Package org.eclipse.persistence.platform.database

Class MySQLPlatform

java.lang.Object
org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
org.eclipse.persistence.platform.database.DatabasePlatform
org.eclipse.persistence.platform.database.MySQLPlatform
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 class MySQLPlatform extends DatabasePlatform

Purpose: Provides MySQL specific behavior.

Responsibilities:

  • Native SQL for Date, Time, & Timestamp.
  • Native sequencing.
  • Mapping of class types to database types for the schema framework.
  • Pessimistic locking.
  • Platform specific operators.
See Also:

  • Field Summary

    Fields inherited from class org.eclipse.persistence.platform.database.DatabasePlatform

    DEFAULT_VARCHAR_SIZE

    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

  • Constructor Summary

    Constructors
    Constructor
    Description
    MySQLPlatform()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    protected void
    appendCalendar(Calendar calendar, Writer writer)
    Appends an MySQL specific Timestamp, if usesNativeSQL is true otherwise use the ODBC format.
    protected void
    appendDate(Date date, Writer writer)
    Appends an MySQL specific date if usesNativeSQL is true otherwise use the ODBC format.
    protected void
    appendTime(Time time, Writer writer)
    Appends an MySQL specific time if usesNativeSQL is true otherwise use the ODBC format.
    protected void
    appendTimestamp(Timestamp timestamp, Writer writer)
    Appends an MySQL specific Timestamp, if usesNativeSQL is true otherwise use the ODBC format.
    protected Hashtable
    buildFieldTypes()
    Return the mapping of class types to database types for the schema framework.
    String
    buildProcedureCallString(StoredProcedureCall call, org.eclipse.persistence.internal.sessions.AbstractSession session, org.eclipse.persistence.internal.sessions.AbstractRecord row)
    Return the stored procedure syntax for this platform.
    ValueReadQuery
    buildSelectQueryForIdentity()
    INTERNAL: Build the identity query for native sequencing.
    boolean
    canBatchWriteWithOptimisticLocking(org.eclipse.persistence.internal.databaseaccess.DatabaseCall call)
    INTERNAL: Supports Batch Writing with Optimistic Locking.
    boolean
    checkTableExists(org.eclipse.persistence.internal.sessions.DatabaseSessionImpl session, TableDefinition table, boolean suppressLogging)
    INTERNAL: Executes and evaluates query to check whether given table exists.
    int
    computeMaxRowsForSQL(int firstResultIndex, int maxResults)
    INTERNAL: Use the JDBC maxResults and firstResultIndex setting to compute a value to use when limiting the results of a query in SQL.
    protected ExpressionOperator
    currentDateOperator()
    INTERNAL: Create the current date operator for this platform.
    protected ExpressionOperator
    dateToStringOperator()
    INTERNAL: Build MySQL equivalent to TO_CHAR.
    String
    getConstraintDeletionString()
    INTERNAL: Used for constraint deletion.
    protected String
    getCreateTempTableSqlPrefix()
    INTERNAL: MySQL temp table syntax, used for update-all, delete-all queries.
    String
    getDropDatabaseSchemaString(String schema)
    Return the drop schema definition.
    String
    getFunctionCallHeader()
    Used for stored function calls.
    String
    getInOutputProcedureToken()
    INTERNAL: MySQL uses the INOUT keyword for this.
    int
    getJDBCType(Class javaType)
    Return the JDBC type for the Java type.
    String
    getProcedureAsString()
    MySQL does not use the AS token.
    String
    getProcedureBeginString()
    INTERNAL: MySQL requires BEGIN.
    String
    getProcedureCallHeader()
    INTERNAL: Used for stored procedure calls.
    String
    getProcedureCallTail()
    Used for sp calls.
    String
    getProcedureEndString()
    INTERNAL: MySQL requires END.
    String
    getSelectForUpdateString()
    INTERNAL: Used for pessimistic locking.
    protected DataReadQuery
    getTableExistsQuery(TableDefinition table)
    INTERNAL: Returns query to check whether given table exists.
    ValueReadQuery
    getTimestampQuery()
    INTERNAL: This method returns the query to select the timestamp from the server for MySQL.
    String
    getUniqueConstraintDeletionString()
    INTERNAL: Used for unique constraint deletion.
    void
    initializeConnectionData(Connection connection)
    INTERNAL: Allow initialization from the connection.
    protected void
    initializePlatformOperators()
    Initialize any platform-specific operators.
    boolean
    isForUpdateCompatibleWithDistinct()
    INTERNAL: Indicates whether SELECT DISTINCT ...
    boolean
    isFractionalTimeSupported()
     
