransactionInactiveTimeout= 0 did not result in an infinite timeout.

• (Bug #10471) Backup can become inconsisten wi/ certain combinations of multi updates

• (Bug #10287) ndb_select_all "delimiter" option non functional

• (Bug #10142) Unhandled resource shortage in UNIQUE index code

• (Bug #10029) crash in ordered index scan after db full

• (Bug #10001) 2 NDB nodes get signal 6 (abort) in DBTC

• (Bug #9969) 4012 - has misleading error message

• (Bug #9960) START BACKUP reports failure albeit succeding

• (Bug #9924) ABORT BACKUP 1 crashes 4 node cluster

• (Bug #9892) Index activation file during node recovery

• (Bug #9891) Crash in DBACC (line 7004) during commit

• (Bug #9865) SELECT does not function properly

• (Bug #9839) Column with AUTOINC contains -1 Value on node stop

• (Bug #9757) Uncompleted node failure after gracefully stopping node

• (Bug #9749) Transactions causes deadlock in ACC

• (Bug #9724) Node fails to start: Message: File has already been opened

• (Bug #9691) UPDATE fails on attempt to update primary key

• (Bug #9675) Auto-increment not working with INSERT..SELECT and NDB storage

• (Bug #9318) drop database does not drop ndb tables

• (Bug #9280) Memory leak in cluster when dependent sub-queries are used

• (Bug #8928) create table with keys will shutdown the cluster

• Creating a table did not work for a cluster with 6 nodes. (Bug #8928) Databases with 1, 2, 4, 8, ... (2ⁿ nodes) did not have the problem. After a rolling upgrade, restart each node manually by restarting it with the --initial option. Otherwise, use dump and restore after an upgrade.

• (Bug #9916) DbaccMain.cpp / DBACC (Line: 4876) / Pointer too large

• (Bug #9435) TIMESTAMP columns don't update

• (Bug #9052) Uninitialized data during unique index build, potential cluster crash

• (Bug #8876) Timeout when committing aborted transaction after node failure

• (Bug #8786) ndb_autodiscover, drop index can fail, wait 2 minutes timeout

• (Bug #8853) Transaction aborted after long time during node failure (4012)

• (Bug #8753) Invalid schema object version after dropping index (crash fixed, currently retry required)

• (Bug #8645) Assertion failure with multiple management servers

• (Bug #8557) ndbd does not get same nodeid on restart

• (Bug #8556) corrupt ndb_mgm show printout for certain configurations

• (Bug #8167) cluster shared memory and mysqld signal usage clash

• (Bug #8284) Out of fragment memory in DBACC

• (Bug #8262) Node crash due to bug in DBLQH

• (Bug #8208) node restart fails on Aix 5.2

• (Bug #8167) cluster shared memory and mysqld signal usage clash

• (Bug #8101) unique index and error 4209 while selecting

• (Bug #8070) (Bug #7937) (Bug #6716) various ndb_restore core dumps on HP-UX

• (Bug #8010) 4006 forces MySQL Node Restart

• (Bug #7928) out of connection objects

• (Bug #7898) mysqld crash with ndb (solaris)

• (Bug #7864) Not possible to have more than 4.5G data memory

• New implementation of shared memory transporter.

• Cluster automatically configures shared memory transporter if possible.

• Cluster prioritizes usage of transporters with shared memory and localhost TCP

• Added switches to control the above functions, ndb-shm and ndb-optimized-node-selection.

• (Bug #7805) config.ini parsing error

• (Bug #7798) Running range scan after alter table in different thread causes node failure

• (Bug #7761) Alter table does not autocommit

• (Bug #7725) Indexed DATETIME Columns Return Random Results

• (Bug #7660) START BACKUP does not increment BACKUP-ID (Big Endian machines)

• (Bug #7593) Cannot Create A Large NDB Data Warehouse

• (Bug #7480) Mysqld crash in ha_ndbcluster using Query Browser

• (Bug #7470) shared memory transporter does not connect

• (Bug #7396) Primary Key not working in NDB Mysql Clustered table (solaris)

• (Bug #7379) ndb restore fails to handle blobs and multiple databases

• (Bug #7346) ndb_restore enters infinite loop

• (Bug #7340) Problem for inserting data into the Text field on utf8

• (Bug #7124) ndb_mgmd is aborted on startup when using SHM connection

• Default port for ndb_mgmd was changed to 1186 (from 2200) as this port number was officially assigned to MySQL Cluster by IANA.

• New command in ndb_mgm, PURGE STALE SESSIONS, as a workaround for cases where nodes fail to allocate a node id even if it is free to use.

• New command in ndb_mgm, CONNECT.

• The ndb executables have been changed to make use of the regular MySQL command line option parsing features. See Section 16.5.5, “Command Options for MySQL Cluster Processes” for notes on changes.

• As bonus of the above you can now specify all command line options in my.cnf using the executable names as sections, i.e. [ndbd], [ndb_mgmd], [ndb_mgm], [ndb_restore] etc.

