H2Platform (EclipseLink 2.6.1, API Reference)

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.H2Platform

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, org.eclipse.persistence.internal.core.databaseaccess.CorePlatform<org.eclipse.persistence.internal.helper.ConversionManager>, org.eclipse.persistence.internal.databaseaccess.Platform
```
public class H2Platform
extends DatabasePlatform
```
See Also:
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, shouldCacheAllStatements, shouldCreateIndicesOnForeignKeys, shouldForceFieldNamesToUpperCase, shouldIgnoreCaseOnFieldComparisons, shouldOptimizeDataConversion, shouldTrimStrings, statementCacheSize, storedProcedureTerminationToken, stringBindingSize, structConverters, supportsAutoCommit, tableCreationSuffix, transactionIsolation, typeConverters, Types_NCLOB, Types_SQLXML, useJDBCStoredProcedureSyntax, useNationalCharacterVarying, useRownumFiltering, usesBatchWriting, usesByteArrayBinding, usesJDBCBatchWriting, usesNativeBatchWriting, usesNativeSQL, usesStreamsForBinding, usesStringBinding
- Fields inherited from class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
  conversionManager, dataTypesConvertedFromAClass, dataTypesConvertedToAClass, defaultNativeSequenceToTable, defaultSequence, endDelimiter, platformOperators, sequences, sequencesLock, startDelimiter, tableQualifier, timestampQuery

Constructor Summary

Constructors
Constructor and Description

H2Platform()

Constructors
Constructor and Description
`H2Platform()`

Method Summary

Methods
Modifier and Type	Method and Description
`protected java.util.Hashtable`	`buildFieldTypes()`
`ValueReadQuery`	`buildSelectQueryForIdentity()`
`ValueReadQuery`	`buildSelectQueryForSequenceObject(java.lang.String seqName, java.lang.Integer size)`
`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 java.lang.String`	`getCreateTempTableSqlPrefix()`
`ValueReadQuery`	`getTimestampQuery()`
`protected void`	`initializePlatformOperators()`
`boolean`	`isAlterSequenceObjectSupported()`
`boolean`	`isDynamicSQLRequiredForFunctions()` INTERNAL H2 has some issues with using parameters on certain functions and relations.
`boolean`	`isH2()`
`static ExpressionOperator`	`monthsBetweenOperator()` INTERNAL: Use MONTH function for MONTH_BETWEEN.
`void`	`printFieldIdentityClause(java.io.Writer writer)`
`void`	`printSQLSelectStatement(org.eclipse.persistence.internal.databaseaccess.DatabaseCall call, org.eclipse.persistence.internal.expressions.ExpressionSQLPrinter printer, org.eclipse.persistence.internal.expressions.SQLSelectStatement statement)` Print the pagination SQL using H2 syntax " LIMIT <max> OFFSET <first>".
`boolean`	`supportsForeignKeyConstraints()`
`boolean`	`supportsGlobalTempTables()`
`boolean`	`supportsIdentity()`
`boolean`	`supportsSequenceObjects()`
`boolean`	`supportsStoredFunctions()`
`static ExpressionOperator`	`toNumberOperator()` INTERNAL: Use CONVERT function for toNumber.
`void`	`writeUpdateOriginalFromTempTableSql(java.io.Writer writer, org.eclipse.persistence.internal.helper.DatabaseTable table, java.util.Collection pkFields, java.util.Collection assignedFields)` H2 does not allow using () in the update if only one field.

Methods inherited from class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
addBatch, addStructConverter, allowsSizeInProcedureArguments, appendBoolean, appendByteArray, appendCalendar, appendDate, appendLiteralToCall, appendLiteralToCallWithBinding, appendNumber, appendParameter, appendParameterInternal, appendString, appendTime, appendTimestamp, autoCommit, beginTransaction, buildBatchCriteria, buildBatchCriteriaForComplexId, buildCallWithReturning, buildClassTypes, buildCreateIndex, buildCreateIndex, buildDropIndex, buildDropIndex, buildProcedureCallString, buildSequenceObjectAlterIncrementWriter, buildSequenceObjectCreationWriter, buildSequenceObjectDeletionWriter, canBatchWriteWithOptimisticLocking, canBuildCallWithReturning, commitTransaction, convertToDatabaseType, copyInto, createArray, createArray, createPlatformDefaultSequence, createStruct, createStruct, dontBindUpdateAllQueryUsingTempTables, executeBatch, executeStoredProcedure, freeTemporaryObject, getAssignmentString, getBatchBeginString, getBatchDelimiterString, getBatchEndString, getBatchRowCountAssignString, getBatchRowCountDeclareString, getBatchRowCountReturnString, getBatchWritingMechanism, getCastSizeForVarcharParameter, getClassTypes, getConnection, getConstraintDeletionString, getCreateDatabaseSchemaString, getCreateTempTableSqlBodyForTable, getCreateTempTableSqlSuffix, getCreateViewString, getCreationInOutputProcedureToken, getCreationOutputProcedureToken, getCursorCode, getCustomModifyValueForCall, getDefaultSequenceTableName, getDriverSupportsNVarChar, getDropCascadeString, getDropDatabaseSchemaString, getFieldTypeDefinition, getFieldTypes, getFunctionCallHeader, getIdentifierQuoteCharacter, getIndexNamePrefix, getInOutputProcedureToken, getInputProcedureToken, getJDBCOuterJoinString, getJDBCType, getJDBCType, getJDBCTypeForSetNull, getJdbcTypeName, getMaxBatchWritingSize, getMaxFieldNameSize, getMaxForeignKeyNameSize, getMaxIndexNameSize, getMaxUniqueKeyNameSize, getNoWaitString, getObjectFromResultSet, getOutputProcedureToken, getPartitioningCallback, getPingSQL, getProcedureArgumentSetter, getProcedureArgumentString, getProcedureAsString, getProcedureBeginString, getProcedureCallHeader, getProcedureCallTail, getProcedureEndString, getQualifiedName, getQualifiedSequenceTableName, getRefValue, getRefValue, getSelectForUpdateNoWaitString, getSelectForUpdateOfString, getSelectForUpdateString, getSelectForUpdateWaitString, getSequenceCounterFieldName, getSequenceNameFieldName, getSequencePreallocationSize, getSequenceTableName, getStatementCacheSize, getStoredProcedureParameterPrefix, getStoredProcedureTerminationToken, getStringBindingSize, getStructConverters, getTableCreationSuffix, getTempTableForTable, getTransactionIsolation, getTypeConverters, getUniqueConstraintDeletionString, getUseNationalCharacterVaryingTypeForString, getVPDClearIdentifierQuery, getVPDCreationFunctionString, getVPDCreationPolicyString, getVPDDeletionString, getVPDSetIdentifierQuery, hasPartitioningCallback, initialize, initializeConnectionData, isCastRequired, isForUpdateCompatibleWithDistinct, isInformixOuterJoin, isJDBCExecuteCompliant, isLobCompatibleWithDistinct, isLockTimeoutException, isNullAllowedInSelectClause, isOutputAllowWithResultSet, isRowCountOutputParameterRequired, isXDBDocument, maximumNumericValues, minimumNumericValues, minimumTimeIncrement, prepareBatchStatement, printFieldNotNullClause, printFieldNullClause, printFieldTypeSize, printFieldTypeSize, printFieldUnique, printFieldUnique, printStoredFunctionReturnKeyWord, printValuelist, printValuelist, registerOutputParameter, requiresNamedPrimaryKeyConstraints, requiresProcedureBrackets, requiresProcedureCallBrackets, requiresProcedureCallOuputToken, requiresTableInIndexDropDDL, requiresTypeNameToRegisterOutputParameter, requiresUniqueConstraintCreationOnTableCreate, retrieveFirstPrimaryKeyOrOne, rollbackTransaction, setBatchWritingMechanism, setCastSizeForVarcharParameter, setClassTypes, setCursorCode, setDriverName, setDriverSupportsNVarChar, setFieldTypes, setIsCastRequired, setMaxBatchWritingSize, setNullFromDatabaseField, setParameterValueInDatabaseCall, setPartitioningCallback, setPingSQL, setPrintInnerJoinInWhereClause, setPrintOuterJoinInWhereClause, setSequenceCounterFieldName, setSequenceNameFieldName, setSequenceTableName, setShouldBindAllParameters, setShouldBindLiterals, setShouldCacheAllStatements, setShouldCreateIndicesOnForeignKeys, setShouldForceFieldNamesToUpperCase, setShouldIgnoreCaseOnFieldComparisons, setShouldOptimizeDataConversion, setShouldTrimStrings, setShouldUseRownumFiltering, setStatementCacheSize, setStoredProcedureTerminationToken, setStringBindingSize, setSupportsAutoCommit, setTableCreationSuffix, setTransactionIsolation, setUseJDBCStoredProcedureSyntax, setUseNationalCharacterVaryingTypeForString, setUsesBatchWriting, setUsesByteArrayBinding, setUsesJDBCBatchWriting, setUsesNativeBatchWriting, setUsesNativeSQL, setUsesStreamsForBinding, setUsesStringBinding, shouldAlwaysUseTempStorageForModifyAll, shouldBindAllParameters, shouldBindLiterals, shouldCacheAllStatements, shouldCreateIndicesForPrimaryKeys, shouldCreateIndicesOnForeignKeys, shouldCreateIndicesOnUniqueKeys, shouldForceFieldNamesToUpperCase, shouldIgnoreCaseOnFieldComparisons, shouldIgnoreException, shouldOptimizeDataConversion, shouldPrintAliasForUpdate, shouldPrintConstraintNameAfter, shouldPrintFieldIdentityClause, shouldPrintForUpdateClause, shouldPrintInnerJoinInWhereClause, shouldPrintInOutputTokenBeforeType, shouldPrintInputTokenAtStart, shouldPrintLockingClauseAfterWhereClause, shouldPrintOuterJoinInWhereClause, shouldPrintOutputTokenAtStart, shouldPrintOutputTokenBeforeType, shouldPrintStoredProcedureArgumentNameInCall, shouldPrintStoredProcedureVariablesAfterBeginString, shouldTempTableSpecifyPrimaryKeys, shouldTrimStrings, shouldUseCustomModifyForCall, shouldUseGetSetNString, shouldUseJDBCOuterJoinSyntax, shouldUseRownumFiltering, supportsANSIInnerJoinSyntax, supportsAutoCommit, supportsAutoConversionToNumericForArithmeticOperations, supportsCountDistinctWithMultipleFields, supportsDeleteOnCascade, supportsIndexes, supportsIndividualTableLocking, supportsLocalTempTables, supportsLockingQueriesWithMultipleTables, supportsNestingOuterJoins, supportsOuterJoinsWithBrackets, supportsPrimaryKeyConstraint, supportsTempTables, supportsUniqueColumns, supportsUniqueKeyConstraints, supportsVPD, 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, getConversionManager, getDataTypesConvertedFrom, getDataTypesConvertedTo, getDefaultNativeSequenceToTable, getDefaultSequence, getDefaultSequenceToWrite, getEndDelimiter, getOperator, getPlatformOperators, getSelectSequenceQuery, getSequence, getSequences, getSequencesToWrite, getStartDelimiter, getTableQualifier, getTimestampFromServer, getUpdateSequenceQuery, hasDefaultSequence, initializeDefaultQueries, isAccess, isAttunity, isCloudscape, isDB2, isDBase, isDerby, isFirebird, isHANA, isHSQL, isInformix, isMaxDB, isMySQL, isODBC, isOracle, isOracle9, isPervasive, isPointBase, isPostgreSQL, isSQLAnywhere, isSQLServer, isSybase, isSymfoware, isTimesTen, isTimesTen7, removeAllSequences, removeSequence, sequencesAfterCloneCleanup, setConversionManager, setDefaultNativeSequenceToTable, setDefaultSequence, setEndDelimiter, setSelectSequenceNumberQuery, setSequencePreallocationSize, setSequences, setStartDelimiter, setTableQualifier, setTimestampQuery, setUpdateSequenceQuery, shouldNativeSequenceUseTransaction, shouldPrepare, shouldSelectDistinctIncludeOrderBy, shouldSelectIncludeOrderBy, supportsNativeSequenceNumbers, toString, usesPlatformDefaultSequence

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - H2Platform
```
public H2Platform()
```
- Method Detail
  - 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)
```
    Print the pagination SQL using H2 syntax " LIMIT <max> OFFSET <first>".
    
    Overrides:
    
    printSQLSelectStatement 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 H2 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
  - buildFieldTypes
```
protected java.util.Hashtable buildFieldTypes()
```
    Overrides:
    
    buildFieldTypes in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
  - isAlterSequenceObjectSupported
```
public boolean isAlterSequenceObjectSupported()
```
    Overrides:
    
    isAlterSequenceObjectSupported in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
  - isDynamicSQLRequiredForFunctions
```
public boolean isDynamicSQLRequiredForFunctions()
```
    INTERNAL H2 has some issues with using parameters on certain functions and relations. This allows statements to disable binding only in these cases.
    
    Overrides:
    
    isDynamicSQLRequiredForFunctions in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
  - buildSelectQueryForSequenceObject
```
public ValueReadQuery buildSelectQueryForSequenceObject(java.lang.String seqName,
                                               java.lang.Integer size)
```
    Overrides:
    
    buildSelectQueryForSequenceObject in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
  - supportsIdentity
```
public boolean supportsIdentity()
```
    Overrides:
    
    supportsIdentity in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
  - supportsSequenceObjects
```
public boolean supportsSequenceObjects()
```
    Overrides:
    
    supportsSequenceObjects in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
  - buildSelectQueryForIdentity
```
public ValueReadQuery buildSelectQueryForIdentity()
```
    Overrides:
    
    buildSelectQueryForIdentity in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
  - printFieldIdentityClause
```
public void printFieldIdentityClause(java.io.Writer writer)
                              throws ValidationException
```
    Overrides:
    
    printFieldIdentityClause in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
    
    Throws:
    
    ValidationException
  - supportsForeignKeyConstraints
```
public boolean supportsForeignKeyConstraints()
```
    Overrides:
    
    supportsForeignKeyConstraints in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
  - supportsGlobalTempTables
```
public boolean supportsGlobalTempTables()
```
    Overrides:
    
    supportsGlobalTempTables in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
  - getCreateTempTableSqlPrefix
```
protected java.lang.String getCreateTempTableSqlPrefix()
```
    Overrides:
    
    getCreateTempTableSqlPrefix in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
  - writeUpdateOriginalFromTempTableSql
```
public void writeUpdateOriginalFromTempTableSql(java.io.Writer writer,
                                       org.eclipse.persistence.internal.helper.DatabaseTable table,
                                       java.util.Collection pkFields,
                                       java.util.Collection assignedFields)
                                         throws java.io.IOException
```
    H2 does not allow using () in the update if only one field.
    
    Overrides:
    
    writeUpdateOriginalFromTempTableSql in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
    
    Throws:
    
    java.io.IOException
  - supportsStoredFunctions
```
public boolean supportsStoredFunctions()
```
    Overrides:
    
    supportsStoredFunctions in class org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
  - getTimestampQuery
```
public ValueReadQuery getTimestampQuery()
```
    Specified by:
    
    getTimestampQuery in interface org.eclipse.persistence.internal.databaseaccess.Platform
    
    Overrides:
    
    getTimestampQuery in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
  - initializePlatformOperators
```
protected void initializePlatformOperators()
```
    Overrides:
    
    initializePlatformOperators in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
  - toNumberOperator
```
public static ExpressionOperator toNumberOperator()
```
    INTERNAL: Use CONVERT function for toNumber.
  - monthsBetweenOperator
```
public static ExpressionOperator monthsBetweenOperator()
```
    INTERNAL: Use MONTH function for MONTH_BETWEEN.
  - isH2
```
public boolean isH2()
```
    Specified by:
    
    isH2 in interface org.eclipse.persistence.internal.databaseaccess.Platform
    
    Overrides:
    
    isH2 in class org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

Class H2Platform

Field Summary

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

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

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

Constructor Summary

Method Summary

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

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

Methods inherited from class java.lang.Object

Constructor Detail

H2Platform

Method Detail

printSQLSelectStatement

computeMaxRowsForSQL

buildFieldTypes

isAlterSequenceObjectSupported

isDynamicSQLRequiredForFunctions

buildSelectQueryForSequenceObject

supportsIdentity

supportsSequenceObjects

buildSelectQueryForIdentity

printFieldIdentityClause

supportsForeignKeyConstraints

supportsGlobalTempTables

getCreateTempTableSqlPrefix

writeUpdateOriginalFromTempTableSql

supportsStoredFunctions

getTimestampQuery

initializePlatformOperators

toNumberOperator

monthsBetweenOperator

isH2