Class HSQLDialect

java.lang.Object
org.hibernate.dialect.Dialect
org.hibernate.dialect.HSQLDialect
All Implemented Interfaces:
CheckConstraintSupport, ForeignKeySupport, IdentifierSupport, KeywordSupport, LiteralSupport, AlterTableSupport, ColumnDefinitionSupport, ConstraintControlSupport, IndexDdlSupport, TableCreationSupport, TruncateSupport, CurrentTemporalSupport, TemporalFormatSupport, TemporalOperationSupport, ConversionContext
public class HSQLDialect extends Dialect implements CurrentTemporalSupport, TemporalFormatSupport, TemporalOperationSupport
A SQL dialect for HSQLDB (HyperSQL) 2.6.1 and above.

This dialect does not support HSQLDB's MVCC transaction control mode.

Please refer to the HyperSQL User Guide.

  • Constructor Details

  • Method Details

    • getTemporalOperationSupport

      @SPI({IMPLEMENT,SUPPLY}) public TemporalOperationSupport getTemporalOperationSupport()
      Description copied from class: Dialect
      Supply extraction and timestamp-arithmetic syntax. Return one stable, non-null, thread-safe implementation. Providers may implement TemporalOperationSupport directly and return this.
      Overrides:
      getTemporalOperationSupport in class Dialect
      See Also:

    • getTemporalFormatSupport

      @SPI({IMPLEMENT,SUPPLY}) public TemporalFormatSupport getTemporalFormatSupport()
      Description copied from class: Dialect
      Supply datetime-format translation. Return one stable, non-null, thread-safe implementation.
      Overrides:
      getTemporalFormatSupport in class Dialect
      See Also:

    • getCurrentTemporalSupport

      @SPI({IMPLEMENT,SUPPLY}) public CurrentTemporalSupport getCurrentTemporalSupport()
      Description copied from class: Dialect
      Supply current temporal expressions and database-side timestamp retrieval. Return one stable, non-null, thread-safe implementation. Providers may implement CurrentTemporalSupport directly and return this.
      Overrides:
      getCurrentTemporalSupport in class Dialect
      See Also:

    • getMinimumSupportedVersion

      @SPI({IMPLEMENT,SUPPLY}) protected DatabaseVersion getMinimumSupportedVersion()
      Description copied from class: Dialect
      Get the version of the SQL dialect that is the minimum supported by this implementation.

      This method is called during superclass construction. Implementations must return construction-safe immutable data and must not depend on subclass initialization.

      Overrides:
      getMinimumSupportedVersion in class Dialect

    • contributeKeywords

      @SPI({USE,IMPLEMENT,SUPPLY}) protected void contributeKeywords(KeywordRegistration registration)
      Description copied from class: Dialect

      Contribute ANSI and database-specific SQL keywords.

      Invoke super first to retain the SQL:2003 words. Omitting super deliberately replaces the inherited keyword profile. Register words only during this callback and do not retain the registration target.

      Overrides:
      contributeKeywords in class Dialect
      Parameters:
      registration - the scoped keyword target

    • columnType

      @SPI({USE,IMPLEMENT}) protected String columnType(int sqlTypeCode)
      Description copied from class: Dialect

      Return the complete database column declaration pattern for a JDBC Types or Hibernate SqlTypes code used during type registration.

      Use only $l, $p, and $s for length, precision, and scale. Define distinct mappings for the LONG32 codes; the JDBC LONG synonyms are normalized before this hook. Delegate unknown inherited codes to the superclass so its standard exception remains authoritative.

      Overrides:
      columnType in class Dialect

    • resolveSqlTypeCode

      @SPI({USE,IMPLEMENT}) protected Integer resolveSqlTypeCode(String typeName, String baseTypeName, TypeConfiguration typeConfiguration)
      Description copied from class: Dialect
      Resolve a database-reported type using both its complete and normalized base names. Return null when neither identifies a registered type.
      Overrides:
      resolveSqlTypeCode in class Dialect

    • contributeDefaultProperties

      @SPI({IMPLEMENT,SUPPLY}) protected void contributeDefaultProperties(Properties properties)
      Description copied from class: Dialect

      Contribute provider configuration defaults after Dialect construction.

