Module eclipselink
Package org.eclipse.persistence.platform.database

Class MaxDBPlatform

  • All Implemented Interfaces:
    Serializable, Cloneable, org.eclipse.persistence.internal.core.databaseaccess.CorePlatform<org.eclipse.persistence.internal.helper.ConversionManager>, org.eclipse.persistence.internal.databaseaccess.Platform
    public final class MaxDBPlatform
extends DatabasePlatform
    Database Platform for SAP MaxDB.

    Wiki page

    Usage

    The MaxDB platform is configured in the persistence.xml by the following property:

    <property name="eclipselink.target-database" value="MaxDB"/>

    Forward mapping with EclipseLink assumes that MaxDB is configured for unicode (in version 7.7, this is the default). Unicode mode also needs to be specified in the URL as follows:

    jdbc:sapdb://localhost/E32?unicode=yes

    Tested with:

    • DB: MaxDB, kernel 7.8.01 build 004-123-218-928
    • JDBC driver: MaxDB JDBC Driver, SAP AG, 7.6.06 Build 006-000-009-234 (Make-Version: 7.8.01 Build 003-123-215-703)
    Limitations:
    • The platform class must not be used with XA transactions - see bug 329773.
    • SetQueryTimeout or the hint "jakarta.persistence.query.timeout" do not work on MaxDB - see bug 326503.
    • The hint "jakarta.persistence.lock.timeout" has no effect with a positive value; a value of 0 is translated to NOWAIT.
    • The maximum width of an index is 1024 bytes on MaxDB. This also limits the size of a primary key. Moreover the primary key of join tables must not exceed this limit either. As it is composed of the primary key of the two tables that are joined, the combined width of the PKs of these two tables must not exceed this limit. See bug bug 326968.
    • VARCHAR [UNICODE] columns do not preserve trailing spaces - see bug 327435.
    • VARCHAR BYTE columns do not preserve trailing 0 bytes.
    • The hint "jakarta.persistence.lock.timeout=0" (NOWAIT) has no effect when atempting to pessimistically lock an entity with inheritance type JOINED - see bug 326799.
    • Pessimistic locking with lock scope EXTENDED should be used cautiously in the presence of foreign key constraints - see bug 327472.

    See Also:
    Serialized Form
    Author:
    Markus KARG (markus at headcrashing.eu), afischbach, agoerler, Sabine Heider (sabine.heider at sap.com), Konstantin Schwed (konstantin.schwed at sap.com)

    • Field Summary

      • Fields inherited from class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

        batchWritingMechanism, castSizeForVarcharParameter, classTypes, cursorCode, DEFAULT_MAX_BATCH_WRITING_SIZE, DEFAULT_PARAMETERIZED_MAX_BATCH_WRITING_SIZE, driverName, driverSupportsNationalCharacterVarying, fieldTypes, IS_VALID_TIMEOUT, isCastRequired, maxBatchWritingSize, partitioningCallback, pingSQL, printInnerJoinInWhereClause, printOuterJoinInWhereClause, shouldBindAllParameters, shouldBindLiterals, shouldBindPartialParameters, shouldCacheAllStatements, shouldCreateIndicesOnForeignKeys, shouldForceBindAllParameters, shouldForceFieldNamesToUpperCase, shouldIgnoreCaseOnFieldComparisons, shouldOptimizeDataConversion, shouldTrimStrings, statementCacheSize, storedProcedureTerminationToken, stringBindingSize, structConverters, supportsAutoCommit, tableCreationSuffix, transactionIsolation, typeConverters, useJDBCStoredProcedureSyntax, useNationalCharacterVarying, useRownumFiltering, usesBatchWriting, usesByteArrayBinding, usesJDBCBatchWriting, usesNativeBatchWriting, usesNativeSQL, usesStreamsForBinding, usesStringBinding

      • Fields inherited from class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

        conversionManager, dataTypesConvertedFromAClass, dataTypesConvertedToAClass, defaultNativeSequenceToTable, defaultSeqenceAtNextValue, defaultSequence, endDelimiter, platformOperators, sequences, sequencesLock, startDelimiter, supportsReturnGeneratedKeys, tableQualifier, timestampQuery, uuidQuery

