PostgreSQLDialect (hibernate-core JavaDocs)

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

All Implemented Interfaces:

ConversionContext

Direct Known Subclasses:

PostgresPlusDialect, PostgreSQL81Dialect, PostgreSQL82Dialect, PostgreSQL91Dialect, PostgreSQL92Dialect, PostgreSQL93Dialect, PostgreSQL94Dialect, PostgreSQL95Dialect, PostgreSQL9Dialect
```
public class PostgreSQLDialect
extends Dialect
```
An SQL dialect for Postgres 8 and above.

Nested Class Summary
- Nested classes/interfaces inherited from class org.hibernate.dialect.Dialect
  Dialect.SizeStrategy, Dialect.SizeStrategyImpl

Field Summary
- Fields inherited from class org.hibernate.dialect.Dialect
  CLOSED_QUOTE, DEFAULT_BATCH_SIZE, LEGACY_LOB_MERGE_STRATEGY, NEW_LOCATOR_LOB_MERGE_STRATEGY, NO_BATCH, QUOTE, STANDARD_DEFAULT_BATCH_LOAD_SIZING_STRATEGY, STREAM_XFER_LOB_MERGE_STRATEGY, TWO_SINGLE_QUOTES_REPLACEMENT

Constructor Summary

Constructors
Constructor and Description

PostgreSQLDialect()

PostgreSQLDialect(DialectResolutionInfo info)

PostgreSQLDialect(int version)