        [ndbd]
        ndb-connectstring=myhost.domain.com:1234
        [ndb_mgm]
        ndb-connectstring=myhost.domain.com:1234
  

• Added use of section [mysql_cluster] in my.cnf. All cluster executables, including mysqld, parse this section. Convenient place to put e.g. ndb-connectstring so that it only needs to be specified once.

• Added cluster log info events on allocation and deallocation of nodeid's.

• Added cluster log info events on connection refuse as a result of version mismatch.

• Extended connectstring syntax to allow for leaving the port number out. E.g. ndb-connectstring|connect-string=myhost1,myhost2,myhost3 is a valid connectstring and connect occurs on default port 1186.

• Clear text ndb error messages provided also for error codes that are mapped to corresponding mysql error codes, by executing SHOW WARNINGS after an error has occured which relates to the ndb storage engine.

• Significant performance improvements done for read performance, especially for blobs.

• Added some variables for performance tuning, ndb_force_send and ndb_use_exact_count. Do show variables like 'ndb%'; in mysql client for listing. Use set command to alter variables.

• Added variables to set some options, ndb_use_transactions and ndb_autoincrement_prefetch_sz.

• (Bug #7303) ndb_mgm: Trying to set CLUSTERLOG for a specific node id core dumps

• (Bug #7193) start backup gives false error printout

• (Bug #7153) Cluster nodes don't report error on endianness mismatch

• (Bug #7152) ndb_mgmd segmentation fault on incorrect HostName in configuration

• (Bug #7104) clusterlog filtering and level setting broken

• (Bug #6995) ndb_recover on varchar fields results in changing case of data

• (Bug #6919) all status only shows 2 nodes on a 8-node cluster

• (Bug #6871) DBD execute failed: Got error 897 'Unknown error code' from ndbcluster

• (Bug #6794) Wrong outcome of update operation of ndb table

• (Bug #6791) Segmentation fault when config.ini is not correctly set

• (Bug #6775) failure in acc when running many mysql clients

• (Bug #6696) ndb_mgm command line options inconsistent with behavior

• (Bug #6684) ndb_restore doesn't give error messages if inproper command given

• (Bug #6677) ndb_mgm can crash on "ALL CLUSTERLOG"

• (Bug #6538) Error code returned when select max() on empty table with index

• (Bug #6451) failing create table givers "ghost" tables which are impossible to remove

• (Bug #6435) strange behavior of left join

• (Bug #6426) update with long pk fails

• (Bug #6398) update of primary key fails

• (Bug #6354) mysql does not complain about --ndbcluster option when NDB is not compiled in

• (Bug #6331) INSERT IGNORE .. SELECT breaks subsequent inserts

• (Bug #6288) cluster nodes crash on data import

• (Bug #6031) To drop database you have to execute DROP DATABASE command twice

• (Bug #6020) LOCK TABLE + delete returns error 208

• (Bug #6018) REPLACE does not work for BLOBs + NDB

• (Bug #6016) Strange crash with blobs + different DATABASES

• (Bug #5973) ndb table belonging to different database shows up in show tables

• (Bug #5872) ALTER TABLE with blob from ndb table to myisam fails

• (Bug #5844) Failing mysql-test-run leaves stray NDB processes behind

• (Bug #5824) HELP text messed up in ndb_mgm

• (Bug #5786) Duplicate key error after restore

• (Bug #5785) lock timeout during concurrent update

• (Bug #5782) Unknown error when using LIMIT with ndb table

• (Bug #5756) RESTART node from ndb_mgm fails

• A few more not reported bugs fixed

• Optimization 1: Improved performance on index scans. Measured 30% performance increase on query which do large amounts of index scans.

• Optimization 2: Improved performance on primary key lookups. Around double performance for autocommitted primary key lookups.

• Optimization 3: Improved performance when using blobs by avoiding usage of exclusive locks for blobs.

• A few bugs fixed.

• Limited character set support for storage engine NDBCLUSTER:

  Char set	Collation
  big5	big5_chinese_ci
  	big5_bin
  binary	binary
  euckr	euckr_korean_ci
  	euckr_bin
  gb2312	gb2312_chinese_ci
  	gb2312_bin
  gbk	gbk_chinese_ci
  	gbk_bin
  latin1	latin1_swedish_ci
  	latin1_bin
  sjis	sjis_japanese_ci
  	sjis_bin
  tis620	tis620_bin
  ucs2	ucs2_general_ci
  	ucs2_bin
  ujis	ujis_japanese_ci
  	ujis_bin
  utf8	utf8_general_ci
  	utf8_bin

• The SCI Transporter has been brought up-to-date with all changes and now works and has been documented as well.

• Optimizations when several clients to a MySQL Server access ndb tables.

• Added more checks and warnings for erroneous and unappropriate cluster configurations.

• SHOW TABLES now directly shows ndb tables created on a different mysql server, i.e. without a prior table access.

• Enhanced support for starting MySQL Server independently of ndbd and ndb_mgmd.

• Clear text ndb error messages provided by executing SHOW WARNINGS after an error has occured which relates to the ndb storage engine.