      Invoke super first to extend the inherited defaults. Omitting super deliberately replaces them. Mutate the supplied isolated property bag only during this callback; do not retain it or call Dialect.getDefaultProperties() from a Dialect constructor.

      Overrides:
      contributeDefaultProperties in class Dialect
      Parameters:
      properties - the isolated contribution target

    • initializeFunctionRegistry

      @SPI({IMPLEMENT,SUPPLY}) public void initializeFunctionRegistry(FunctionContributions functionContributions)
      Description copied from class: Dialect

      Contribute the database-specific function descriptors after independent function contributors have run.

      Override this callback to extend or replace the inherited function set. Invoke super first to retain Hibernate's standard and emulated registrations; omitting it deliberately replaces that set. Mutate the supplied boot-scoped function registry only during this callback, and do not retain the contribution context or registry afterward. Implement an independent FunctionContributor instead when the contribution is not owned by a Dialect.

      Overrides:
      initializeFunctionRegistry in class Dialect
      Parameters:
      functionContributions - the Hibernate-supplied function contribution target
      See Also:

    • registerArrayFunctions

      protected static void registerArrayFunctions(CommonFunctionFactory functionFactory)

    • getMaximumSeriesSize

      protected int getMaximumSeriesSize()
      HSQLDB doesn't support the generate_series function or lateral recursive CTEs, so it has to be emulated with a top level recursive CTE which requires an upper bound on the amount of elements that the series can return.

    • getDefaultOrdinalityColumnName

      @Nullable public String getDefaultOrdinalityColumnName()
      Description copied from class: Dialect

      Supplies the preferred default ordinality-column name for a set-returning function.

      Return a stable, unqualified SQL column name, or null when the database does not define a preferred name. Hibernate uses i as the fallback and applies collision suffixing where necessary. A null result does not mean that set-returning functions are unsupported.

      Overrides:
      getDefaultOrdinalityColumnName in class Dialect
      Returns:
      the preferred unqualified name, or null to use Hibernate's fallback

    • currentTime

      @SPI({USE,IMPLEMENT}) public String currentTime()
      Description copied from interface: CurrentTemporalSupport
      Render the current SQL time expression used for java.sql.Time.
      Specified by:
      currentTime in interface CurrentTemporalSupport

    • currentTimestamp

      @SPI({USE,IMPLEMENT}) public String currentTimestamp()
      Description copied from interface: CurrentTemporalSupport
      Render the current SQL timestamp expression used for java.sql.Timestamp.
      Specified by:
      currentTimestamp in interface CurrentTemporalSupport

    • currentTimestampWithTimeZone

      @SPI({USE,IMPLEMENT}) public String currentTimestampWithTimeZone()
      Description copied from interface: CurrentTemporalSupport
      Render the current timestamp-with-time-zone expression.
      Specified by:
      currentTimestampWithTimeZone in interface CurrentTemporalSupport

    • getSqlAstTranslatorFactory

      @SPI({IMPLEMENT,SUPPLY}) public SqlAstTranslatorFactory getSqlAstTranslatorFactory()
      Description copied from class: Dialect

      Supply the factory for this Dialect's single-use SQL AST translators.

      Return null to use StandardSqlAstTranslatorFactory. A custom Dialect should normally return a reusable factory derived from that class and create translators derived from AbstractSqlAstTranslator or an appropriate supported family base. The factory must not retain translation requests, and every translator it returns is used for one translation.

      Overrides:
      getSqlAstTranslatorFactory in class Dialect
      See Also:

    • castPattern

      @SPI({USE,IMPLEMENT}) public String castPattern(CastType from, CastType to)
      Description copied from class: Dialect
      Obtain a pattern for the SQL equivalent to a cast() function call. The resulting pattern must contain ?1 and ?2 placeholders for the arguments.
      Overrides:
      castPattern in class Dialect
      Parameters:
      from - a CastType indicating the type of the value argument
      to - a CastType indicating the type the value argument is cast to

    • timestampaddPattern

      @SPI({USE,IMPLEMENT}) public String timestampaddPattern(TemporalUnit unit, TemporalType temporalType, IntervalType intervalType)
      Description copied from interface: TemporalOperationSupport
      Return a timestamp-add pattern containing ?1, ?2, and ?3.
      Specified by:
      timestampaddPattern in interface TemporalOperationSupport

