PostgreSQLDialect (Hibernate Core Aggregator 3.6.10.Final API)

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

Direct Known Subclasses:

PostgresPlusDialect
```
public class PostgreSQLDialect
extends Dialect
```
An SQL dialect for Postgres
For discussion of BLOB support in Postgres, as of 8.4, have a peek at http://jdbc.postgresql.org/documentation/84/binary-data.html. For the effects in regards to Hibernate see http://in.relation.to/15492.lace

Author:

Gavin King

Field Summary
- Fields inherited from class org.hibernate.dialect.Dialect
  CLOSED_QUOTE, DEFAULT_BATCH_SIZE, NO_BATCH, QUOTE

Constructor Summary

Constructors
Constructor and Description

PostgreSQLDialect()

Constructors
Constructor and Description
`PostgreSQLDialect()`

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`bindLimitParametersInReverseOrder()` ANSI SQL defines the LIMIT clause to be in the form LIMIT 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)` Typically dialects which support sequences can create a sequence with a single command.
`protected String`	`getCreateSequenceString(String sequenceName, int initialValue, int incrementSize)` Overloaded form of `Dialect.getCreateSequenceString(String)`, additionally taking the initial value and increment size to be applied to the sequence definition.
`String`	`getCreateTemporaryTablePostfix()` Get any fragments needing to be postfixed to the command for temporary table creation.
`String`	`getCreateTemporaryTableString()` Command used to create a temporary table.
`String`	`getCurrentTimestampSelectString()` Retrieve the command used to retrieve the current timestamp from the database.
`String`	`getDropSequenceString(String sequenceName)` Typically dialects which support sequences can drop a sequence with a single command.
`String`	`getForUpdateString()` Get the string to append to SELECT statements to acquire locks for this dialect.
`String`	`getForUpdateString(String aliases)` Get the `FOR UPDATE OF column_list` fragment appropriate for this dialect given the aliases of the columns to be write locked.
`String`	`getIdentityColumnString(int type)` The syntax used during DDL to define a column as being an IDENTITY of a particular type.
`String`	`getIdentitySelectString(String table, String column, int type)` Get the select command to use to retrieve the last generated IDENTITY value for a particular table
`String`	`getLimitString(String sql, boolean hasOffset)` Apply s limit clause to the query.
`Class`	`getNativeIdentifierGeneratorClass()` The class (which implements `IdentifierGenerator`) which acts as this dialects native generation strategy.
`String`	`getNoColumnsInsertString()` The fragment used to insert a row without specifying any column values.
`String`	`getQuerySequencesString()` Get the select command used retrieve the names of all sequences.
`String`	`getReadLockString(int timeout)` Get the string to append to SELECT statements to acquire WRITE locks for this dialect.
`ResultSet`	`getResultSet(CallableStatement ps)` Given a callable statement previously processed by `Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int)`, extract the `ResultSet` from the OUT parameter.
`String`	`getSelectClauseNullString(int sqlType)` Workaround for postgres bug #1453
`String`	`getSelectSequenceNextValString(String sequenceName)` Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.
`String`	`getSequenceNextValString(String sequenceName)` Generate the appropriate select statement to to retrieve the next value of a sequence.
`ViolatedConstraintNameExtracter`	`getViolatedConstraintNameExtracter()`
`String`	`getWriteLockString(int timeout)` Get the string to append to SELECT statements to acquire WRITE locks for this dialect.
`boolean`	`hasDataTypeInIdentityColumn()` Whether this dialect have an Identity clause added to the data type or a completely separate identity data type
`boolean`	`isCurrentTimestampSelectStringCallable()` Should the value returned by `Dialect.getCurrentTimestampSelectString()` be treated as callable.
`int`	`registerResultSetOutParameter(CallableStatement statement, int col)` Registers an OUT parameter which will be returning a `ResultSet`.
`boolean`	`supportsCommentOn()`
`boolean`	`supportsCurrentTimestampSelection()` Does this dialect support a way to retrieve the database's current timestamp value?
`boolean`	`supportsEmptyInList()` Does this dialect support empty IN lists? For example, is [where XYZ in ()] a supported construct?
`boolean`	`supportsExpectedLobUsagePattern()` Expected LOB usage pattern is such that I can perform an insert via prepared statement with a parameter binding for a LOB value without crazy casting to JDBC driver implementation-specific classes...
`boolean`	`supportsIdentityColumns()` Does this dialect support identity column key generation?
`boolean`	`supportsLimit()` Does this dialect support some form of limiting query results via a SQL clause?
`boolean`	`supportsLobValueChangePropogation()` Does the dialect support propagating changes to LOB values back to the database? Talking about mutating the internal value of the locator as opposed to supplying a new locator instance...
`boolean`	`supportsOuterJoinForUpdate()` Does this dialect support `FOR UPDATE` in conjunction with outer joined rows?
`boolean`	`supportsPooledSequences()` Does this dialect support "pooled" sequences.
`boolean`	`supportsSequences()` Does this dialect support sequences?
`boolean`	`supportsTemporaryTables()` Does this dialect support temporary tables?
`boolean`	`supportsTupleDistinctCounts()` Does this dialect support `count(distinct a,b)`?
`boolean`	`supportsUnboundedLobLocatorMaterialization()` Is it supported to materialize a LOB locator outside the transaction in which it was created? Again, part of the trickiness here is the fact that this is largely driver dependent.
`boolean`	`supportsUnionAll()` Does this dialect support UNION ALL, which is generally a faster variant of UNION?
`String`	`toBooleanValueString(boolean bool)` The SQL literal value to which this database maps boolean values.
`boolean`	`useInputStreamToInsertBlob()` Should LOBs (both BLOB and CLOB) be bound using stream operations (i.e.

