Package org.hibernate.dialect

Class PostgreSQLDialect

java.lang.Object

org.hibernate.dialect.Dialect

org.hibernate.dialect.PostgreSQLDialect

All Implemented Interfaces:

FunctionContributor, TypeContributor, ConversionContext

Direct Known Subclasses:

PostgresPlusDialect

public class PostgreSQLDialect
extends Dialect

A SQL dialect for PostgreSQL 12 and above.

Please refer to the PostgreSQL documentation.

Nested Class Summary

Nested classes/interfaces inherited from class org.hibernate.dialect.Dialect

Dialect.SizeStrategy, Dialect.SizeStrategyImpl

Field Summary

Fields

Modifier and Type	Field	Description
protected final PostgreSQLDriverKind	driverKind
protected static final DatabaseVersion	MINIMUM_VERSION

Fields inherited from class org.hibernate.dialect.Dialect

CLOSED_QUOTE, FALSE_STRING_VALUES, LEGACY_LOB_MERGE_STRATEGY, LOG_BASE2OF10, NEW_LOCATOR_LOB_MERGE_STRATEGY, QUOTE, STANDARD_MULTI_KEY_LOAD_SIZING_STRATEGY, STREAM_XFER_LOB_MERGE_STRATEGY, TRUE_STRING_VALUES

Constructor Summary

Constructors

Constructor	Description
PostgreSQLDialect()
PostgreSQLDialect(DatabaseVersion version)
PostgreSQLDialect(DatabaseVersion version, PostgreSQLDriverKind driverKind)
PostgreSQLDialect(DialectResolutionInfo info)