    • timestampdiffPattern

      @SPI({USE,IMPLEMENT}) public String timestampdiffPattern(TemporalUnit unit, TemporalType fromTemporalType, TemporalType toTemporalType)
      Description copied from interface: TemporalOperationSupport
      Return a timestamp-difference pattern containing ?1, ?2, and ?3.
      Specified by:
      timestampdiffPattern in interface TemporalOperationSupport

    • extractPattern

      @SPI({USE,IMPLEMENT}) public String extractPattern(TemporalUnit unit)
      Description copied from interface: TemporalOperationSupport
      Return an extraction pattern containing ?1 for the field and ?2 for the value.
      Specified by:
      extractPattern in interface TemporalOperationSupport

    • getPredicateSupport

      public PredicateSupport getPredicateSupport()
      Description copied from class: Dialect

      The database's native predicate syntax and predicate-placement profile.

      Override this method to supply independent support for a native case-insensitive-like operator, scalar distinct from, truthness predicates, and predicates used as value expressions. An absent case-insensitive-like operator selects Hibernate's lowercase-expression emulation. Return one immutable, non-null profile whose values remain stable for the lifetime of this Dialect; do not override individual consumers to reproduce these decisions.

      Overrides:
      getPredicateSupport in class Dialect
      Returns:
      this Dialect's stable predicate-support profile

    • getLockingSupport

      public LockingSupport getLockingSupport()
      Description copied from class: Dialect

      Supplies the cohesive pessimistic-locking profile for this Dialect.

      The profile coordinates capability metadata, statement-clause rendering, table hints, already-rendered SQL rewriting, connection timeout handling, and follow-on locking. A custom Dialect should supply one internally consistent profile instead of overriding those behaviors independently. The returned support must be non-null and stable for the Dialect lifetime; its components may be reused concurrently and must not retain per-query requests.

      Overrides:
      getLockingSupport in class Dialect
      See Also:

    • getLimitHandler

      public LimitHandler getLimitHandler()
      Description copied from class: Dialect

      Supplies execution-time pagination for already-rendered SQL requested by Query.setMaxResults(int) or Query.setFirstResult(int).

      This is distinct from SQL AST PaginationRenderingSupport, which handles offset and fetch clauses represented in the semantic tree. A custom Dialect should normally return a stock LimitHandler or extend a supported handler family. The returned handler may be reused concurrently and must not retain per-query state.

      Overrides:
      getLimitHandler in class Dialect
      Returns:
      a non-null handler

    • getIfExistsSupport

      @SPI({IMPLEMENT,SUPPLY}) public IfExistsSupport getIfExistsSupport()
      Description copied from class: Dialect

      Supply existence-check placement for schema DDL targets.

      Return one immutable profile for this Dialect's lifetime.

      Overrides:
      getIfExistsSupport in class Dialect
      See Also:

    • alterColumnType

      @SPI({USE,IMPLEMENT}) public String alterColumnType(AlterColumnTypeRequest request)
      Specified by:
      alterColumnType in interface AlterTableSupport

    • getSequenceSupport

      @SPI({IMPLEMENT,SUPPLY}) public SequenceSupport getSequenceSupport()
      Description copied from class: Dialect

      Supplies the complete sequence value-expression and lifecycle-DDL strategy for this Dialect.

      Return the same stable, thread-safe strategy for the Dialect's lifetime. Use SequenceSupports.none() when sequences are unsupported, select one of the other stock strategies only when its complete grammar matches the database, or supply a provider implementation of SequenceSupport.

      Overrides:
      getSequenceSupport in class Dialect
      Returns:
      the non-null sequence-support strategy
      See Also:

    • getSequenceInformationExtractor

      public SequenceInformationExtractor getSequenceInformationExtractor()
      Description copied from class: Dialect

      Supply the strategy Hibernate uses to discover existing database sequences and their metadata.

      Return SequenceInformationExtractors.none() when the database version does not expose sequence metadata. Configure ordinary single-query extraction with SequenceInformationExtractors.builder(String), and implement SequenceInformationExtractor directly only for a genuinely multi-stage algorithm.

      Overrides:
      getSequenceInformationExtractor in class Dialect
      See Also:

    • getArraySupport

      public ArraySupport getArraySupport()
      Description copied from class: Dialect

      The independent array syntax and multi-valued parameter-binding behavior of this Dialect.