Methods inherited from class org.hibernate.dialect.Dialect
addTypeOverride, appendIdentitySelectToInsert, appendLockHint, applyLocksToSql, areStringComparisonsCaseInsensitive, bindLimitParametersFirst, buildSQLExceptionConverter, closeQuote, convertToFirstRowValue, createCaseFragment, createOuterJoinFragment, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, dropTemporaryTableAfterUse, forceLimitUsage, forUpdateOfColumns, generateTemporaryTableName, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getCastTypeName, getColumnAliasExtractor, getColumnComment, getCreateMultisetTableString, getCreateSequenceStrings, getCreateSequenceStrings, getCreateTableString, getCrossJoinSeparator, getCurrentTimestampSQLFunctionName, getDefaultProperties, getDialect, getDialect, getDropForeignKeyString, getDropSequenceStrings, getDropTemporaryTableString, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIdentityColumnString, getIdentityInsertString, getIdentitySelectString, getKeywords, getLimitString, getLockingStrategy, getLowercaseFunction, getMaxAliasLength, getNullColumnString, getSelectGUIDString, getTableComment, getTableTypeString, getTypeName, getTypeName, getTypeOverrides, hasAlterTable, hasSelfReferentialForeignKeyBug, isLockTimeoutParameterized, openQuote, performTemporaryTableDDLInIsolation, qualifyIndexName, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, replaceResultVariableInOrderByClauseWithPosition, requiresCastingOfParametersInSelectClause, supportsBindAsCallableArgument, supportsCascadeDelete, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsExistsInSelect, supportsIfExistsAfterTableName, supportsIfExistsBeforeTableName, supportsInsertSelectIdentity, supportsLimitOffset, supportsLockTimeouts, supportsNotNullUnique, supportsParametersInInsertSelect, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsRowValueConstructorSyntax, supportsRowValueConstructorSyntaxInInList, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTupleCounts, 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
    
    Returns:
    The "add column" fragment.
  - getSequenceNextValString
```
public String getSequenceNextValString(String sequenceName)
```
    Description copied from class: Dialect
    
    Generate the appropriate select statement to to retrieve the next value of a sequence.
    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 retrieve the next value of a sequence as part of another (typically DML) statement.
    This differs from Dialect.getSequenceNextValString(String) in that this should return an expression usable within another statement.
    
    Overrides:
    
    getSelectSequenceNextValString in class Dialect
    
    Parameters:
    sequenceName - the name of the sequence
    
    Returns:
    The "nextval" fragment.
  - getCreateSequenceString
```
public String getCreateSequenceString(String sequenceName)
```
    Description copied from class: Dialect
    
    Typically dialects which support sequences can create a sequence with a single command. This is convenience form of Dialect.getCreateSequenceStrings(java.lang.String) to help facilitate that.
    Dialects which support sequences and can create a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to create a sequence should instead override Dialect.getCreateSequenceStrings(java.lang.String).
    
