org.hibernate.dialect
Class DB2Dialect

java.lang.Object
  org.hibernate.dialect.Dialect
      org.hibernate.dialect.DB2Dialect

Direct Known Subclasses:

DB2390Dialect, DB2400Dialect, DerbyDialect

public class DB2Dialect

extends Dialect

An SQL dialect for DB2.

Author:

Gavin King

Field Summary

Fields inherited from class org.hibernate.dialect.Dialect

CLOSED_QUOTE, QUOTE

Constructor Summary

DB2Dialect()

Method Summary

boolean	dropConstraints() Do we need to drop constraints before dropping tables in this dialect?
String	generateTemporaryTableName(String baseTableName)
String	getAddColumnString() The syntax used to add a column to a table (optional).
String	getCreateSequenceString(String sequenceName) The syntax used to create a sequence, if sequences are supported.
String	getCreateTemporaryTablePostfix()
String	getCreateTemporaryTableString()
String	getCurrentTimestampSelectString()
String	getCurrentTimestampSQLFunctionName() The name of the database-specific SQL function for retrieving the current timestamp.
String	getDropSequenceString(String sequenceName) The syntax used to drop a sequence, if sequences are supported.
String	getForUpdateString() Does this dialect support the FOR UPDATE syntax?
String	getIdentityColumnString()
String	getIdentityInsertString() The keyword used to insert a generated value into an identity column (or null).
String	getIdentitySelectString()
String	getLimitString(String sql, boolean hasOffset) Add a LIMIT clause to the given SQL SELECT
String	getLowercaseFunction() The name of the SQL function that transforms a string to lowercase
String	getQuerySequencesString() A query used to find all sequences
ResultSet	getResultSet(CallableStatement ps)
String	getSelectClauseNullString(int sqlType)
String	getSequenceNextValString(String sequenceName) Generate the appropriate select statement to to retreive the next value of a sequence, if sequences are supported.
boolean	isCurrentTimestampSelectStringCallable()
static void	main(String[] args)
int	registerResultSetOutParameter(CallableStatement statement, int col)
boolean	supportsCommentOn()
boolean	supportsCurrentTimestampSelection()
boolean	supportsIdentityColumns() Does this dialect support identity column key generation?
boolean	supportsLimit() Does this Dialect have some kind of LIMIT syntax?
boolean	supportsNotNullUnique()
boolean	supportsOuterJoinForUpdate()
boolean	supportsParametersInInsertSelect() Does this dialect support parameters within the select clause of INSERT ...
boolean	supportsSequences() Does this dialect support sequences?
boolean	supportsTemporaryTables()
boolean	supportsUnionAll()
boolean	useMaxForLimit() Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?

Methods inherited from class org.hibernate.dialect.Dialect

appendIdentitySelectToInsert, appendLockHint, bindLimitParametersFirst, bindLimitParametersInReverseOrder, buildSQLExceptionConverter, closeQuote, createCaseFragment, createOuterJoinFragment, dropTemporaryTableAfterUse, forUpdateOfColumns, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getCascadeConstraintsString, getCastTypeName, getColumnComment, getCreateSequenceStrings, getDefaultProperties, getDialect, getDialect, getDropForeignKeyString, getDropSequenceStrings, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIdentityColumnString, getIdentitySelectString, getKeywords, getLimitString, getMaxAliasLength, getNativeIdentifierGeneratorClass, getNoColumnsInsertString, getNullColumnString, getSelectGUIDString, getSelectSequenceNextValString, getTableComment, getTableTypeString, getTypeName, getTypeName, getViolatedConstraintNameExtracter, hasAlterTable, hasDataTypeInIdentityColumn, hasSelfReferentialForeignKeyBug, openQuote, performTemporaryTableDDLInIsolation, qualifyIndexName, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, supportsCascadeDelete, supportsColumnCheck, supportsIfExistsAfterTableName, supportsIfExistsBeforeTableName, supportsInsertSelectIdentity, supportsLimitOffset, supportsTableCheck, supportsUnique, supportsUniqueConstraintInCreateAlterTable, supportsVariableLimit, toBooleanValueString, toString, transformSelectString, useInputStreamToInsertBlob

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DB2Dialect

public DB2Dialect()

Method Detail

getLowercaseFunction

public String getLowercaseFunction()

Description copied from class: Dialect

The name of the SQL function that transforms a string to lowercase

Overrides:

getLowercaseFunction in class Dialect

Returns:

String

getAddColumnString

public String getAddColumnString()

Description copied from class: Dialect

The syntax used to add a column to a table (optional).

Overrides:

getAddColumnString in class Dialect

dropConstraints

public boolean dropConstraints()

Description copied from class: Dialect

Do we need to drop constraints before dropping tables in this dialect?

Overrides:

dropConstraints in class Dialect

Returns:

boolean

supportsIdentityColumns

public boolean supportsIdentityColumns()

Description copied from class: Dialect

Does this dialect support identity column key generation?

Overrides:

supportsIdentityColumns in class Dialect

Returns:

boolean

getIdentitySelectString

public String getIdentitySelectString()

Overrides:

getIdentitySelectString in class Dialect

getIdentityColumnString

public String getIdentityColumnString()

Overrides:

getIdentityColumnString in class Dialect

getIdentityInsertString

public String getIdentityInsertString()

Description copied from class: Dialect

The keyword used to insert a generated value into an identity column (or null). Need if the dialect does not support inserts that specify no column values.

Overrides:

getIdentityInsertString in class Dialect

Returns:

String

getSequenceNextValString

public String getSequenceNextValString(String sequenceName)

Description copied from class: Dialect

Generate the appropriate select statement to to retreive the next value of a sequence, if sequences are supported.

This should be a "stand alone" select statement.

Overrides:

getSequenceNextValString in class Dialect

Parameters:

sequenceName - the name of the sequence

Returns:

String The "nextval" select string.

getCreateSequenceString

public String getCreateSequenceString(String sequenceName)

Description copied from class: Dialect

The syntax used to create a sequence, if sequences are supported.

Overrides:

getCreateSequenceString in class Dialect

Parameters:

sequenceName - the name of the sequence

Returns:

String

getDropSequenceString

public String getDropSequenceString(String sequenceName)

Description copied from class: Dialect

The syntax used to drop a sequence, if sequences are supported.

Overrides:

getDropSequenceString in class Dialect

Parameters:

sequenceName - the name of the sequence

Returns:

String

supportsSequences

public boolean supportsSequences()

Description copied from class: Dialect

Does this dialect support sequences?

Overrides:

supportsSequences in class Dialect

Returns:

boolean

getQuerySequencesString

public String getQuerySequencesString()

Description copied from class: Dialect

A query used to find all sequences

Overrides:

getQuerySequencesString in class Dialect

See Also:

SchemaUpdate

supportsLimit

public boolean supportsLimit()

Description copied from class: Dialect

Does this Dialect have some kind of LIMIT syntax?

Overrides:

supportsLimit in class Dialect

getLimitString

public String getLimitString(String sql,
                             boolean hasOffset)

Description copied from class: Dialect

Add a LIMIT clause to the given SQL SELECT

Overrides:

getLimitString in class Dialect

Returns:

the modified SQL

getForUpdateString

public String getForUpdateString()

Description copied from class: Dialect

Does this dialect support the FOR UPDATE syntax?

Overrides:

getForUpdateString in class Dialect

Returns:

boolean

useMaxForLimit

public boolean useMaxForLimit()

Description copied from class: Dialect

Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?

Overrides:

useMaxForLimit in class Dialect

supportsOuterJoinForUpdate

public boolean supportsOuterJoinForUpdate()

Overrides:

supportsOuterJoinForUpdate in class Dialect

supportsNotNullUnique

public boolean supportsNotNullUnique()

Overrides:

supportsNotNullUnique in class Dialect

getSelectClauseNullString

public String getSelectClauseNullString(int sqlType)

Overrides:

getSelectClauseNullString in class Dialect

main

public static void main(String[] args)

supportsUnionAll

public boolean supportsUnionAll()

Overrides:

supportsUnionAll in class Dialect

registerResultSetOutParameter

public int registerResultSetOutParameter(CallableStatement statement,
                                         int col)
                                  throws SQLException

Overrides:

registerResultSetOutParameter in class Dialect

Throws:

SQLException

getResultSet

public ResultSet getResultSet(CallableStatement ps)
                       throws SQLException

Overrides:

getResultSet in class Dialect

Throws:

SQLException

supportsCommentOn

public boolean supportsCommentOn()

Overrides:

supportsCommentOn in class Dialect

supportsTemporaryTables

public boolean supportsTemporaryTables()

Overrides:

supportsTemporaryTables in class Dialect

getCreateTemporaryTableString

public String getCreateTemporaryTableString()

Overrides:

getCreateTemporaryTableString in class Dialect

getCreateTemporaryTablePostfix

public String getCreateTemporaryTablePostfix()

Overrides:

getCreateTemporaryTablePostfix in class Dialect

generateTemporaryTableName

public String generateTemporaryTableName(String baseTableName)

Overrides:

generateTemporaryTableName in class Dialect

supportsCurrentTimestampSelection

public boolean supportsCurrentTimestampSelection()

Overrides:

supportsCurrentTimestampSelection in class Dialect

getCurrentTimestampSelectString

public String getCurrentTimestampSelectString()

Overrides:

getCurrentTimestampSelectString in class Dialect

isCurrentTimestampSelectStringCallable

public boolean isCurrentTimestampSelectStringCallable()

Overrides:

isCurrentTimestampSelectStringCallable in class Dialect

supportsParametersInInsertSelect

public boolean supportsParametersInInsertSelect()

Description copied from class: Dialect

Does this dialect support parameters within the select clause of INSERT ... SELECT ... statements?

Overrides:

supportsParametersInInsertSelect in class Dialect

Returns:

True if this is supported; false otherwise.

getCurrentTimestampSQLFunctionName

public String getCurrentTimestampSQLFunctionName()

Description copied from class: Dialect

The name of the database-specific SQL function for retrieving the current timestamp.

Overrides:

getCurrentTimestampSQLFunctionName in class Dialect

Returns:

The function name.