Package org.eclipse.persistence.platform.database

Class Informix11Platform

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.InformixPlatform

org.eclipse.persistence.platform.database.Informix11Platform

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 Informix11Platform
extends InformixPlatform

An InformixPlatform that fixes many EclipseLink bugs related to Informix support.

See Also:

• EclipseLink bug 401393
• EclipseLink bug 401718
• EclipseLink bug 401746
• EclipseLink bug 402037
• EclipseLink bug 402180
• EclipseLink bug 402600
• EclipseLink bug 402953
• EclipseLink bug 405645
• Serialized Form

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
Informix11Platform()	Creates a new Informix11Platform.

Method Summary

Modifier and Type	Method	Description
protected void	appendBoolean(Boolean booleanValue, Writer writer)	Fixes EclipseLink bug 401746 by writing out either 't' or 'f'—with single quotes— instead of 1 or 0.
protected ExpressionOperator	currentDateOperator()	Fixes EclipseLink bug 402953 by returning the result of running the following code: ExpressionOperator.simpleFunctionNoParentheses(ExpressionOperator.CurrentDate, "CURRENT YEAR TO DAY");
protected ExpressionOperator	currentTimeOperator()	Fixes EclipseLink bug 402953 by returning the result of running the following code: ExpressionOperator.simpleFunctionNoParentheses(ExpressionOperator.CurrentDate, "CURRENT YEAR TO FRACTION(3)");
protected ExpressionOperator	distinctOperator()	Fixes EclipseLink bug 402600 by making sure that the Distinct ExpressionOperator is set to print as DISTINCT  (no parentheses, one trailing space), and fixes
boolean	dontBindUpdateAllQueryUsingTempTables()	Returns true when invoked to indicate that parameter binding must not be used when working with temporary tables as part of an UPDATE query.
protected String	getCreateTempTableSqlPrefix()	Returns CREATE TEMP TABLE when invoked, per the Informix 11.70 Information Center documentation.
protected String	getCreateTempTableSqlSuffix()	Returns WITH NO LOG when invoked, per the Informix 11.70 Information Center documentation, since transactions are not needed on temp tables for the purposes for which EclipseLink uses them.
Object	getObjectFromResultSet(ResultSet resultSet, int columnNumber, int jdbcType, org.eclipse.persistence.internal.sessions.AbstractSession session)	Overrides DatabasePlatform.getObjectFromResultSet(ResultSet, int, int, AbstractSession) so that if the supplied jdbcType is equal to Types.LONGVARCHAR, then the ResultSet.getString(int) method (instead of the ResultSet.getObject(int) method) is used to fetch the "raw" value of the column indicated by the supplied columnNumber from the supplied ResultSet.
org.eclipse.persistence.internal.helper.DatabaseTable	getTempTableForTable(org.eclipse.persistence.internal.helper.DatabaseTable table)	Overrides the superclass implementation to return a new DatabaseTable with no DatabaseTable.getTableQualifier().
protected void	initializePlatformOperators()	Fixes EclipseLink bug 402600 by making sure that the Distinct ExpressionOperator is set to print as DISTINCT  (no parentheses, one trailing space), and fixes EclipseLink bug 402953 by adding platform operators for current date and current time.
boolean	isInformixOuterJoin()	Overrides the default behavior to return false, indicating that ANSI OUTER JOIN syntax should be used, since all modern versions of Informix support it.
boolean	shouldAlwaysUseTempStorageForModifyAll()	Returns true when invoked to force Informix to use temporary storage when constructing bulk UPDATE statements.
boolean	supportsLocalTempTables()	Returns true when invoked to indicate that Informix does indeed support local temporary tables.
void	writeUpdateOriginalFromTempTableSql(Writer writer, org.eclipse.persistence.internal.helper.DatabaseTable table, Collection pkFields, Collection assignedFields)	Overrides DatabasePlatform.writeUpdateOriginalFromTempTableSql(Writer, DatabaseTable, Collection, Collection) to ensure that a SET clause that is supposed to set a value for only one column does not wrap that column name in parentheses.

Methods inherited from class org.eclipse.persistence.platform.database.InformixPlatform

appendCalendar, appendDate, appendInformixCalendar, appendInformixTimestamp, appendTime, appendTimestamp, buildFieldTypes, buildSelectQueryForIdentity, buildSelectQueryForSequenceObject, getMaxFieldNameSize, getSelectForUpdateString, initializeConnectionData, isAlterSequenceObjectSupported, isInformix, maximumNumericValues, minimumNumericValues, printFieldIdentityClause, printFieldTypeSize, requiresProcedureCallBrackets, shouldPrintConstraintNameAfter, shouldSelectIncludeOrderBy, supportsIdentity, supportsSequenceObjects

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

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

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

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

Methods inherited from class java.lang.Object

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

Constructor Details

Informix11Platform

public Informix11Platform()

Creates a new Informix11Platform. Calls DatabasePlatform.setShouldBindLiterals(boolean) with false as a parameter value.

See Also:

• EclipseLink bug 401718

Method Details

initializePlatformOperators

protected void initializePlatformOperators()

Fixes EclipseLink bug 402600 by making sure that the Distinct ExpressionOperator is set to print as DISTINCT  (no parentheses, one trailing space), and fixes EclipseLink bug 402953 by adding platform operators for current date and current time.

Overrides:

initializePlatformOperators in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

See Also:

• currentDateOperator()
• currentTimeOperator()
• EclipseLink bug 402600
• EclipseLink bug 402953

currentDateOperator

protected ExpressionOperator currentDateOperator()

Fixes EclipseLink bug 402953 by returning the result of running the following code: ExpressionOperator.simpleFunctionNoParentheses(ExpressionOperator.CurrentDate, "CURRENT YEAR TO DAY");

Returns:

a non-null ExpressionOperator

See Also:

• EclipseLink bug 402953

currentTimeOperator

protected ExpressionOperator currentTimeOperator()

Fixes EclipseLink bug 402953 by returning the result of running the following code: ExpressionOperator.simpleFunctionNoParentheses(ExpressionOperator.CurrentDate, "CURRENT YEAR TO FRACTION(3)");

Returns:

a non-null ExpressionOperator EclipseLink bug 402953

distinctOperator

protected ExpressionOperator distinctOperator()

Fixes EclipseLink bug 402600 by making sure that the Distinct ExpressionOperator is set to print as DISTINCT  (no parentheses, one trailing space), and fixes

See Also:

• EclipseLink bug 402600

isInformixOuterJoin

public boolean isInformixOuterJoin()

Overrides the default behavior to return false, indicating that ANSI OUTER JOIN syntax should be used, since all modern versions of Informix support it.

Overrides:

isInformixOuterJoin in class InformixPlatform

Returns:

false when invoked

See Also:

• EclipseLink bug 401393

appendBoolean

protected void appendBoolean(Boolean booleanValue,
 Writer writer)
                      throws IOException

Fixes EclipseLink bug 401746 by writing out either 't' or 'f'—with single quotes— instead of 1 or 0.

Overrides:

appendBoolean in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Parameters:

booleanValue - a non-null Boolean to append

writer - a non-null Writer to append the literal value to

Throws:

IllegalArgumentException - if either booleanValue or writer is null

IOException - if the supplied Writer throws an IOException

See Also:

• EclipseLink bug 401393

dontBindUpdateAllQueryUsingTempTables

public boolean dontBindUpdateAllQueryUsingTempTables()

Returns true when invoked to indicate that parameter binding must not be used when working with temporary tables as part of an UPDATE query.

Parsing the English is a little difficult in this method name. It means: "Do not bind parameters in queries that are part of an overall 'update all' operation where temporary tables are being used."

Overrides:

dontBindUpdateAllQueryUsingTempTables in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Returns:

true when invoked

See Also:

• EclipseLink bug 402037

shouldAlwaysUseTempStorageForModifyAll

public boolean shouldAlwaysUseTempStorageForModifyAll()

Returns true when invoked to force Informix to use temporary storage when constructing bulk UPDATE statements.

Overrides:

shouldAlwaysUseTempStorageForModifyAll in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Returns:

true in all cases

See Also:

• EclipseLink bug 402037

supportsLocalTempTables

public boolean supportsLocalTempTables()

Returns true when invoked to indicate that Informix does indeed support local temporary tables.

local is defined by EclipseLink in DatabasePlatform to mean:

"Local" means that several threads may create temporary tables with the same name. Local temporary table is created in the beginning of UpdateAllQuery execution and dropped in the end of it.

Overrides:

supportsLocalTempTables in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Returns:

true when invoked

See Also:

• EclipseLink bug 402037

getCreateTempTableSqlPrefix

protected String getCreateTempTableSqlPrefix()

Returns CREATE TEMP TABLE when invoked, per the Informix 11.70 Information Center documentation.

While Informix 11.70 supports an additional IF NOT EXISTS clause, Informix 11.50 does not, so this method does not add the IF NOT EXISTS clause. In practice this should be fine as temporary tables are scoped to the Informix session, and EclipseLink takes care of cleaning up any temporary tables that it creates.

Overrides:

getCreateTempTableSqlPrefix in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Returns:

CREATE TEMP TABLE when invoked

See Also:

• EclipseLink bug 402037

getTempTableForTable

public org.eclipse.persistence.internal.helper.DatabaseTable getTempTableForTable(org.eclipse.persistence.internal.helper.DatabaseTable table)

Overrides the superclass implementation to return a new DatabaseTable with no DatabaseTable.getTableQualifier(). Informix 11.50 and above do not support table qualifiers of any kind on temporary tables.

Overrides:

getTempTableForTable in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Parameters:

table - the DatabaseTable for which a temporary DatabaseTable should be returned; must not be null

Returns:

a new DatabaseTable with no table qualifier

Throws:

IllegalArgumentException - if table is null

See Also:

• EclipseLink bug 402037
• EclipseLink bug 402180

getCreateTempTableSqlSuffix

protected String getCreateTempTableSqlSuffix()

Returns WITH NO LOG when invoked, per the Informix 11.70 Information Center documentation, since transactions are not needed on temp tables for the purposes for which EclipseLink uses them.

Overrides:

getCreateTempTableSqlSuffix in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Returns:

WITH NO LOG when invoked

See Also:

• EclipseLink bug 402037

writeUpdateOriginalFromTempTableSql

public void writeUpdateOriginalFromTempTableSql(Writer writer,
 org.eclipse.persistence.internal.helper.DatabaseTable table,
 Collection pkFields,
 Collection assignedFields)
                                         throws IOException

Overrides DatabasePlatform.writeUpdateOriginalFromTempTableSql(Writer, DatabaseTable, Collection, Collection) to ensure that a SET clause that is supposed to set a value for only one column does not wrap that column name in parentheses.

The code for this method is identical to that of the stock H2Platform, since the H2 database has the same requirement.

Overrides:

writeUpdateOriginalFromTempTableSql in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Parameters:

writer - the Writer that will be writing SQL; must not be null

table - the DatabaseTable to be updated; must not be null

pkFields - a Collection of DatabaseFields each of which is a primary key of the table to be updated; must not be null

assignedFields - a Collection of DatabaseFields that are receiving updated values; must not be null

Throws:

IOException - if an input/output error is thrown by the supplied Writer

NullPointerException - if any of the supplied parameters is null

See Also:

• EclipseLink bug 402037

getObjectFromResultSet

public Object getObjectFromResultSet(ResultSet resultSet,
 int columnNumber,
 int jdbcType,
 org.eclipse.persistence.internal.sessions.AbstractSession session)
                              throws SQLException

Overrides DatabasePlatform.getObjectFromResultSet(ResultSet, int, int, AbstractSession) so that if the supplied jdbcType is equal to Types.LONGVARCHAR, then the ResultSet.getString(int) method (instead of the ResultSet.getObject(int) method) is used to fetch the "raw" value of the column indicated by the supplied columnNumber from the supplied ResultSet.

This works around an issue with the Informix JDBC driver, version 3.70.JC7 and earlier, where a TEXT column is reported to be mappable to the JDBC type of LONGVARCHAR, but the actual object returned by ResultSet.getObject(int) is a byte[] (instead of either a char[] or a String). Invoking ResultSet.getString(int) instead returns the desired result.

Overrides:

getObjectFromResultSet in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform

Parameters:

resultSet - the ResultSet to get an Object from; may be null

columnNumber - the 1-based column number indicating the column to use

jdbcType - an int indicating the JDBC type of which the column in the ResultSet indicated by the supplied columnNumber is expected to be

session - an AbstractSession that, when used at all, is passed to the superclass implementation of this method; may be null

Returns:

the Object resulting from a call to ResultSet.getObject(int); may be null

Throws:

SQLException - if any error occurs

See Also:

• EclipseLink bug 405645