    Overrides:
    
    getCreateSequenceString in class Dialect
    
    Parameters:
    sequenceName - The name of the sequence
    
    Returns:
    The sequence creation command
  - getDropSequenceString
```
public String getDropSequenceString(String sequenceName)
```
    Description copied from class: Dialect
    
    Typically dialects which support sequences can drop a sequence with a single command. This is convenience form of Dialect.getDropSequenceStrings(java.lang.String) to help facilitate that.
    Dialects which support sequences and can drop a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to drop a sequence should instead override Dialect.getDropSequenceStrings(java.lang.String).
    
    Overrides:
    
    getDropSequenceString in class Dialect
    
    Parameters:
    sequenceName - The name of the sequence
    
    Returns:
    The sequence drop commands
  - 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:
    True if constraints must be dropped prior to dropping the table; false otherwise.
  - supportsSequences
```
public boolean supportsSequences()
```
    Description copied from class: Dialect
    
    Does this dialect support sequences?
    
    Overrides:
    
    supportsSequences in class Dialect
    
    Returns:
    True if sequences supported; false otherwise.
  - getQuerySequencesString
```
public String getQuerySequencesString()
```
    Description copied from class: Dialect
    
    Get the select command used retrieve the names of all sequences.
    
    Overrides:
    
    getQuerySequencesString in class Dialect
    
    Returns:
    The select command; or null if sequences are not supported.
    See Also:
    SchemaUpdate
  - supportsLimit
```
public boolean supportsLimit()
```
    Description copied from class: Dialect
    
    Does this dialect support some form of limiting query results via a SQL clause?
    
    Overrides:
    
    supportsLimit in class Dialect
    
    Returns:
    True if this dialect supports some form of LIMIT.
  - getLimitString
```
public String getLimitString(String sql,
                    boolean hasOffset)
```
    Description copied from class: Dialect
    
    Apply s limit clause to the query.
    Typically dialects utilize variable limit clauses when they support limits. Thus, when building the select command we do not actually need to know the limit or the offest since we will just be using placeholders.
    Here we do still pass along whether or not an offset was specified so that dialects not supporting offsets can generate proper exceptions. In general, dialects will override one or the other of this method and Dialect.getLimitString(String, int, int).
    
    Overrides:
    
    getLimitString in class Dialect
    
    Parameters:
    sql - The query to which to apply the limit.
    hasOffset - Is the query requesting an offset?
    
    Returns:
    the modified SQL
  - bindLimitParametersInReverseOrder
```
public boolean bindLimitParametersInReverseOrder()
```
    Description copied from class: Dialect
    
    ANSI SQL defines the LIMIT clause to be in the form LIMIT offset, limit. Does this dialect require us to bind the parameters in reverse order?
    
    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:
    True if IDENTITY columns are supported; false otherwise.
  - getForUpdateString
```
public String getForUpdateString(String aliases)
```
    Description copied from class: Dialect
    
    Get the FOR UPDATE OF column_list fragment appropriate for this dialect given the aliases of the columns to be write locked.
    
    Overrides:
    
    getForUpdateString in class Dialect
    
    Parameters:
    aliases - The columns to be write locked.
    
    Returns:
    The appropriate FOR UPDATE OF column_list clause string.
  - getIdentitySelectString
```
public String getIdentitySelectString(String table,
                             String column,
                             int type)
```
    Description copied from class: Dialect
    
    Get the select command to use to retrieve the last generated IDENTITY value for a particular table
    
    Overrides:
    
    getIdentitySelectString in class Dialect
    
    Parameters:
    table - The table into which the insert was done
    column - The PK column.
    type - The Types type code.
    
    Returns:
    The appropriate select command
  - getIdentityColumnString
```
public String getIdentityColumnString(int type)
```
    Description copied from class: Dialect
    
    The syntax used during DDL to define a column as being an IDENTITY of a particular type.
    
    Overrides:
    
    getIdentityColumnString in class Dialect
    
    Parameters:
    type - The Types type code.
    
    Returns:
    The appropriate DDL fragment.
  - hasDataTypeInIdentityColumn
```
public boolean hasDataTypeInIdentityColumn()
```
    Description copied from class: Dialect
    
    Whether this dialect have an Identity clause added to the data type or a completely separate identity data type
    
    Overrides:
    
    hasDataTypeInIdentityColumn in class Dialect
    
    Returns:
    boolean
  - getNoColumnsInsertString
```
public String getNoColumnsInsertString()
```
    Description copied from class: Dialect
    
    The fragment used to insert a row without specifying any column values. This is not possible on some databases.
    