    • Constructor Summary

      Constructors 
      Constructor Description
      MaxDBPlatform()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected Hashtable<Class<?>,​org.eclipse.persistence.internal.databaseaccess.FieldTypeDefinition> buildFieldTypes()
      Return the mapping of class types to database types for the schema framework.
      ValueReadQuery buildSelectQueryForSequenceObject​(String sequenceName, Integer size)
      INTERNAL: Returns query used to read value generated by sequence object (like Oracle sequence).
      boolean canBatchWriteWithOptimisticLocking​(org.eclipse.persistence.internal.databaseaccess.DatabaseCall call)
      INTERNAL: Supports Batch Writing with Optimistic Locking.
      protected String getCreateTempTableSqlPrefix()
      INTERNAL: Override this method if the platform supports temporary tables.
      int getMaxFieldNameSize()
      INTERNAL: returns the maximum number of characters that can be used in a field name on this platform.
      String getSelectForUpdateNoWaitString()
      This syntax does no wait on the lock.
      String getSelectForUpdateString()
      Most database support a syntax.
      org.eclipse.persistence.internal.helper.DatabaseTable getTempTableForTable​(org.eclipse.persistence.internal.helper.DatabaseTable table)
      INTERNAL: May override this method if the platform support temporary tables.
      protected void initializePlatformOperators()
      Initialize any platform-specific operators
      boolean isForUpdateCompatibleWithDistinct()
      INTERNAL: Indicates whether SELECT DISTINCT ...
      boolean isMaxDB()  
      protected void printFieldTypeSize​(Writer writer, FieldDefinition field, org.eclipse.persistence.internal.databaseaccess.FieldTypeDefinition fieldType)  
      boolean shouldAlwaysUseTempStorageForModifyAll()
      INTERNAL: That method affects UpdateAllQuery and DeleteAllQuery execution.
      boolean shouldBindLiterals()
      PUBLIC: Allows platform to choose whether to bind literals in DatabaseCalls or not.
      boolean shouldOptimizeDataConversion()
      Return if our driver level data conversion optimization is enabled.
      boolean shouldPrintOuterJoinInWhereClause()
      Some database require outer joins to be given in the where clause, others require it in the from clause.
      boolean shouldUseJDBCOuterJoinSyntax()
      JDBC defines and outer join syntax, many drivers do not support this.
      boolean supportsIndividualTableLocking()
      INTERNAL: Indicates whether locking clause could be selectively applied only to some tables in a ReadQuery.
      boolean supportsLocalTempTables()
      INTERNAL: Indicates whether the platform supports local temporary tables.
      boolean supportsNativeSequenceNumbers()  
      boolean supportsSequenceObjects()
      INTERNAL: Indicates whether the platform supports sequence objects.
      boolean supportsStoredFunctions()  

      • Methods inherited from class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