Constructors
Constructor and Description
`PostgreSQLDialect()`
`PostgreSQLDialect(DialectResolutionInfo info)`
`PostgreSQLDialect(int version)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`augmentRecognizedTableTypes(List<String> tableTypesList)`
`IdentifierHelper`	`buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData)` Build the IdentifierHelper indicated by this Dialect for handling identifier conversions.
`SQLExceptionConversionDelegate`	`buildSQLExceptionConversionDelegate()` Build an instance of a `SQLExceptionConversionDelegate` for interpreting dialect-specific error or SQLState codes.
`void`	`contributeTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)` Allows the Dialect to contribute additional types
`String`	`currentTime()` Translation of the HQL/JPQL `current_time` function, which maps to the Java type `java.sql.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 `java.sql.Timestamp` which is a datetime with no time zone.
`String`	`currentTimestampWithTimeZone()` Translation of the HQL `offset_datetime` function, which maps to the Java type `java.time.OffsetDateTime` which is a datetime with a time zone.
`Replacer`	`datetimeFormat(String format)`
`protected void`	`extractField(StringBuilder pattern, TemporalUnit unit, TemporalType fromTimestamp, TemporalType toTimestamp, TemporalUnit toUnit)`
`String`	`extractPattern(TemporalUnit unit)` The `extract()` function returns `TemporalUnit.DAY_OF_WEEK` numbered from 0 to 6.
`String`	`formatBinaryLiteral(byte[] bytes)`
`CallableStatementSupport`	`getCallableStatementSupport()`
`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 function that can do case insensitive like comparison.
`String`	`getCurrentTimestampSelectString()` Retrieve the command used to retrieve the current timestamp from the database.
`SqmMultiTableMutationStrategy`	`getFallbackSqmMutationStrategy(EntityMappingType rootEntityDescriptor, RuntimeModelCreationContext runtimeModelCreationContext)`
`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 column_list` fragment appropriate for this dialect given the aliases of the columns to be write 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()`.
`GroupByConstantRenderingStrategy`	`getGroupByConstantRenderingStrategy()` The strategy to use for rendering constants in the GROUP BY clause.
`GroupBySummarizationRenderingStrategy`	`getGroupBySummarizationRenderingStrategy()` The strategy to use for rendering summarizations in the GROUP BY clause.
`IdentityColumnSupport`	`getIdentityColumnSupport()` Get the appropriate `IdentityColumnSupport`
`LimitHandler`	`getLimitHandler()` Returns a `LimitHandler` that implements support for `Query.setMaxResults(int)` and `Query.setFirstResult(int)` for this dialect.
`NationalizationSupport`	`getNationalizationSupport()`
`String`	`getNativeIdentifierGeneratorStrategy()` Resolves the native generation strategy associated to this dialect.
`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 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`.
`ResultSet`	`getResultSet(CallableStatement statement, String name)` 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 Given a `Types` type code, determine an appropriate null value to use in a select clause.
`SequenceSupport`	`getSequenceSupport()`
`SqlAstTranslatorFactory`	`getSqlAstTranslatorFactory()` Return an SqlAstTranslatorFactory specific for the Dialect.
`JdbcTypeDescriptor`	`getSqlTypeDescriptorOverride(int sqlCode)` Returns the `JdbcTypeDescriptor` that should be used to handle the given JDBC type code.
`int`	`getVersion()`
`ViolatedConstraintNameExtractor`	`getViolatedConstraintNameExtractor()`
`String`	`getWriteLockString(int timeout)` Get the string to append to SELECT statements to acquire 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(QueryEngine queryEngine)` Initialize the given registry with any dialect-specific functions.
`boolean`	`isCurrentTimestampSelectStringCallable()` Should the value returned by `Dialect.getCurrentTimestampSelectString()` be treated as callable.