    boolean
    isMySQL()
    Answers whether platform is MySQL.
    protected ExpressionOperator
    leftTrim2()
    INTERNAL: Build MySQL equivalent to LTRIM(string_exp, character).
    protected ExpressionOperator
    logOperator()
    INTERNAL: Create the 10 based log operator for this platform.
    void
    printFieldIdentityClause(Writer writer)
    INTERNAL: Append the receiver's field 'identity' constraint clause to a writer.
    void
    printSQLSelectStatement(org.eclipse.persistence.internal.databaseaccess.DatabaseCall call, org.eclipse.persistence.internal.expressions.ExpressionSQLPrinter printer, org.eclipse.persistence.internal.expressions.SQLSelectStatement statement)
    INTERNAL: Print the SQL representation of the statement on a stream, storing the fields in the DatabaseCall.
    void
    printStoredFunctionReturnKeyWord(Writer writer)
    INTERNAL: Prints return keyword for StoredFunctionDefinition: CREATE FUNCTION StoredFunction_In (P_IN BIGINT) RETURN BIGINT The method was introduced because MySQL requires "RETURNS" instead: CREATE FUNCTION StoredFunction_In (P_IN BIGINT) RETURNS BIGINT
    boolean
    requiresProcedureBrackets()
    Used for stored procedure creation: MySQL platforms need brackets around arguments declaration even if no arguments exist.
    boolean
    requiresTableInIndexDropDDL()
    INTERNAL: Return if this database requires the table name when dropping an index.
    protected ExpressionOperator
    rightTrim2()
    INTERNAL: Build MySQL equivalent to RTRIM(string_exp, character).
    boolean
    shouldAlwaysUseTempStorageForModifyAll()
    INTERNAL: MySQL supports temp tables for update-all, delete-all queries.
    boolean
    shouldPrintForUpdateClause()
    INTERNAL: MySQL FOR UPDATE clause has to be the last
    boolean
    shouldPrintOutputTokenAtStart()
    INTERNAL: MySQL requires the direction at the start of the argument.
    boolean
    shouldPrintStoredProcedureArgumentNameInCall()
    INTERNAL: MySQL stored procedure calls do not require the argument name be printed in the call string e.g.
    boolean
    shouldUseJDBCOuterJoinSyntax()
    INTERNAL: JDBC defines an outer join syntax which many drivers do not support.
    boolean
    supportsAutoConversionToNumericForArithmeticOperations()
    Some db allow VARCHAR db field to be used in arithmetic operations automatically converting them to numeric: UPDATE OL_PHONE SET PHONE_ORDER_VARCHAR = (PHONE_ORDER_VARCHAR + 1) WHERE ...
    boolean
    supportsCountDistinctWithMultipleFields()
    INTERNAL: Indicates whether the platform supports the count distinct function with multiple fields.
    boolean
    supportsGlobalTempTables()
    INTERNAL: MySQL supports temp tables for update-all, delete-all queries.
    boolean
    supportsIdentity()
    INTERNAL: Indicates whether the platform supports identity.
    boolean
    supportsIndividualTableLocking()
    INTERNAL: Indicates whether locking clause could be selectively applied only to some tables in a ReadQuery.
    boolean
    supportsStoredFunctions()
     
    protected ExpressionOperator
    toCharOperator()
    INTERNAL: Build MySQL equivalent to TO_CHAR.
    protected ExpressionOperator
    toDateOperator()
    INTERNAL: Build MySQL equivalent to TO_DATE.
    protected ExpressionOperator
    toNumberOperator()
    INTERNAL: Build MySQL equivalent to TO_NUMBER.
    void
    writeDeleteFromTargetTableUsingTempTableSql(Writer writer, org.eclipse.persistence.internal.helper.DatabaseTable table, org.eclipse.persistence.internal.helper.DatabaseTable targetTable, Collection pkFields, Collection targetPkFields, org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform platform)
    INTERNAL: Writes MySQL specific SQL for accessing temp tables for delete-all queries.
    void
    writeUpdateOriginalFromTempTableSql(Writer writer, org.eclipse.persistence.internal.helper.DatabaseTable table, Collection pkFields, Collection assignedFields)
    INTERNAL: Writes MySQL specific SQL for accessing temp tables for update-all queries.