Method Summary

Modifier and Type	Method	Description
String	addSqlHintOrComment(String sql, QueryOptions queryOptions, boolean commentsEnabled)	Modify the SQL, adding hints or comments, if necessary.
void	appendBinaryLiteral(SqlAppender appender, byte[] bytes)	Append a binary literal to the given SqlAppender.
void	appendBooleanValueString(SqlAppender appender, boolean bool)	Append the SQL literal expression representing the given boolean value to the given SqlAppender.
void	appendDatetimeFormat(SqlAppender appender, String format)	Translate the given datetime format string from the pattern language defined by Java's DateTimeFormatter to whatever pattern language is understood by the native datetime formatting function for this database (often the to_char() function).
void	appendDateTimeLiteral(SqlAppender appender, TemporalAccessor temporalAccessor, TemporalType precision, TimeZone jdbcTimeZone)	Append a datetime literal representing the given java.time value to the given SqlAppender.
void	appendDateTimeLiteral(SqlAppender appender, Calendar calendar, TemporalType precision, TimeZone jdbcTimeZone)	Append a datetime literal representing the given Calendar value to the given SqlAppender.
void	appendDateTimeLiteral(SqlAppender appender, Date date, TemporalType precision, TimeZone jdbcTimeZone)	Append a datetime literal representing the given Date value to the given SqlAppender.
void	augmentRecognizedTableTypes(List<String> tableTypesList)
IdentifierHelper	buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData)	The IdentifierHelper indicated by this dialect for handling identifier conversions.
SQLExceptionConversionDelegate	buildSQLExceptionConversionDelegate()	An instance of SQLExceptionConversionDelegate for interpreting dialect-specific error or SQLState codes.
boolean	canBatchTruncate()	Does the truncate table statement accept multiple tables?
String	castPattern(CastType from, CastType to)	Obtain a pattern for the SQL equivalent to a cast() function call.
protected String	castType(int sqlTypeCode)	The SQL type to use in cast( ... as ... ) expressions when casting to the target type represented by the given JDBC type code.
protected String	columnType(int sqlTypeCode)	The database column type name for a given JDBC type code defined in Types or SqlTypes.
protected void	contributePostgreSQLTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)	Allow for extension points to override this only
void	contributeTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)	A callback which allows the Dialect to contribute types.
MutationOperation	createOptionalTableUpdateOperation(EntityMutationTarget mutationTarget, OptionalTableUpdate optionalTableUpdate, SessionFactoryImplementor factory)	Create a MutationOperation for a updating an optional table
String	currentTime()	Translation of the HQL/JPQL current_time function, which maps to the Java type Time which is a time with no time zone.
String	currentTimestamp()	Translation of the HQL/JPQL current_timestamp function, which maps to the Java type Timestamp which is a datetime with no time zone.
String	currentTimestampWithTimeZone()	Translation of the HQL offset_datetime function, which maps to the Java type OffsetDateTime which is a datetime with a time zone.
Replacer	datetimeFormat(String format)
String	extractPattern(TemporalUnit unit)	The extract() function returns TemporalUnit.DAY_OF_WEEK numbered from 0 to 6.
AggregateSupport	getAggregateSupport()	How does this dialect support aggregate types like SqlTypes.STRUCT.
String	getAlterColumnTypeString(String columnName, String columnType, String columnDefinition)	The fragment of an alter table command which modifies a column type, or null if column types cannot be modified.
String	getBeforeDropStatement()	A command to execute before dropping tables.
CallableStatementSupport	getCallableStatementSupport()	The CallableStatementSupport for this database.
String	getCascadeConstraintsString()	The keyword that specifies that a drop table operation should be cascaded to its constraints, typically " cascade" where the leading space is required, or the empty string if there is no such keyword in this dialect.
String	getCaseInsensitiveLike()	The name of the SQL operator that performs case-insensitive LIKE comparisons.
String[]	getCreateEnumTypeCommand(String name, String[] values)
String	getCurrentSchemaCommand()	Get the SQL command used to retrieve the current schema name.
String	getCurrentTimestampSelectString()	The command used to retrieve the current timestamp from the database.
int	getDefaultIntervalSecondScale()	This is the default scale for a generated column of type INTERVAL SECOND mapped to a Duration.
boolean	getDefaultNonContextualLobCreation()	The default value to use for the configuration property "hibernate.jdbc.lob.non_contextual_creation".
@Nullable String	getDefaultOrdinalityColumnName()	Returns the default name of the ordinality column for a set-returning function if it supports that, otherwise returns null.
int	getDefaultStatementBatchSize()	The default value to use for the configuration property "hibernate.jdbc.batch_size".
DmlTargetColumnQualifierSupport	getDmlTargetColumnQualifierSupport()	Get the minimum DmlTargetColumnQualifierSupport required by this dialect.
String[]	getDropEnumTypeCommand(String name)
String	getEnumTypeDeclaration(String name, String[] values)	If this database has a special MySQL-style enum column type, return the type declaration for the given enumeration of values.
SqmMultiTableInsertStrategy	getFallbackSqmInsertStrategy(EntityMappingType rootEntityDescriptor, RuntimeModelCreationContext runtimeModelCreationContext)	The SqmMultiTableInsertStrategy to use when not specified by QueryEngineOptions.getCustomSqmMultiTableInsertStrategy().
SqmMultiTableMutationStrategy	getFallbackSqmMutationStrategy(EntityMappingType rootEntityDescriptor, RuntimeModelCreationContext runtimeModelCreationContext)	The SqmMultiTableMutationStrategy to use when not specified by QueryEngineOptions.getCustomSqmMultiTableMutationStrategy().
String	getForUpdateNowaitString()	Retrieves the FOR UPDATE NOWAIT syntax specific to this dialect.
String	getForUpdateNowaitString(String aliases)	Get the FOR UPDATE OF column_list NOWAIT fragment appropriate for this dialect, given the aliases of the columns to be write locked.
String	getForUpdateSkipLockedString()	Retrieves the FOR UPDATE SKIP LOCKED syntax specific to this dialect.
String	getForUpdateSkipLockedString(String aliases)	Get the FOR UPDATE OF column_list SKIP LOCKED fragment appropriate for this dialect, given the aliases of the columns to be write locked.
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	getForUpdateString(String aliases, LockOptions lockOptions)	Get the FOR UPDATE OF or FOR SHARE OF fragment appropriate for this dialect, given the aliases of the columns to be locked.
long	getFractionalSecondPrecisionInNanos()	microsecond is the smallest unit for an interval, and the highest precision for a timestamp, so we could use it as the "native" precision, but it's more convenient to use whole seconds (with the fractional part), since we want to use extract(epoch from ...) in our emulation of timestampdiff().
FunctionalDependencyAnalysisSupport	getFunctionalDependencyAnalysisSupport()	Get this dialect's level of support for primary key functional dependency analysis within GROUP BY and ORDER BY clauses.
SelectItemReferenceStrategy	getGroupBySelectItemReferenceStrategy()	Determine how selected items are referenced in the group by clause.
IdentityColumnSupport	getIdentityColumnSupport()	Get the appropriate IdentityColumnSupport for this dialect.
LimitHandler	getLimitHandler()	Obtain a LimitHandler that implements pagination support for Query.setMaxResults(int) and Query.setFirstResult(int).
int	getMaxIdentifierLength()	What is the maximum identifier length supported by this dialect?
int	getMaxVarbinaryLength()	The biggest size value that can be supplied as argument to a Types.VARBINARY-like type.
int	getMaxVarcharCapacity()	The longest possible length of a Types.VARCHAR-like column.
int	getMaxVarcharLength()	The biggest size value that can be supplied as argument to a Types.VARCHAR-like type.
protected DatabaseVersion	getMinimumSupportedVersion()	Get the version of the SQL dialect that is the minimum supported by this implementation.
NameQualifierSupport	getNameQualifierSupport()	The support for qualified identifiers.
NationalizationSupport	getNationalizationSupport()	Determines whether this database requires the use of explicitly nationalized character (Unicode) data types.
ParameterMarkerStrategy	getNativeParameterMarkerStrategy()	Support for native parameter markers.
GenerationType	getNativeValueGenerationStrategy()	The native type of generation supported by this Dialect.
String	getNoColumnsInsertString()	The fragment used to insert a row without specifying any column values, usually just (), but sometimes default values.
String	getQueryHintString(String sql, String hints)	Apply a hint to the given SQL query.
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 READ locks for this dialect.
String	getReadLockString(String aliases, int timeout)	Get the string to append to SELECT statements to acquire READ locks for this dialect, given the aliases of the columns to be read locked.
ResultSet	getResultSet(CallableStatement ps)	Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the OUT parameter.
ResultSet	getResultSet(CallableStatement statement, int position)	Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the positional OUT parameter.
ResultSet	getResultSet(CallableStatement statement, String name)	Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the named OUT parameter.
String	getSelectClauseNullString(int sqlType, TypeConfiguration typeConfiguration)	Given a JDBC type code, return the expression for a literal null value of that type, to use in a select clause.
SequenceSupport	getSequenceSupport()	Get the appropriate SequenceSupport for this dialect.
SqlAstTranslatorFactory	getSqlAstTranslatorFactory()	Return a SqlAstTranslatorFactory specific to this dialect, or null to use the standard translator.
Exporter<Table>	getTableExporter()	Get an Exporter for Tables, usually StandardTableExporter.
TimeZoneSupport	getTimeZoneSupport()	How the dialect supports time zone types like Types.TIMESTAMP_WITH_TIMEZONE.
UniqueDelegate	getUniqueDelegate()	Get the UniqueDelegate supported by this dialect
ViolatedConstraintNameExtractor	getViolatedConstraintNameExtractor()	A ViolatedConstraintNameExtractor for extracting the name of a violated constraint from a SQLException.
String	getWriteLockString(int timeout)	Get the string to append to SELECT statements to acquire pessimistic WRITE locks for this dialect.
String	getWriteLockString(String aliases, int timeout)	Get the string to append to SELECT statements to acquire WRITE locks for this dialect, given the aliases of the columns to be write locked.
RowLockStrategy	getWriteRowLockStrategy()	The row lock strategy to use for write locks.
void	initializeFunctionRegistry(FunctionContributions functionContributions)	Initialize the given registry with any dialect-specific functions.
boolean	isCurrentTimestampSelectStringCallable()	Is the command returned by Dialect.getCurrentTimestampSelectString() treated as callable?
boolean	qualifyIndexName()	Do we need to qualify index names with the schema name?
String	quoteCollation(String collation)	Quote the given collation name if necessary.
protected void	registerColumnTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)	Register ANSI-standard column types using the length limits defined by Dialect.getMaxVarcharLength(), Dialect.getMaxNVarcharLength(), and Dialect.getMaxVarbinaryLength().
int	registerResultSetOutParameter(CallableStatement statement, int col)	Registers a parameter capable of returning a ResultSet by position, either an OUT parameter, or a REF_CURSOR parameter as defined in Java 8.
boolean	requiresParensForTupleDistinctCounts()	If Dialect.supportsTupleDistinctCounts() is true, does this dialect require the tuple to be delimited with parentheses?
protected Integer	resolveSqlTypeCode(String columnTypeName, TypeConfiguration typeConfiguration)	Resolves the SqlTypes type code for the given column type name as reported by the database, or null if it can't be resolved.
JdbcType	resolveSqlTypeDescriptor(String columnTypeName, int jdbcTypeCode, int precision, int scale, JdbcTypeRegistry jdbcTypeRegistry)	Assigns an appropriate JdbcType to a column of a JDBC result set based on the column type name, JDBC type code, precision, and scale.
String	rowId(String rowId)	The name of a rowid-like pseudo-column which acts as a high-performance row locator, or null if this dialect has no such pseudo-column.
int	rowIdSqlType()	The JDBC type code of the rowid-like pseudo-column which acts as a high-performance row locator.
boolean	supportsAlterColumnType()	Does this dialect support modifying the type of an existing column?
boolean	supportsBindingNullSqlTypeForSetNull()	Does this dialect support binding Types.NULL for PreparedStatement.setNull(int, int)? if it does, then call of PreparedStatement.getParameterMetaData() could be eliminated for better performance.
boolean	supportsCaseInsensitiveLike()	Does this dialect support case-insensitive LIKE comparisons?
boolean	supportsCommentOn()	Does this dialect support commenting on tables and columns?
boolean	supportsConflictClauseForInsertCTE()	Does this dialect support the conflict clause for insert statements that appear in a CTE?
boolean	supportsCurrentTimestampSelection()	Does this dialect support some way to retrieve the current timestamp value from the database?
boolean	supportsDistinctFromPredicate()	Does this dialect support some kind of distinct from predicate?
boolean	supportsFetchClause(FetchClauseType type)	Does this dialect support the given FETCH clause type.
boolean	supportsFromClauseInUpdate()	Does this dialect support the from clause for update statements?
boolean	supportsIfExistsAfterAlterTable()	For an alter table, can the phrase if exists be applied?
boolean	supportsIfExistsBeforeConstraintName()	For dropping a constraint with an alter table statement, can the phrase if exists be applied before the constraint name?
boolean	supportsIfExistsBeforeTableName()	For dropping a table, can the phrase if exists be applied before the table name?
boolean	supportsIfExistsBeforeTypeName()	For dropping a type, can the phrase if exists be applied before the type name?
boolean	supportsInsertReturning()	Does this dialect fully support returning arbitrary generated column values after execution of an insert statement, using native SQL syntax?
boolean	supportsIsTrue()	Does this dialect support the is true and is false operators?
boolean	supportsJdbcConnectionLobCreation(DatabaseMetaData databaseMetaData)	Check whether the JDBC Connection supports creating LOBs via Connection.createBlob(), Connection.createNClob(), or Connection.createClob().
boolean	supportsLateral()	Does this dialect support the SQL lateral keyword or a proprietary alternative?
boolean	supportsLobValueChangePropagation()	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	supportsMaterializedLobAccess()	Check whether the JDBC driver allows setting LOBs via PreparedStatement.setBytes(int, byte[]), PreparedStatement.setNString(int, String), or PreparedStatement.setString(int, String) APIs.
protected boolean	supportsMinMaxOnUuid()	Whether PostgreSQL supports min(uuid)/max(uuid), which it doesn't by default.
boolean	supportsNonQueryWithCTE()	Does this dialect support insert, update, and delete statements with Common Table Expressions (CTEs)?
boolean	supportsNoWait()	Does this dialect support NO_WAIT timeout.
boolean	supportsOffsetInSubquery()	Does this dialect support offset in subqueries?
boolean	supportsOuterJoinForUpdate()	Does this dialect support FOR UPDATE in conjunction with outer-joined rows?
boolean	supportsPartitionBy()	Does is dialect support partition by?
boolean	supportsRecursiveCTE()	Does this dialect/database support recursive CTEs?
boolean	supportsSkipLocked()	Does this dialect support SKIP_LOCKED timeout.
boolean	supportsStandardArrays()	Does this database have native support for ANSI SQL standard arrays which are expressed in terms of the element type name: integer array.
boolean	supportsTemporalLiteralOffset()	Does this dialect supports timezone offsets in temporal literals.
boolean	supportsTupleCounts()	Does this dialect support count(a,b)?
boolean	supportsUnboundedLobLocatorMaterialization()	Is it supported to materialize a LOB locator outside the transaction in which it was created?
boolean	supportsValuesList()	Does this dialect support values lists of form VALUES (1), (2), (3)?
boolean	supportsWait()	Does this dialect support WAIT timeout.
boolean	supportsWindowFunctions()	Does this dialect support window functions like row_number() over (..)?
String	timestampaddPattern(TemporalUnit unit, TemporalType temporalType, IntervalType intervalType)	Obtain a pattern for the SQL equivalent to a timestampadd() function call.
String	timestampdiffPattern(TemporalUnit unit, TemporalType fromTemporalType, TemporalType toTemporalType)	Obtain a pattern for the SQL equivalent to a timestampdiff() function call.
String	translateExtractField(TemporalUnit unit)	Return the name used to identify the given field as an argument to the extract() function, or of this dialect's equivalent function.
boolean	useConnectionToCreateLob()	Should Blob, Clob, and NClob be created solely using Connection.createBlob(), Connection.createClob(), and Connection.createNClob(), instead of allowing the use of our own implementations.
boolean	useInputStreamToInsertBlob()	Should LOBs (both BLOB and CLOB) be bound using stream operations, that is, using PreparedStatement.setBinaryStream(int, java.io.InputStream, int)).