      Override this method to supply standard element-type array support, SQL array-constructor support, and the multi-valued parameter-binding strategy. Treat these as independent dimensions: do not infer syntax support from array binding, and do not infer array binding from either syntax capability. Return one immutable, non-null profile whose values remain stable for the lifetime of this Dialect.

      Overrides:
      getArraySupport in class Dialect
      Returns:
      this Dialect's stable array-support profile

    • getViolatedConstraintNameExtractor

      @SPI({IMPLEMENT,SUPPLY}) public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor()
      Description copied from class: Dialect

      Supplies the extractor used to recover violated constraint names from database exceptions.

      The extractor returns null when a name cannot be recovered. Do not use an empty string or sentinel to represent absence.

      Specified by:
      getViolatedConstraintNameExtractor in interface ConversionContext
      Overrides:
      getViolatedConstraintNameExtractor in class Dialect
      Returns:
      the non-null constraint-name extractor
      See Also:

    • causesRollback

      public boolean causesRollback(SQLException sqlException)
      Description copied from class: Dialect

      Determine whether this database marks the current transaction for rollback after the given statement failure.

      Inspect the original database exception when the policy depends on its error code, SQL state, or subtype. This decision is independent of how Hibernate converts the exception. This determines both JDBC rollback state and whether a pessimistic lock failure becomes a JPA PessimisticLockException or LockTimeoutException.

      Overrides:
      causesRollback in class Dialect
      Parameters:
      sqlException - the original database exception
      Returns:
      true when the failed statement invalidates the transaction

    • buildSQLExceptionConversionDelegate

      @SPI({IMPLEMENT,SUPPLY}) public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate()
      Description copied from class: Dialect

      Supplies vendor-specific SQL-exception conversion for this Dialect.

      The returned delegate runs in addition to Hibernate's standard JDBC exception-hierarchy and SQL-state delegates. Its null result means that it declined the exception so conversion may continue. Return null from this method when the Dialect has no vendor-specific delegate.

      Prefer stable vendor error codes or SQL states and preserve the original SQLException.

      Overrides:
      buildSQLExceptionConversionDelegate in class Dialect
      Returns:
      the vendor conversion delegate, or null when none is supplied
      See Also:

    • getSelectClauseNullString

      @SPI({USE,IMPLEMENT}) public String getSelectClauseNullString(SqlTypedMapping sqlTypeMapping, TypeConfiguration typeConfiguration)
      Description copied from class: Dialect

      Render the complete typed-null select-item expression for one arm of a union query.

      Use the complete mapping when the database requires an explicit cast so that named and aggregate types, length, precision, scale, and temporal precision are retained. Return the complete expression, not only a type name. The standard form is the untyped SQL literal null.

      Overrides:
      getSelectClauseNullString in class Dialect
      Parameters:
      sqlTypeMapping - the complete mapping of the union select item
      typeConfiguration - the active type configuration
      Returns:
      the complete select-item expression

    • getNullOrderingSupport

      public NullOrderingSupport getNullOrderingSupport()
      Description copied from class: Dialect

      Supply the database's default null ordering and explicit null-precedence syntax capabilities.

      Override this method with a stable, non-null profile when the database's default null placement differs from NullOrderingSupport.STANDARD, or when it cannot render nulls first and nulls last natively. Dialect subclasses refining a family profile should copy Dialect.getNullOrderingSupport() from the superclass and change only the values which differ.

      Overrides:
      getNullOrderingSupport in class Dialect
      Returns:
      the stable, non-null null-ordering-support profile

    • getMultiTableMutationSupport

      public MultiTableMutationSupport getMultiTableMutationSupport()
      Description copied from class: Dialect

      Select the Hibernate-owned fallback families used for SQM update/delete and insert operations targeting entities mapped to multiple tables.

      A custom Dialect should return one of the named profiles when both operation families use the same strategy kind, or construct an asymmetric profile when they differ. Local, global, and persistent-table selections require the corresponding non-null temporary-table strategy, while CTE requires non-query CTE support.

      Configured global and entity-specific custom strategies take precedence over this fallback. Supply a custom execution implementation with QuerySettings.QUERY_MULTI_TABLE_MUTATION_STRATEGY or QuerySettings.QUERY_MULTI_TABLE_INSERT_STRATEGY instead of depending on Hibernate's internal fallback implementations.

      Overrides:
      getMultiTableMutationSupport in class Dialect
      Returns:
      a stable, non-null fallback selection profile

    • getGlobalTemporaryTableStrategy

      public TemporaryTableStrategy getGlobalTemporaryTableStrategy()
      Description copied from class: Dialect

      Supplies this Dialect's global temporary-table strategy.

      Return null when the database has no supported global temporary-table form. A non-null strategy must be stable for the Dialect lifetime and consistent with Dialect.getTemporaryTableExporter().

      Overrides:
      getGlobalTemporaryTableStrategy in class Dialect

    • getLocalTemporaryTableStrategy

      public TemporaryTableStrategy getLocalTemporaryTableStrategy()
      Description copied from class: Dialect

      Supplies this Dialect's local temporary-table strategy.

      Return null when the database has no supported local temporary-table form. A non-null strategy must be stable for the Dialect lifetime and consistent with Dialect.getTemporaryTableExporter().

      Overrides:
      getLocalTemporaryTableStrategy in class Dialect

    • getCurrentTimestampSelection

      @SPI({USE,IMPLEMENT}) public CurrentTimestampSelection getCurrentTimestampSelection()
      Description copied from interface: CurrentTemporalSupport
      Select the JDBC command used for database-side current timestamp retrieval, or return null when the database offers no supported command.
      Specified by:
      getCurrentTimestampSelection in interface CurrentTemporalSupport
      See Also:

    • getTemporalValueSemantics

      @SPI({IMPLEMENT,SUPPLY}) public TemporalValueSemantics getTemporalValueSemantics()
      Description copied from class: Dialect
      Supply temporal precision-adjustment and literal-offset semantics. Return one stable, non-null immutable profile.
      Overrides:
      getTemporalValueSemantics in class Dialect
      See Also:

    • getSchemaCommentSupport

      @SPI({IMPLEMENT,SUPPLY}) public SchemaCommentSupport getSchemaCommentSupport()
      Description copied from class: Dialect

      Supply schema-export support for comments attached to database objects.

      This strategy does not control query comments, hints, SQL AST decoration, or statement inspection. Return one stable, non-null strategy.

      Overrides:
      getSchemaCommentSupport in class Dialect
      See Also:

    • appendBooleanValueString

      @SPI({USE,IMPLEMENT}) public void appendBooleanValueString(SqlAppender appender, boolean bool)
      Description copied from interface: LiteralSupport
      Append a SQL Boolean literal expression.
      Specified by:
      appendBooleanValueString in interface LiteralSupport

    • getTupleCountSupport

      public TupleCountSupport getTupleCountSupport()
      Description copied from class: Dialect

      Supplies the database syntax for ordinary and distinct tuple counts.

      Return one non-null, immutable profile whose values remain stable for this Dialect's lifetime. Select TupleCountSupport.Syntax.UNSUPPORTED to use Hibernate's existing emulation, TupleCountSupport.Syntax.ARGUMENT_LIST for syntax such as count(a, b), or TupleCountSupport.Syntax.PARENTHESIZED_TUPLE for syntax such as count((a, b)). Configure the ordinary and distinct forms independently; a database may require different forms for them. When refining a family Dialect, copy Dialect.getTupleCountSupport() from the superclass and replace only the differing syntax choice.

      Overrides:
      getTupleCountSupport in class Dialect
      Returns:
      the non-null tuple-count-syntax profile

    • getSubquerySupport

      public SubquerySupport getSubquerySupport()
      Description copied from class: Dialect

      Supplies the database's supported subquery placements.

      Return one non-null, immutable profile whose values remain stable for this Dialect's lifetime. Declare every placement independently. In particular, scalar subqueries in the select list and exists predicates in the select list are separate capabilities. Lateral spelling and fallback rendering remain translator responsibilities. When refining a family Dialect, start from SubquerySupport.builder(super.getSubquerySupport()) and change only the differing placements.

      Overrides:
      getSubquerySupport in class Dialect
      Returns:
      this Dialect's stable subquery-support profile

    • getCteSupport

      public CteSupport getCteSupport()
      Description copied from class: Dialect

      The common-table-expression capabilities of this Dialect.

