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:

Serialized Form

Since:

OracleAS TopLink 10g (10.1.3)

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, 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, tableQualifier, timestampQuery

Constructor Summary

Constructors

Constructor and Description
MySQLPlatform()

Method Summary

Modifier and Type	Method and 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, 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, 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, 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, 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, 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, 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, setTableQualifier, setTimestampQuery, setUpdateSequenceQuery, shouldNativeSequenceUseTransaction, shouldPrepare, shouldSelectDistinctIncludeOrderBy, shouldSelectIncludeOrderBy, supportsNativeSequenceNumbers, supportsSequenceObjects, toString, usesPlatformDefaultSequence

Methods inherited from class java.lang.Object

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

Constructor Detail

MySQLPlatform

public MySQLPlatform()

Method Detail

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:

MySQLPlatform

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