Methods inherited from class org.hibernate.dialect.Dialect

addUseIndexQueryHint, appendArrayLiteral, appendCheckConstraintOptions, appendIntervalLiteral, appendIntervalLiteral, appendLiteral, appendLockHint, appendUUIDLiteral, applyLocksToSql, augmentPhysicalTableTypes, buildStringToBooleanCast, buildStringToBooleanCastDecode, buildStringToBooleanDecode, canCreateCatalog, canCreateSchema, canDisableConstraints, checkVersion, closeQuote, contribute, contributeFunctions, currentDate, currentLocalTime, currentLocalTimestamp, defaultScrollMode, determineDatabaseVersion, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, doesRoundTemporalOnOverflow, dropConstraints, equivalentTypes, escapeComment, forceLobAsLastValue, generatedAs, getAddColumnString, getAddColumnSuffixString, getAddForeignKeyConstraintString, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getAlterTableString, getArrayTypeName, getAuxiliaryDatabaseObjectExporter, getBatchLoadSizingStrategy, getCheckCondition, getCheckCondition, getCheckCondition, getCheckCondition, getCheckCondition, getCheckCondition, getCheckConstraintString, getColumnAliasExtractor, getColumnComment, getCreateCatalogCommand, getCreateEnumTypeCommand, getCreateIndexString, getCreateIndexTail, getCreateMultisetTableString, getCreateSchemaCommand, getCreateTableString, getCreateTemporaryTableColumnAnnotation, getCreateUserDefinedTypeExtensionsString, getCreateUserDefinedTypeKindString, getCrossReferenceParentTableFilter, getDefaultDecimalPrecision, getDefaultLobLength, getDefaultProperties, getDefaultTimestampPrecision, getDefaultUseGetGeneratedKeys, getDisableConstraintsStatement, getDisableConstraintStatement, getDoublePrecision, getDropCatalogCommand, getDropEnumTypeCommand, getDropForeignKeyString, getDropSchemaCommand, getDropTableString, getDropUniqueKeyString, getDual, getEnableConstraintsStatement, getEnableConstraintStatement, getEnumTypeDeclaration, getFallbackSchemaManagementTool, getFloatPrecision, getForeignKeyExporter, getForUpdateString, getForUpdateString, getForUpdateString, getFromDualForSelectOnly, getHqlTranslator, getIndexExporter, getInExpressionCountLimit, getKeywords, getLobMergeStrategy, getLockingStrategy, getLockRowIdentifier, getLowercaseFunction, getMaxAliasLength, getMaxNVarcharCapacity, getMaxNVarcharLength, getMaxVarbinaryCapacity, getMultiKeyLoadSizingStrategy, getNativeIdentifierGeneratorStrategy, getNullColumnString, getNullColumnString, getNullOrdering, getParameterCountLimit, getPreferredSqlTypeCodeForArray, getPreferredSqlTypeCodeForBoolean, getQueryHintString, getReadRowLockStrategy, getRowIdColumnString, getSchemaNameResolver, getSelectGUIDString, getSequenceExporter, getSequenceInformationExtractor, getSizeStrategy, getSqmTranslatorFactory, getSupportedTemporaryTableKind, getTableCleaner, getTableComment, getTableMigrator, getTableTypeString, getTemporaryTableAfterUseAction, getTemporaryTableBeforeUseAction, getTemporaryTableCreateCommand, getTemporaryTableCreateOptions, getTemporaryTableDdlTransactionHandling, getTemporaryTableDropCommand, getTemporaryTableExporter, getTemporaryTableTruncateCommand, getTimeoutInSeconds, getTruncateTableStatement, getTruncateTableStatements, getUniqueKeyExporter, getUserDefinedTypeComment, getUserDefinedTypeExporter, getVersion, hasAlterTable, hasDataTypeBeforeGeneratedAs, hasSelfReferentialForeignKeyBug, initDefaultProperties, isEmptyStringTreatedAsNull, isJdbcLogWarningsEnabledByDefault, isLob, openQuote, ordinal, prependComment, quote, registerDefaultKeywords, registerKeyword, registerKeywords, registerResultSetOutParameter, requiresCastForConcatenatingNonStrings, requiresFloatCastingOfIntegerDivision, requiresParensForTupleCounts, resolveSqlTypeCode, resolveSqlTypeLength, stripsTrailingSpacesFromChar, supportsBatchUpdates, supportsBindAsCallableArgument, supportsBindingNullForSetObject, supportsBitType, supportsCascadeDelete, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsExistsInSelect, supportsExpectedLobUsagePattern, supportsFractionalTimestampArithmetic, supportsIfExistsAfterConstraintName, supportsIfExistsAfterTableName, supportsIfExistsAfterTypeName, supportsInsertReturningGeneratedKeys, supportsInsertReturningRowId, supportsLockTimeouts, supportsNamedParameters, supportsNationalizedMethods, supportsNoColumnsInsert, supportsNullPrecedence, supportsOrderByInSubquery, supportsOrdinalSelectItemReference, supportsPredicateAsExpression, supportsRefCursors, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsStandardCurrentTimestampFunction, supportsSubqueryInSelect, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTableOptions, supportsTemporaryTablePrimaryKey, supportsTemporaryTables, supportsTruncateWithCast, supportsTupleDistinctCounts, supportsUnionAll, supportsUnionInSubquery, supportsUpdateReturning, supportsValuesListForInsert, toBooleanValueString, toQuotedIdentifier, toString, transformSelectString, translateDurationField, trimPattern, unquoteGetGeneratedKeys, useArrayForMultiValuedParameters, useCrossReferenceForeignKeys, useFollowOnLocking, useMaterializedLobWhenCapacityExceeded

Methods inherited from class java.lang.Object

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

Field Details

MINIMUM_VERSION

protected static final DatabaseVersion MINIMUM_VERSION

driverKind

protected final PostgreSQLDriverKind driverKind

Constructor Details

PostgreSQLDialect

public PostgreSQLDialect()

PostgreSQLDialect

public PostgreSQLDialect(DialectResolutionInfo info)

PostgreSQLDialect

public PostgreSQLDialect(DatabaseVersion version)

PostgreSQLDialect

public PostgreSQLDialect(DatabaseVersion version,
 PostgreSQLDriverKind driverKind)

Method Details

getMinimumSupportedVersion

protected DatabaseVersion getMinimumSupportedVersion()

Description copied from class: Dialect

Get the version of the SQL dialect that is the minimum supported by this implementation.

Overrides:

getMinimumSupportedVersion in class Dialect

getDefaultNonContextualLobCreation

public boolean getDefaultNonContextualLobCreation()

Description copied from class: Dialect

The default value to use for the configuration property "hibernate.jdbc.lob.non_contextual_creation".

Overrides:

getDefaultNonContextualLobCreation in class Dialect

columnType

protected String columnType(int sqlTypeCode)

Description copied from class: Dialect

The database column type name for a given JDBC type code defined in Types or SqlTypes. This default implementation returns the ANSI-standard type name.

This method may be overridden by concrete Dialects as an alternative to Dialect.registerColumnTypes(TypeContributions, ServiceRegistry) for simple registrations.

Note that:

1. Implementations of this method are expected to define a sensible mapping forTypes.NCLOB Types.NCHAR, and Types.NVARCHAR. On some database, these types are simply remapped to CLOB, CHAR, and VARCHAR.
2. Mappings for Types.TIMESTAMP and Types.TIMESTAMP_WITH_TIMEZONE should support explicit specification of precision if possible.
3. As specified by DdlTypeRegistry.getDescriptor(int), this method never receives Types.LONGVARCHAR, Types.LONGNVARCHAR, nor Types.LONGVARBINARY, which are considered synonyms for their non-LONG counterparts.
4. On the other hand, the types SqlTypes.LONG32VARCHAR, SqlTypes.LONG32NVARCHAR, and SqlTypes.LONG32VARBINARY are not synonyms, and implementations of this method must define sensible mappings, for example to database-native TEXT or CLOB types.

Overrides:

columnType in class Dialect

Parameters:

sqlTypeCode - a SQL type code

Returns:

a column type name, with $l, $p, $s placeholders for length, precision, scale

See Also:

• SqlTypes

castType

protected String castType(int sqlTypeCode)

Description copied from class: Dialect

The SQL type to use in cast( ... as ... ) expressions when casting to the target type represented by the given JDBC type code.