    Overrides:
    
    getNoColumnsInsertString in class Dialect
    
    Returns:
    The appropriate empty values clause.
  - getNativeIdentifierGeneratorClass
```
public Class getNativeIdentifierGeneratorClass()
```
    Description copied from class: Dialect
    
    The class (which implements IdentifierGenerator) which acts as this dialects native generation strategy.
    Comes into play whenever the user specifies the native generator.
    
    Overrides:
    
    getNativeIdentifierGeneratorClass in class Dialect
    
    Returns:
    The native generator class.
  - supportsOuterJoinForUpdate
```
public boolean supportsOuterJoinForUpdate()
```
    Description copied from class: Dialect
    
    Does this dialect support FOR UPDATE in conjunction with outer joined rows?
    
    Overrides:
    
    supportsOuterJoinForUpdate in class Dialect
    
    Returns:
    True if outer joined rows can be locked via FOR UPDATE.
  - useInputStreamToInsertBlob
```
public boolean useInputStreamToInsertBlob()
```
    Description copied from class: Dialect
    
    Should LOBs (both BLOB and CLOB) be bound using stream operations (i.e. PreparedStatement.setBinaryStream(int, java.io.InputStream, int)).
    
    Overrides:
    
    useInputStreamToInsertBlob in class Dialect
    
    Returns:
    True if BLOBs and CLOBs should be bound using stream operations.
  - supportsUnionAll
```
public boolean supportsUnionAll()
```
    Description copied from class: Dialect
    
    Does this dialect support UNION ALL, which is generally a faster variant of UNION?
    
    Overrides:
    
    supportsUnionAll in class Dialect
    
    Returns:
    True if UNION ALL is supported; false otherwise.
  - getSelectClauseNullString
```
public String getSelectClauseNullString(int sqlType)
```
    Workaround for postgres bug #1453
    
    Overrides:
    
    getSelectClauseNullString in class Dialect
    
    Parameters:
    sqlType - The Types type code.
    
    Returns:
    The appropriate select clause value fragment.
  - supportsCommentOn
```
public boolean supportsCommentOn()
```
    Overrides:
    
    supportsCommentOn in class Dialect
  - supportsTemporaryTables
```
public boolean supportsTemporaryTables()
```
    Description copied from class: Dialect
    
    Does this dialect support temporary tables?
    
    Overrides:
    
    supportsTemporaryTables in class Dialect
    
    Returns:
    True if temp tables are supported; false otherwise.
  - getCreateTemporaryTableString
```
public String getCreateTemporaryTableString()
```
    Description copied from class: Dialect
    
    Command used to create a temporary table.
    
    Overrides:
    
    getCreateTemporaryTableString in class Dialect
    
    Returns:
    The command used to create a temporary table.
  - getCreateTemporaryTablePostfix
```
public String getCreateTemporaryTablePostfix()
```
    Description copied from class: Dialect
    
    Get any fragments needing to be postfixed to the command for temporary table creation.
    
    Overrides:
    
    getCreateTemporaryTablePostfix in class Dialect
    
    Returns:
    Any required postfix.
  - supportsCurrentTimestampSelection
```
public boolean supportsCurrentTimestampSelection()
```
    Description copied from class: Dialect
    
    Does this dialect support a way to retrieve the database's current timestamp value?
    
    Overrides:
    
    supportsCurrentTimestampSelection in class Dialect
    
    Returns:
    True if the current timestamp can be retrieved; false otherwise.
  - isCurrentTimestampSelectStringCallable
```
public boolean isCurrentTimestampSelectStringCallable()
```
    Description copied from class: Dialect
    
    Should the value returned by Dialect.getCurrentTimestampSelectString() be treated as callable. Typically this indicates that JDBC escape syntax is being used...
    
    Overrides:
    
    isCurrentTimestampSelectStringCallable in class Dialect
    
    Returns:
    True if the Dialect.getCurrentTimestampSelectString() return is callable; false otherwise.
  - getCurrentTimestampSelectString
```
public String getCurrentTimestampSelectString()
```
    Description copied from class: Dialect
    
    Retrieve the command used to retrieve the current timestamp from the database.
    