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

    addBatch, addStructConverter, allowBindingForSelectClause, allowsSizeInProcedureArguments, appendBoolean, appendByteArray, appendLiteralToCall, appendLiteralToCallWithBinding, appendNumber, appendParameter, appendParameterInternal, appendString, autoCommit, beginTransaction, buildBatchCriteria, buildBatchCriteriaForComplexId, buildCallWithReturning, buildClassTypes, buildCreateIndex, buildCreateIndex, buildDropIndex, buildDropIndex, buildSequenceObjectAlterIncrementWriter, buildSequenceObjectCreationWriter, buildSequenceObjectDeletionWriter, canBuildCallWithReturning, commitTransaction, convertToDatabaseType, copyInto, createArray, createArray, createPlatformDefaultSequence, createStruct, createStruct, createStruct, dontBindUpdateAllQueryUsingTempTables, executeBatch, executeStoredProcedure, freeTemporaryObject, getAssignmentString, getBatchBeginString, getBatchDelimiterString, getBatchEndString, getBatchRowCountAssignString, getBatchRowCountDeclareString, getBatchRowCountReturnString, getBatchWritingMechanism, getCastSizeForVarcharParameter, getClassTypes, getConnection, getConnectionUserName, getCreateDatabaseSchemaString, getCreateTempTableSqlBodyForTable, getCreateTempTableSqlSuffix, getCreateViewString, getCreationInOutputProcedureToken, getCreationOutputProcedureToken, getCursorCode, getCustomModifyValueForCall, getDefaultSequenceTableName, getDriverSupportsNVarChar, getDropCascadeString, getFieldTypeDefinition, getFieldTypes, getIndexNamePrefix, getInputProcedureToken, getJDBCOuterJoinString, getJDBCType, getJDBCTypeForSetNull, getJdbcTypeName, getMaxBatchWritingSize, getMaxFieldNameSize, getMaxForeignKeyNameSize, getMaxIndexNameSize, getMaxUniqueKeyNameSize, getNoWaitString, getObjectFromResultSet, getOutputProcedureToken, getParameterValueFromDatabaseCall, getParameterValueFromDatabaseCall, getPartitioningCallback, getPingSQL, getProcedureArgument, getProcedureArgument, getProcedureArgumentString, getProcedureOptionList, getQualifiedName, getQualifiedSequenceTableName, getRefValue, getRefValue, getSelectForUpdateNoWaitString, getSelectForUpdateOfString, getSelectForUpdateWaitString, getSequenceCounterFieldName, getSequenceNameFieldName, getSequencePreallocationSize, getSequenceTableName, getStatementCacheSize, getStoredProcedureParameterPrefix, getStoredProcedureTerminationToken, getStringBindingSize, getStructConverters, getTableCreationSuffix, getTempTableForTable, getTransactionIsolation, getTypeConverters, getUseNationalCharacterVaryingTypeForString, getVPDClearIdentifierQuery, getVPDCreationFunctionString, getVPDCreationPolicyString, getVPDDeletionString, getVPDSetIdentifierQuery, hasPartitioningCallback, initialize, isAlterSequenceObjectSupported, isCastRequired, isDynamicSQLRequiredForFunctions, isInformixOuterJoin, isJDBCExecuteCompliant, isLobCompatibleWithDistinct, isLockTimeoutException, isNullAllowedInSelectClause, isOutputAllowWithResultSet, isRowCountOutputParameterRequired, isXDBDocument, maximumNumericValues, minimumNumericValues, minimumTimeIncrement, prepareBatchStatement, printFieldNotNullClause, printFieldNullClause, printFieldTypeSize, printFieldTypeSize, printFieldUnique, printFieldUnique, printValuelist, printValuelist, registerOutputParameter, registerOutputParameter, registerOutputParameter, registerOutputParameter, requiresNamedPrimaryKeyConstraints, requiresProcedureCallBrackets, requiresProcedureCallOuputToken, 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, shouldBindLiterals, shouldBindPartialParameters, shouldCacheAllStatements, shouldCreateIndicesForPrimaryKeys, shouldCreateIndicesOnForeignKeys, shouldCreateIndicesOnUniqueKeys, shouldForceBindAllParameters, shouldForceFieldNamesToUpperCase, shouldIgnoreCaseOnFieldComparisons, shouldIgnoreException, shouldOptimizeDataConversion, shouldPrintAliasForUpdate, shouldPrintConstraintNameAfter, shouldPrintFieldIdentityClause, shouldPrintInnerJoinInWhereClause, shouldPrintInOutputTokenBeforeType, shouldPrintInputTokenAtStart, shouldPrintLockingClauseAfterWhereClause, shouldPrintOuterJoinInWhereClause, shouldPrintOutputTokenBeforeType, shouldPrintStoredProcedureVariablesAfterBeginString, shouldTempTableSpecifyPrimaryKeys, shouldTrimStrings, shouldUseCustomModifyForCall, shouldUseGetSetNString, shouldUseRownumFiltering, supportsANSIInnerJoinSyntax, supportsAutoCommit, supportsConnectionUserName, supportsDeleteOnCascade, supportsForeignKeyConstraints, supportsIndexes, supportsLocalTempTables, supportsLockingQueriesWithMultipleTables, supportsNestingOuterJoins, supportsOrderByParameters, supportsOuterJoinsWithBrackets, supportsPrimaryKeyConstraint, supportsTempTables, supportsUniqueColumns, supportsUniqueKeyConstraints, supportsVPD, supportsWaitForUpdate, usesBatchWriting, usesByteArrayBinding, usesJDBCBatchWriting, usesNativeBatchWriting, usesNativeSQL, usesSequenceTable, usesStreamsForBinding, usesStringBinding, wasFailureCommunicationBased, writeAddColumnClause, writeAutoAssignmentSetClause, writeAutoJoinWhereClause, writeCleanUpTempTableSql, writeCreateTempTableSql, writeFields, writeFieldsAutoClause, writeFieldsList, writeInsertIntoTableSql, writeJoinWhereClause, writeLOB, writeParameterMarker, writeTableCreationSuffix

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

    addOperator, addSequence, addSequence, buildNativeCall, buildSelectQueryForIdentity, buildSelectQueryForSequenceObject, buildSelectQueryForSequenceObject, clone, convertObject, createConnectionCustomizer, createExpressionFor, getConversionManager, getDataTypesConvertedFrom, getDataTypesConvertedTo, getDefaultNativeSequenceToTable, getDefaultSeqenceAtNextValue, getDefaultSequence, getDefaultSequenceToWrite, getEndDelimiter, getINClauseLimit, getOperator, getPlatformOperators, getSelectSequenceQuery, getSequence, getSequences, getSequencesToWrite, getStartDelimiter, getTableQualifier, getTimestampFromServer, getUpdateSequenceQuery, hasDefaultSequence, initializeDefaultQueries, initIdentitySequences, isAccess, isAttunity, isCloudscape, isDB2, isDB2Z, isDBase, isDerby, isFirebird, isH2, isHANA, isHSQL, isInformix, isMaxDB, isODBC, isOracle, isOracle12, 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, shouldNativeSequenceUseTransaction, shouldPrepare, shouldSelectDistinctIncludeOrderBy, shouldSelectIncludeOrderBy, supportsNativeSequenceNumbers, supportsReturnGeneratedKeys, supportsSequenceObjects, toString, usesPlatformDefaultSequence

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • MySQLPlatform

      public MySQLPlatform()

  • Method Details

    • initializeConnectionData

      public void initializeConnectionData(Connection connection) throws SQLException
      Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      INTERNAL: Allow initialization from the connection.
      Overrides:
      initializeConnectionData in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Throws:
      SQLException

    • isFractionalTimeSupported

      public boolean isFractionalTimeSupported()

    • appendDate

      protected void appendDate(Date date, Writer writer) throws IOException
      Appends an MySQL specific date if usesNativeSQL is true otherwise use the ODBC format. Native FORMAT: 'YYYY-MM-DD'
      Overrides:
      appendDate in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Throws:
      IOException

    • appendTime

      protected void appendTime(Time time, Writer writer) throws IOException
      Appends an MySQL specific time if usesNativeSQL is true otherwise use the ODBC format. Native FORMAT: 'HH:MM:SS'.
      Overrides:
      appendTime in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Throws:
      IOException

    • appendTimestamp

      protected void appendTimestamp(Timestamp timestamp, Writer writer) throws IOException
      Appends an MySQL specific Timestamp, if usesNativeSQL is true otherwise use the ODBC format. Native Format: 'YYYY-MM-DD HH:MM:SS'
      Overrides:
      appendTimestamp in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Throws:
      IOException

    • appendCalendar

      protected void appendCalendar(Calendar calendar, Writer writer) throws IOException
      Appends an MySQL specific Timestamp, if usesNativeSQL is true otherwise use the ODBC format. Native Format: 'YYYY-MM-DD HH:MM:SS'
      Overrides:
      appendCalendar in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Throws:
      IOException

    • buildFieldTypes

      protected Hashtable buildFieldTypes()
      Return the mapping of class types to database types for the schema framework.
      Overrides:
      buildFieldTypes in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getJDBCType

      public int getJDBCType(Class javaType)
      Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Return the JDBC type for the Java type.
      Overrides:
      getJDBCType in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • buildSelectQueryForIdentity

      public ValueReadQuery buildSelectQueryForIdentity()
      INTERNAL: Build the identity query for native sequencing.
      Overrides:
      buildSelectQueryForIdentity in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

    • buildProcedureCallString

      public String buildProcedureCallString(StoredProcedureCall call, org.eclipse.persistence.internal.sessions.AbstractSession session, org.eclipse.persistence.internal.sessions.AbstractRecord row)
      Return the stored procedure syntax for this platform.
      Overrides:
      buildProcedureCallString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • computeMaxRowsForSQL

      public int computeMaxRowsForSQL(int firstResultIndex, int maxResults)
      INTERNAL: Use the JDBC maxResults and firstResultIndex setting to compute a value to use when limiting the results of a query in SQL. These limits tend to be used in two ways. 1. MaxRows is the index of the last row to be returned (like JDBC maxResults) 2. MaxRows is the number of rows to be returned MySQL uses case #2 and therefore the maxResults has to be altered based on the firstResultIndex
      Overrides:
      computeMaxRowsForSQL in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Parameters:
      firstResultIndex -
      maxResults -
      See Also:

    • canBatchWriteWithOptimisticLocking

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

    • getConstraintDeletionString

      public String getConstraintDeletionString()
      INTERNAL: Used for constraint deletion.
      Overrides:
      getConstraintDeletionString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getUniqueConstraintDeletionString

      public String getUniqueConstraintDeletionString()
      INTERNAL: Used for unique constraint deletion.
      Overrides:
      getUniqueConstraintDeletionString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getFunctionCallHeader

      public String getFunctionCallHeader()
      Used for stored function calls.
      Overrides:
      getFunctionCallHeader in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getProcedureCallTail

      public String getProcedureCallTail()
      Used for sp calls.
      Overrides:
      getProcedureCallTail in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getSelectForUpdateString

      public String getSelectForUpdateString()
      INTERNAL: Used for pessimistic locking.
      Overrides:
      getSelectForUpdateString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • 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

    • getTimestampQuery

      public ValueReadQuery getTimestampQuery()
      INTERNAL: This method returns the query to select the timestamp from the server for MySQL.
      Specified by:
      getTimestampQuery in interface org.eclipse.persistence.internal.databaseaccess.Platform
      Overrides:
      getTimestampQuery in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

    • isMySQL

      public boolean isMySQL()
      Answers whether platform is MySQL.
      Specified by:
      isMySQL in interface org.eclipse.persistence.internal.databaseaccess.Platform
      Overrides:
      isMySQL in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

    • initializePlatformOperators

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

    • logOperator

      protected ExpressionOperator logOperator()
      INTERNAL: Create the 10 based log operator for this platform.

    • toNumberOperator

      protected ExpressionOperator toNumberOperator()
      INTERNAL: Build MySQL equivalent to TO_NUMBER.

    • toDateOperator

      protected ExpressionOperator toDateOperator()
      INTERNAL: Build MySQL equivalent to TO_DATE.

    • toCharOperator

      protected ExpressionOperator toCharOperator()
      INTERNAL: Build MySQL equivalent to TO_CHAR.

    • dateToStringOperator

      protected ExpressionOperator dateToStringOperator()
      INTERNAL: Build MySQL equivalent to TO_CHAR.