        addBatch, addStructConverter, allowBindingForSelectClause, allowsSizeInProcedureArguments, appendBoolean, appendByteArray, appendCalendar, appendDate, appendLiteralToCall, appendLiteralToCallWithBinding, appendNumber, appendParameter, appendParameterInternal, appendString, appendTime, appendTimestamp, autoCommit, beginTransaction, buildBatchCriteria, buildBatchCriteriaForComplexId, buildCallWithReturning, buildClassTypes, buildCreateIndex, buildCreateIndex, buildDropIndex, buildDropIndex, buildProcedureCallString, buildSequenceObjectAlterIncrementWriter, buildSequenceObjectCreationWriter, buildSequenceObjectDeletionWriter, canBuildCallWithReturning, checkTableExists, commitTransaction, computeMaxRowsForSQL, convertToDatabaseType, copyInto, createArray, createArray, createPlatformDefaultSequence, createStruct, createStruct, createStruct, dontBindUpdateAllQueryUsingTempTables, executeBatch, executeStoredProcedure, freeTemporaryObject, getAssignmentString, getBatchBeginString, getBatchDelimiterString, getBatchEndString, getBatchRowCountAssignString, getBatchRowCountDeclareString, getBatchRowCountReturnString, getBatchWritingMechanism, getCastSizeForVarcharParameter, getClassTypes, getConnection, getConnectionUserName, getConstraintDeletionString, getCreateDatabaseSchemaString, getCreateTempTableSqlBodyForTable, getCreateTempTableSqlSuffix, getCreateViewString, getCreationInOutputProcedureToken, getCreationOutputProcedureToken, getCursorCode, getCustomModifyValueForCall, getDefaultSequenceTableName, getDriverSupportsNVarChar, getDropCascadeString, getDropDatabaseSchemaString, getFieldTypeDefinition, getFieldTypes, getFunctionCallHeader, getIndexNamePrefix, getInOutputProcedureToken, getInputProcedureToken, getJDBCOuterJoinString, getJDBCType, getJDBCType, getJDBCTypeForSetNull, getJdbcTypeName, getJsonPlatform, getMaxBatchWritingSize, getMaxForeignKeyNameSize, getMaxIndexNameSize, getMaxUniqueKeyNameSize, getNoWaitString, getObjectFromResultSet, getOutputProcedureToken, getParameterValueFromDatabaseCall, getParameterValueFromDatabaseCall, getPartitioningCallback, getPingSQL, getProcedureArgument, getProcedureArgumentString, getProcedureAsString, getProcedureBeginString, getProcedureCallHeader, getProcedureCallTail, getProcedureEndString, getProcedureOptionList, getQualifiedName, getQualifiedSequenceTableName, getRefValue, getRefValue, getSelectForUpdateOfString, getSelectForUpdateWaitString, getSequenceCounterFieldName, getSequenceNameFieldName, getSequencePreallocationSize, getSequenceTableName, getStatementCacheSize, getStoredProcedureParameterPrefix, getStoredProcedureTerminationToken, getStringBindingSize, getStructConverters, getTableCreationSuffix, getTableExistsQuery, getTransactionIsolation, getTypeConverters, getUniqueConstraintDeletionString, getUseNationalCharacterVaryingTypeForString, getVPDClearIdentifierQuery, getVPDCreationFunctionString, getVPDCreationPolicyString, getVPDDeletionString, getVPDSetIdentifierQuery, hasPartitioningCallback, initialize, initializeConnectionData, isAlterSequenceObjectSupported, isCastRequired, isDynamicSQLRequiredForFunctions, isInformixOuterJoin, isJDBCExecuteCompliant, isLobCompatibleWithDistinct, isLockTimeoutException, isNullAllowedInSelectClause, isOutputAllowWithResultSet, isRowCountOutputParameterRequired, isXDBDocument, maximumNumericValues, minimumNumericValues, minimumTimeIncrement, prepareBatchStatement, printFieldIdentityClause, printFieldNotNullClause, printFieldNullClause, printFieldTypeSize, printFieldUnique, printFieldUnique, printSQLSelectStatement, printStoredFunctionReturnKeyWord, printValuelist, printValuelist, registerOutputParameter, registerOutputParameter, registerOutputParameter, registerOutputParameter, requiresNamedPrimaryKeyConstraints, requiresProcedureBrackets, requiresProcedureCallBrackets, requiresProcedureCallOuputToken, requiresTableInIndexDropDDL, requiresTypeNameToRegisterOutputParameter, requiresUniqueConstraintCreationOnTableCreate, retrieveFirstPrimaryKeyOrOne, rollbackTransaction, setBatchWritingMechanism, setCastSizeForVarcharParameter, setClassTypes, setCursorCode, setDriverName, setDriverSupportsNVarChar, setFieldTypes, setIsCastRequired, setMaxBatchWritingSize, setNullFromDatabaseField, setNullFromDatabaseField, setParameterValueInDatabaseCall, setParameterValueInDatabaseCall, setPartitioningCallback, setPingSQL, setPrintInnerJoinInWhereClause, setPrintOuterJoinInWhereClause, setSequenceCounterFieldName, setSequenceNameFieldName, setSequenceTableName, setShouldBindAllParameters, setShouldBindLiterals, setShouldBindPartialParameters, setShouldCacheAllStatements, setShouldCreateIndicesOnForeignKeys, setShouldForceBindAllParameters, setShouldForceFieldNamesToUpperCase, setShouldIgnoreCaseOnFieldComparisons, setShouldOptimizeDataConversion, setShouldTrimStrings, setShouldUseRownumFiltering, setStatementCacheSize, setStoredProcedureTerminationToken, setStringBindingSize, setSupportsAutoCommit, setTableCreationSuffix, setTransactionIsolation, setUseJDBCStoredProcedureSyntax, setUseNationalCharacterVaryingTypeForString, setUsesBatchWriting, setUsesByteArrayBinding, setUsesJDBCBatchWriting, setUsesNativeBatchWriting, setUsesNativeSQL, setUsesStreamsForBinding, setUsesStringBinding, shouldBindAllParameters, shouldBindPartialParameters, shouldCacheAllStatements, shouldCreateIndicesForPrimaryKeys, shouldCreateIndicesOnForeignKeys, shouldCreateIndicesOnUniqueKeys, shouldForceBindAllParameters, shouldForceFieldNamesToUpperCase, shouldIgnoreCaseOnFieldComparisons, shouldIgnoreException, shouldPrintAliasForUpdate, shouldPrintConstraintNameAfter, shouldPrintFieldIdentityClause, shouldPrintForUpdateClause, shouldPrintInnerJoinInWhereClause, shouldPrintInOutputTokenBeforeType, shouldPrintInputTokenAtStart, shouldPrintLockingClauseAfterWhereClause, shouldPrintOutputTokenAtStart, shouldPrintOutputTokenBeforeType, shouldPrintStoredProcedureArgumentNameInCall, shouldPrintStoredProcedureVariablesAfterBeginString, shouldTempTableSpecifyPrimaryKeys, shouldTrimStrings, shouldUseCustomModifyForCall, shouldUseGetSetNString, shouldUseRownumFiltering, supportsANSIInnerJoinSyntax, supportsAutoCommit, supportsAutoConversionToNumericForArithmeticOperations, supportsConnectionUserName, supportsCountDistinctWithMultipleFields, supportsDeleteOnCascade, supportsForeignKeyConstraints, supportsGlobalTempTables, supportsIndexes, supportsLockingQueriesWithMultipleTables, supportsNestingOuterJoins, supportsOrderByParameters, supportsOuterJoinsWithBrackets, supportsPrimaryKeyConstraint, supportsTempTables, supportsUniqueColumns, supportsUniqueKeyConstraints, supportsVPD, supportsWaitForUpdate, usesBatchWriting, usesByteArrayBinding, usesJDBCBatchWriting, usesNativeBatchWriting, usesNativeSQL, usesSequenceTable, usesStreamsForBinding, usesStringBinding, wasFailureCommunicationBased, writeAddColumnClause, writeAutoAssignmentSetClause, writeAutoJoinWhereClause, writeCleanUpTempTableSql, writeCreateTempTableSql, writeDeleteFromTargetTableUsingTempTableSql, writeFields, writeFieldsAutoClause, writeFieldsList, writeInsertIntoTableSql, writeJoinWhereClause, writeLOB, writeParameterMarker, writeTableCreationSuffix, writeUpdateOriginalFromTempTableSql