    Overrides:
    
    getCurrentTimestampSelectString in class Dialect
    
    Returns:
    The command.
  - supportsTupleDistinctCounts
```
public boolean supportsTupleDistinctCounts()
```
    Description copied from class: Dialect
    
    Does this dialect support `count(distinct a,b)`?
    
    Overrides:
    
    supportsTupleDistinctCounts in class Dialect
    
    Returns:
    True if the database supports counting disintct tuples; false otherwise.
  - toBooleanValueString
```
public String toBooleanValueString(boolean bool)
```
    Description copied from class: Dialect
    
    The SQL literal value to which this database maps boolean values.
    
    Overrides:
    
    toBooleanValueString in class Dialect
    
    Parameters:
    bool - The boolean value
    
    Returns:
    The appropriate SQL literal.
  - getViolatedConstraintNameExtracter
```
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter()
```
    Overrides:
    
    getViolatedConstraintNameExtracter in class Dialect
  - registerResultSetOutParameter
```
public int registerResultSetOutParameter(CallableStatement statement,
                                int col)
                                  throws SQLException
```
    Description copied from class: Dialect
    
    Registers an OUT parameter which will be returning a ResultSet. How this is accomplished varies greatly from DB to DB, hence its inclusion (along with Dialect.getResultSet(java.sql.CallableStatement)) here.
    
    Overrides:
    
    registerResultSetOutParameter in class Dialect
    
    Parameters:
    statement - The callable statement.
    col - The bind position at which to register the OUT param.
    
    Returns:
    The number of (contiguous) bind positions used.
    
    Throws:
    
    SQLException - Indicates problems registering the OUT param.
  - getResultSet
```
public ResultSet getResultSet(CallableStatement ps)
                       throws SQLException
```
    Description copied from class: Dialect
    
    Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the OUT parameter.
    
    Overrides:
    
    getResultSet in class Dialect
    
    Parameters:
    ps - The callable statement.
    
    Returns:
    The extracted result set.
    
    Throws:
    
    SQLException - Indicates problems extracting the result set.
  - supportsPooledSequences
```
public boolean supportsPooledSequences()
```
    Description copied from class: Dialect
    
    Does this dialect support "pooled" sequences. Not aware of a better name for this. Essentially can we specify the initial and increment values?
    
    Overrides:
    
    supportsPooledSequences in class Dialect
    
    Returns:
    True if such "pooled" sequences are supported; false otherwise.
    See Also:
    Dialect.getCreateSequenceStrings(String, int, int), Dialect.getCreateSequenceString(String, int, int)
  - getCreateSequenceString
```
protected String getCreateSequenceString(String sequenceName,
                             int initialValue,
                             int incrementSize)
```
    Description copied from class: Dialect
    
    Overloaded form of Dialect.getCreateSequenceString(String), additionally taking the initial value and increment size to be applied to the sequence definition.
    The default definition is to suffix Dialect.getCreateSequenceString(String) with the string: " start with {initialValue} increment by {incrementSize}" where {initialValue} and {incrementSize} are replacement placeholders. Generally dialects should only need to override this method if different key phrases are used to apply the allocation information.
    
    Overrides:
    
    getCreateSequenceString in class Dialect
    
    Parameters:
    sequenceName - The name of the sequence
    initialValue - The initial value to apply to 'create sequence' statement
    incrementSize - The increment value to apply to 'create sequence' statement
    
    Returns:
    The sequence creation command
  - supportsEmptyInList
```
public boolean supportsEmptyInList()
```
    Description copied from class: Dialect
    
    Does this dialect support empty IN lists?
    For example, is [where XYZ in ()] a supported construct?
    
    Overrides:
    
    supportsEmptyInList in class Dialect
    
    Returns:
    True if empty in lists are supported; false otherwise.
  - supportsExpectedLobUsagePattern
```
public boolean supportsExpectedLobUsagePattern()
```
    Description copied from class: Dialect
    
    Expected LOB usage pattern is such that I can perform an insert via prepared statement with a parameter binding for a LOB value without crazy casting to JDBC driver implementation-specific classes...
    Part of the trickiness here is the fact that this is largely driver dependent. For example, Oracle (which is notoriously bad with LOB support in their drivers historically) actually does a pretty good job with LOB support as of the 10.2.x versions of their drivers...
    