      The returned immutable profile must be non-null and stable for the lifetime of this Dialect. Hibernate may cache and reuse it. Overrides may construct a new profile or copy CteSupport.STANDARD; invoking super is not required. This method is called only after Dialect construction, has no corresponding shutdown lifecycle, and failures propagate to the operation which obtains the profile.

      Overrides:
      getCteSupport in class Dialect

    • getExpressionCoercionSupport

      public ExpressionCoercionSupport getExpressionCoercionSupport()
      Description copied from class: Dialect

      Supplies the expression-coercion adaptations required by this database.

      Return one non-null, immutable profile whose values remain stable for this Dialect's lifetime. Each requirement directs a focused rendering adaptation; it does not report general database cast support. When refining a family Dialect, start from ExpressionCoercionSupport.builder(super.getExpressionCoercionSupport()) and change only the differing requirement.

      Overrides:
      getExpressionCoercionSupport in class Dialect
      Returns:
      this Dialect's stable expression-coercion requirement profile

    • getValuesListSupport

      public ValuesListSupport getValuesListSupport()
      Description copied from class: Dialect

      The contexts in which this Dialect supports native multi-row values syntax.

      The returned immutable profile must be non-null and stable for the lifetime of this Dialect. Report only native syntax support; translator emulation is selected separately.

      Overrides:
      getValuesListSupport in class Dialect

    • getIdentityColumnSupport

      public IdentityColumnSupport getIdentityColumnSupport()
      Description copied from class: Dialect

      Supply the stable identity-column DDL, insert syntax, and identity-specific retrieval behavior for this Dialect.

      Override this method to supply a provider implementation of IdentityColumnSupport. Prefer extending IdentityColumnSupportBase and return the same immutable or otherwise stable support instance on every invocation. Do not construct Hibernate mutation delegates in this supply point.

      Overrides:
      getIdentityColumnSupport in class Dialect

    • getNameQualifierSupport

      @SPI({IMPLEMENT,SUPPLY}) public NameQualifierSupport getNameQualifierSupport()
      Description copied from class: Dialect

      Supply catalog and schema qualification support, or return null to use DatabaseMetaData.

      This value does not define the catalog separator; override Dialect.getCatalogSeparator() independently when the metadata-free fallback is not ..

      Overrides:
      getNameQualifierSupport in class Dialect
      See Also:

    • getFunctionalDependencyAnalysisSupport

      @SPI({IMPLEMENT,SUPPLY}) public FunctionalDependencyAnalysisSupport getFunctionalDependencyAnalysisSupport()
      Description copied from class: Dialect

      The database's support for recognizing primary-key functional dependency in group by and order by clauses.

      This profile controls when Hibernate may omit functionally dependent columns. Report only behavior guaranteed by the database across the Dialect's supported versions.

      Overrides:
      getFunctionalDependencyAnalysisSupport in class Dialect
      Returns:
      a non-null immutable capability profile
      See Also:

    • getSchemaDropSupport

      @SPI({IMPLEMENT,SUPPLY}) public SchemaDropSupport getSchemaDropSupport()
      Description copied from class: Dialect

      Supply schema-drop composition and ordered pre-drop commands.

      Return one immutable profile for this Dialect's lifetime.

      Overrides:
      getSchemaDropSupport in class Dialect
      See Also:

    • appendFormat

      @SPI({USE,IMPLEMENT}) public void appendFormat(SqlAppender appender, String format)
      Description copied from interface: TemporalFormatSupport
      Append the database translation of the supplied Hibernate format pattern.
      Specified by:
      appendFormat in interface TemporalFormatSupport

    • translateExtractField

      @SPI({USE,IMPLEMENT}) public String translateExtractField(TemporalUnit unit)
      Description copied from interface: TemporalOperationSupport
      Translate an extraction field name.
      Specified by:
      translateExtractField in interface TemporalOperationSupport

    • buildIdentifierHelper

      @SPI({USE,IMPLEMENT,SUPPLY}) public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuildRequest request)
      Description copied from interface: IdentifierSupport

      Build and supply the configured identifier helper from the stable JDBC metadata snapshot and selected keyword strategy.

      This inherited implementation initializes identifier casing, keywords, and namespace support from the request. Invoke it before replacing any of those values with authoritative provider settings, then build the final helper from the same builder. Settings which this implementation does not initialize may be applied before invoking it. If builder configuration cannot express a database rule, decorate the final helper with DelegatingIdentifierHelper. Do not retain the request, builder, or metadata view.

      Specified by:
      buildIdentifierHelper in interface IdentifierSupport
      See Also:

    • getUniqueDelegate

      @SPI({IMPLEMENT,SUPPLY}) public UniqueDelegate getUniqueDelegate()
      Description copied from class: Dialect

      Supply the stable strategy used for unique-key representation and DDL.

      Return a stock profile from UniqueDelegates, or a stable provider-owned implementation or decorator. Do not import a Hibernate .internal leaf.

      Overrides:
      getUniqueDelegate in class Dialect
      See Also:

    • quoteCollation

      @SPI({USE,IMPLEMENT}) public String quoteCollation(String collation)
      Description copied from interface: IdentifierSupport
      Render a collation name used in a column definition.
      Specified by:
      quoteCollation in interface IdentifierSupport

    • getDmlTargetColumnQualifierSupport

      @SPI({USE,IMPLEMENT,SUPPLY}) public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport()
      Description copied from class: Dialect

      The qualifier form accepted for target-column references in update and delete statements.

      Translators use this value when rendering assignments and predicates. A custom Dialect should return the least permissive form required by the database, not a form used only by an emulation.

      Overrides:
      getDmlTargetColumnQualifierSupport in class Dialect
      Returns:
      the non-null target-column qualifier support
      See Also:

    • getSingleRowTableSupport

      public SingleRowTableSupport getSingleRowTableSupport()
      Description copied from class: Dialect

      Supply the SQL renderings used for a reusable single-row table and for an otherwise table-less select.

      Override this method with one stable, non-null profile when either rendering differs from SingleRowTableSupport.STANDARD. The table expression and the complete select-only from fragment are independent; an empty fragment means that no from clause is required. Dialect subclasses refining a family profile should copy Dialect.getSingleRowTableSupport() from the superclass and change only the values which differ.

      Overrides:
      getSingleRowTableSupport in class Dialect
      Returns:
      the stable, non-null single-row-table-support profile

    • supportsFilterClause

      public boolean supportsFilterClause()
      Description copied from class: Dialect

      Whether this database supports native aggregate filter (where ...) syntax.

      Return a stable answer for this Dialect's lifetime. A false result directs aggregate rendering to use the existing case-expression emulation; it does not mean that filtered aggregates are unsupported.

      Overrides:
      supportsFilterClause in class Dialect

    • getRowValueSupport

      public RowValueSupport getRowValueSupport()
      Description copied from class: Dialect

      The native row-value syntax of this Dialect.

      Override this method to supply explicit row(a, b) construction, row equality, ordering, and distinctness comparisons, row-valued IN lists, row-valued IN subqueries, and quantified row comparisons. Treat each feature as an exact native-syntax declaration: do not infer IN-subquery support from IN-list support or explicit row construction from comparison support. Copy the superclass profile when refining an inherited Dialect family. Return one immutable, non-null profile whose values remain stable for the lifetime of this Dialect.

      Overrides:
      getRowValueSupport in class Dialect
      Returns:
      this Dialect's stable row-value-support profile

    • createOptionalTableUpdateOperation

      @SPI({USE,IMPLEMENT,SUPPLY}) public MutationOperation createOptionalTableUpdateOperation(OptionalTableUpdateOperationRequest request)
      Description copied from class: Dialect

      Creates the JDBC mutation operation for an optional-table update.

      Override this factory when the database needs an operation other than the standard update-then-insert behavior. The request contains the semantic update and bootstrap services; implementations must return an operation for the same OptionalTableUpdateOperationRequest.mutationTarget() and must not retain the request.

      Overrides:
      createOptionalTableUpdateOperation in class Dialect
      Returns:
      a non-null operation for the supplied optional-table update
      See Also:

    • getNamespaceSupport

      @SPI({IMPLEMENT,SUPPLY}) public NamespaceSupport getNamespaceSupport()
      Description copied from class: Dialect

      Supply catalog and schema lifecycle behavior to schema tooling.

      Return one stable, non-null strategy. Prefer a complete immutable profile from NamespaceSupports, and implement NamespaceSupport directly only for custom or multi-command namespace SQL.

      Overrides:
      getNamespaceSupport in class Dialect
      See Also: