Package org.hibernate.dialect
Class InformixDialect
- java.lang.Object
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- org.hibernate.dialect.Dialect
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- org.hibernate.dialect.InformixDialect
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- All Implemented Interfaces:
ConversionContext
- Direct Known Subclasses:
Informix10Dialect
public class InformixDialect extends Dialect
Informix dialect.
Seems to work with Informix Dynamic Server Version 7.31.UD3, Informix JDBC driver version 2.21JC3.
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Field Summary
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Fields inherited from class org.hibernate.dialect.Dialect
CLOSED_QUOTE, DEFAULT_BATCH_SIZE, LEGACY_LOB_MERGE_STRATEGY, NEW_LOCATOR_LOB_MERGE_STRATEGY, NO_BATCH, QUOTE, STANDARD_DEFAULT_BATCH_LOAD_SIZING_STRATEGY, STREAM_XFER_LOB_MERGE_STRATEGY
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Constructor Summary
Constructors Constructor Description InformixDialect()
Creates newInformixDialect
instance.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description String
getAddColumnString()
The syntax used to add a column to a table (optional).String
getAddForeignKeyConstraintString(String constraintName, String foreignKeyDefinition)
String
getAddForeignKeyConstraintString(String constraintName, String[] foreignKey, String referencedTable, String[] primaryKey, boolean referencesPrimaryKey)
Informix constraint name must be at the end.String
getAddPrimaryKeyConstraintString(String constraintName)
Informix constraint name must be at the end.String
getCreateSequenceString(String sequenceName)
Typically dialects which support sequences can create a sequence with a single command.String
getCurrentTimestampSelectString()
Retrieve the command used to retrieve the current timestamp from the database.MultiTableBulkIdStrategy
getDefaultMultiTableBulkIdStrategy()
String
getDropSequenceString(String sequenceName)
Typically dialects which support sequences can drop a sequence with a single command.IdentityColumnSupport
getIdentityColumnSupport()
Get the appropriateIdentityColumnSupport
LimitHandler
getLimitHandler()
Returns the delegate managing LIMIT clause.String
getLimitString(String querySelect, int offset, int limit)
Given a limit and an offset, apply the limit clause to the query.String
getQuerySequencesString()
Get the select command used retrieve the names of all sequences.String
getSelectSequenceNextValString(String sequenceName)
Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.String
getSequenceNextValString(String sequenceName)
Generate the appropriate select statement to to retrieve the next value of a sequence.UniqueDelegate
getUniqueDelegate()
Get the UniqueDelegate supported by this dialectViolatedConstraintNameExtracter
getViolatedConstraintNameExtracter()
boolean
isCurrentTimestampSelectStringCallable()
Should the value returned byDialect.getCurrentTimestampSelectString()
be treated as callable.boolean
supportsCurrentTimestampSelection()
Does this dialect support a way to retrieve the database's current timestamp value?boolean
supportsLimit()
Does this dialect support some form of limiting query results via a SQL clause?boolean
supportsLimitOffset()
Does this dialect's LIMIT support (if any) additionally support specifying an offset?boolean
supportsPooledSequences()
Does this dialect support "pooled" sequences.boolean
supportsSequences()
Does this dialect support sequences?boolean
supportsVariableLimit()
Does this dialect support bind variables (i.e., prepared statement parameters) for its limit/offset?String
toBooleanValueString(boolean bool)
The SQL literal value to which this database maps boolean values.boolean
useMaxForLimit()
Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?-
Methods inherited from class org.hibernate.dialect.Dialect
addSqlHintOrComment, appendLockHint, appendLockHint, applyLocksToSql, areStringComparisonsCaseInsensitive, augmentRecognizedTableTypes, bindLimitParametersFirst, bindLimitParametersInReverseOrder, buildIdentifierHelper, buildSQLExceptionConversionDelegate, buildSQLExceptionConverter, canCreateCatalog, canCreateSchema, cast, cast, cast, closeQuote, contributeTypes, convertToFirstRowValue, createCaseFragment, createOuterJoinFragment, defaultScrollMode, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, dropConstraints, escapeComment, escapeLiteral, forceLimitUsage, forceLobAsLastValue, forUpdateOfColumns, getAddColumnSuffixString, getAddUniqueConstraintString, getAlterTableString, getAuxiliaryDatabaseObjectExporter, getCallableStatementSupport, getCascadeConstraintsString, getCaseInsensitiveLike, getCastTypeName, getColumnAliasExtractor, getColumnComment, getCreateCatalogCommand, getCreateMultisetTableString, getCreateSchemaCommand, getCreateSequenceString, getCreateSequenceStrings, getCreateSequenceStrings, getCreateTableString, getCrossJoinSeparator, getCurrentSchemaCommand, getCurrentTimestampSQLFunctionName, getDefaultBatchLoadSizingStrategy, getDefaultProperties, getDialect, getDialect, getDropCatalogCommand, getDropForeignKeyString, getDropSchemaCommand, getDropSequenceStrings, getDropTableString, getForeignKeyExporter, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateSkipLockedString, getForUpdateSkipLockedString, getForUpdateString, getForUpdateString, getForUpdateString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIndexExporter, getInExpressionCountLimit, getKeywords, getLimitString, getLobMergeStrategy, getLockingStrategy, getLowercaseFunction, getMaxAliasLength, getNameQualifierSupport, getNativeIdentifierGeneratorClass, getNativeIdentifierGeneratorStrategy, getNoColumnsInsertString, getNotExpression, getNullColumnString, getQueryHintString, getQueryHintString, getReadLockString, getReadLockString, getResultSet, getResultSet, getResultSet, getSchemaNameResolver, getSelectClauseNullString, getSelectGUIDString, getSequenceExporter, getSequenceInformationExtractor, getSqlTypeDescriptorOverride, getTableComment, getTableExporter, getTableTypeString, getTypeName, getTypeName, getUniqueKeyExporter, getWriteLockString, getWriteLockString, hasAlterTable, hasSelfReferentialForeignKeyBug, inlineLiteral, isJdbcLogWarningsEnabledByDefault, isLegacyLimitHandlerBehaviorEnabled, isLockTimeoutParameterized, isTypeNameRegistered, openQuote, prependComment, qualifyIndexName, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, registerResultSetOutParameter, registerResultSetOutParameter, remapSqlTypeDescriptor, renderOrderByElement, replaceResultVariableInOrderByClauseWithPosition, requiresCastingOfParametersInSelectClause, requiresParensForTupleDistinctCounts, supportsBindAsCallableArgument, supportsCascadeDelete, supportsCaseInsensitiveLike, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsCommentOn, supportsEmptyInList, supportsExistsInSelect, supportsExpectedLobUsagePattern, supportsIfExistsAfterAlterTable, supportsIfExistsAfterConstraintName, supportsIfExistsAfterTableName, supportsIfExistsBeforeConstraintName, supportsIfExistsBeforeTableName, supportsLobValueChangePropogation, supportsLockTimeouts, supportsNamedParameters, supportsNationalizedTypes, supportsNonQueryWithCTE, supportsNotNullUnique, supportsNoWait, supportsOuterJoinForUpdate, supportsParametersInInsertSelect, supportsPartitionBy, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsRowValueConstructorSyntax, supportsRowValueConstructorSyntaxInInList, supportsSkipLocked, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTupleCounts, supportsTupleDistinctCounts, supportsTuplesInSubqueries, supportsUnboundedLobLocatorMaterialization, supportsUnionAll, supportsUnique, supportsUniqueConstraintInCreateAlterTable, supportsValuesList, toString, transformSelectString, useFollowOnLocking, useFollowOnLocking, useInputStreamToInsertBlob
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Method Detail
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getAddColumnString
public String getAddColumnString()
Description copied from class:Dialect
The syntax used to add a column to a table (optional).- Overrides:
getAddColumnString
in classDialect
- Returns:
- The "add column" fragment.
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getAddForeignKeyConstraintString
public String getAddForeignKeyConstraintString(String constraintName, String[] foreignKey, String referencedTable, String[] primaryKey, boolean referencesPrimaryKey)
Informix constraint name must be at the end. The syntax used to add a foreign key constraint to a table.- Overrides:
getAddForeignKeyConstraintString
in classDialect
- Parameters:
constraintName
- The FK constraint name.foreignKey
- The names of the columns comprising the FKreferencedTable
- The table referenced by the FKprimaryKey
- The explicit columns in the referencedTable referenced by this FK.referencesPrimaryKey
- if false, constraint should be explicit about which column names the constraint refers to- Returns:
- the "add FK" fragment
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getAddForeignKeyConstraintString
public String getAddForeignKeyConstraintString(String constraintName, String foreignKeyDefinition)
- Overrides:
getAddForeignKeyConstraintString
in classDialect
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getAddPrimaryKeyConstraintString
public String getAddPrimaryKeyConstraintString(String constraintName)
Informix constraint name must be at the end. The syntax used to add a primary key constraint to a table.- Overrides:
getAddPrimaryKeyConstraintString
in classDialect
- Parameters:
constraintName
- The name of the PK constraint.- Returns:
- The "add PK" fragment
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getCreateSequenceString
public String getCreateSequenceString(String sequenceName)
Description copied from class:Dialect
Typically dialects which support sequences can create a sequence with a single command. This is convenience form ofDialect.getCreateSequenceStrings(java.lang.String)
to help facilitate that. Dialects which support sequences and can create a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to create a sequence should instead overrideDialect.getCreateSequenceStrings(java.lang.String)
.- Overrides:
getCreateSequenceString
in classDialect
- Parameters:
sequenceName
- The name of the sequence- Returns:
- The sequence creation command
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getDropSequenceString
public String getDropSequenceString(String sequenceName)
Description copied from class:Dialect
Typically dialects which support sequences can drop a sequence with a single command. This is convenience form ofDialect.getDropSequenceStrings(java.lang.String)
to help facilitate that. Dialects which support sequences and can drop a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to drop a sequence should instead overrideDialect.getDropSequenceStrings(java.lang.String)
.- Overrides:
getDropSequenceString
in classDialect
- Parameters:
sequenceName
- The name of the sequence- Returns:
- The sequence drop commands
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getSequenceNextValString
public String getSequenceNextValString(String sequenceName)
Description copied from class:Dialect
Generate the appropriate select statement to to retrieve the next value of a sequence. This should be a "stand alone" select statement.- Overrides:
getSequenceNextValString
in classDialect
- Parameters:
sequenceName
- the name of the sequence- Returns:
- String The "nextval" select string.
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getSelectSequenceNextValString
public String getSelectSequenceNextValString(String sequenceName)
Description copied from class:Dialect
Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement. This differs fromDialect.getSequenceNextValString(String)
in that this should return an expression usable within another statement.- Overrides:
getSelectSequenceNextValString
in classDialect
- Parameters:
sequenceName
- the name of the sequence- Returns:
- The "nextval" fragment.
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supportsSequences
public boolean supportsSequences()
Description copied from class:Dialect
Does this dialect support sequences?- Overrides:
supportsSequences
in classDialect
- Returns:
- True if sequences supported; false otherwise.
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supportsPooledSequences
public boolean supportsPooledSequences()
Description copied from class:Dialect
Does this dialect support "pooled" sequences. Not aware of a better name for this. Essentially can we specify the initial and increment values?- Overrides:
supportsPooledSequences
in classDialect
- Returns:
- True if such "pooled" sequences are supported; false otherwise.
- See Also:
Dialect.getCreateSequenceStrings(String, int, int)
,Dialect.getCreateSequenceString(String, int, int)
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getQuerySequencesString
public String getQuerySequencesString()
Description copied from class:Dialect
Get the select command used retrieve the names of all sequences.- Overrides:
getQuerySequencesString
in classDialect
- Returns:
- The select command; or null if sequences are not supported.
- See Also:
SchemaUpdate
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getLimitHandler
public LimitHandler getLimitHandler()
Description copied from class:Dialect
Returns the delegate managing LIMIT clause.- Overrides:
getLimitHandler
in classDialect
- Returns:
- LIMIT clause delegate.
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supportsLimit
public boolean supportsLimit()
Description copied from class:Dialect
Does this dialect support some form of limiting query results via a SQL clause?- Overrides:
supportsLimit
in classDialect
- Returns:
- True if this dialect supports some form of LIMIT.
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useMaxForLimit
public boolean useMaxForLimit()
Description copied from class:Dialect
Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows? This is easiest understood via an example. Consider you have a table with 20 rows, but you only want to retrieve rows number 11 through 20. Generally, a limit with offset would say that the offset = 11 and the limit = 10 (we only want 10 rows at a time); this is specifying the total number of returned rows. Some dialects require that we instead specify offset = 11 and limit = 20, where 20 is the "last" row we want relative to offset (i.e. total number of rows = 20 - 11 = 9) So essentially, is limit relative from offset? Or is limit absolute?- Overrides:
useMaxForLimit
in classDialect
- Returns:
- True if limit is relative from offset; false otherwise.
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supportsLimitOffset
public boolean supportsLimitOffset()
Description copied from class:Dialect
Does this dialect's LIMIT support (if any) additionally support specifying an offset?- Overrides:
supportsLimitOffset
in classDialect
- Returns:
- True if the dialect supports an offset within the limit support.
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getLimitString
public String getLimitString(String querySelect, int offset, int limit)
Description copied from class:Dialect
Given a limit and an offset, apply the limit clause to the query.- Overrides:
getLimitString
in classDialect
- Parameters:
querySelect
- The query to which to apply the limit.offset
- The offset of the limitlimit
- The limit of the limit ;)- Returns:
- The modified query statement with the limit applied.
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supportsVariableLimit
public boolean supportsVariableLimit()
Description copied from class:Dialect
Does this dialect support bind variables (i.e., prepared statement parameters) for its limit/offset?- Overrides:
supportsVariableLimit
in classDialect
- Returns:
- True if bind variables can be used; false otherwise.
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getViolatedConstraintNameExtracter
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter()
- Specified by:
getViolatedConstraintNameExtracter
in interfaceConversionContext
- Overrides:
getViolatedConstraintNameExtracter
in classDialect
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supportsCurrentTimestampSelection
public boolean supportsCurrentTimestampSelection()
Description copied from class:Dialect
Does this dialect support a way to retrieve the database's current timestamp value?- Overrides:
supportsCurrentTimestampSelection
in classDialect
- Returns:
- True if the current timestamp can be retrieved; false otherwise.
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isCurrentTimestampSelectStringCallable
public boolean isCurrentTimestampSelectStringCallable()
Description copied from class:Dialect
Should the value returned byDialect.getCurrentTimestampSelectString()
be treated as callable. Typically this indicates that JDBC escape syntax is being used...- Overrides:
isCurrentTimestampSelectStringCallable
in classDialect
- Returns:
- True if the
Dialect.getCurrentTimestampSelectString()
return is callable; false otherwise.
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getCurrentTimestampSelectString
public String getCurrentTimestampSelectString()
Description copied from class:Dialect
Retrieve the command used to retrieve the current timestamp from the database.- Overrides:
getCurrentTimestampSelectString
in classDialect
- Returns:
- The command.
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getDefaultMultiTableBulkIdStrategy
public MultiTableBulkIdStrategy getDefaultMultiTableBulkIdStrategy()
- Overrides:
getDefaultMultiTableBulkIdStrategy
in classDialect
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getUniqueDelegate
public UniqueDelegate getUniqueDelegate()
Description copied from class:Dialect
Get the UniqueDelegate supported by this dialect- Overrides:
getUniqueDelegate
in classDialect
- Returns:
- The UniqueDelegate
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getIdentityColumnSupport
public IdentityColumnSupport getIdentityColumnSupport()
Description copied from class:Dialect
Get the appropriateIdentityColumnSupport
- Overrides:
getIdentityColumnSupport
in classDialect
- Returns:
- the IdentityColumnSupport
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toBooleanValueString
public String toBooleanValueString(boolean bool)
Description copied from class:Dialect
The SQL literal value to which this database maps boolean values.- Overrides:
toBooleanValueString
in classDialect
- Parameters:
bool
- The boolean value- Returns:
- The appropriate SQL literal.
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