org.hibernate.dialect
Class SQLServer2005Dialect

java.lang.Object
  org.hibernate.dialect.Dialect
      org.hibernate.dialect.SQLServerDialect
          org.hibernate.dialect.SQLServer2005Dialect

Direct Known Subclasses:

SQLServer2008Dialect

public class SQLServer2005Dialect
extends SQLServerDialect

A dialect for Microsoft SQL 2005. (HHH-3936 fix)

Author:

Yoryos Valotasios

Field Summary

Fields inherited from class org.hibernate.dialect.Dialect

CLOSED_QUOTE, DEFAULT_BATCH_SIZE, NO_BATCH, QUOTE

Constructor Summary

SQLServer2005Dialect()

Method Summary

String	applyLocksToSql(String sql, LockOptions aliasedLockOptions, Map keyColumnNames) Modifies the given SQL by applying the appropriate updates for the specified lock modes and key columns.
boolean	bindLimitParametersFirst() Does the LIMIT clause come at the start of the SELECT statement, rather than at the end?
int	convertToFirstRowValue(int zeroBasedFirstResult) Hibernate APIs explicitly state that setFirstResult() should be a zero-based offset.
boolean	dropTemporaryTableAfterUse() Do we need to drop the temporary table after use?
String	generateTemporaryTableName(String baseTableName) Generate a temporary table name given the base table.
String	getAddColumnString() The syntax used to add a column to a table (optional).
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	getLimitString(String querySqlString, boolean hasOffset) Add a LIMIT clause to the given SQL SELECT (HHH-2655: ROW_NUMBER for Paging) The LIMIT SQL will look like:
String	getLimitString(String query, int offset, int limit) Given a limit and an offset, apply the limit clause to the query.
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.
protected static CharSequence	getSelectFieldsWithoutAliases(StringBuilder sql) This utility method searches the given sql query for the fields of the select statement and returns them without the aliases.
String	getSelectGUIDString() Get the command used to select a GUID from the underlying database.
protected static void	insertRowNumberFunction(StringBuilder sql, CharSequence orderby) Right after the select statement of a given query we must place the row_number function
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 returning a ResultSet.
protected static void	replaceDistinctWithGroupBy(StringBuilder sql) Utility method that checks if the given sql query is a select distinct one and if so replaces the distinct select with an equivalent simple select with a group by clause.
protected static String	stripAliases(String str) Utility method that strips the aliases.
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	supportsLimitOffset() Does this dialect's LIMIT support (if any) additionally support specifying an offset?
boolean	supportsTemporaryTables() Does this dialect support temporary tables?
boolean	supportsTupleDistinctCounts() Does this dialect support `count(distinct a,b)`?
boolean	supportsUnionAll() Does this dialect support UNION ALL, which is generally a faster variant of UNION?
boolean	supportsVariableLimit() Does this dialect support bind variables (i.e., prepared statement parameters) for its limit/offset?

Methods inherited from class org.hibernate.dialect.SQLServerDialect

appendIdentitySelectToInsert, appendLockHint, areStringComparisonsCaseInsensitive, closeQuote, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, getCurrentTimestampSelectString, getNoColumnsInsertString, openQuote, supportsCircularCascadeDeleteConstraints, supportsLimit, supportsLobValueChangePropogation, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, useMaxForLimit

Methods inherited from class org.hibernate.dialect.Dialect

addTypeOverride, bindLimitParametersInReverseOrder, buildSQLExceptionConverter, createCaseFragment, createOuterJoinFragment, dropConstraints, forceLimitUsage, forUpdateOfColumns, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getCascadeConstraintsString, getCastTypeName, getColumnAliasExtractor, getColumnComment, getCreateMultisetTableString, getCreateSequenceString, getCreateSequenceString, getCreateSequenceStrings, getCreateSequenceStrings, getCreateTableString, getCreateTemporaryTablePostfix, getCreateTemporaryTableString, getCrossJoinSeparator, getCurrentTimestampSQLFunctionName, getDefaultProperties, getDialect, getDialect, getDropForeignKeyString, getDropSequenceString, getDropSequenceStrings, getDropTemporaryTableString, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateString, getForUpdateString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIdentityColumnString, getIdentityInsertString, getIdentitySelectString, getKeywords, getLockingStrategy, getLowercaseFunction, getMaxAliasLength, getNativeIdentifierGeneratorClass, getQuerySequencesString, getReadLockString, getSelectClauseNullString, getSelectSequenceNextValString, getSequenceNextValString, getTableComment, getTableTypeString, getTypeName, getTypeName, getTypeOverrides, getViolatedConstraintNameExtracter, getWriteLockString, hasAlterTable, hasDataTypeInIdentityColumn, hasSelfReferentialForeignKeyBug, isLockTimeoutParameterized, performTemporaryTableDDLInIsolation, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, replaceResultVariableInOrderByClauseWithPosition, requiresCastingOfParametersInSelectClause, supportsBindAsCallableArgument, supportsCascadeDelete, supportsColumnCheck, supportsCommentOn, supportsExpectedLobUsagePattern, supportsIfExistsAfterTableName, supportsIfExistsBeforeTableName, supportsLockTimeouts, supportsNotNullUnique, supportsOuterJoinForUpdate, supportsParametersInInsertSelect, supportsPooledSequences, supportsRowValueConstructorSyntax, supportsRowValueConstructorSyntaxInInList, supportsSequences, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTupleCounts, supportsUnboundedLobLocatorMaterialization, supportsUnique, supportsUniqueConstraintInCreateAlterTable, toBooleanValueString, toString, transformSelectString, useInputStreamToInsertBlob