`boolean`	`qualifyIndexName()` Do we need to qualify index names with the schema name?
`int`	`registerResultSetOutParameter(CallableStatement statement, int col)` Registers a parameter (either OUT, or the new REF_CURSOR param type available in Java 8) capable of returning `ResultSet` by position.
`boolean`	`requiresParensForTupleDistinctCounts()` If `Dialect.supportsTupleDistinctCounts()` is true, does the Dialect require the tuple to be wrapped with parens?
`boolean`	`supportsCaseInsensitiveLike()` Does this dialect support case insensitive LIKE restrictions?
`boolean`	`supportsCommentOn()` Does this dialect/database support commenting on tables, columns, etc?
`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`	`supportsFetchClause(FetchClauseType type)` Does this dialect support the given fetch clause type.
`boolean`	`supportsIfExistsAfterAlterTable()` For an "alter table", can the phrase "if exists" be applied?
`boolean`	`supportsIfExistsBeforeConstraintName()` For dropping a constraint with an "alter table", can the phrase "if exists" be applied before the constraint name? NOTE : Only one or the other (or neither) of this and `Dialect.supportsIfExistsAfterConstraintName()` should return true
`boolean`	`supportsIfExistsBeforeTableName()` For dropping a table, can the phrase "if exists" be applied before the table name? NOTE : Only one or the other (or neither) of this and `Dialect.supportsIfExistsAfterTableName()` should return true
`boolean`	`supportsJdbcConnectionLobCreation(DatabaseMetaData databaseMetaData)` Check whether the JDBC `Connection` supports creating LOBs via `Connection.createBlob()`, `Connection.createNClob()` or `Connection.createClob()`.
`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`	`supportsNonQueryWithCTE()` Does this dialect/database support non-query statements (e.g.
`boolean`	`supportsNoWait()` Does this dialect/database support NO_WAIT timeout.
`boolean`	`supportsOffsetInSubquery()` Does this dialect support offset in subqueries? Ex: select * from Table1 where col1 in (select col1 from Table2 order by col2 limit 1 offset 1)
`boolean`	`supportsOuterJoinForUpdate()` Does this dialect support `FOR UPDATE` in conjunction with outer joined rows?
`boolean`	`supportsPartitionBy()` Does the underlying database support partition by
`boolean`	`supportsRowValueConstructorSyntax()` Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax; sometimes called tuple syntax.
`boolean`	`supportsRowValueConstructorSyntaxInInList()` If the dialect supports `row values`, does it offer such support in IN lists as well? For example, "...
`boolean`	`supportsRowValueConstructorSyntaxInQuantifiedPredicates()` Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax; sometimes called tuple syntax with quantified predicates.
`boolean`	`supportsSelectAliasInGroupByClause()`
`boolean`	`supportsSkipLocked()` Does this dialect/database support SKIP_LOCKED timeout.
`boolean`	`supportsTimezoneTypes()` Whether the Dialect supports timezone types like `Types.TIMESTAMP_WITH_TIMEZONE`.
`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`	`supportsValuesList()` Does this dialect/database support VALUES list (e.g.
`boolean`	`supportsWait()` Does this dialect/database support WAIT timeout.
`boolean`	`supportsWindowFunctions()` Does this dialect support window functions like `row_number() over (..)`
`String`	`timestampaddPattern(TemporalUnit unit, TemporalType temporalType)` 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`	`toBooleanValueString(boolean bool)` The SQL literal value to which this database maps boolean values.
`String`	`translateDatetimeFormat(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).
`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`	`useInputStreamToInsertBlob()` Should LOBs (both BLOB and CLOB) be bound using stream operations (i.e.
`protected String`	`wrapDateLiteral(String date)`
`protected String`	`wrapTimeLiteral(String time)`
`protected String`	`wrapTimestampLiteral(String timestamp)`