• Quite a few bugs fixed.

• Many queries in MySQL Cluster are executed as range scans or full table scans. All queries that don't use a unique hash index or the primary hash index use this access method. In a distributed system it is crucial that batching is properly performed.

  In previous versions, the batch size was fixed to 16 per data node. In this version it is configurable per MySQL Server. So for queries using lots of large scans it is appropriate to set this parameter rather large and for queries using many small scans only fetching a small amount of records it is appropriate to set it low.

  The performance of queries can easily change as much as 40% based on how this variable is set.

  In future versions more logic will be implemented for assessing the batch size on a per-query basis. Thus, the semantics of the new configuration variable ScanBatchSize are likely to change.

• The fixed size overhead of the ndbd process has been greatly decreased. This is also true for the overhead per operation record as well as overhead per table and index.

  A number of new configuration variables have been introduced to enable configuration of system buffers. Configuration variables for specifying the numbers of tables, unique hash indexes, and ordered indexes have also been introduced.

  New configuration variables: MaxNoOfOrderedIndexes, MaxNoOfUniqueHashIndexes

  Configuration variables no longer used: MaxNoOfIndexes (split into the two above).

• In previous versions ALTER TABLE, TRUNCATE TABLE, and LOAD DATA were performed as one big transaction. In this version, all of these statements are automatically separated into several distinct transactions.

  This removes the limitation that one could not change very large tables due to the MaxNoOfConcurrentOperations parameter.

• MySQL CLuster's online backup feature now backs up indexes so that both data and indexes are restored.

• In previous versions it was not possible to use NULL in indexes. This is now possible for all supported index types.

• Much work has been put onto making AUTO_INCREMENT features work as for other table handlers. Autoincrements as a partial key is still only supported by MyISAM.

• In earlier versions, mysqld would crash if the cluster wasn't started with the --ndbcluster option. Now mysqld handles cluster crashes and starts without crashing.

• The -i option for initial startup of ndbd has been removed. Initial startup still can be specified by using the --initial option. The reason for this is to ensure that it is clear what takes place when using --initial: this option completely removes all data from the disk and should only be used at initial start, in certain software upgrade cases, and in some cases as a workaround when nodes cannot be restarted successfully.

• The management client (ndb_mgm) now has additional commands and more information is printed for some commands such as show.

• In previous versions, the files were called ndb_0.. when it wasn't possible to allocate a node ID when starting the node. To ensure that files are not so easily overwritten, these files are now named ndb_pid.., where pid is the process ID assigned by the OS.

• The default parameters have changed for ndb_mgmd and ndbd. In particular, they are now started as daemons by default. The -n option has been removed since it could cause confusion as to its meaning (nostart or nodaemon).

• In the configuration file, you can now use [NDBD] as an alias for [DB], [MYSQLD] as an alias for [API], and [NDB_MGMD] as an alias for [MGM]. Note: In fact, [NDBD], [MYSQLD], and [NDB_MGMD] are now the preferred designations, although the older ones will continue to be supported for some time to come in order to maintain backwards compatibility.

• Many more checks for consistency in configuration have been introduced to in order to provide quicker feedback on configuration errors.

• In the connect string, it is now possible to use both ‘;’ and ‘,’ as the separator between entries. Thus, "nodeid=2,host=localhost:2200" is equivalent to "nodeid=2;host=localhost:2200".

  In the configuration file, it is also possible to use ‘:’ or ‘=’ for assignment values. For example, MaxNoOfOrderedIndexes : 128 and MaxNoOfOrderedIndexes = 128 are equivalent expressions.

• The configuration variable names are now case insensitive, so MaxNoOfOrderedIndexes: 128 is equivalent to MAXNOOFORDEREDINDEXES = 128.

• It is possible now to set the backup directory separately from the FileSystemPath by using the BackupDir configuration variable.

  Log files and trace files can now be placed in any directory by setting the DataDir configuration variable.

  FileSystemPath is no longer mandatory and defaults to DataDir.

• Queries involving tables from different databases are now supported.

• It is now possible to update the primary key.

• The performance of ordered indexes has been greatly improved, particularly the maintenance of indexes on updates, inserts and deletes.

• Quite a few bugs fixed.

• The names of the log files and trace files created by the ndbd and ndb_mgmd processes have changed.

• Support for the many BLOB data types was introduced in this version.

• Quite a few bugs were fixed in the 4.1.4 release.

• This was the first MySQL Cluster release so all functionality was new.

• Various bugs fixed in the development process leading up to 4.1.3.

• N/A

• SQLColumns() returned no information for tables that had a column named using a reserved word. (Bug #9539)

• mysql_list_dbcolumns() and insert_fields() were retrieving all rows from a table. Fixed the queries generated by these functions to return no rows. (Bug #8198)

• SQLGetTypoInfo() returned tinyblob for SQL_VARBINARY and nothing for SQL_BINARY. Fixed to return varbinary for SQL_VARBINARY, binary for SQL_BINARY, and longblob for SQL_LONGVARBINARY. (Bug #8138)