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLServer2005Dialect

public SQLServer2005Dialect()

Method Detail

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 class SQLServerDialect

Returns:

True if the dialect supports an offset within the limit support.

bindLimitParametersFirst

public boolean bindLimitParametersFirst()

Description copied from class: Dialect

Does the LIMIT clause come at the start of the SELECT statement, rather than at the end?

Overrides:

bindLimitParametersFirst in class Dialect

Returns:

true if limit parameters should come before other parameters

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 class SQLServerDialect

Returns:

True if bind variables can be used; false otherwise.

convertToFirstRowValue

public int convertToFirstRowValue(int zeroBasedFirstResult)

Description copied from class: Dialect

Hibernate APIs explicitly state that setFirstResult() should be a zero-based offset. Here we allow the Dialect a chance to convert that value based on what the underlying db or driver will expect.

NOTE: what gets passed into Dialect.getLimitString(String,int,int) is the zero-based offset. Dialects which do not Dialect.supportsVariableLimit() should take care to perform any needed Dialect.convertToFirstRowValue(int) calls prior to injecting the limit values into the SQL string.

Overrides:

convertToFirstRowValue in class Dialect

Parameters:

zeroBasedFirstResult - The user-supplied, zero-based first row offset.

Returns:

The corresponding db/dialect specific offset.

See Also:

Query.setFirstResult(int), Criteria.setFirstResult(int)

getLimitString

public String getLimitString(String query,
                             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 class SQLServerDialect

Parameters:

query - The query to which to apply the limit.

offset - The offset of the limit

limit - The limit of the limit ;)

Returns:

The modified query statement with the limit applied.

getLimitString

public String getLimitString(String querySqlString,
                             boolean hasOffset)

Add a LIMIT clause to the given SQL SELECT (HHH-2655: ROW_NUMBER for Paging) The LIMIT SQL will look like:

 WITH query AS (
   SELECT ROW_NUMBER() OVER (ORDER BY orderby) as __hibernate_row_nr__, 
   original_query_without_orderby
 )
 SELECT * FROM query WHERE __hibernate_row_nr__ BEETWIN offset AND offset + last
 

Overrides:

getLimitString in class Dialect

Parameters:

querySqlString - The SQL statement to base the limit query off of.

offset - Offset of the first row to be returned by the query (zero-based)

limit - Maximum number of rows to be returned by the query

Returns:

A new SQL statement with the LIMIT clause applied.

replaceDistinctWithGroupBy

protected static void replaceDistinctWithGroupBy(StringBuilder sql)

Utility method that checks if the given sql query is a select distinct one and if so replaces the distinct select with an equivalent simple select with a group by clause. See SQLServer2005DialectTestCase#testReplaceDistinctWithGroupBy()

Parameters:

sql - an sql query

getSelectFieldsWithoutAliases

protected static CharSequence getSelectFieldsWithoutAliases(StringBuilder sql)

This utility method searches the given sql query for the fields of the select statement and returns them without the aliases. See SQLServer2005DialectTestCase#testGetSelectFieldsWithoutAliases()

Parameters:

an - sql query

Returns:

the fields of the select statement without their alias

stripAliases

protected static String stripAliases(String str)

Utility method that strips the aliases. See SQLServer2005DialectTestCase#testStripAliases()

Parameters:

a - string to replace the as statements

Returns:

a string without the as statements

insertRowNumberFunction

protected static void insertRowNumberFunction(StringBuilder sql,
                                              CharSequence orderby)

Right after the select statement of a given query we must place the row_number function

Parameters:

sql - the initial sql query without the order by clause

orderby - the order by clause of the query

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.

applyLocksToSql

public String applyLocksToSql(String sql,
                              LockOptions aliasedLockOptions,
                              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

aliasedLockOptions - lock options 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 returning 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 syntax is being used...

Overrides:

isCurrentTimestampSelectStringCallable in class Dialect

Returns:

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

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 base 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.

getSelectGUIDString

public String getSelectGUIDString()

Description copied from class: Dialect

Get the command used to select a GUID from the underlying database.

Optional operation.

Overrides:

getSelectGUIDString in class Dialect

Returns:

The appropriate command.

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.

supportsUnionAll

public boolean supportsUnionAll()

Description copied from class: Dialect

Does this dialect support UNION ALL, which is generally a faster variant of UNION?

Overrides:

supportsUnionAll in class Dialect

Returns:

True if UNION ALL is 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.

supportsTupleDistinctCounts

public boolean supportsTupleDistinctCounts()

Description copied from class: Dialect

Does this dialect support `count(distinct a,b)`?

Overrides:

supportsTupleDistinctCounts in class Dialect

Returns:

True if the database supports counting disintct tuples; false otherwise.