Methods inherited from class org.hibernate.dialect.Dialect
addSqlHintOrComment, appendLockHint, appendLockHint, applyLocksToSql, areStringComparisonsCaseInsensitive, binaryToDecimalPrecision, bindLimitParametersFirst, bindLimitParametersInReverseOrder, buildSQLExceptionConverter, canCreateCatalog, canCreateSchema, castPattern, closeQuote, convertToFirstRowValue, createCaseFragment, createOuterJoinFragment, currentDate, currentLocalTime, currentLocalTimestamp, defaultScrollMode, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, dropConstraints, equivalentTypes, escapeComment, escapeLiteral, forceLimitUsage, forceLobAsLastValue, formatAsTimestamp, formatAsTimestamp, formatAsTimestamp, formatDateTimeLiteral, formatDateTimeLiteral, formatDateTimeLiteral, forUpdateOfColumns, getAddColumnString, getAddColumnSuffixString, getAddForeignKeyConstraintString, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getAddUniqueConstraintString, getAlterTableString, getAuxiliaryDatabaseObjectExporter, getBooleanCheckCondition, getCastTypeName, getColumnAliasExtractor, getColumnComment, getCreateCatalogCommand, getCreateMultisetTableString, getCreateSchemaCommand, getCreateSequenceString, getCreateSequenceString, getCreateSequenceStrings, getCreateTableString, getCreateTemporaryTableColumnAnnotation, getCrossJoinSeparator, getCurrentSchemaCommand, getCurrentTimestampSQLFunctionName, getDefaultBatchLoadSizingStrategy, getDefaultDecimalPrecision, getDefaultLobLength, getDefaultProperties, getDefaultTimestampPrecision, getDialect, getDialect, getDoublePrecision, getDropCatalogCommand, getDropForeignKeyString, getDropSchemaCommand, getDropSequenceString, getDropSequenceStrings, getDropTableString, getEnumCheckCondition, getFloatPrecision, getForeignKeyExporter, getForUpdateString, getForUpdateString, getForUpdateString, getFromDual, getHibernateTypeName, getHibernateTypeName, getHqlTranslator, getIndexExporter, getInExpressionCountLimit, getKeywords, getLimitString, getLimitString, getLobMergeStrategy, getLockingStrategy, getLockRowIdentifier, getLowercaseFunction, getMaxAliasLength, getNameQualifierSupport, getNativeIdentifierGeneratorClass, getNotExpression, getNullColumnString, getNullColumnString, getNullOrdering, getPreferredSqlTypeCodeForBoolean, getQueryHintString, getQueryHintString, getRawTypeName, getRawTypeName, getReadRowLockStrategy, getSchemaNameResolver, getSelectGUIDString, getSelectSequenceNextValString, getSequenceExporter, getSequenceInformationExtractor, getSequenceNextValString, getSequenceNextValString, getSizeStrategy, getSqmTranslatorFactory, getTableAliasSeparator, getTableComment, getTableExporter, getTableTypeString, getTypeName, getTypeName, getTypeName, getTypeName, getUniqueDelegate, getUniqueKeyExporter, hasAlterTable, hasSelfReferentialForeignKeyBug, inlineLiteral, isEmptyStringTreatedAsNull, isJdbcLogWarningsEnabledByDefault, isLockTimeoutParameterized, isTypeNameRegistered, openQuote, prependComment, quote, registerColumnType, registerColumnType, registerHibernateType, registerHibernateType, registerKeyword, registerResultSetOutParameter, remapSqlTypeDescriptor, renderOrderByElement, replaceResultVariableInOrderByClauseWithPosition, requiresCastingOfParametersInSelectClause, requiresFloatCastingOfIntegerDivision, resolveSqlTypeDescriptor, supportsBindAsCallableArgument, supportsBitType, supportsCascadeDelete, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsExistsInSelect, supportsExpectedLobUsagePattern, supportsFractionalTimestampArithmetic, supportsIfExistsAfterConstraintName, supportsIfExistsAfterTableName, supportsLimit, supportsLimitOffset, supportsLockTimeouts, supportsNamedParameters, supportsNationalizedTypes, supportsNoColumnsInsert, supportsNotNullUnique, supportsNullPrecedence, supportsOrderByInSubquery, supportsOrdinalSelectItemReference, supportsParametersInInsertSelect, supportsPooledSequences, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsRowValueConstructorSyntaxInInSubquery, supportsRowValueConstructorSyntaxInSet, supportsSelectQueryWithoutFromClause, supportsSequences, supportsSubqueryInSelect, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTemporalLiteralOffset, supportsTemporaryTables, supportsTruncateWithCast, supportsTupleCounts, supportsTupleDistinctCounts, supportsTuplesInSubqueries, supportsUnionAll, supportsUnionInSubquery, supportsUnique, supportsUniqueConstraintInCreateAlterTable, supportsValuesListForInsert, supportsVariableLimit, toString, transformSelectString, translateDurationField, trimPattern, useFollowOnLocking, useMaxForLimit

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - PostgreSQLDialect
```
public PostgreSQLDialect(DialectResolutionInfo info)
```
  - PostgreSQLDialect
```
public PostgreSQLDialect()
```
  - PostgreSQLDialect
```
public PostgreSQLDialect(int version)
```
- Method Detail
  - getVersion
```
public int getVersion()
```
    Specified by:
    
    getVersion 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 java.sql.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 java.sql.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 java.time.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
  - 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)
```
    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 first argument
    
    temporalType - true if the third argument is a
  - 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
  - extractField
```
protected void extractField(StringBuilder pattern,
                            TemporalUnit unit,
                            TemporalType fromTimestamp,
                            TemporalType toTimestamp,
                            TemporalUnit toUnit)
```
  - supportsTimezoneTypes
```
public boolean supportsTimezoneTypes()
```
    Description copied from class: Dialect
    
    Whether the Dialect supports timezone types like Types.TIMESTAMP_WITH_TIMEZONE.
    
    Overrides:
    
    supportsTimezoneTypes in class Dialect
  - initializeFunctionRegistry
```
public void initializeFunctionRegistry(QueryEngine queryEngine)
```
    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
    - 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])
    - sign(arg)
    - sin(arg)
    - cos(arg)
    - tan(arg)
    - asin(arg)
    - acos(arg)
    - atan(arg)
    - atan2(arg0, arg1)
    - round(arg0, arg1)
    - least(arg0, arg1, ...)
    - greatest(arg0, arg1, ...)
    - format(datetime as pattern)
    - 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)
    Overrides:
    
    initializeFunctionRegistry in class Dialect
  - getSqlTypeDescriptorOverride
```
public JdbcTypeDescriptor getSqlTypeDescriptorOverride(int sqlCode)
```
    Description copied from class: Dialect
    
    Returns the JdbcTypeDescriptor that should be used to handle the given JDBC type code. Returns null if there is no override.
    
    Overrides:
    
    getSqlTypeDescriptorOverride in class Dialect
    
    Parameters:
    
    sqlCode - A Types constant indicating the SQL column type
    
    Returns:
    
    The JdbcTypeDescriptor to use as an override, or null if there is no override.
  - supportsIfExistsBeforeTableName
```
public boolean supportsIfExistsBeforeTableName()
```
    Description copied from class: Dialect
    
    For dropping a table, can the phrase "if exists" be applied before the table name?
    NOTE : Only one or the other (or neither) of this and Dialect.supportsIfExistsAfterTableName() should return true
    
    Overrides:
    
    supportsIfExistsBeforeTableName in class Dialect
    
    Returns:
    
    true if the "if exists" can be applied before the table name
  - supportsIfExistsBeforeConstraintName
```
public boolean supportsIfExistsBeforeConstraintName()
```
    Description copied from class: Dialect
    
    For dropping a constraint with an "alter table", can the phrase "if exists" be applied before the constraint name?
    NOTE : Only one or the other (or neither) of this and Dialect.supportsIfExistsAfterConstraintName() should return true
    
    Overrides:
    
    supportsIfExistsBeforeConstraintName in class Dialect
    
    Returns:
    
    true if the "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 the "if exists" can be applied after ALTER TABLE
  - supportsValuesList
```
public boolean supportsValuesList()
```
    Description copied from class: Dialect
    
    Does this dialect/database support VALUES list (e.g. VALUES (1), (2), (3) )
    
    Overrides:
    
    supportsValuesList in class Dialect
    
    Returns:
    
    true if VALUES list are supported
  - supportsRowValueConstructorSyntaxInInList
```
public boolean supportsRowValueConstructorSyntaxInInList()
```
    Description copied from class: Dialect
    
    If the dialect supports row values, does it offer such support in IN lists as well?
    For example, "... where (FIRST_NAME, LAST_NAME) IN ( (?, ?), (?, ?) ) ..."
    
    Overrides:
    
    supportsRowValueConstructorSyntaxInInList in class Dialect
    
    Returns:
    
    True if this SQL dialect is known to support "row value constructor" syntax in the IN list; false otherwise.
  - supportsPartitionBy
```
public boolean supportsPartitionBy()
```
    Description copied from class: Dialect
    
    Does the underlying database support partition by
    
    Overrides:
    
    supportsPartitionBy in class Dialect
    
    Returns:
    
    boolean
  - supportsNonQueryWithCTE
```
public boolean supportsNonQueryWithCTE()
```
    Description copied from class: Dialect
    
    Does this dialect/database support non-query statements (e.g. INSERT, UPDATE, DELETE) with CTE (Common Table Expressions)?
    
    Overrides:
    
    supportsNonQueryWithCTE in class Dialect
    
    Returns:
    
    true if non-query statements are supported with CTE
  - getSequenceSupport
```
public SequenceSupport getSequenceSupport()
```
    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.
    
    See Also:
    
    SchemaUpdate
  - getLimitHandler
```
public LimitHandler getLimitHandler()
```
    Description copied from class: Dialect
    
    Returns a LimitHandler that implements support for Query.setMaxResults(int) and Query.setFirstResult(int) for this dialect.
    
    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 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.
    
    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. This is not possible on some databases.
    
    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 function that can do case insensitive like comparison.
    
    Overrides:
    
    getCaseInsensitiveLike in class Dialect
    
    Returns:
    
    The dialect-specific "case insensitive" like function.
  - supportsCaseInsensitiveLike
```
public boolean supportsCaseInsensitiveLike()
```
    Description copied from class: Dialect
    
    Does this dialect support case insensitive LIKE restrictions?
    
    Overrides:
    
    supportsCaseInsensitiveLike in class Dialect
    
    Returns:
    
    true if the underlying database supports case insensitive like comparison, false otherwise. The default is false.
  - getNativeIdentifierGeneratorStrategy
```
public String getNativeIdentifierGeneratorStrategy()
```
    Description copied from class: Dialect
    
    Resolves the native generation strategy associated to this dialect.
    Comes into play whenever the user specifies the native generator.
    
    Overrides:
    
    getNativeIdentifierGeneratorStrategy in class Dialect
    
    Returns:
    
    The native generator strategy.
  - 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.
  - getSelectClauseNullString
```
public String getSelectClauseNullString(int sqlType)
```
    Workaround for postgres bug #1453
    Given a Types type code, determine an appropriate null value to use in a select clause.
    One thing to consider here is that certain databases might require proper casting for the nulls here since the select here will be part of a UNION/UNION ALL.
    
    Overrides:
    
    getSelectClauseNullString in class Dialect
    
    Parameters:
    
    sqlType - The Types type code.
    
    Returns:
    
    The appropriate select clause value fragment.
  - supportsCommentOn
```
public boolean supportsCommentOn()
```
    Description copied from class: Dialect
    
    Does this dialect/database support commenting on tables, columns, etc?
    
    Overrides:
    
    supportsCommentOn in class Dialect
    
    Returns:
    
    true if commenting is supported
  - 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.
  - requiresParensForTupleDistinctCounts
```
public boolean requiresParensForTupleDistinctCounts()
```
    Description copied from class: Dialect
    
    If Dialect.supportsTupleDistinctCounts() is true, does the Dialect require the tuple to be wrapped with parens?
    
    Overrides:
    
    requiresParensForTupleDistinctCounts in class Dialect
    
    Returns:
    
    boolean
  - 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.
  - buildIdentifierHelper
```
public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder,
                                              DatabaseMetaData dbMetaData)
                                       throws SQLException
```
    Description copied from class: Dialect
    Build the IdentifierHelper indicated by this Dialect for handling identifier conversions. Returning null is allowed and indicates that Hibernate should fallback 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 semi-configured IdentifierHelper builder.
    
    dbMetaData - Access to the metadata returned from the driver if needed and if available. WARNING: 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 re-throw and Hibernate will handle.
    
    See Also:
    
    Dialect.getNameQualifierSupport()
  - getFallbackSqmMutationStrategy
```
public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(EntityMappingType rootEntityDescriptor,
                                                                    RuntimeModelCreationContext runtimeModelCreationContext)
```
    Overrides:
    
    getFallbackSqmMutationStrategy in class Dialect
  - getSqlAstTranslatorFactory
```
public SqlAstTranslatorFactory getSqlAstTranslatorFactory()
```
    Description copied from class: Dialect
    
    Return an SqlAstTranslatorFactory specific for the Dialect. Return null to use Hibernate's standard translator.
    
    Overrides:
    
    getSqlAstTranslatorFactory in class Dialect
    
    See Also:
    
    StandardSqlAstTranslatorFactory, JdbcEnvironment.getSqlAstTranslatorFactory()
  - getViolatedConstraintNameExtractor
```
public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor()
```
    Specified by:
    
    getViolatedConstraintNameExtractor in interface ConversionContext
    
    Overrides:
    
    getViolatedConstraintNameExtractor in class Dialect
  - buildSQLExceptionConversionDelegate
```
public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate()
```
    Description copied from class: Dialect
    Build an instance of a SQLExceptionConversionDelegate for interpreting dialect-specific error or SQLState codes.
    When Dialect.buildSQLExceptionConverter() returns null, the default SQLExceptionConverter is used to interpret SQLState and error 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 JDBC 4 defined SQLException hierarchy;
    2. a delegate that interprets SQLState codes for either X/Open or SQL-2003 codes, depending on java.sql.DatabaseMetaData#getSQLStateType
    It is strongly recommended that specific Dialect implementations override this method, since interpretation of a SQL error is much more accurate when based on the vendor-specific ErrorCode rather than the SQLState.
    Specific Dialects may override to return whatever is most appropriate for that vendor.
    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 (either OUT, or the new REF_CURSOR param type available in Java 8) capable of returning ResultSet *by position*. Pre-Java 8, registering such ResultSet-returning parameters varied greatly across database and drivers; hence its inclusion as part of the Dialect contract.
    
    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.
  - 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.
  - 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).
    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:
    
    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?
    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.
  - supportsRowValueConstructorSyntax
```
public boolean supportsRowValueConstructorSyntax()
```
    Description copied from class: Dialect
    
    Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax; sometimes called tuple syntax.
    Basically, does it support syntax like "... where (FIRST_NAME, LAST_NAME) = ('Steve', 'Ebersole') ...".
    
    Overrides:
    
    supportsRowValueConstructorSyntax in class Dialect
    
    Returns:
    
    True if this SQL dialect is known to support "row value constructor" syntax; false otherwise.
  - supportsRowValueConstructorSyntaxInQuantifiedPredicates
```
public boolean supportsRowValueConstructorSyntaxInQuantifiedPredicates()
```
    Description copied from class: Dialect
    
    Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax; sometimes called tuple syntax with quantified predicates.
    Basically, does it support syntax like "... where (FIRST_NAME, LAST_NAME) = ALL (select ...) ...".
    
    Overrides:
    
    supportsRowValueConstructorSyntaxInQuantifiedPredicates in class Dialect
    
    Returns:
    
    True if this SQL dialect is known to support "row value constructor" syntax with quantified predicates; false otherwise.
  - supportsSelectAliasInGroupByClause
```
public boolean supportsSelectAliasInGroupByClause()
```
    Overrides:
    
    supportsSelectAliasInGroupByClause in class Dialect
  - getCallableStatementSupport
```
public CallableStatementSupport getCallableStatementSupport()
```
    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.
    
    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 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:
    
    boolean
  - getIdentityColumnSupport
```
public IdentityColumnSupport getIdentityColumnSupport()
```
    Description copied from class: Dialect
    
    Get the appropriate IdentityColumnSupport
    
    Overrides:
    
    getIdentityColumnSupport in class Dialect
    
    Returns:
    
    the IdentityColumnSupport
  - getNationalizationSupport
```
public NationalizationSupport getNationalizationSupport()
```
    Overrides:
    
    getNationalizationSupport in class Dialect
  - 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.
  - translateDatetimeFormat
```
public String translateDatetimeFormat(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 all of the 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.
    Overrides:
    
    translateDatetimeFormat in class Dialect
    
    Returns:
    
    a pattern accepted by the function that formats dates and times in this 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
  - formatBinaryLiteral
```
public String formatBinaryLiteral(byte[] bytes)
```
    Overrides:
    
    formatBinaryLiteral in class Dialect
  - wrapDateLiteral
```
protected String wrapDateLiteral(String date)
```
    Overrides:
    
    wrapDateLiteral in class Dialect
  - wrapTimeLiteral
```
protected String wrapTimeLiteral(String time)
```
    Overrides:
    
    wrapTimeLiteral in class Dialect
  - wrapTimestampLiteral
```
protected String wrapTimestampLiteral(String timestamp)
```
    Overrides:
    
    wrapTimestampLiteral in class Dialect
  - 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 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.
  - 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 of the returned string is treated the same as 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 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 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/database 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/database 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/database support SKIP_LOCKED timeout.
    
    Overrides:
    
    supportsSkipLocked in class Dialect
    
    Returns:
    
    true if SKIP_LOCKED is supported
  - supportsOffsetInSubquery
```
public boolean supportsOffsetInSubquery()
```
    Description copied from class: Dialect
    
    Does this dialect support offset in subqueries? Ex: select * from Table1 where col1 in (select col1 from Table2 order by col2 limit 1 offset 1)
    
    Overrides:
    
    supportsOffsetInSubquery in class Dialect
    
    Returns:
    
    boolean
  - 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.
  - 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.
  - getWriteRowLockStrategy
```
public RowLockStrategy getWriteRowLockStrategy()
```
    Description copied from class: Dialect
    
    The row lock strategy to use for write locks.
    
    Overrides:
    
    getWriteRowLockStrategy in class Dialect
  - getGroupBySummarizationRenderingStrategy
```
public GroupBySummarizationRenderingStrategy getGroupBySummarizationRenderingStrategy()
```
    Description copied from class: Dialect
    
    The strategy to use for rendering summarizations in the GROUP BY clause.
    
    Overrides:
    
    getGroupBySummarizationRenderingStrategy in class Dialect
  - getGroupByConstantRenderingStrategy
```
public GroupByConstantRenderingStrategy getGroupByConstantRenderingStrategy()
```
    Description copied from class: Dialect
    
    The strategy to use for rendering constants in the GROUP BY clause.
    
    Overrides:
    
    getGroupByConstantRenderingStrategy 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
    
    Allows the Dialect to contribute additional types
    
    Overrides:
    
    contributeTypes in class Dialect
    
    Parameters:
    
    typeContributions - Callback to contribute the types
    
    serviceRegistry - The service registry

Class PostgreSQLDialect

Nested Class Summary

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

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

PostgreSQLDialect

PostgreSQLDialect

Method Detail

getVersion

currentTime

currentTimestamp

currentTimestampWithTimeZone

extractPattern

getFractionalSecondPrecisionInNanos

timestampaddPattern

timestampdiffPattern

extractField

supportsTimezoneTypes

initializeFunctionRegistry

getSqlTypeDescriptorOverride

supportsIfExistsBeforeTableName

supportsIfExistsBeforeConstraintName

supportsIfExistsAfterAlterTable

supportsValuesList

supportsRowValueConstructorSyntaxInInList

supportsPartitionBy

supportsNonQueryWithCTE

getSequenceSupport

getCascadeConstraintsString

getQuerySequencesString

getLimitHandler

getForUpdateString

getForUpdateString

getNoColumnsInsertString

getCaseInsensitiveLike

supportsCaseInsensitiveLike

getNativeIdentifierGeneratorStrategy

supportsOuterJoinForUpdate

useInputStreamToInsertBlob

getSelectClauseNullString

supportsCommentOn

supportsCurrentTimestampSelection

isCurrentTimestampSelectStringCallable

getCurrentTimestampSelectString

requiresParensForTupleDistinctCounts

toBooleanValueString

buildIdentifierHelper

getFallbackSqmMutationStrategy

getSqlAstTranslatorFactory

getViolatedConstraintNameExtractor

buildSQLExceptionConversionDelegate

registerResultSetOutParameter

getResultSet

supportsEmptyInList

supportsLobValueChangePropagation

supportsUnboundedLobLocatorMaterialization

supportsRowValueConstructorSyntax

supportsRowValueConstructorSyntaxInQuantifiedPredicates

supportsSelectAliasInGroupByClause

getCallableStatementSupport

getResultSet

getResultSet

qualifyIndexName

getIdentityColumnSupport

getNationalizationSupport

supportsJdbcConnectionLobCreation

translateDatetimeFormat

datetimeFormat

translateExtractField

formatBinaryLiteral

wrapDateLiteral

wrapTimeLiteral

wrapTimestampLiteral

getWriteLockString