Overrides:

castType in class Dialect

Parameters:

sqlTypeCode - The JDBC type code representing the target type

Returns:

The SQL type to use in cast()

registerColumnTypes

protected void registerColumnTypes(TypeContributions typeContributions,
 ServiceRegistry serviceRegistry)

Description copied from class: Dialect

Register ANSI-standard column types using the length limits defined by Dialect.getMaxVarcharLength(), Dialect.getMaxNVarcharLength(), and Dialect.getMaxVarbinaryLength().

This method is always called when a Dialect is instantiated.

Overrides:

registerColumnTypes in class Dialect

getMaxVarcharLength

public int getMaxVarcharLength()

Description copied from class: Dialect

The biggest size value that can be supplied as argument to a Types.VARCHAR-like type.

For longer column lengths, use some sort of text-like type for the column.

Overrides:

getMaxVarcharLength in class Dialect

getMaxVarcharCapacity

public int getMaxVarcharCapacity()

Description copied from class: Dialect

The longest possible length of a Types.VARCHAR-like column.

For longer column lengths, use some sort of clob-like type for the column.

Overrides:

getMaxVarcharCapacity in class Dialect

getMaxVarbinaryLength

public int getMaxVarbinaryLength()

Description copied from class: Dialect

The biggest size value that can be supplied as argument to a Types.VARBINARY-like type.

For longer column lengths, use some sort of image-like type for the column.

Overrides:

getMaxVarbinaryLength in class Dialect

getDefaultStatementBatchSize

public int getDefaultStatementBatchSize()

Description copied from class: Dialect

The default value to use for the configuration property "hibernate.jdbc.batch_size".

Overrides:

getDefaultStatementBatchSize in class Dialect

resolveSqlTypeDescriptor

public JdbcType resolveSqlTypeDescriptor(String columnTypeName,
 int jdbcTypeCode,
 int precision,
 int scale,
 JdbcTypeRegistry jdbcTypeRegistry)

Description copied from class: Dialect

Assigns an appropriate JdbcType to a column of a JDBC result set based on the column type name, JDBC type code, precision, and scale.

Overrides:

resolveSqlTypeDescriptor in class Dialect

Parameters:

columnTypeName - the column type name

jdbcTypeCode - the type code

precision - the precision or 0

scale - the scale or 0

Returns:

an appropriate instance of JdbcType

resolveSqlTypeCode

protected Integer resolveSqlTypeCode(String columnTypeName,
 TypeConfiguration typeConfiguration)

Description copied from class: Dialect

Resolves the SqlTypes type code for the given column type name as reported by the database, or null if it can't be resolved.

Overrides:

resolveSqlTypeCode in class Dialect

getEnumTypeDeclaration

public String getEnumTypeDeclaration(String name,
 String[] values)

Description copied from class: Dialect

If this database has a special MySQL-style enum column type, return the type declaration for the given enumeration of values.

If the database has no such type, return null.

Overrides:

getEnumTypeDeclaration in class Dialect

values - the enumerated values of the type

Returns:

the DDL column type declaration

getCreateEnumTypeCommand

public String[] getCreateEnumTypeCommand(String name,
 String[] values)

Overrides:

getCreateEnumTypeCommand in class Dialect

getDropEnumTypeCommand

public String[] getDropEnumTypeCommand(String name)

Overrides:

getDropEnumTypeCommand in class Dialect

currentTime

public String currentTime()

Description copied from class: Dialect

Translation of the HQL/JPQL current_time function, which maps to the Java type Time which is a time with no time zone. This contradicts ANSI SQL where current_time has the type TIME WITH TIME ZONE.

It is recommended to override this in dialects for databases which support localtime or time at local.

Overrides:

currentTime in class Dialect

currentTimestamp

public String currentTimestamp()

Description copied from class: Dialect

Translation of the HQL/JPQL current_timestamp function, which maps to the Java type Timestamp which is a datetime with no time zone. This contradicts ANSI SQL where current_timestamp has the type TIMESTAMP WITH TIME ZONE.

It is recommended to override this in dialects for databases which support localtimestamp or timestamp at local.

Overrides:

currentTimestamp in class Dialect

currentTimestampWithTimeZone

public String currentTimestampWithTimeZone()

Description copied from class: Dialect

Translation of the HQL offset_datetime function, which maps to the Java type OffsetDateTime which is a datetime with a time zone. This in principle correctly maps to the ANSI SQL current_timestamp which has the type TIMESTAMP WITH TIME ZONE.

Overrides:

currentTimestampWithTimeZone in class Dialect

extractPattern

public String extractPattern(TemporalUnit unit)

The extract() function returns TemporalUnit.DAY_OF_WEEK numbered from 0 to 6. This isn't consistent with what most other databases do, so here we adjust the result by generating (extract(dow,arg)+1)).

Overrides:

extractPattern in class Dialect

Parameters:

unit - the first argument

castPattern

public String castPattern(CastType from,
 CastType to)

Description copied from class: Dialect

Obtain a pattern for the SQL equivalent to a cast() function call. The resulting pattern must contain ?1 and ?2 placeholders for the arguments.

Overrides:

castPattern in class Dialect

Parameters:

from - a CastType indicating the type of the value argument

to - a CastType indicating the type the value argument is cast to

getFractionalSecondPrecisionInNanos

public long getFractionalSecondPrecisionInNanos()

microsecond is the smallest unit for an interval, and the highest precision for a timestamp, so we could use it as the "native" precision, but it's more convenient to use whole seconds (with the fractional part), since we want to use extract(epoch from ...) in our emulation of timestampdiff().

Overrides:

getFractionalSecondPrecisionInNanos in class Dialect

Returns:

the precision, specified as a quantity of nanoseconds

See Also:

• TemporalUnit.NATIVE

timestampaddPattern

public String timestampaddPattern(TemporalUnit unit,
 TemporalType temporalType,
 IntervalType intervalType)

Description copied from class: Dialect

Obtain a pattern for the SQL equivalent to a timestampadd() function call. The resulting pattern must contain ?1, ?2, and ?3 placeholders for the arguments.

Overrides:

timestampaddPattern in class Dialect

Parameters:

unit - The unit to add to the temporal

temporalType - The type of the temporal

intervalType - The type of interval to add or null if it's not a native interval

timestampdiffPattern

public String timestampdiffPattern(TemporalUnit unit,
 TemporalType fromTemporalType,
 TemporalType toTemporalType)

Description copied from class: Dialect

Obtain a pattern for the SQL equivalent to a timestampdiff() function call. The resulting pattern must contain ?1, ?2, and ?3 placeholders for the arguments.

Overrides:

timestampdiffPattern in class Dialect

Parameters:

unit - the first argument

fromTemporalType - true if the first argument is a timestamp, false if a date

toTemporalType - true if the second argument is

getTimeZoneSupport

public TimeZoneSupport getTimeZoneSupport()

Description copied from class: Dialect

How the dialect supports time zone types like Types.TIMESTAMP_WITH_TIMEZONE.

Overrides:

getTimeZoneSupport in class Dialect

initializeFunctionRegistry

public void initializeFunctionRegistry(FunctionContributions functionContributions)

Description copied from class: Dialect

Initialize the given registry with any dialect-specific functions.

Support for certain SQL functions is required, and if the database does not support a required function, then the dialect must define a way to emulate it.

These required functions include the functions defined by the JPA query language specification:

• avg(arg) - aggregate function
• count([distinct ]arg) - aggregate function
• max(arg) - aggregate function
• min(arg) - aggregate function
• sum(arg) - aggregate function

• coalesce(arg0, arg1, ...)
• nullif(arg0, arg1)

• lower(arg)
• upper(arg)
• length(arg)
• concat(arg0, arg1, ...)
• locate(pattern, string[, start])
• substring(string, start[, length])
• trim([[spec ][character ]from] string)

• abs(arg)
• mod(arg0, arg1)
• sqrt(arg)

• current date
• current time
• current timestamp

Along with an additional set of functions defined by ANSI SQL:

• any(arg) - aggregate function
• every(arg) - aggregate function

• var_samp(arg) - aggregate function
• var_pop(arg) - aggregate function
• stddev_samp(arg) - aggregate function
• stddev_pop(arg) - aggregate function

• cast(arg as Type)
• extract(field from arg)

• ln(arg)
• exp(arg)
• power(arg0, arg1)
• floor(arg)
• ceiling(arg)

• position(pattern in string)
• substring(string from start[ for length])
• overlay(string placing replacement from start[ for length])

And the following functions for working with java.time types:

• local date
• local time
• local datetime
• offset datetime
• instant

And a number of additional "standard" functions:

• left(string, length)
• right(string, length)
• replace(string, pattern, replacement)
• pad(string with length spec[ character])
• repeat(string, times)

• pi
• log10(arg)
• log(base, arg)
• sign(arg)
• sin(arg)
• cos(arg)
• tan(arg)
• asin(arg)
• acos(arg)
• atan(arg)
• atan2(arg0, arg1)
• round(arg0[, arg1])
• truncate(arg0[, arg1])
• sinh(arg)
• tanh(arg)
• cosh(arg)
• least(arg0, arg1, ...)
• greatest(arg0, arg1, ...)
• degrees(arg)
• radians(arg)
• bitand(arg1, arg1)
• bitor(arg1, arg1)
• bitxor(arg1, arg1)

• format(datetime as pattern)
• collate(string as collation)
• str(arg) - synonym of cast(a as String)
• ifnull(arg0, arg1) - synonym of coalesce(a, b)

Finally, the following functions are defined as abbreviations for extract(), and desugared by the parser:

• second(arg) - synonym of extract(second from a)
• minute(arg) - synonym of extract(minute from a)
• hour(arg) - synonym of extract(hour from a)
• day(arg) - synonym of extract(day from a)
• month(arg) - synonym of extract(month from a)
• year(arg) - synonym of extract(year from a)

Note that according to this definition, the second() function returns a floating point value, contrary to the integer type returned by the native function with this name on many databases. Thus, we don't just naively map these HQL functions to the native SQL functions with the same names.