      • Methods inherited from class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

        addOperator, addSequence, addSequence, buildNativeCall, buildSelectQueryForIdentity, buildSelectQueryForIdentity, buildSelectQueryForSequenceObject, clone, convertObject, createConnectionCustomizer, createExpressionFor, getConversionManager, getDataTypesConvertedFrom, getDataTypesConvertedTo, getDefaultNativeSequenceToTable, getDefaultSeqenceAtNextValue, getDefaultSequence, getDefaultSequenceToWrite, getDriverVersion, getEndDelimiter, getINClauseLimit, getOperator, getPlatformOperators, getSelectSequenceQuery, getSequence, getSequences, getSequencesToWrite, getStartDelimiter, getTableQualifier, getTimestampFromServer, getTimestampQuery, getUpdateSequenceQuery, getUUIDQuery, hasDefaultSequence, initializeDefaultQueries, initIdentitySequences, isAccess, isAttunity, isCloudscape, isDB2, isDB2Z, isDBase, isDerby, isFirebird, isH2, isHANA, isHSQL, isInformix, isMariaDB, isMySQL, isODBC, isOracle, isOracle12, isOracle23, isOracle9, isPervasive, isPointBase, isPostgreSQL, isSQLAnywhere, isSQLServer, isSybase, isSymfoware, isTimesTen, isTimesTen7, removeAllSequences, removeIdentitySequences, removeSequence, sequencesAfterCloneCleanup, setConversionManager, setDefaultNativeSequenceToTable, setDefaultSeqenceAtNextValue, setDefaultSequence, setEndDelimiter, setSelectSequenceNumberQuery, setSequencePreallocationSize, setSequences, setStartDelimiter, setSupportsReturnGeneratedKeys, setTableQualifier, setTimestampQuery, setUpdateSequenceQuery, setUUIDQuery, shouldNativeSequenceUseTransaction, shouldPrepare, shouldSelectDistinctIncludeOrderBy, shouldSelectIncludeOrderBy, supportsIdentity, supportsReturnGeneratedKeys, toString, usesPlatformDefaultSequence

      • Methods inherited from interface org.eclipse.persistence.internal.databaseaccess.Platform

        connectionProperties

    • Constructor Detail

      • MaxDBPlatform

        public MaxDBPlatform()

    • Method Detail

      • isForUpdateCompatibleWithDistinct

        public boolean isForUpdateCompatibleWithDistinct()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        INTERNAL: Indicates whether SELECT DISTINCT ... FOR UPDATE is allowed by the platform (Oracle doesn't allow this).
        Overrides:
        isForUpdateCompatibleWithDistinct in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • getSelectForUpdateString

        public String getSelectForUpdateString()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        Most database support a syntax. although don't actually lock the row. Some require the OF some don't like it.
        Overrides:
        getSelectForUpdateString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • getSelectForUpdateNoWaitString

        public String getSelectForUpdateNoWaitString()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        This syntax does no wait on the lock. (i.e. In Oracle adding FOR UPDATE NOWAIT to the end will accomplish this)
        Overrides:
        getSelectForUpdateNoWaitString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • buildFieldTypes

        protected Hashtable<Class<?>,​org.eclipse.persistence.internal.databaseaccess.FieldTypeDefinition> buildFieldTypes()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        Return the mapping of class types to database types for the schema framework.
        Overrides:
        buildFieldTypes in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • supportsIndividualTableLocking

        public boolean supportsIndividualTableLocking()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        INTERNAL: Indicates whether locking clause could be selectively applied only to some tables in a ReadQuery. Example: the following locks the rows in SALARY table, doesn't lock the rows in EMPLOYEE table: on Oracle platform (method returns true): SELECT t0.EMP_ID..., t1.SALARY FROM EMPLOYEE t0, SALARY t1 WHERE ... FOR UPDATE t1.SALARY on SQLServer platform (method returns true): SELECT t0.EMP_ID..., t1.SALARY FROM EMPLOYEE t0, SALARY t1 WITH (UPDLOCK) WHERE ...
        Overrides:
        supportsIndividualTableLocking in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • printFieldTypeSize

        protected void printFieldTypeSize​(Writer writer,
                                  FieldDefinition field,
                                  org.eclipse.persistence.internal.databaseaccess.FieldTypeDefinition fieldType)
                           throws IOException
        Overrides:
        printFieldTypeSize in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        Throws:
        IOException

      • initializePlatformOperators

        protected void initializePlatformOperators()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
        Initialize any platform-specific operators
        Overrides:
        initializePlatformOperators in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

      • shouldOptimizeDataConversion

        public boolean shouldOptimizeDataConversion()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        Return if our driver level data conversion optimization is enabled. This can be disabled as some drivers perform data conversion themselves incorrectly.
        Overrides:
        shouldOptimizeDataConversion in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • supportsNativeSequenceNumbers

        public boolean supportsNativeSequenceNumbers()
        Overrides:
        supportsNativeSequenceNumbers in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

