Class MySQLPlatform
- java.lang.Object
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- org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
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- org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
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- org.eclipse.persistence.platform.database.DatabasePlatform
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- org.eclipse.persistence.platform.database.MySQLPlatform
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- All Implemented Interfaces:
Serializable
,Cloneable
,CorePlatform<ConversionManager>
,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.
- Since:
- OracleAS TopLink 10g (10.1.3)
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class org.eclipse.persistence.platform.database.DatabasePlatform
DEFAULT_VARCHAR_SIZE
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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
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Fields inherited from class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
conversionManager, dataTypesConvertedFromAClass, dataTypesConvertedToAClass, defaultNativeSequenceToTable, defaultSeqenceAtNextValue, defaultSequence, endDelimiter, platformOperators, sequences, sequencesLock, startDelimiter, tableQualifier, timestampQuery
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Constructor Summary
Constructors Constructor Description MySQLPlatform()
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Method Summary
All Methods Instance Methods Concrete Methods 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, AbstractSession session, AbstractRecord row)
Return the stored procedure syntax for this platform.ValueReadQuery
buildSelectQueryForIdentity()
INTERNAL: Build the identity query for native sequencing.boolean
canBatchWriteWithOptimisticLocking(DatabaseCall call)
INTERNAL: Supports Batch Writing with Optimistic Locking.boolean
checkTableExists(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(DatabaseCall call, ExpressionSQLPrinter printer, 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 BIGINTboolean
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 lastboolean
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, DatabaseTable table, DatabaseTable targetTable, Collection pkFields, Collection targetPkFields, DatasourcePlatform platform)
INTERNAL: Writes MySQL specific SQL for accessing temp tables for delete-all queries.void
writeUpdateOriginalFromTempTableSql(Writer writer, 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, 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, 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
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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
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Method Detail
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initializeConnectionData
public void initializeConnectionData(Connection connection) throws SQLException
Description copied from class:DatabasePlatform
INTERNAL: Allow initialization from the connection.- Overrides:
initializeConnectionData
in classDatabasePlatform
- Throws:
SQLException
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isFractionalTimeSupported
public boolean isFractionalTimeSupported()
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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 classDatabasePlatform
- Throws:
IOException
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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 classDatabasePlatform
- Throws:
IOException
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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 classDatabasePlatform
- Throws:
IOException
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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 classDatabasePlatform
- Throws:
IOException
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buildFieldTypes
protected Hashtable buildFieldTypes()
Return the mapping of class types to database types for the schema framework.- Overrides:
buildFieldTypes
in classDatabasePlatform
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getJDBCType
public int getJDBCType(Class javaType)
Description copied from class:DatabasePlatform
Return the JDBC type for the Java type.- Overrides:
getJDBCType
in classDatabasePlatform
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buildSelectQueryForIdentity
public ValueReadQuery buildSelectQueryForIdentity()
INTERNAL: Build the identity query for native sequencing.- Overrides:
buildSelectQueryForIdentity
in classDatasourcePlatform
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buildProcedureCallString
public String buildProcedureCallString(StoredProcedureCall call, AbstractSession session, AbstractRecord row)
Return the stored procedure syntax for this platform.- Overrides:
buildProcedureCallString
in classDatabasePlatform
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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 classDatabasePlatform
- Parameters:
firstResultIndex
-maxResults
-- See Also:
MySQLPlatform
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canBatchWriteWithOptimisticLocking
public boolean canBatchWriteWithOptimisticLocking(DatabaseCall call)
INTERNAL: Supports Batch Writing with Optimistic Locking.- Overrides:
canBatchWriteWithOptimisticLocking
in classDatabasePlatform
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getConstraintDeletionString
public String getConstraintDeletionString()
INTERNAL: Used for constraint deletion.- Overrides:
getConstraintDeletionString
in classDatabasePlatform
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getUniqueConstraintDeletionString
public String getUniqueConstraintDeletionString()
INTERNAL: Used for unique constraint deletion.- Overrides:
getUniqueConstraintDeletionString
in classDatabasePlatform
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getFunctionCallHeader
public String getFunctionCallHeader()
Used for stored function calls.- Overrides:
getFunctionCallHeader
in classDatabasePlatform
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getProcedureCallTail
public String getProcedureCallTail()
Used for sp calls.- Overrides:
getProcedureCallTail
in classDatabasePlatform
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getSelectForUpdateString
public String getSelectForUpdateString()
INTERNAL: Used for pessimistic locking.- Overrides:
getSelectForUpdateString
in classDatabasePlatform
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isForUpdateCompatibleWithDistinct
public boolean isForUpdateCompatibleWithDistinct()
Description copied from class:DatabasePlatform
INTERNAL: Indicates whether SELECT DISTINCT ... FOR UPDATE is allowed by the platform (Oracle doesn't allow this).- Overrides:
isForUpdateCompatibleWithDistinct
in classDatabasePlatform
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getTimestampQuery
public ValueReadQuery getTimestampQuery()
INTERNAL: This method returns the query to select the timestamp from the server for MySQL.- Specified by:
getTimestampQuery
in interfacePlatform
- Overrides:
getTimestampQuery
in classDatasourcePlatform
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isMySQL
public boolean isMySQL()
Answers whether platform is MySQL.- Specified by:
isMySQL
in interfacePlatform
- Overrides:
isMySQL
in classDatasourcePlatform
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initializePlatformOperators
protected void initializePlatformOperators()
Initialize any platform-specific operators.- Overrides:
initializePlatformOperators
in classDatasourcePlatform
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logOperator
protected ExpressionOperator logOperator()
INTERNAL: Create the 10 based log operator for this platform.
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toNumberOperator
protected ExpressionOperator toNumberOperator()
INTERNAL: Build MySQL equivalent to TO_NUMBER.
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toDateOperator
protected ExpressionOperator toDateOperator()
INTERNAL: Build MySQL equivalent to TO_DATE.
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toCharOperator
protected ExpressionOperator toCharOperator()
INTERNAL: Build MySQL equivalent to TO_CHAR.
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dateToStringOperator
protected ExpressionOperator dateToStringOperator()
INTERNAL: Build MySQL equivalent to TO_CHAR.
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leftTrim2
protected ExpressionOperator leftTrim2()
INTERNAL: Build MySQL equivalent to LTRIM(string_exp, character). MySQL: TRIM(LEADING character FROM string_exp)
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rightTrim2
protected ExpressionOperator rightTrim2()
INTERNAL: Build MySQL equivalent to RTRIM(string_exp, character). MySQL: TRIM(TRAILING character FROM string_exp)
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currentDateOperator
protected ExpressionOperator currentDateOperator()
INTERNAL: Create the current date operator for this platform.
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printFieldIdentityClause
public void printFieldIdentityClause(Writer writer) throws ValidationException
INTERNAL: Append the receiver's field 'identity' constraint clause to a writer.- Overrides:
printFieldIdentityClause
in classDatabasePlatform
- Throws:
ValidationException
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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 classDatabasePlatform
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supportsIdentity
public boolean supportsIdentity()
INTERNAL: Indicates whether the platform supports identity. MySQL supports native sequencing through AUTO_INCREMENT field types.- Overrides:
supportsIdentity
in classDatasourcePlatform
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supportsCountDistinctWithMultipleFields
public boolean supportsCountDistinctWithMultipleFields()
INTERNAL: Indicates whether the platform supports the count distinct function with multiple fields.- Overrides:
supportsCountDistinctWithMultipleFields
in classDatabasePlatform
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requiresTableInIndexDropDDL
public boolean requiresTableInIndexDropDDL()
INTERNAL: Return if this database requires the table name when dropping an index.- Overrides:
requiresTableInIndexDropDDL
in classDatabasePlatform
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supportsGlobalTempTables
public boolean supportsGlobalTempTables()
INTERNAL: MySQL supports temp tables for update-all, delete-all queries.- Overrides:
supportsGlobalTempTables
in classDatabasePlatform
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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 classDatabasePlatform
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supportsStoredFunctions
public boolean supportsStoredFunctions()
- Overrides:
supportsStoredFunctions
in classDatabasePlatform
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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 classDatabasePlatform
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getCreateTempTableSqlPrefix
protected String getCreateTempTableSqlPrefix()
INTERNAL: MySQL temp table syntax, used for update-all, delete-all queries.- Overrides:
getCreateTempTableSqlPrefix
in classDatabasePlatform
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getDropDatabaseSchemaString
public String getDropDatabaseSchemaString(String schema)
Return the drop schema definition. Subclasses should override as needed.- Overrides:
getDropDatabaseSchemaString
in classDatabasePlatform
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shouldAlwaysUseTempStorageForModifyAll
public boolean shouldAlwaysUseTempStorageForModifyAll()
INTERNAL: MySQL supports temp tables for update-all, delete-all queries.- Overrides:
shouldAlwaysUseTempStorageForModifyAll
in classDatabasePlatform
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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 classDatabasePlatform
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shouldPrintForUpdateClause
public boolean shouldPrintForUpdateClause()
INTERNAL: MySQL FOR UPDATE clause has to be the last- Overrides:
shouldPrintForUpdateClause
in classDatabasePlatform
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getInOutputProcedureToken
public String getInOutputProcedureToken()
INTERNAL: MySQL uses the INOUT keyword for this.- Overrides:
getInOutputProcedureToken
in classDatabasePlatform
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getProcedureAsString
public String getProcedureAsString()
MySQL does not use the AS token.- Overrides:
getProcedureAsString
in classDatabasePlatform
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shouldPrintOutputTokenAtStart
public boolean shouldPrintOutputTokenAtStart()
INTERNAL: MySQL requires the direction at the start of the argument.- Overrides:
shouldPrintOutputTokenAtStart
in classDatabasePlatform
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getProcedureCallHeader
public String getProcedureCallHeader()
INTERNAL: Used for stored procedure calls.- Overrides:
getProcedureCallHeader
in classDatabasePlatform
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getProcedureBeginString
public String getProcedureBeginString()
INTERNAL: MySQL requires BEGIN.- Overrides:
getProcedureBeginString
in classDatabasePlatform
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getProcedureEndString
public String getProcedureEndString()
INTERNAL: MySQL requires END.- Overrides:
getProcedureEndString
in classDatabasePlatform
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writeUpdateOriginalFromTempTableSql
public void writeUpdateOriginalFromTempTableSql(Writer writer, DatabaseTable table, Collection pkFields, Collection assignedFields) throws IOException
INTERNAL: Writes MySQL specific SQL for accessing temp tables for update-all queries.- Overrides:
writeUpdateOriginalFromTempTableSql
in classDatabasePlatform
- Parameters:
writer
- for writing the sqltable
- 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
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writeDeleteFromTargetTableUsingTempTableSql
public void writeDeleteFromTargetTableUsingTempTableSql(Writer writer, DatabaseTable table, DatabaseTable targetTable, Collection pkFields, Collection targetPkFields, DatasourcePlatform platform) throws IOException
INTERNAL: Writes MySQL specific SQL for accessing temp tables for delete-all queries.- Overrides:
writeDeleteFromTargetTableUsingTempTableSql
in classDatabasePlatform
- Parameters:
writer
- for writing the sqltable
- 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
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printSQLSelectStatement
public void printSQLSelectStatement(DatabaseCall call, ExpressionSQLPrinter printer, SQLSelectStatement statement)
Description copied from class:DatabasePlatform
INTERNAL: Print the SQL representation of the statement on a stream, storing the fields in the DatabaseCall.- Overrides:
printSQLSelectStatement
in classDatabasePlatform
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requiresProcedureBrackets
public boolean requiresProcedureBrackets()
Used for stored procedure creation: MySQL platforms need brackets around arguments declaration even if no arguments exist.- Overrides:
requiresProcedureBrackets
in classDatabasePlatform
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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 classDatabasePlatform
- Throws:
IOException
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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 classDatabasePlatform
- Parameters:
table
- database table meta-data- Returns:
- query to check whether given table exists
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checkTableExists
public boolean checkTableExists(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 classDatabasePlatform
- Parameters:
session
- current database sessiontable
- database table meta-datasuppressLogging
- whether to suppress logging during query execution- Returns:
- value of
true
if given table exists orfalse
otherwise
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