    Overrides:
    
    supportsExpectedLobUsagePattern in class Dialect
    
    Returns:
    True if normal LOB usage patterns can be used with this driver; false if driver-specific hookiness needs to be applied.
  - supportsLobValueChangePropogation
```
public boolean supportsLobValueChangePropogation()
```
    Description copied from class: Dialect
    
    Does the dialect support propagating changes to LOB values back to the database? Talking about mutating the internal value of the locator as opposed to supplying a new locator instance...
    For BLOBs, the internal value might be changed by: Blob.setBinaryStream(long), Blob.setBytes(long, byte[]), Blob.setBytes(long, byte[], int, int), or Blob.truncate(long).
    For CLOBs, the internal value might be changed by: Clob.setAsciiStream(long), Clob.setCharacterStream(long), Clob.setString(long, String), Clob.setString(long, String, int, int), or Clob.truncate(long).
    NOTE : I do not know the correct answer currently for databases which (1) are not part of the cruise control process or (2) do not Dialect.supportsExpectedLobUsagePattern().
    
    Overrides:
    
    supportsLobValueChangePropogation in class Dialect
    
    Returns:
    True if the changes are propagated back to the database; false otherwise.
  - supportsUnboundedLobLocatorMaterialization
```
public boolean supportsUnboundedLobLocatorMaterialization()
```
    Description copied from class: Dialect
    
    Is it supported to materialize a LOB locator outside the transaction in which it was created?
    Again, part of the trickiness here is the fact that this is largely driver dependent.
    NOTE: all database I have tested which Dialect.supportsExpectedLobUsagePattern() also support the ability to materialize a LOB outside the owning transaction...
    
    Overrides:
    
    supportsUnboundedLobLocatorMaterialization in class Dialect
    
    Returns:
    True if unbounded materialization is supported; false otherwise.
  - getForUpdateString
```
public String getForUpdateString()
```
    Description copied from class: Dialect
    
    Get the string to append to SELECT statements to acquire locks for this dialect.
    
    Overrides:
    
    getForUpdateString in class Dialect
    
    Returns:
    The appropriate FOR UPDATE clause string.
  - getWriteLockString
```
public String getWriteLockString(int timeout)
```
    Description copied from class: Dialect
    
    Get the string to append to SELECT statements to acquire WRITE locks for this dialect. Location of the of the returned string is treated the same as getForUpdateString.
    
    Overrides:
    
    getWriteLockString in class Dialect
    
    Parameters:
    timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
    
    Returns:
    The appropriate LOCK clause string.
  - getReadLockString
```
public String getReadLockString(int timeout)
```
    Description copied from class: Dialect
    
    Get the string to append to SELECT statements to acquire WRITE locks for this dialect. Location of the of the returned string is treated the same as getForUpdateString.
    
    Overrides:
    
    getReadLockString in class Dialect
    
    Parameters:
    timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
    
    Returns:
    The appropriate LOCK clause string.

Class PostgreSQLDialect

Field Summary

Fields inherited from class org.hibernate.dialect.Dialect

Constructor Summary

Method Summary

Methods inherited from class org.hibernate.dialect.Dialect

Methods inherited from class java.lang.Object

Constructor Detail

PostgreSQLDialect

Method Detail

getAddColumnString

getSequenceNextValString

getSelectSequenceNextValString

getCreateSequenceString

getDropSequenceString

getCascadeConstraintsString

dropConstraints

supportsSequences

getQuerySequencesString

supportsLimit

getLimitString

bindLimitParametersInReverseOrder

supportsIdentityColumns

getForUpdateString

getIdentitySelectString

getIdentityColumnString

hasDataTypeInIdentityColumn

getNoColumnsInsertString

getNativeIdentifierGeneratorClass

supportsOuterJoinForUpdate

useInputStreamToInsertBlob

supportsUnionAll

getSelectClauseNullString

supportsCommentOn

supportsTemporaryTables

getCreateTemporaryTableString

getCreateTemporaryTablePostfix

supportsCurrentTimestampSelection

isCurrentTimestampSelectStringCallable

getCurrentTimestampSelectString

supportsTupleDistinctCounts

toBooleanValueString

getViolatedConstraintNameExtracter

registerResultSetOutParameter

getResultSet

supportsPooledSequences

getCreateSequenceString

supportsEmptyInList

supportsExpectedLobUsagePattern

supportsLobValueChangePropogation

supportsUnboundedLobLocatorMaterialization

getForUpdateString

getWriteLockString

getReadLockString