Overrides:

initializeFunctionRegistry in class Dialect

getDefaultOrdinalityColumnName

public @Nullable String getDefaultOrdinalityColumnName()

Description copied from class: Dialect

Returns the default name of the ordinality column for a set-returning function if it supports that, otherwise returns null.

Overrides:

getDefaultOrdinalityColumnName in class Dialect

supportsMinMaxOnUuid

protected boolean supportsMinMaxOnUuid()

Whether PostgreSQL supports min(uuid)/max(uuid), which it doesn't by default. Since the emulation does not perform well, this method may be overridden by any user who ensures that aggregate functions for handling uuids exist in the database.

The following definitions can be used for this purpose:

 create or replace function min(uuid, uuid)
     returns uuid
     immutable parallel safe
     language plpgsql as
 $$
 begin
     return least($1, $2);
 end
 $$;

 create aggregate min(uuid) (
     sfunc = min,
     stype = uuid,
     combinefunc = min,
     parallel = safe,
     sortop = operator (<)
     );

 create or replace function max(uuid, uuid)
     returns uuid
     immutable parallel safe
     language plpgsql as
 $$
 begin
     return greatest($1, $2);
 end
 $$;

 create aggregate max(uuid) (
     sfunc = max,
     stype = uuid,
     combinefunc = max,
     parallel = safe,
     sortop = operator (>)
     );
 

getNameQualifierSupport

public NameQualifierSupport getNameQualifierSupport()

Description copied from class: Dialect

The support for qualified identifiers.

By default, decide based on DatabaseMetaData.

Overrides:

getNameQualifierSupport in class Dialect

Returns:

The NameQualifierSupport, or null to use DatabaseMetaData.

getCurrentSchemaCommand

public String getCurrentSchemaCommand()

Description copied from class: Dialect

Get the SQL command used to retrieve the current schema name.

Works in conjunction with Dialect.getSchemaNameResolver(), unless the resulting SchemaNameResolver does not need this information. For example, a custom implementation might make use of the Java 1.7 Connection.getSchema() method.

Overrides:

getCurrentSchemaCommand in class Dialect

Returns:

The current schema retrieval SQL

supportsDistinctFromPredicate

public boolean supportsDistinctFromPredicate()

Description copied from class: Dialect

Does this dialect support some kind of distinct from predicate?

That is, does it support syntax like:

 ... where FIRST_NAME IS DISTINCT FROM LAST_NAME
 

Overrides:

supportsDistinctFromPredicate in class Dialect

Returns:

True if this SQL dialect is known to support some kind of distinct from predicate; false otherwise

supportsIfExistsBeforeTableName

public boolean supportsIfExistsBeforeTableName()

Description copied from class: Dialect

For dropping a table, can the phrase if exists be applied before the table name?

Overrides:

supportsIfExistsBeforeTableName in class Dialect

Returns:

true if if exists can be applied before the table name

supportsIfExistsBeforeTypeName

public boolean supportsIfExistsBeforeTypeName()

Description copied from class: Dialect

For dropping a type, can the phrase if exists be applied before the type name?

Overrides:

supportsIfExistsBeforeTypeName in class Dialect

Returns:

true if if exists can be applied before the type name

supportsIfExistsBeforeConstraintName

public boolean supportsIfExistsBeforeConstraintName()

Description copied from class: Dialect

For dropping a constraint with an alter table statement, can the phrase if exists be applied before the constraint name?

Overrides:

supportsIfExistsBeforeConstraintName in class Dialect

Returns:

true if if exists can be applied before the constraint name

supportsIfExistsAfterAlterTable

public boolean supportsIfExistsAfterAlterTable()

Description copied from class: Dialect

For an alter table, can the phrase if exists be applied?

Overrides:

supportsIfExistsAfterAlterTable in class Dialect

Returns:

true if if exists can be applied after alter table

getBeforeDropStatement

public String getBeforeDropStatement()

Description copied from class: Dialect

A command to execute before dropping tables.

Overrides:

getBeforeDropStatement in class Dialect

Returns:

A SQL statement, or null

getAlterColumnTypeString

public String getAlterColumnTypeString(String columnName,
 String columnType,
 String columnDefinition)

Description copied from class: Dialect

The fragment of an alter table command which modifies a column type, or null if column types cannot be modified. Often alter column col_name set data type col_type.

Overrides:

getAlterColumnTypeString in class Dialect

Parameters:

columnName - the name of the column

columnType - the new type of the column

columnDefinition - the full column definition

Returns:

a fragment to be appended to alter table

supportsAlterColumnType

public boolean supportsAlterColumnType()

Description copied from class: Dialect

Does this dialect support modifying the type of an existing column?

Overrides:

supportsAlterColumnType in class Dialect

supportsValuesList

public boolean supportsValuesList()

Description copied from class: Dialect

Does this dialect support values lists of form VALUES (1), (2), (3)?

Overrides:

supportsValuesList in class Dialect

Returns:

true if values list are supported

supportsPartitionBy

public boolean supportsPartitionBy()

Description copied from class: Dialect

Does is dialect support partition by?

Overrides:

supportsPartitionBy in class Dialect

supportsNonQueryWithCTE

public boolean supportsNonQueryWithCTE()

Description copied from class: Dialect

Does this dialect support insert, update, and delete statements with Common Table Expressions (CTEs)?

Overrides:

supportsNonQueryWithCTE in class Dialect

Returns:

true if non-query statements are supported with CTE

supportsConflictClauseForInsertCTE

public boolean supportsConflictClauseForInsertCTE()

Description copied from class: Dialect

Does this dialect support the conflict clause for insert statements that appear in a CTE?

Overrides:

supportsConflictClauseForInsertCTE in class Dialect

Returns:

true if conflict clause is supported

getSequenceSupport

public SequenceSupport getSequenceSupport()

Description copied from class: Dialect

Get the appropriate SequenceSupport for this dialect.

Overrides:

getSequenceSupport in class Dialect

getCascadeConstraintsString

public String getCascadeConstraintsString()

Description copied from class: Dialect

The keyword that specifies that a drop table operation should be cascaded to its constraints, typically " cascade" where the leading space is required, or the empty string if there is no such keyword in this dialect.

Overrides:

getCascadeConstraintsString in class Dialect

Returns:

The cascade drop keyword, if any, with a leading space

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.

getLimitHandler

public LimitHandler getLimitHandler()

Description copied from class: Dialect

Obtain a LimitHandler that implements pagination support for Query.setMaxResults(int) and Query.setFirstResult(int).

Overrides:

getLimitHandler in class Dialect

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.

getForUpdateString

public String getForUpdateString(String aliases,
 LockOptions lockOptions)

Description copied from class: Dialect

Get the FOR UPDATE OF or FOR SHARE OF fragment appropriate for this dialect, given the aliases of the columns to be locked.

Overrides:

getForUpdateString in class Dialect

Parameters:

aliases - The columns to be locked.

lockOptions - the lock options to apply

Returns:

The appropriate FOR UPDATE OF column_list clause string.

getNoColumnsInsertString

public String getNoColumnsInsertString()

Description copied from class: Dialect

The fragment used to insert a row without specifying any column values, usually just (), but sometimes default values.

Overrides:

getNoColumnsInsertString in class Dialect

Returns:

The appropriate empty values clause.

getCaseInsensitiveLike

public String getCaseInsensitiveLike()

Description copied from class: Dialect

The name of the SQL operator that performs case-insensitive LIKE comparisons.

Overrides:

getCaseInsensitiveLike in class Dialect

Returns:

The dialect-specific case-insensitive like operator.

supportsCaseInsensitiveLike

public boolean supportsCaseInsensitiveLike()

Description copied from class: Dialect

Does this dialect support case-insensitive LIKE comparisons?

Overrides:

supportsCaseInsensitiveLike in class Dialect

Returns:

true if the database supports case-insensitive like comparisons, false otherwise. The default is false.

getNativeValueGenerationStrategy

public GenerationType getNativeValueGenerationStrategy()

Description copied from class: Dialect

The native type of generation supported by this Dialect.

Overrides:

getNativeValueGenerationStrategy in class Dialect

See Also:

• NativeGenerator

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, that is, using PreparedStatement.setBinaryStream(int, java.io.InputStream, int)).

Overrides:

useInputStreamToInsertBlob in class Dialect

Returns:

True if BLOBs and CLOBs should be bound using stream operations.

useConnectionToCreateLob

public boolean useConnectionToCreateLob()

Description copied from class: Dialect

Should Blob, Clob, and NClob be created solely using Connection.createBlob(), Connection.createClob(), and Connection.createNClob(), instead of allowing the use of our own implementations.

Overrides:

useConnectionToCreateLob in class Dialect

Returns:

True if these types should be instantiated using Connection.

getSelectClauseNullString

public String getSelectClauseNullString(int sqlType,
 TypeConfiguration typeConfiguration)

Description copied from class: Dialect

Given a JDBC type code, return the expression for a literal null value of that type, to use in a select clause.

The select query will be an element of a UNION or UNION ALL.

Overrides:

getSelectClauseNullString in class Dialect

Parameters:

sqlType - The Types type code.

typeConfiguration - The type configuration

Returns:

The appropriate select clause value fragment.

quoteCollation

public String quoteCollation(String collation)

Description copied from class: Dialect

Quote the given collation name if necessary.

Overrides:

quoteCollation in class Dialect

supportsCommentOn

public boolean supportsCommentOn()

Description copied from class: Dialect

Does this dialect support commenting on tables and columns?

Overrides:

supportsCommentOn in class Dialect

Returns:

true if commenting is supported

supportsCurrentTimestampSelection

public boolean supportsCurrentTimestampSelection()

Description copied from class: Dialect

Does this dialect support some way to retrieve the current timestamp value from the database?

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

Is the command returned by Dialect.getCurrentTimestampSelectString() treated as callable?

Typically, this indicates the use of the JDBC escape syntax.

Overrides:

isCurrentTimestampSelectStringCallable in class Dialect

Returns:

if the Dialect.getCurrentTimestampSelectString() is treated as callable; false otherwise.

getCurrentTimestampSelectString

public String getCurrentTimestampSelectString()

Description copied from class: Dialect

The command used to retrieve the current timestamp from the database.

Overrides:

getCurrentTimestampSelectString in class Dialect

supportsTupleCounts

public boolean supportsTupleCounts()

Description copied from class: Dialect

Does this dialect support count(a,b)?

Overrides:

supportsTupleCounts in class Dialect

Returns:

True if the database supports counting tuples; false otherwise.

supportsIsTrue

public boolean supportsIsTrue()

Description copied from class: Dialect

Does this dialect support the is true and is false operators?

Overrides:

supportsIsTrue in class Dialect

Returns:

true if the database supports is true and is false, or false if it does not. The default is is false.

requiresParensForTupleDistinctCounts

public boolean requiresParensForTupleDistinctCounts()

Description copied from class: Dialect

If Dialect.supportsTupleDistinctCounts() is true, does this dialect require the tuple to be delimited with parentheses?

Overrides:

requiresParensForTupleDistinctCounts in class Dialect

Returns:

boolean

appendBooleanValueString

public void appendBooleanValueString(SqlAppender appender,
 boolean bool)

Description copied from class: Dialect

Append the SQL literal expression representing the given boolean value to the given SqlAppender.

Overrides:

appendBooleanValueString in class Dialect

Parameters:

appender - The SqlAppender to append the literal expression to

bool - The boolean value

buildIdentifierHelper

public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder,
 DatabaseMetaData dbMetaData)
                                       throws SQLException

Description copied from class: Dialect

The IdentifierHelper indicated by this dialect for handling identifier conversions. Returning null is allowed and indicates that Hibernate should fall back to building a "standard" helper. In the fallback path, any changes made to the IdentifierHelperBuilder during this call will still be incorporated into the built IdentifierHelper.

The incoming builder will have the following set:

• IdentifierHelperBuilder.isGloballyQuoteIdentifiers()
• IdentifierHelperBuilder.getUnquotedCaseStrategy() - initialized to UPPER
• IdentifierHelperBuilder.getQuotedCaseStrategy() - initialized to MIXED

By default, Hibernate will do the following:

• Call IdentifierHelperBuilder.applyIdentifierCasing(DatabaseMetaData)
• Call IdentifierHelperBuilder.applyReservedWords(DatabaseMetaData)
• Applies AnsiSqlKeywords.sql2003() as reserved words
• Applies the {#link #sqlKeywords} collected here as reserved words
• Applies the Dialect's NameQualifierSupport, if it defines one

Overrides:

buildIdentifierHelper in class Dialect

Parameters:

builder - A partially-configured IdentifierHelperBuilder.

dbMetaData - Access to the metadata returned from the driver if needed and if available. WARNING: it may be null.

Returns:

The IdentifierHelper instance to use, or null to indicate Hibernate should use its fallback path

Throws:

SQLException - Accessing the DatabaseMetaData can throw it. Just rethrow and Hibernate will handle it.

See Also:

• Dialect.getNameQualifierSupport()

getFallbackSqmMutationStrategy

public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(EntityMappingType rootEntityDescriptor,
 RuntimeModelCreationContext runtimeModelCreationContext)

Description copied from class: Dialect

The SqmMultiTableMutationStrategy to use when not specified by QueryEngineOptions.getCustomSqmMultiTableMutationStrategy().

Overrides:

getFallbackSqmMutationStrategy in class Dialect

See Also:

• SqmMultiTableMutationStrategyProvider.createMutationStrategy(org.hibernate.metamodel.mapping.EntityMappingType, org.hibernate.metamodel.mapping.internal.MappingModelCreationProcess)

getFallbackSqmInsertStrategy

public SqmMultiTableInsertStrategy getFallbackSqmInsertStrategy(EntityMappingType rootEntityDescriptor,
 RuntimeModelCreationContext runtimeModelCreationContext)

Description copied from class: Dialect

The SqmMultiTableInsertStrategy to use when not specified by QueryEngineOptions.getCustomSqmMultiTableInsertStrategy().

Overrides:

getFallbackSqmInsertStrategy in class Dialect

See Also:

• SqmMultiTableMutationStrategyProvider.createInsertStrategy(org.hibernate.metamodel.mapping.EntityMappingType, org.hibernate.metamodel.mapping.internal.MappingModelCreationProcess)

getSqlAstTranslatorFactory

public SqlAstTranslatorFactory getSqlAstTranslatorFactory()

Description copied from class: Dialect

Return a SqlAstTranslatorFactory specific to this dialect, or null to use the standard translator.

Overrides:

getSqlAstTranslatorFactory in class Dialect

See Also:

• StandardSqlAstTranslatorFactory
• JdbcEnvironment.getSqlAstTranslatorFactory()

getViolatedConstraintNameExtractor

public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor()

Description copied from class: Dialect

A ViolatedConstraintNameExtractor for extracting the name of a violated constraint from a SQLException.

Specified by:

getViolatedConstraintNameExtractor in interface ConversionContext

Overrides:

getViolatedConstraintNameExtractor in class Dialect

buildSQLExceptionConversionDelegate

public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate()

Description copied from class: Dialect

An instance of SQLExceptionConversionDelegate for interpreting dialect-specific error or SQLState codes.

If this method is overridden to return a non-null value, the default SQLExceptionConverter will use the returned SQLExceptionConversionDelegate in addition to the following standard delegates:

1. a "static" delegate based on the JDBC4-defined SQLException hierarchy, and
2. a delegate that interprets SQLState codes as either X/Open or SQL-2003 codes, depending on what is reported by the JDBC driver.

It is strongly recommended that every Dialect implementation override this method, since interpretation of a SQL error is much more accurate when based on the vendor-specific error code, rather than on the SQLState.

Overrides:

buildSQLExceptionConversionDelegate in class Dialect

Returns:

The SQLExceptionConversionDelegate for this dialect

registerResultSetOutParameter

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

Description copied from class: Dialect

Registers a parameter capable of returning a ResultSet by position, either an OUT parameter, or a REF_CURSOR parameter as defined in Java 8.

Overrides:

registerResultSetOutParameter in class Dialect

Parameters:

statement - The callable statement.

col - The bind position at which to register the output param.

Returns:

The number of (contiguous) bind positions used.

Throws:

SQLException - Indicates problems registering the 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.

supportsLobValueChangePropagation

public boolean supportsLobValueChangePropagation()

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).

Overrides:

supportsLobValueChangePropagation 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?

Overrides:

supportsUnboundedLobLocatorMaterialization in class Dialect

Returns:

True if unbounded materialization is supported; false otherwise.

getGroupBySelectItemReferenceStrategy

public SelectItemReferenceStrategy getGroupBySelectItemReferenceStrategy()

Description copied from class: Dialect

Determine how selected items are referenced in the group by clause.