      • buildSelectQueryForSequenceObject

        public ValueReadQuery buildSelectQueryForSequenceObject​(String sequenceName,
                                                        Integer size)
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
        INTERNAL: Returns query used to read value generated by sequence object (like Oracle sequence). In case the other version of this method (taking no parameters) returns null, this method is called every time sequence object NativeSequence reads. If the platform supportsSequenceObjects then (at least) one of buildSelectQueryForSequenceObject methods should return non-null query.
        Overrides:
        buildSelectQueryForSequenceObject in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

      • getCreateTempTableSqlPrefix

        protected String getCreateTempTableSqlPrefix()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        INTERNAL: Override this method if the platform supports temporary tables. This should contain the beginning of sql string for creating temporary table - the sql statement name, for instance: "CREATE GLOBAL TEMPORARY TABLE ". Don't forget to end it with a space.
        Overrides:
        getCreateTempTableSqlPrefix in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • getMaxFieldNameSize

        public int getMaxFieldNameSize()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        INTERNAL: returns the maximum number of characters that can be used in a field name on this platform.
        Overrides:
        getMaxFieldNameSize in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • supportsLocalTempTables

        public boolean supportsLocalTempTables()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        INTERNAL: Indicates whether the platform supports local temporary tables. "Local" means that several threads may create temporary tables with the same name. Local temporary table is created in the beginning of UpdateAllQuery execution and dropped in the end of it. Override this method if the platform supports local temporary tables.
        Overrides:
        supportsLocalTempTables in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • getTempTableForTable

        public org.eclipse.persistence.internal.helper.DatabaseTable getTempTableForTable​(org.eclipse.persistence.internal.helper.DatabaseTable table)
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        INTERNAL: May override this method if the platform support temporary tables.
        Overrides:
        getTempTableForTable in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        Parameters:
        table - is original table for which temp table is created.
        Returns:
        temporary table

      • isMaxDB

        public boolean isMaxDB()
        Specified by:
        isMaxDB in interface org.eclipse.persistence.internal.databaseaccess.Platform
        Overrides:
        isMaxDB in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

      • shouldAlwaysUseTempStorageForModifyAll

        public boolean shouldAlwaysUseTempStorageForModifyAll()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        INTERNAL: That method affects UpdateAllQuery and DeleteAllQuery execution. In case it returns false modify all queries would attempt to proceed without using temporary storage if it is possible. In case it returns true modify all queries would use temporary storage unless each modify statement doesn't reference any other tables. May need to override this method if the platform can't handle the sql generated for modify all queries without using temporary storage.
        Overrides:
        shouldAlwaysUseTempStorageForModifyAll in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • shouldBindLiterals

        public boolean shouldBindLiterals()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        PUBLIC: Allows platform to choose whether to bind literals in DatabaseCalls or not.
        Overrides:
        shouldBindLiterals in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • shouldPrintOuterJoinInWhereClause

        public boolean shouldPrintOuterJoinInWhereClause()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        Some database require outer joins to be given in the where clause, others require it in the from clause.
        Overrides:
        shouldPrintOuterJoinInWhereClause in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • shouldUseJDBCOuterJoinSyntax

        public boolean shouldUseJDBCOuterJoinSyntax()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        JDBC defines and outer join syntax, many drivers do not support this. So we normally avoid it.
        Overrides:
        shouldUseJDBCOuterJoinSyntax in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • supportsSequenceObjects

        public boolean supportsSequenceObjects()
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
        INTERNAL: Indicates whether the platform supports sequence objects. This method is to be used *ONLY* by sequencing classes
        Overrides:
        supportsSequenceObjects in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

      • supportsStoredFunctions

        public boolean supportsStoredFunctions()
        Overrides:
        supportsStoredFunctions in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

      • canBatchWriteWithOptimisticLocking

        public boolean canBatchWriteWithOptimisticLocking​(org.eclipse.persistence.internal.databaseaccess.DatabaseCall call)
        Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
        INTERNAL: Supports Batch Writing with Optimistic Locking.
        Overrides:
        canBatchWriteWithOptimisticLocking in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform