java.lang.Object
- org.hibernate.dialect.Dialect
- - org.hibernate.dialect.H2Dialect

All Implemented Interfaces:

FunctionContributor, TypeContributor, ConversionContext
```
public class H2Dialect
extends Dialect
```
A SQL dialect for H2.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class H2Dialect.OrdinalParameterMarkerStrategy
- 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, LEGACY_LOB_MERGE_STRATEGY, LOG_BASE2OF10, NEW_LOCATOR_LOB_MERGE_STRATEGY, QUOTE, STANDARD_MULTI_KEY_LOAD_SIZING_STRATEGY, STREAM_XFER_LOB_MERGE_STRATEGY

Constructor Summary

Constructors
Constructor Description

H2Dialect()

H2Dialect(DatabaseVersion version)

H2Dialect(DialectResolutionInfo info)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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`	`augmentPhysicalTableTypes(List<String> tableTypesList)`
`SQLExceptionConversionDelegate`	`buildSQLExceptionConversionDelegate()`	An instance of `SQLExceptionConversionDelegate` for interpreting dialect-specific error or SQLState codes.
`boolean`	`canDisableConstraints()`	Is there some way to disable foreign key constraint checking while truncating tables? (If there's no way to do it, and if we can't batch truncate, we must drop and recreate the constraints instead.)
`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`.
`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.
`boolean`	`doesReadCommittedCauseWritersToBlockReaders()`	For the underlying database, is `READ_COMMITTED` isolation implemented by forcing readers to wait for write locks to be released?
`boolean`	`dropConstraints()`	Do we need to drop constraints before dropping tables in this dialect?
`String`	`extractPattern(TemporalUnit unit)`	In H2, the extract() function does not return fractional seconds for the field `TemporalUnit.SECOND`.
`String`	`generatedAs(String generatedAs)`	The `generated as` clause, or similar, for generated column declarations in DDL statements.
`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`	`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`	`getCurrentTimestampSelectString()`	The command used to retrieve the current timestamp from the database.
`boolean`	`getDefaultNonContextualLobCreation()`	The default value to use for the configuration property "hibernate.jdbc.lob.non_contextual_creation".
`int`	`getDefaultStatementBatchSize()`	The default value to use for the configuration property "hibernate.jdbc.batch_size".
`String`	`getDisableConstraintsStatement()`	A SQL statement that temporarily disables foreign key constraint checking for all tables.
`String`	`getEnableConstraintsStatement()`	A SQL statement that re-enables foreign key constraint checking for all tables.
`SqmMultiTableInsertStrategy`	`getFallbackSqmInsertStrategy(EntityMappingType entityDescriptor, RuntimeModelCreationContext runtimeModelCreationContext)`	The `SqmMultiTableInsertStrategy` to use when not specified by `QueryEngineOptions.getCustomSqmMultiTableInsertStrategy()`.
`SqmMultiTableMutationStrategy`	`getFallbackSqmMutationStrategy(EntityMappingType entityDescriptor, RuntimeModelCreationContext runtimeModelCreationContext)`	The `SqmMultiTableMutationStrategy` to use when not specified by `QueryEngineOptions.getCustomSqmMultiTableMutationStrategy()`.
`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)`.
`protected int`	`getMaximumArraySize()`	H2 requires a very special emulation, because `unnest` is pretty much useless, due to https://github.com/h2database/h2database/issues/1815.
`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.
`ParameterMarkerStrategy`	`getNativeParameterMarkerStrategy()`	Support for native parameter markers.
`NullOrdering`	`getNullOrdering()`	Returns the default ordering of null.
`String`	`getQueryHintString(String query, String hints)`	Apply a hint to the given SQL query.
`String`	`getQuerySequencesString()`	Get the `select` command used retrieve the names of all sequences.
`SequenceInformationExtractor`	`getSequenceInformationExtractor()`	A `SequenceInformationExtractor` which is able to extract `SequenceInformation` from the JDBC result set returned when `Dialect.getQuerySequencesString()` is executed.
`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.
`TemporaryTableKind`	`getSupportedTemporaryTableKind()`	The kind of temporary tables that are supported on this database.
`BeforeUseAction`	`getTemporaryTableBeforeUseAction()`	The action to take before beginning use of a temporary table.
`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`.
`boolean`	`hasOddDstBehavior()`
`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?
`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 position)`	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 typeName, String baseTypeName, TypeConfiguration typeConfiguration)`	Resolves the `SqlTypes` type code for the given column type name as reported by the database and the base type name (i.e.
`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`	`supportsCaseInsensitiveLike()`	Does this dialect support case-insensitive `LIKE` comparisons?
`boolean`	`supportsCommentOn()`	Does this dialect support commenting on tables and columns?
`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`	`supportsIfExistsAfterAlterTable()`	For an `alter table`, can the phrase `if exists` be applied?
`boolean`	`supportsIfExistsAfterTableName()`	For dropping a table, can the phrase `if exists` be applied after the table name?
`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`	`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`	`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`	`supportsOffsetInSubquery()`	Does this dialect support `offset` in subqueries?
`boolean`	`supportsRecursiveCTE()`	Does this dialect/database support recursive CTEs?
`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`	`supportsTimeLiteralOffset()`
`boolean`	`supportsTupleCounts()`	Does this dialect support `count(a,b)`?
`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`	`useArrayForMultiValuedParameters()`	Does this database prefer to use array types for multi-valued parameters.

Methods inherited from class org.hibernate.dialect.Dialect
addSqlHintOrComment, appendArrayLiteral, appendBinaryLiteral, appendIntervalLiteral, appendLiteral, appendLockHint, appendUUIDLiteral, applyLocksToSql, augmentRecognizedTableTypes, buildIdentifierHelper, canBatchTruncate, canCreateCatalog, canCreateSchema, castPattern, checkVersion, closeQuote, contribute, contributeFunctions, currentDate, currentLocalTime, currentLocalTimestamp, defaultScrollMode, doesRepeatableReadCauseReadersToBlockWriters, equivalentTypes, escapeComment, forceLobAsLastValue, getAddColumnString, getAddColumnSuffixString, getAddForeignKeyConstraintString, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getAggregateSupport, getAlterTableString, getArrayTypeName, getAuxiliaryDatabaseObjectExporter, getBatchLoadSizingStrategy, getCallableStatementSupport, getCheckCondition, getCheckCondition, getCheckCondition, getCheckCondition, getColumnAliasExtractor, getColumnComment, getCreateCatalogCommand, getCreateEnumTypeCommand, getCreateEnumTypeCommand, getCreateIndexString, getCreateIndexTail, getCreateMultisetTableString, getCreateSchemaCommand, getCreateTableString, getCreateTemporaryTableColumnAnnotation, getCreateUserDefinedTypeExtensionsString, getCreateUserDefinedTypeKindString, getCurrentSchemaCommand, getDefaultDecimalPrecision, getDefaultIntervalSecondScale, getDefaultLobLength, getDefaultProperties, getDefaultTimestampPrecision, getDefaultUseGetGeneratedKeys, getDisableConstraintStatement, getDmlTargetColumnQualifierSupport, getDoublePrecision, getDropCatalogCommand, getDropEnumTypeCommand, getDropEnumTypeCommand, getDropForeignKeyString, getDropSchemaCommand, getDropTableString, getDropUniqueKeyString, getEnableConstraintStatement, getEnumTypeDeclaration, getEnumTypeDeclaration, getFallbackSchemaManagementTool, getFloatPrecision, getForeignKeyExporter, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateSkipLockedString, getForUpdateSkipLockedString, getForUpdateString, getForUpdateString, getForUpdateString, getForUpdateString, getForUpdateString, getFractionalSecondPrecisionInNanos, getHqlTranslator, getIndexExporter, getInExpressionCountLimit, getKeywords, getLobMergeStrategy, getLockingStrategy, getLockRowIdentifier, getLowercaseFunction, getMaxAliasLength, getMaxIdentifierLength, getMaxNVarcharCapacity, getMaxNVarcharLength, getMaxVarbinaryCapacity, getMaxVarbinaryLength, getMaxVarcharCapacity, getMultiKeyLoadSizingStrategy, getNameQualifierSupport, getNationalizationSupport, getNativeIdentifierGeneratorStrategy, getNoColumnsInsertString, getNullColumnString, getNullColumnString, getParameterCountLimit, getPreferredSqlTypeCodeForArray, getPreferredSqlTypeCodeForBoolean, getQueryHintString, getReadLockString, getReadLockString, getReadRowLockStrategy, getResultSet, getResultSet, getResultSet, getRowIdColumnString, getSchemaNameResolver, getSelectClauseNullString, getSelectGUIDString, getSequenceExporter, getSizeStrategy, getSqmTranslatorFactory, getTableCleaner, getTableComment, getTableExporter, getTableMigrator, getTableTypeString, getTemporaryTableAfterUseAction, getTemporaryTableCreateCommand, getTemporaryTableCreateOptions, getTemporaryTableDdlTransactionHandling, getTemporaryTableDropCommand, getTemporaryTableExporter, getTemporaryTableTruncateCommand, getTimeoutInSeconds, getTruncateTableStatement, getTruncateTableStatements, getUniqueKeyExporter, getUserDefinedTypeComment, getUserDefinedTypeExporter, getVersion, getWriteLockString, getWriteLockString, getWriteRowLockStrategy, hasAlterTable, hasDataTypeBeforeGeneratedAs, hasSelfReferentialForeignKeyBug, initDefaultProperties, inlineLiteral, isAnsiNullOn, isEmptyStringTreatedAsNull, isJdbcLogWarningsEnabledByDefault, isLob, isLockTimeoutParameterized, openQuote, ordinal, prependComment, qualifyIndexName, quote, quoteCollation, registerDefaultKeywords, registerKeyword, registerKeywords, registerResultSetOutParameter, requiresCastForConcatenatingNonStrings, requiresFloatCastingOfIntegerDivision, requiresParensForTupleCounts, resolveSqlTypeLength, supportsBatchUpdates, supportsBindAsCallableArgument, supportsBitType, supportsCascadeDelete, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsExistsInSelect, supportsExpectedLobUsagePattern, supportsFractionalTimestampArithmetic, supportsIfExistsAfterConstraintName, supportsIfExistsAfterTypeName, supportsIfExistsBeforeTypeName, supportsInsertReturningGeneratedKeys, supportsJdbcConnectionLobCreation, supportsLateral, supportsLockTimeouts, supportsMaterializedLobAccess, supportsNamedParameters, supportsNoColumnsInsert, supportsNonQueryWithCTE, supportsNoWait, supportsNullPrecedence, supportsOrderByInSubquery, supportsOrdinalSelectItemReference, supportsOuterJoinForUpdate, supportsParametersInInsertSelect, supportsPartitionBy, supportsPredicateAsExpression, supportsRefCursors, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsSkipLocked, supportsStandardCurrentTimestampFunction, supportsSubqueryInSelect, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTemporaryTablePrimaryKey, supportsTemporaryTables, supportsTruncateWithCast, supportsTupleDistinctCounts, supportsUnboundedLobLocatorMaterialization, supportsUnionAll, supportsUnionInSubquery, supportsValuesList, supportsValuesListForInsert, supportsWait, toBooleanValueString, toQuotedIdentifier, toString, transformSelectString, translateDurationField, trimPattern, trimPattern, useFollowOnLocking, useInputStreamToInsertBlob, useMaterializedLobWhenCapacityExceeded

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

- Constructor Detail
  - H2Dialect
```
public H2Dialect(DialectResolutionInfo info)
```
  - H2Dialect
```
public H2Dialect()
```
  - H2Dialect
```
public H2Dialect(DatabaseVersion version)
```
- Method Detail
  - 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
  - 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
  - useArrayForMultiValuedParameters
```
public boolean useArrayForMultiValuedParameters()
```
    Description copied from class: Dialect
    
    Does this database prefer to use array types for multi-valued parameters.
    
    Overrides:
    
    useArrayForMultiValuedParameters in class Dialect
    
    Returns:
    
    boolean
  - 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:
    
    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.
    Mappings for Types.TIMESTAMP and Types.TIMESTAMP_WITH_TIMEZONE should support explicit specification of precision if possible.
    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.
    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
  - 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
  - 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
  - hasOddDstBehavior
```
public boolean hasOddDstBehavior()
```
  - 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)
    
    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
  - getMaximumArraySize
```
protected int getMaximumArraySize()
```
    H2 requires a very special emulation, because unnest is pretty much useless, due to https://github.com/h2database/h2database/issues/1815. This emulation uses array_get, array_length and system_range functions to roughly achieve the same, but requires that system_range is fed with a "maximum array size".
  - augmentPhysicalTableTypes
```
public void augmentPhysicalTableTypes(List<String> tableTypesList)
```
    Overrides:
    
    augmentPhysicalTableTypes in class Dialect
  - 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
  - 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 typeName,
                                     String baseTypeName,
                                     TypeConfiguration typeConfiguration)
```
    Description copied from class: Dialect
    
    Resolves the SqlTypes type code for the given column type name as reported by the database and the base type name (i.e. without precision, length and scale), or null if it can't be resolved.
    
    Overrides:
    
    resolveSqlTypeCode 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
  - 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
  - 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()
  - extractPattern
```
public String extractPattern(TemporalUnit unit)
```
    In H2, the extract() function does not return fractional seconds for the field TemporalUnit.SECOND. We work around this here with two calls to extract().
    
    Overrides:
    
    extractPattern in class Dialect
    
    Parameters:
    
    unit - the first argument
  - 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
  - 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
  - supportsTimeLiteralOffset
```
public boolean supportsTimeLiteralOffset()
```
  - supportsTemporalLiteralOffset
```
public boolean supportsTemporalLiteralOffset()
```
    Description copied from class: Dialect
    
    Does this dialect supports timezone offsets in temporal literals.
    
    Overrides:
    
    supportsTemporalLiteralOffset in class Dialect
  - 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
  - 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.
  - 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
  - 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
  - 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
  - supportsIfExistsAfterTableName
```
public boolean supportsIfExistsAfterTableName()
```
    Description copied from class: Dialect
    
    For dropping a table, can the phrase if exists be applied after the table name?
    
    Overrides:
    
    supportsIfExistsAfterTableName in class Dialect
    
    Returns:
    
    true if if exists can be applied after the table name
  - 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
  - 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
  - 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
  - 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
  - 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
  - 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
  - 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
  - dropConstraints
```
public boolean dropConstraints()
```
    Description copied from class: Dialect
    
    Do we need to drop constraints before dropping tables in this dialect?
    
    Overrides:
    
    dropConstraints in class Dialect
    
    Returns:
    
    True if constraints must be dropped prior to dropping the table; false otherwise.
  - getSequenceSupport
```
public SequenceSupport getSequenceSupport()
```
    Description copied from class: Dialect
    
    Get the appropriate SequenceSupport for this dialect.
    
    Overrides:
    
    getSequenceSupport in class Dialect
  - 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.
  - getSequenceInformationExtractor
```
public SequenceInformationExtractor getSequenceInformationExtractor()
```
    Description copied from class: Dialect
    
    A SequenceInformationExtractor which is able to extract SequenceInformation from the JDBC result set returned when Dialect.getQuerySequencesString() is executed.
    
    Overrides:
    
    getSequenceInformationExtractor in class Dialect
  - getNullOrdering
```
public NullOrdering getNullOrdering()
```
    Description copied from class: Dialect
    
    Returns the default ordering of null.
    
    Overrides:
    
    getNullOrdering in class Dialect
  - getFallbackSqmMutationStrategy
```
public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(EntityMappingType entityDescriptor,
                                                                    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 entityDescriptor,
                                                                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)
  - getSupportedTemporaryTableKind
```
public TemporaryTableKind getSupportedTemporaryTableKind()
```
    Description copied from class: Dialect
    
    The kind of temporary tables that are supported on this database.
    
    Overrides:
    
    getSupportedTemporaryTableKind in class Dialect
  - getTemporaryTableBeforeUseAction
```
public BeforeUseAction getTemporaryTableBeforeUseAction()
```
    Description copied from class: Dialect
    
    The action to take before beginning use of a temporary table.
    
    Overrides:
    
    getTemporaryTableBeforeUseAction in class Dialect
  - 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:
    
    a "static" delegate based on the JDBC4-defined SQLException hierarchy, and
    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
  - 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
  - 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.
  - 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.
  - 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
  - doesReadCommittedCauseWritersToBlockReaders
```
public boolean doesReadCommittedCauseWritersToBlockReaders()
```
    Description copied from class: Dialect
    
    For the underlying database, is READ_COMMITTED isolation implemented by forcing readers to wait for write locks to be released?
    
    Overrides:
    
    doesReadCommittedCauseWritersToBlockReaders in class Dialect
    
    Returns:
    
    True if writers block readers to achieve READ_COMMITTED; 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
  - 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.
  - 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
  - getIdentityColumnSupport
```
public IdentityColumnSupport getIdentityColumnSupport()
```
    Description copied from class: Dialect
    
    Get the appropriate IdentityColumnSupport for this dialect.
    
    Overrides:
    
    getIdentityColumnSupport in class Dialect
    
    Returns:
    
    the IdentityColumnSupport
  - 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:
    
    insert ... returning ...
    select from final table (insert ... )
    Overrides:
    
    supportsInsertReturning in class Dialect
    
    Returns:
    
    true because we can use select ... from final table (insert .... )
    
    See Also:
    
    OnExecutionGenerator.getGeneratedIdentifierDelegate(org.hibernate.id.PostInsertIdentityPersister), InsertReturningDelegate
  - registerResultSetOutParameter
```
public int registerResultSetOutParameter(CallableStatement statement,
                                         int position)
                                  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.
    
    position - 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.
  - getQueryHintString
```
public String getQueryHintString(String query,
                                 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:
    
    query - The query to which to apply the hint.
    
    hints - The hints to apply
    
    Returns:
    
    The modified SQL
  - 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
  - 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
  - generatedAs
```
public String generatedAs(String generatedAs)
```
    Description copied from class: Dialect
    
    The generated as clause, or similar, for generated column declarations in DDL statements.
    
    Overrides:
    
    generatedAs in class Dialect
    
    Parameters:
    
    generatedAs - a SQL expression used to generate the column value
    
    Returns:
    
    The generated as clause containing the given expression
  - canDisableConstraints
```
public boolean canDisableConstraints()
```
    Description copied from class: Dialect
    
    Is there some way to disable foreign key constraint checking while truncating tables? (If there's no way to do it, and if we can't batch truncate, we must drop and recreate the constraints instead.)
    
    Overrides:
    
    canDisableConstraints in class Dialect
    
    Returns:
    
    true if there is some way to do it
    
    See Also:
    
    Dialect.getDisableConstraintsStatement(), Dialect.getDisableConstraintStatement(String, String)
  - getEnableConstraintsStatement
```
public String getEnableConstraintsStatement()
```
    Description copied from class: Dialect
    
    A SQL statement that re-enables foreign key constraint checking for all tables.
    
    Overrides:
    
    getEnableConstraintsStatement in class Dialect
  - getDisableConstraintsStatement
```
public String getDisableConstraintsStatement()
```
    Description copied from class: Dialect
    
    A SQL statement that temporarily disables foreign key constraint checking for all tables.
    
    Overrides:
    
    getDisableConstraintsStatement in class Dialect
  - getUniqueDelegate
```
public UniqueDelegate getUniqueDelegate()
```
    Description copied from class: Dialect
    
    Get the UniqueDelegate supported by this dialect
    
    Overrides:
    
    getUniqueDelegate in class Dialect
    
    Returns:
    
    The UniqueDelegate
  - 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
  - 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
  - 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.

Constructor	Description
`H2Dialect()`
`H2Dialect(DatabaseVersion version)`
`H2Dialect(DialectResolutionInfo info)`

Class H2Dialect

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

H2Dialect

H2Dialect

H2Dialect

Method Detail

getMinimumSupportedVersion

getDefaultNonContextualLobCreation

supportsStandardArrays

useArrayForMultiValuedParameters

columnType

castType

registerColumnTypes

contributeTypes

getDefaultStatementBatchSize

hasOddDstBehavior

initializeFunctionRegistry

getMaximumArraySize

augmentPhysicalTableTypes

resolveSqlTypeCode

resolveSqlTypeDescriptor

resolveSqlTypeCode

getMaxVarcharLength

currentTime

currentTimestamp

currentTimestampWithTimeZone

getSqlAstTranslatorFactory

extractPattern

timestampaddPattern

timestampdiffPattern

appendDateTimeLiteral

appendDateTimeLiteral

appendDateTimeLiteral

supportsTimeLiteralOffset

supportsTemporalLiteralOffset

getTimeZoneSupport

supportsIsTrue

appendBooleanValueString

getLimitHandler

supportsDistinctFromPredicate

supportsIfExistsAfterTableName

supportsIfExistsBeforeTableName

supportsIfExistsAfterAlterTable

supportsIfExistsBeforeConstraintName

getCascadeConstraintsString

supportsAlterColumnType

getAlterColumnTypeString

supportsCommentOn

dropConstraints

getSequenceSupport

getQuerySequencesString

getSequenceInformationExtractor

getNullOrdering

getFallbackSqmMutationStrategy

getFallbackSqmInsertStrategy

getSupportedTemporaryTableKind

getTemporaryTableBeforeUseAction

getViolatedConstraintNameExtractor

buildSQLExceptionConversionDelegate

supportsCurrentTimestampSelection

isCurrentTimestampSelectStringCallable

getCurrentTimestampSelectString

supportsLobValueChangePropagation

supportsTupleCounts

requiresParensForTupleDistinctCounts

doesReadCommittedCauseWritersToBlockReaders

getGroupBySelectItemReferenceStrategy

supportsOffsetInSubquery

supportsWindowFunctions

supportsRecursiveCTE

supportsFetchClause

getFunctionalDependencyAnalysisSupport