    • leftTrim2

      protected ExpressionOperator leftTrim2()
      INTERNAL: Build MySQL equivalent to LTRIM(string_exp, character). MySQL: TRIM(LEADING character FROM string_exp)

    • rightTrim2

      protected ExpressionOperator rightTrim2()
      INTERNAL: Build MySQL equivalent to RTRIM(string_exp, character). MySQL: TRIM(TRAILING character FROM string_exp)

    • currentDateOperator

      protected ExpressionOperator currentDateOperator()
      INTERNAL: Create the current date operator for this platform.

    • printFieldIdentityClause

      public void printFieldIdentityClause(Writer writer) throws ValidationException
      INTERNAL: Append the receiver's field 'identity' constraint clause to a writer.
      Overrides:
      printFieldIdentityClause in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Throws:
      ValidationException

    • shouldUseJDBCOuterJoinSyntax

      public boolean shouldUseJDBCOuterJoinSyntax()
      INTERNAL: JDBC defines an outer join syntax which many drivers do not support. So we normally avoid it.
      Overrides:
      shouldUseJDBCOuterJoinSyntax in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • supportsIdentity

      public boolean supportsIdentity()
      INTERNAL: Indicates whether the platform supports identity. MySQL supports native sequencing through AUTO_INCREMENT field types.
      Overrides:
      supportsIdentity in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

    • supportsCountDistinctWithMultipleFields

      public boolean supportsCountDistinctWithMultipleFields()
      INTERNAL: Indicates whether the platform supports the count distinct function with multiple fields.
      Overrides:
      supportsCountDistinctWithMultipleFields in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • requiresTableInIndexDropDDL

      public boolean requiresTableInIndexDropDDL()
      INTERNAL: Return if this database requires the table name when dropping an index.
      Overrides:
      requiresTableInIndexDropDDL in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • supportsGlobalTempTables

      public boolean supportsGlobalTempTables()
      INTERNAL: MySQL supports temp tables for update-all, delete-all queries.
      Overrides:
      supportsGlobalTempTables in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • supportsIndividualTableLocking

      public boolean supportsIndividualTableLocking()
      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

    • supportsStoredFunctions

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

    • supportsAutoConversionToNumericForArithmeticOperations

      public boolean supportsAutoConversionToNumericForArithmeticOperations()
      Some db allow VARCHAR db field to be used in arithmetic operations automatically converting them to numeric: UPDATE OL_PHONE SET PHONE_ORDER_VARCHAR = (PHONE_ORDER_VARCHAR + 1) WHERE ... SELECT ... WHERE ... t0.MANAGED_ORDER_VARCHAR BETWEEN 1 AND 4 ...
      Overrides:
      supportsAutoConversionToNumericForArithmeticOperations in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getCreateTempTableSqlPrefix

      protected String getCreateTempTableSqlPrefix()
      INTERNAL: MySQL temp table syntax, used for update-all, delete-all queries.
      Overrides:
      getCreateTempTableSqlPrefix in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getDropDatabaseSchemaString

      public String getDropDatabaseSchemaString(String schema)
      Return the drop schema definition. Subclasses should override as needed.
      Overrides:
      getDropDatabaseSchemaString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • shouldAlwaysUseTempStorageForModifyAll

      public boolean shouldAlwaysUseTempStorageForModifyAll()
      INTERNAL: MySQL supports temp tables for update-all, delete-all queries.
      Overrides:
      shouldAlwaysUseTempStorageForModifyAll in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • shouldPrintStoredProcedureArgumentNameInCall

      public boolean shouldPrintStoredProcedureArgumentNameInCall()
      INTERNAL: MySQL stored procedure calls do not require the argument name be printed in the call string e.g. call MyStoredProc(?) instead of call MyStoredProc(myvariable = ?)
      Overrides:
      shouldPrintStoredProcedureArgumentNameInCall in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • shouldPrintForUpdateClause

      public boolean shouldPrintForUpdateClause()
      INTERNAL: MySQL FOR UPDATE clause has to be the last
      Overrides:
      shouldPrintForUpdateClause in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getInOutputProcedureToken

      public String getInOutputProcedureToken()
      INTERNAL: MySQL uses the INOUT keyword for this.
      Overrides:
      getInOutputProcedureToken in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getProcedureAsString

      public String getProcedureAsString()
      MySQL does not use the AS token.
      Overrides:
      getProcedureAsString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • shouldPrintOutputTokenAtStart

      public boolean shouldPrintOutputTokenAtStart()
      INTERNAL: MySQL requires the direction at the start of the argument.
      Overrides:
      shouldPrintOutputTokenAtStart in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getProcedureCallHeader

      public String getProcedureCallHeader()
      INTERNAL: Used for stored procedure calls.
      Overrides:
      getProcedureCallHeader in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getProcedureBeginString

      public String getProcedureBeginString()
      INTERNAL: MySQL requires BEGIN.
      Overrides:
      getProcedureBeginString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • getProcedureEndString

      public String getProcedureEndString()
      INTERNAL: MySQL requires END.
      Overrides:
      getProcedureEndString in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • writeUpdateOriginalFromTempTableSql

      public void writeUpdateOriginalFromTempTableSql(Writer writer, org.eclipse.persistence.internal.helper.DatabaseTable table, Collection pkFields, Collection assignedFields) throws IOException
      INTERNAL: Writes MySQL specific SQL for accessing temp tables for update-all queries.
      Overrides:
      writeUpdateOriginalFromTempTableSql in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Parameters:
      writer - for writing the sql
      table - is original table for which temp table is created.
      pkFields - primary key fields for the original table.
      assignedFields - fields to be assigned a new value.
      Throws:
      IOException

    • writeDeleteFromTargetTableUsingTempTableSql

      public void writeDeleteFromTargetTableUsingTempTableSql(Writer writer, org.eclipse.persistence.internal.helper.DatabaseTable table, org.eclipse.persistence.internal.helper.DatabaseTable targetTable, Collection pkFields, Collection targetPkFields, org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform platform) throws IOException
      INTERNAL: Writes MySQL specific SQL for accessing temp tables for delete-all queries.
      Overrides:
      writeDeleteFromTargetTableUsingTempTableSql in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Parameters:
      writer - for writing the sql
      table - is original table for which temp table is created.
      targetTable - is a table from which to delete.
      pkFields - primary key fields for the original table.
      targetPkFields - primary key fields for the target table.
      Throws:
      IOException

    • printSQLSelectStatement

      public void printSQLSelectStatement(org.eclipse.persistence.internal.databaseaccess.DatabaseCall call, org.eclipse.persistence.internal.expressions.ExpressionSQLPrinter printer, org.eclipse.persistence.internal.expressions.SQLSelectStatement statement)
      Description copied from class: org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      INTERNAL: Print the SQL representation of the statement on a stream, storing the fields in the DatabaseCall.
      Overrides:
      printSQLSelectStatement in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • requiresProcedureBrackets

      public boolean requiresProcedureBrackets()
      Used for stored procedure creation: MySQL platforms need brackets around arguments declaration even if no arguments exist.
      Overrides:
      requiresProcedureBrackets in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

    • printStoredFunctionReturnKeyWord

      public void printStoredFunctionReturnKeyWord(Writer writer) throws IOException
      INTERNAL: Prints return keyword for StoredFunctionDefinition: CREATE FUNCTION StoredFunction_In (P_IN BIGINT) RETURN BIGINT The method was introduced because MySQL requires "RETURNS" instead: CREATE FUNCTION StoredFunction_In (P_IN BIGINT) RETURNS BIGINT
      Overrides:
      printStoredFunctionReturnKeyWord in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Throws:
      IOException

    • getTableExistsQuery

      protected DataReadQuery getTableExistsQuery(TableDefinition table)
      INTERNAL: Returns query to check whether given table exists. Query execution returns a row when table exists or empty result otherwise.
      Overrides:
      getTableExistsQuery in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Parameters:
      table - database table meta-data
      Returns:
      query to check whether given table exists

    • checkTableExists

      public boolean checkTableExists(org.eclipse.persistence.internal.sessions.DatabaseSessionImpl session, TableDefinition table, boolean suppressLogging)
      INTERNAL: Executes and evaluates query to check whether given table exists. Returned value depends on returned result set being empty or not.
      Overrides:
      checkTableExists in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
      Parameters:
      session - current database session
      table - database table meta-data
      suppressLogging - whether to suppress logging during query execution
      Returns:
      value of true if given table exists or false otherwise