org.hibernate.dialect
Class PostgreSQLDialect

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

public class PostgreSQLDialect

extends Dialect

An SQL dialect for Postgres

Author:

Gavin King

Field Summary

Fields inherited from class org.hibernate.dialect.Dialect

CLOSED_QUOTE, QUOTE

Constructor Summary

PostgreSQLDialect()

Method Summary

boolean	bindLimitParametersInReverseOrder() Does the LIMIT clause specify arguments in the "reverse" order limit, offset instead of offset, limit?
boolean	dropConstraints() Do we need to drop constraints before dropping tables in this dialect?
String	getAddColumnString() The syntax used to add a column to a table (optional).
String	getCascadeConstraintsString() Completely optional cascading drop clause
String	getCreateSequenceString(String sequenceName) The syntax used to create a sequence, if sequences are supported.
String	getCreateTemporaryTablePostfix()
String	getCreateTemporaryTableString()
String	getCurrentTimestampSelectString()
String	getDropSequenceString(String sequenceName) The syntax used to drop a sequence, if sequences are supported.
String	getForUpdateString(String aliases) Does this dialect support the FOR UPDATE OF syntax?
String	getIdentityColumnString(int type) The keyword used to specify an identity column, if identity column key generation is supported.
String	getIdentitySelectString(String table, String column, int type) The syntax that returns the identity value of the last insert, if identity column key generation is supported.
String	getLimitString(String sql, boolean hasOffset) Add a LIMIT clause to the given SQL SELECT
Class	getNativeIdentifierGeneratorClass()
String	getNoColumnsInsertString() The keyword used to insert a row without specifying any column values.
String	getQuerySequencesString() A query used to find all sequences
String	getSelectClauseNullString(int sqlType) Workaround for postgres bug #1453
String	getSelectSequenceNextValString(String sequenceName) Generate the select expression fragment that will retreive the next value of a sequence, if sequences are supported.
String	getSequenceNextValString(String sequenceName) Generate the appropriate select statement to to retreive the next value of a sequence, if sequences are supported.
ViolatedConstraintNameExtracter	getViolatedConstraintNameExtracter()
boolean	hasDataTypeInIdentityColumn() Whether this dialect have an Identity clause added to the data type or a completely seperate identity data type
boolean	isCurrentTimestampSelectStringCallable()
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	supportsOuterJoinForUpdate()
boolean	supportsSequences() Does this dialect support sequences?
boolean	supportsTemporaryTables()
boolean	supportsUnionAll()
String	toBooleanValueString(boolean bool) The SQL value that the JDBC driver maps boolean values to
boolean	useInputStreamToInsertBlob()

Methods inherited from class org.hibernate.dialect.Dialect

appendIdentitySelectToInsert, appendLockHint, bindLimitParametersFirst, buildSQLExceptionConverter, closeQuote, createCaseFragment, createOuterJoinFragment, dropTemporaryTableAfterUse, forUpdateOfColumns, generateTemporaryTableName, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getCastTypeName, getColumnComment, getCreateSequenceStrings, getCurrentTimestampSQLFunctionName, getDefaultProperties, getDialect, getDialect, getDropForeignKeyString, getDropSequenceStrings, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIdentityColumnString, getIdentityInsertString, getIdentitySelectString, getKeywords, getLimitString, getLowercaseFunction, getMaxAliasLength, getNullColumnString, getResultSet, getSelectGUIDString, getTableComment, getTableTypeString, getTypeName, getTypeName, hasAlterTable, hasSelfReferentialForeignKeyBug, openQuote, performTemporaryTableDDLInIsolation, qualifyIndexName, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, registerResultSetOutParameter, supportsCascadeDelete, supportsColumnCheck, supportsIfExistsAfterTableName, supportsIfExistsBeforeTableName, supportsInsertSelectIdentity, supportsLimitOffset, supportsNotNullUnique, supportsParametersInInsertSelect, supportsTableCheck, supportsUnique, supportsUniqueConstraintInCreateAlterTable, supportsVariableLimit, toString, transformSelectString, useMaxForLimit

Methods inherited from class java.lang.Object

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

Constructor Detail

PostgreSQLDialect

public PostgreSQLDialect()

Method Detail

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

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.

getSelectSequenceNextValString

public String getSelectSequenceNextValString(String sequenceName)

Description copied from class: Dialect

Generate the select expression fragment that will retreive the next value of a sequence, if sequences are supported.

This differs from Dialect.getSequenceNextValString(String) in that this should return an expression usable within another select statement.

Overrides:

getSelectSequenceNextValString in class Dialect

Parameters:

sequenceName - the name of the sequence

Returns:

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

getCascadeConstraintsString

public String getCascadeConstraintsString()

Description copied from class: Dialect

Completely optional cascading drop clause

Overrides:

getCascadeConstraintsString in class Dialect

Returns:

String

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

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

bindLimitParametersInReverseOrder

public boolean bindLimitParametersInReverseOrder()

Description copied from class: Dialect

Does the LIMIT clause specify arguments in the "reverse" order limit, offset instead of offset, limit?

Overrides:

bindLimitParametersInReverseOrder in class Dialect

Returns:

true if the correct order is limit, offset

supportsIdentityColumns

public boolean supportsIdentityColumns()

Description copied from class: Dialect

Does this dialect support identity column key generation?

Overrides:

supportsIdentityColumns in class Dialect

Returns:

boolean

getForUpdateString

public String getForUpdateString(String aliases)

Description copied from class: Dialect

Does this dialect support the FOR UPDATE OF syntax?

Overrides:

getForUpdateString in class Dialect

Returns:

boolean

getIdentitySelectString

public String getIdentitySelectString(String table,
                                      String column,
                                      int type)

Description copied from class: Dialect

The syntax that returns the identity value of the last insert, if identity column key generation is supported.

Overrides:

getIdentitySelectString in class Dialect

Parameters:

type - TODO

getIdentityColumnString

public String getIdentityColumnString(int type)

Description copied from class: Dialect

The keyword used to specify an identity column, if identity column key generation is supported.

Overrides:

getIdentityColumnString in class Dialect

Parameters:

type - the SQL column type, as defined by java.sql.Types

hasDataTypeInIdentityColumn

public boolean hasDataTypeInIdentityColumn()

Description copied from class: Dialect

Whether this dialect have an Identity clause added to the data type or a completely seperate identity data type

Overrides:

hasDataTypeInIdentityColumn in class Dialect

Returns:

boolean

getNoColumnsInsertString

public String getNoColumnsInsertString()

Description copied from class: Dialect

The keyword used to insert a row without specifying any column values. This is not possible on some databases.

Overrides:

getNoColumnsInsertString in class Dialect

getNativeIdentifierGeneratorClass

public Class getNativeIdentifierGeneratorClass()

Overrides:

getNativeIdentifierGeneratorClass in class Dialect

supportsOuterJoinForUpdate

public boolean supportsOuterJoinForUpdate()

Overrides:

supportsOuterJoinForUpdate in class Dialect

useInputStreamToInsertBlob

public boolean useInputStreamToInsertBlob()

Overrides:

useInputStreamToInsertBlob in class Dialect

supportsUnionAll

public boolean supportsUnionAll()

Overrides:

supportsUnionAll in class Dialect

getSelectClauseNullString

public String getSelectClauseNullString(int sqlType)

Workaround for postgres bug #1453

Overrides:

getSelectClauseNullString in class Dialect

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

supportsCurrentTimestampSelection

public boolean supportsCurrentTimestampSelection()

Overrides:

supportsCurrentTimestampSelection in class Dialect

isCurrentTimestampSelectStringCallable

public boolean isCurrentTimestampSelectStringCallable()

Overrides:

isCurrentTimestampSelectStringCallable in class Dialect

getCurrentTimestampSelectString

public String getCurrentTimestampSelectString()

Overrides:

getCurrentTimestampSelectString in class Dialect

toBooleanValueString

public String toBooleanValueString(boolean bool)

Description copied from class: Dialect

The SQL value that the JDBC driver maps boolean values to

Overrides:

toBooleanValueString in class Dialect

getViolatedConstraintNameExtracter

public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter()

Overrides:

getViolatedConstraintNameExtracter in class Dialect