org.hibernate.dialect
Class SybaseDialect

java.lang.Object
  org.hibernate.dialect.Dialect
      org.hibernate.dialect.SybaseDialect

Direct Known Subclasses:

SQLServerDialect, Sybase11Dialect, SybaseAnywhereDialect

public class SybaseDialect
extends Dialect

An SQL dialect compatible with Sybase and MS SQL Server.

Author:

Gavin King

Field Summary

Fields inherited from class org.hibernate.dialect.Dialect

CLOSED_QUOTE, DEFAULT_BATCH_SIZE, NO_BATCH, QUOTE

Constructor Summary

SybaseDialect()

Method Summary

String	appendIdentitySelectToInsert(String insertSQL) Provided we Dialect.supportsInsertSelectIdentity(), then attch the "select identity" clause to the insert statement.
String	appendLockHint(LockMode mode, String tableName) Some dialects support an alternative means to SELECT FOR UPDATE, whereby a "lock hint" is appends to the table name in the from clause.
String	applyLocksToSql(String sql, Map aliasedLockModes, Map keyColumnNames) Modifies the given SQL by applying the appropriate updates for the specified lock modes and key columns.
boolean	doesReadCommittedCauseWritersToBlockReaders() For the underlying database, is READ_COMMITTED isolation implemented by forcing readers to wait for write locks to be released?
boolean	doesRepeatableReadCauseReadersToBlockWriters() For the underlying database, is REPEATABLE_READ isolation implemented by forcing writers to wait for read locks to be released?
boolean	dropTemporaryTableAfterUse() Do we need to drop the temporary table after use?
String	generateTemporaryTableName(String baseTableName) Generate a temporary table name given the bas table.
String	getAddColumnString() The syntax used to add a column to a table (optional).
String	getCurrentTimestampSelectString() Retrieve the command used to retrieve the current timestammp from the database.
String	getForUpdateString() Get the string to append to SELECT statements to acquire locks for this dialect.
String	getIdentityColumnString() The syntax used during DDL to define a column as being an IDENTITY.
String	getIdentitySelectString() Get the select command to use to retrieve the last generated IDENTITY value.
String	getNullColumnString() The keyword used to specify a nullable column.
ResultSet	getResultSet(CallableStatement ps) Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the OUT parameter.
boolean	isCurrentTimestampSelectStringCallable() Should the value returned by Dialect.getCurrentTimestampSelectString() be treated as callable.
boolean	qualifyIndexName() Do we need to qualify index names with the schema name?
int	registerResultSetOutParameter(CallableStatement statement, int col) Registers an OUT parameter which will be returing a ResultSet.
boolean	supportsCurrentTimestampSelection() Does this dialect support a way to retrieve the database's current timestamp value?
boolean	supportsEmptyInList() Does this dialect support empty IN lists? For example, is [where XYZ in ()] a supported construct?
boolean	supportsExistsInSelect() Does the dialect support an exists statement in the select clause?
boolean	supportsIdentityColumns() Does this dialect support identity column key generation?
boolean	supportsInsertSelectIdentity() Does the dialect support some form of inserting and selecting the generated IDENTITY value all in the same statement.
boolean	supportsTemporaryTables() Does this dialect support temporary tables?

Methods inherited from class org.hibernate.dialect.Dialect

areStringComparisonsCaseInsensitive, bindLimitParametersFirst, bindLimitParametersInReverseOrder, buildSQLExceptionConverter, closeQuote, createCaseFragment, createOuterJoinFragment, dropConstraints, forUpdateOfColumns, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getCascadeConstraintsString, getCastTypeName, getColumnComment, getCreateMultisetTableString, getCreateSequenceString, getCreateSequenceString, getCreateSequenceStrings, getCreateSequenceStrings, getCreateTableString, getCreateTemporaryTablePostfix, getCreateTemporaryTableString, getCurrentTimestampSQLFunctionName, getDefaultProperties, getDialect, getDialect, getDropForeignKeyString, getDropSequenceString, getDropSequenceStrings, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIdentityColumnString, getIdentityInsertString, getIdentitySelectString, getKeywords, getLimitString, getLimitString, getLockingStrategy, getLowercaseFunction, getMaxAliasLength, getNativeIdentifierGeneratorClass, getNoColumnsInsertString, getQuerySequencesString, getSelectClauseNullString, getSelectGUIDString, getSelectSequenceNextValString, getSequenceNextValString, getTableComment, getTableTypeString, getTypeName, getTypeName, getViolatedConstraintNameExtracter, hasAlterTable, hasDataTypeInIdentityColumn, hasSelfReferentialForeignKeyBug, openQuote, performTemporaryTableDDLInIsolation, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, supportsBindAsCallableArgument, supportsCascadeDelete, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsCommentOn, supportsExpectedLobUsagePattern, supportsIfExistsAfterTableName, supportsIfExistsBeforeTableName, supportsLimit, supportsLimitOffset, supportsLobValueChangePropogation, supportsNotNullUnique, supportsOuterJoinForUpdate, supportsParametersInInsertSelect, supportsPooledSequences, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsRowValueConstructorSyntax, supportsRowValueConstructorSyntaxInInList, supportsSequences, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsUnboundedLobLocatorMaterialization, supportsUnionAll, supportsUnique, supportsUniqueConstraintInCreateAlterTable, supportsVariableLimit, toBooleanValueString, toString, transformSelectString, useInputStreamToInsertBlob, useMaxForLimit

Methods inherited from class java.lang.Object

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

Constructor Detail

SybaseDialect

public SybaseDialect()

Method Detail

getAddColumnString

public String getAddColumnString()

Description copied from class: Dialect

The syntax used to add a column to a table (optional).

Overrides:

getAddColumnString in class Dialect

Returns:

The "add column" fragment.

getNullColumnString

public String getNullColumnString()

Description copied from class: Dialect

The keyword used to specify a nullable column.

Overrides:

getNullColumnString in class Dialect

Returns:

String

qualifyIndexName

public boolean qualifyIndexName()

Description copied from class: Dialect

Do we need to qualify index names with the schema name?

Overrides:

qualifyIndexName in class Dialect

Returns:

boolean

getForUpdateString

public String getForUpdateString()

Description copied from class: Dialect

Get the string to append to SELECT statements to acquire locks for this dialect.

Overrides:

getForUpdateString in class Dialect

Returns:

The appropriate FOR UPDATE clause string.

supportsIdentityColumns

public boolean supportsIdentityColumns()

Description copied from class: Dialect

Does this dialect support identity column key generation?

Overrides:

supportsIdentityColumns in class Dialect

Returns:

True if IDENTITY columns are supported; false otherwise.

getIdentitySelectString

public String getIdentitySelectString()

Description copied from class: Dialect

Get the select command to use to retrieve the last generated IDENTITY value.

Overrides:

getIdentitySelectString in class Dialect

Returns:

The appropriate select command

getIdentityColumnString

public String getIdentityColumnString()

Description copied from class: Dialect

The syntax used during DDL to define a column as being an IDENTITY.

Overrides:

getIdentityColumnString in class Dialect

Returns:

The appropriate DDL fragment.

supportsInsertSelectIdentity

public boolean supportsInsertSelectIdentity()

Description copied from class: Dialect

Does the dialect support some form of inserting and selecting the generated IDENTITY value all in the same statement.

Overrides:

supportsInsertSelectIdentity in class Dialect

Returns:

True if the dialect supports selecting the just generated IDENTITY in the insert statement.

appendIdentitySelectToInsert

public String appendIdentitySelectToInsert(String insertSQL)

Description copied from class: Dialect

Provided we Dialect.supportsInsertSelectIdentity(), then attch the "select identity" clause to the insert statement.

Note, if Dialect.supportsInsertSelectIdentity() == false then the insert-string should be returned without modification.

Overrides:

appendIdentitySelectToInsert in class Dialect

Parameters:

insertSQL - The insert command

Returns:

The insert command with any necessary identity select clause attached.

appendLockHint

public String appendLockHint(LockMode mode,
                             String tableName)

Description copied from class: Dialect

Some dialects support an alternative means to SELECT FOR UPDATE, whereby a "lock hint" is appends to the table name in the from clause.

contributed by Helge Schulz

Overrides:

appendLockHint in class Dialect

Parameters:

mode - The lock mode to apply

tableName - The name of the table to which to apply the lock hint.

Returns:

The table with any required lock hints.

applyLocksToSql

public String applyLocksToSql(String sql,
                              Map aliasedLockModes,
                              Map keyColumnNames)

Description copied from class: Dialect

Modifies the given SQL by applying the appropriate updates for the specified lock modes and key columns.

The behavior here is that of an ANSI SQL SELECT FOR UPDATE. This method is really intended to allow dialects which do not support SELECT FOR UPDATE to achieve this in their own fashion.

Overrides:

applyLocksToSql in class Dialect

Parameters:

sql - the SQL string to modify

aliasedLockModes - a map of lock modes indexed by aliased table names.

keyColumnNames - a map of key columns indexed by aliased table names.

Returns:

the modified SQL string.

registerResultSetOutParameter

public int registerResultSetOutParameter(CallableStatement statement,
                                         int col)
                                  throws SQLException

Description copied from class: Dialect

Registers an OUT parameter which will be returing a ResultSet. How this is accomplished varies greatly from DB to DB, hence its inclusion (along with Dialect.getResultSet(java.sql.CallableStatement)) here.

Overrides:

registerResultSetOutParameter in class Dialect

Parameters:

statement - The callable statement.

col - The bind position at which to register the OUT param.

Returns:

The number of (contiguous) bind positions used.

Throws:

SQLException - Indicates problems registering the OUT param.

getResultSet

public ResultSet getResultSet(CallableStatement ps)
                       throws SQLException

Description copied from class: Dialect

Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the OUT parameter.

Overrides:

getResultSet in class Dialect

Parameters:

ps - The callable statement.

Returns:

The extracted result set.

Throws:

SQLException - Indicates problems extracting the result set.

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 class Dialect

Returns:

True if the current timestamp can be retrieved; false otherwise.

isCurrentTimestampSelectStringCallable

public boolean isCurrentTimestampSelectStringCallable()

Description copied from class: Dialect

Should the value returned by Dialect.getCurrentTimestampSelectString() be treated as callable. Typically this indicates that JDBC escape sytnax is being used...

Overrides:

isCurrentTimestampSelectStringCallable in class Dialect

Returns:

True if the Dialect.getCurrentTimestampSelectString() return is callable; false otherwise.

getCurrentTimestampSelectString

public String getCurrentTimestampSelectString()

Description copied from class: Dialect

Retrieve the command used to retrieve the current timestammp from the database.

Overrides:

getCurrentTimestampSelectString in class Dialect

Returns:

The command.

supportsTemporaryTables

public boolean supportsTemporaryTables()

Description copied from class: Dialect

Does this dialect support temporary tables?

Overrides:

supportsTemporaryTables in class Dialect

Returns:

True if temp tables are supported; false otherwise.

generateTemporaryTableName

public String generateTemporaryTableName(String baseTableName)

Description copied from class: Dialect

Generate a temporary table name given the bas table.

Overrides:

generateTemporaryTableName in class Dialect

Parameters:

baseTableName - The table name from which to base the temp table name.

Returns:

The generated temp table name.

dropTemporaryTableAfterUse

public boolean dropTemporaryTableAfterUse()

Description copied from class: Dialect

Do we need to drop the temporary table after use?

Overrides:

dropTemporaryTableAfterUse in class Dialect

Returns:

True if the table should be dropped.

supportsEmptyInList

public boolean supportsEmptyInList()

Description copied from class: Dialect

Does this dialect support empty IN lists?

For example, is [where XYZ in ()] a supported construct?

Overrides:

supportsEmptyInList in class Dialect

Returns:

True if empty in lists are supported; false otherwise.

supportsExistsInSelect

public boolean supportsExistsInSelect()

Description copied from class: Dialect

Does the dialect support an exists statement in the select clause?

Overrides:

supportsExistsInSelect in class Dialect

Returns:

True if exists checks are allowed in the select clause; false otherwise.

doesReadCommittedCauseWritersToBlockReaders

public boolean doesReadCommittedCauseWritersToBlockReaders()

Description copied from class: Dialect

For the underlying database, is READ_COMMITTED isolation implemented by forcing readers to wait for write locks to be released?

Overrides:

doesReadCommittedCauseWritersToBlockReaders in class Dialect

Returns:

True if writers block readers to achieve READ_COMMITTED; false otherwise.

doesRepeatableReadCauseReadersToBlockWriters

public boolean doesRepeatableReadCauseReadersToBlockWriters()

Description copied from class: Dialect

For the underlying database, is REPEATABLE_READ isolation implemented by forcing writers to wait for read locks to be released?

Overrides:

doesRepeatableReadCauseReadersToBlockWriters in class Dialect

Returns:

True if readers block writers to achieve REPEATABLE_READ; false otherwise.