Overrides:

getGroupBySelectItemReferenceStrategy in class Dialect

getCallableStatementSupport

public CallableStatementSupport getCallableStatementSupport()

Description copied from class: Dialect

The CallableStatementSupport for this database. Does this database support returning cursors?

Overrides:

getCallableStatementSupport in class Dialect

getResultSet

public ResultSet getResultSet(CallableStatement statement,
 int position)
                       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 positional OUT parameter.

Overrides:

getResultSet in class Dialect

Parameters:

statement - The callable statement.

position - The bind position at which to register the output param.

Returns:

The extracted result set.

Throws:

SQLException - Indicates problems extracting the result set.

getResultSet

public ResultSet getResultSet(CallableStatement statement,
 String name)
                       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 named OUT parameter.

Overrides:

getResultSet in class Dialect

Parameters:

statement - The callable statement.

name - The parameter name (for drivers which support named parameters).

Returns:

The extracted result set.

Throws:

SQLException - Indicates problems extracting the result set.

qualifyIndexName

public boolean qualifyIndexName()

Description copied from class: Dialect

Do we need to qualify index names with the schema name?

Overrides:

qualifyIndexName in class Dialect

Returns:

true if we do

getIdentityColumnSupport

public IdentityColumnSupport getIdentityColumnSupport()

Description copied from class: Dialect

Get the appropriate IdentityColumnSupport for this dialect.

Overrides:

getIdentityColumnSupport in class Dialect

Returns:

the IdentityColumnSupport

getNationalizationSupport

public NationalizationSupport getNationalizationSupport()

Description copied from class: Dialect

Determines whether this database requires the use of explicitly nationalized character (Unicode) data types.

That is, whether the use of Types.NCHAR, Types.NVARCHAR, and Types.NCLOB is required for nationalized character data.

Overrides:

getNationalizationSupport in class Dialect

getMaxIdentifierLength

public int getMaxIdentifierLength()

Description copied from class: Dialect

What is the maximum identifier length supported by this dialect?

Overrides:

getMaxIdentifierLength in class Dialect

Returns:

The maximum length.

supportsStandardArrays

public boolean supportsStandardArrays()

Description copied from class: Dialect

Does this database have native support for ANSI SQL standard arrays which are expressed in terms of the element type name: integer array.

Overrides:

supportsStandardArrays in class Dialect

Returns:

boolean

supportsJdbcConnectionLobCreation

public boolean supportsJdbcConnectionLobCreation(DatabaseMetaData databaseMetaData)

Description copied from class: Dialect

Check whether the JDBC Connection supports creating LOBs via Connection.createBlob(), Connection.createNClob(), or Connection.createClob().

Overrides:

supportsJdbcConnectionLobCreation in class Dialect

Parameters:

databaseMetaData - JDBC DatabaseMetaData which can be used if LOB creation is supported only starting from a given driver version

Returns:

true if LOBs can be created via the JDBC Connection.

supportsMaterializedLobAccess

public boolean supportsMaterializedLobAccess()

Description copied from class: Dialect

Check whether the JDBC driver allows setting LOBs via PreparedStatement.setBytes(int, byte[]), PreparedStatement.setNString(int, String), or PreparedStatement.setString(int, String) APIs.

Overrides:

supportsMaterializedLobAccess in class Dialect

Returns:

true if LOBs can be set with the materialized APIs.

supportsTemporalLiteralOffset

public boolean supportsTemporalLiteralOffset()

Description copied from class: Dialect

Does this dialect supports timezone offsets in temporal literals.

Overrides:

supportsTemporalLiteralOffset in class Dialect

appendDatetimeFormat

public void appendDatetimeFormat(SqlAppender appender,
 String format)

Description copied from class: Dialect

Translate the given datetime format string from the pattern language defined by Java's DateTimeFormatter to whatever pattern language is understood by the native datetime formatting function for this database (often the to_char() function).

Since it's never possible to translate every pattern letter sequences understood by DateTimeFormatter, only the following subset of pattern letters is accepted by Hibernate:

• G: era
• y: year of era
• Y: year of week-based year
• M: month of year
• w: week of week-based year (ISO week number)
• W: week of month
• E: day of week (name)
• e: day of week (number)
• d: day of month
• D: day of year
• a: AM/PM
• H: hour of day (24 hour time)
• h: hour of AM/PM (12 hour time)
• m: minutes
• s: seconds
• z,Z,x: timezone offset

In addition, punctuation characters and single-quoted literal strings are accepted.

Appends a pattern accepted by the function that formats dates and times in this dialect to a SQL fragment that is being constructed.

Overrides:

appendDatetimeFormat in class Dialect

datetimeFormat

public Replacer datetimeFormat(String format)

translateExtractField

public String translateExtractField(TemporalUnit unit)

Description copied from class: Dialect

Return the name used to identify the given field as an argument to the extract() function, or of this dialect's equivalent function.

This method does not need to handle TemporalUnit.NANOSECOND, TemporalUnit.NATIVE, TemporalUnit.OFFSET, TemporalUnit.DATE, TemporalUnit.TIME, TemporalUnit.WEEK_OF_YEAR, nor TemporalUnit.WEEK_OF_MONTH, which are already desugared by ExtractFunction.

Overrides:

translateExtractField in class Dialect

getAggregateSupport

public AggregateSupport getAggregateSupport()

Description copied from class: Dialect

How does this dialect support aggregate types like SqlTypes.STRUCT.

Overrides:

getAggregateSupport in class Dialect

appendBinaryLiteral

public void appendBinaryLiteral(SqlAppender appender,
 byte[] bytes)

Description copied from class: Dialect

Append a binary literal to the given SqlAppender.

Overrides:

appendBinaryLiteral in class Dialect

appendDateTimeLiteral

public void appendDateTimeLiteral(SqlAppender appender,
 TemporalAccessor temporalAccessor,
 TemporalType precision,
 TimeZone jdbcTimeZone)

Description copied from class: Dialect

Append a datetime literal representing the given java.time value to the given SqlAppender.

Overrides:

appendDateTimeLiteral in class Dialect

appendDateTimeLiteral

public void appendDateTimeLiteral(SqlAppender appender,
 Date date,
 TemporalType precision,
 TimeZone jdbcTimeZone)

Description copied from class: Dialect

Append a datetime literal representing the given Date value to the given SqlAppender.

Overrides:

appendDateTimeLiteral in class Dialect

appendDateTimeLiteral

public void appendDateTimeLiteral(SqlAppender appender,
 Calendar calendar,
 TemporalType precision,
 TimeZone jdbcTimeZone)

Description copied from class: Dialect

Append a datetime literal representing the given Calendar value to the given SqlAppender.

Overrides:

appendDateTimeLiteral in class Dialect

getWriteLockString

public String getWriteLockString(int timeout)

Description copied from class: Dialect

Get the string to append to SELECT statements to acquire pessimistic WRITE locks for this dialect.

Location of the returned string is treated the same as Dialect.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.

getWriteLockString

public String getWriteLockString(String aliases,
 int timeout)

Description copied from class: Dialect

Get the string to append to SELECT statements to acquire WRITE locks for this dialect, given the aliases of the columns to be write locked.

Location of the returned string is treated the same as Dialect.getForUpdateString().

Overrides:

getWriteLockString in class Dialect

Parameters:

aliases - The columns to be read locked.

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 READ locks for this dialect.

Location of the returned string is treated the same as Dialect.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.

getReadLockString

public String getReadLockString(String aliases,
 int timeout)

Description copied from class: Dialect

Get the string to append to SELECT statements to acquire READ locks for this dialect, given the aliases of the columns to be read locked.

Location of the returned string is treated the same as Dialect.getForUpdateString().

Overrides:

getReadLockString in class Dialect

Parameters:

aliases - The columns to be read locked.

timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.

Returns:

The appropriate LOCK clause string.

getForUpdateNowaitString

public String getForUpdateNowaitString()

Description copied from class: Dialect

Retrieves the FOR UPDATE NOWAIT syntax specific to this dialect.

Overrides:

getForUpdateNowaitString in class Dialect

Returns:

The appropriate FOR UPDATE NOWAIT clause string.

getForUpdateNowaitString

public String getForUpdateNowaitString(String aliases)

Description copied from class: Dialect

Get the FOR UPDATE OF column_list NOWAIT fragment appropriate for this dialect, given the aliases of the columns to be write locked.

Overrides:

getForUpdateNowaitString in class Dialect

Parameters:

aliases - The columns to be write locked.

Returns:

The appropriate FOR UPDATE OF colunm_list NOWAIT clause string.

getForUpdateSkipLockedString

public String getForUpdateSkipLockedString()

Description copied from class: Dialect

Retrieves the FOR UPDATE SKIP LOCKED syntax specific to this dialect.

Overrides:

getForUpdateSkipLockedString in class Dialect

Returns:

The appropriate FOR UPDATE SKIP LOCKED clause string.

getForUpdateSkipLockedString

public String getForUpdateSkipLockedString(String aliases)

Description copied from class: Dialect

Get the FOR UPDATE OF column_list SKIP LOCKED fragment appropriate for this dialect, given the aliases of the columns to be write locked.

Overrides:

getForUpdateSkipLockedString in class Dialect

Parameters:

aliases - The columns to be write locked.

Returns:

The appropriate FOR UPDATE colunm_list SKIP LOCKED clause string.

supportsNoWait

public boolean supportsNoWait()

Description copied from class: Dialect

Does this dialect support NO_WAIT timeout.

Overrides:

supportsNoWait in class Dialect

Returns:

true if NO_WAIT is supported

supportsWait

public boolean supportsWait()

Description copied from class: Dialect

Does this dialect support WAIT timeout.

Overrides:

supportsWait in class Dialect

Returns:

true if WAIT is supported

supportsSkipLocked

public boolean supportsSkipLocked()

Description copied from class: Dialect

Does this dialect support SKIP_LOCKED timeout.

Overrides:

supportsSkipLocked in class Dialect

Returns:

true if SKIP_LOCKED is supported

supportsInsertReturning

public boolean supportsInsertReturning()

Description copied from class: Dialect

Does this dialect fully support returning arbitrary generated column values after execution of an insert statement, using native SQL syntax?

Support for identity columns is insufficient here, we require something like:

1. insert ... returning ..., or
2. select from final table (insert ... ).

Overrides:

supportsInsertReturning in class Dialect

Returns:

true if InsertReturningDelegate works for any sort of primary key column (not just identity columns), or false if InsertReturningDelegate does not work, or only works for specialized identity/"autoincrement" columns

See Also:

• InsertReturningDelegate

supportsOffsetInSubquery

public boolean supportsOffsetInSubquery()

Description copied from class: Dialect

Does this dialect support offset in subqueries?

For example:

 select * from Table1 where col1 in (select col1 from Table2 order by col2 limit 1 offset 1)
 

Overrides:

supportsOffsetInSubquery in class Dialect

Returns:

true if it does

supportsWindowFunctions

public boolean supportsWindowFunctions()

Description copied from class: Dialect

Does this dialect support window functions like row_number() over (..)?

Overrides:

supportsWindowFunctions in class Dialect

Returns:

true if the underlying database supports window functions, false otherwise. The default is false.

supportsLateral

public boolean supportsLateral()

Description copied from class: Dialect

Does this dialect support the SQL lateral keyword or a proprietary alternative?

Overrides:

supportsLateral in class Dialect

Returns:

true if the underlying database supports lateral, false otherwise. The default is false.

supportsRecursiveCTE

public boolean supportsRecursiveCTE()

Description copied from class: Dialect

Does this dialect/database support recursive CTEs?

Overrides:

supportsRecursiveCTE in class Dialect

Returns:

true if recursive CTEs are supported

supportsFetchClause

public boolean supportsFetchClause(FetchClauseType type)

Description copied from class: Dialect

Does this dialect support the given FETCH clause type.

Overrides:

supportsFetchClause in class Dialect

Parameters:

type - The fetch clause type

Returns:

true if the underlying database supports the given fetch clause type, false otherwise. The default is false.

getFunctionalDependencyAnalysisSupport

public FunctionalDependencyAnalysisSupport getFunctionalDependencyAnalysisSupport()

Description copied from class: Dialect

Get this dialect's level of support for primary key functional dependency analysis within GROUP BY and ORDER BY clauses.

Overrides:

getFunctionalDependencyAnalysisSupport in class Dialect

getWriteRowLockStrategy

public RowLockStrategy getWriteRowLockStrategy()

Description copied from class: Dialect

The row lock strategy to use for write locks.

Overrides:

getWriteRowLockStrategy in class Dialect

augmentRecognizedTableTypes

public void augmentRecognizedTableTypes(List<String> tableTypesList)

Overrides:

augmentRecognizedTableTypes in class Dialect

contributeTypes

public void contributeTypes(TypeContributions typeContributions,
 ServiceRegistry serviceRegistry)

Description copied from class: Dialect

A callback which allows the Dialect to contribute types.

Overrides:

contributeTypes in class Dialect

Parameters:

typeContributions - Callback to contribute the types

serviceRegistry - The service registry

contributePostgreSQLTypes

protected void contributePostgreSQLTypes(TypeContributions typeContributions,
 ServiceRegistry serviceRegistry)

Allow for extension points to override this only

getUniqueDelegate

public UniqueDelegate getUniqueDelegate()

Description copied from class: Dialect

Get the UniqueDelegate supported by this dialect

Overrides:

getUniqueDelegate in class Dialect

Returns:

The UniqueDelegate

getTableExporter

public Exporter<Table> getTableExporter()

Description copied from class: Dialect

Get an Exporter for Tables, usually StandardTableExporter.

Overrides:

getTableExporter in class Dialect

canBatchTruncate

public boolean canBatchTruncate()

Description copied from class: Dialect

Does the truncate table statement accept multiple tables?

Overrides:

canBatchTruncate in class Dialect

Returns:

true, but only because we can "batch" truncate

rowId

public String rowId(String rowId)

Description copied from class: Dialect

The name of a rowid-like pseudo-column which acts as a high-performance row locator, or null if this dialect has no such pseudo-column.

If the rowid-like value is an explicitly-declared named column instead of an implicit pseudo-column, and if the given name is nonempty, return the given name.

Overrides:

rowId in class Dialect

Parameters:

rowId - the name specified by RowId.value(), which is ignored if Dialect.getRowIdColumnString(java.lang.String) is not overridden

rowIdSqlType

public int rowIdSqlType()

Description copied from class: Dialect

The JDBC type code of the rowid-like pseudo-column which acts as a high-performance row locator.

Overrides:

rowIdSqlType in class Dialect

Returns:

Types.ROWID by default

getQueryHintString

public String getQueryHintString(String sql,
 String hints)

Description copied from class: Dialect

Apply a hint to the given SQL query.

The entire query is provided, allowing full control over the placement and syntax of the hint.

By default, ignore the hint and simply return the query.

Overrides:

getQueryHintString in class Dialect

Parameters:

sql - The query to which to apply the hint.

hints - The hints to apply

Returns:

The modified SQL

addSqlHintOrComment

public String addSqlHintOrComment(String sql,
 QueryOptions queryOptions,
 boolean commentsEnabled)

Description copied from class: Dialect

Modify the SQL, adding hints or comments, if necessary.

Overrides:

addSqlHintOrComment in class Dialect

See Also:

• Dialect.getQueryHintString(String,List)
• Dialect.prependComment(java.lang.String, java.lang.String)

createOptionalTableUpdateOperation

public MutationOperation createOptionalTableUpdateOperation(EntityMutationTarget mutationTarget,
 OptionalTableUpdate optionalTableUpdate,
 SessionFactoryImplementor factory)

Description copied from class: Dialect

Create a MutationOperation for a updating an optional table

Overrides:

createOptionalTableUpdateOperation in class Dialect

getNativeParameterMarkerStrategy

public ParameterMarkerStrategy getNativeParameterMarkerStrategy()

Description copied from class: Dialect

Support for native parameter markers.

This is generally dependent on both the database and the driver.

Overrides:

getNativeParameterMarkerStrategy in class Dialect

Returns:

May return null to indicate that the JDBC standard strategy should be used

getDefaultIntervalSecondScale

public int getDefaultIntervalSecondScale()

Description copied from class: Dialect

This is the default scale for a generated column of type INTERVAL SECOND mapped to a Duration.

Usually 9 (nanoseconds) or 6 (microseconds).

Overrides:

getDefaultIntervalSecondScale in class Dialect

Returns:

the default scale, in decimal digits, of the fractional seconds field

See Also:

• DurationJavaType

getDmlTargetColumnQualifierSupport

public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport()

Description copied from class: Dialect

Get the minimum DmlTargetColumnQualifierSupport required by this dialect.

Overrides:

getDmlTargetColumnQualifierSupport in class Dialect

Returns:

the column qualifier support required by this dialect

supportsFromClauseInUpdate

public boolean supportsFromClauseInUpdate()

Description copied from class: Dialect

Does this dialect support the from clause for update statements?

Overrides:

supportsFromClauseInUpdate in class Dialect

Returns:

true if from clause is supported

supportsBindingNullSqlTypeForSetNull

public boolean supportsBindingNullSqlTypeForSetNull()

Description copied from class: Dialect

Does this dialect support binding Types.NULL for PreparedStatement.setNull(int, int)? if it does, then call of PreparedStatement.getParameterMetaData() could be eliminated for better performance.

Overrides:

supportsBindingNullSqlTypeForSetNull in class Dialect

Returns:

true indicates it does; false indicates it does not;

See Also:

• ObjectNullResolvingJdbcType