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java.lang.Object org.hibernate.dialect.Dialect org.hibernate.dialect.SQLServerDialect
public class SQLServerDialect
A dialect for Microsoft SQL Server 2000
Field Summary |
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Fields inherited from class org.hibernate.dialect.Dialect |
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CLOSED_QUOTE, DEFAULT_BATCH_SIZE, NO_BATCH, QUOTE |
Constructor Summary | |
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SQLServerDialect()
|
Method Summary | |
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String |
appendIdentitySelectToInsert(String insertSQL)
Use insert table(...) values(...) select SCOPE_IDENTITY() |
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,
LockOptions aliasedLockOptions,
Map keyColumnNames)
Modifies the given SQL by applying the appropriate updates for the specified lock modes and key columns. |
boolean |
areStringComparisonsCaseInsensitive()
Are string comparisons implicitly case insensitive. |
char |
closeQuote()
The character specific to this dialect used to close a quoted identifier. |
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 base table. |
String |
getAddColumnString()
The syntax used to add a column to a table (optional). |
String |
getCurrentTimestampSelectString()
Retrieve the command used to retrieve the current timestamp 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 |
getLimitString(String querySelect,
int offset,
int limit)
Given a limit and an offset, apply the limit clause to the query. |
String |
getNoColumnsInsertString()
The fragment used to insert a row without specifying any column values. |
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. |
String |
getSelectGUIDString()
Get the command used to select a GUID from the underlying database. |
boolean |
isCurrentTimestampSelectStringCallable()
Should the value returned by Dialect.getCurrentTimestampSelectString()
be treated as callable. |
char |
openQuote()
The character specific to this dialect used to begin a quoted identifier. |
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 . |
boolean |
supportsCircularCascadeDeleteConstraints()
Does this dialect support definition of cascade delete constraints which can cause circular chains? |
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 |
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 |
supportsLobValueChangePropogation()
Does the dialect support propagating changes to LOB values back to the database? Talking about mutating the internal value of the locator as opposed to supplying a new locator instance... |
boolean |
supportsResultSetPositionQueryMethodsOnForwardOnlyCursor()
Does this dialect support asking the result set its positioning information on forward only cursors. |
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? |
boolean |
useMaxForLimit()
Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows? This is easiest understood via an example. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public SQLServerDialect()
Method Detail |
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public String getNoColumnsInsertString()
Dialect
getNoColumnsInsertString
in class Dialect
public String getLimitString(String querySelect, int offset, int limit)
Dialect
getLimitString
in class Dialect
querySelect
- The query to which to apply the limit.offset
- The offset of the limitlimit
- The limit of the limit ;)
public String appendIdentitySelectToInsert(String insertSQL)
insertSQL
- The insert command
public boolean supportsLimit()
Dialect
supportsLimit
in class Dialect
public boolean useMaxForLimit()
Dialect
useMaxForLimit
in class Dialect
public boolean supportsLimitOffset()
Dialect
supportsLimitOffset
in class Dialect
public boolean supportsVariableLimit()
Dialect
supportsVariableLimit
in class Dialect
public char closeQuote()
Dialect
closeQuote
in class Dialect
public char openQuote()
Dialect
openQuote
in class Dialect
public String appendLockHint(LockMode mode, String tableName)
Dialect
mode
- The lock mode to applytableName
- The name of the table to which to apply the lock hint.
public String getCurrentTimestampSelectString()
Dialect
public boolean areStringComparisonsCaseInsensitive()
Dialect
areStringComparisonsCaseInsensitive
in class Dialect
public boolean supportsResultSetPositionQueryMethodsOnForwardOnlyCursor()
Dialect
ResultSet.isAfterLast()
and
ResultSet.isBeforeFirst()
. Certain drivers do not
allow access to these methods for forward only cursors.
NOTE : this is highly driver dependent!
supportsResultSetPositionQueryMethodsOnForwardOnlyCursor
in class Dialect
ResultSet.isAfterLast()
and
ResultSet.isBeforeFirst()
are supported for forward
only cursors; false otherwise.public boolean supportsCircularCascadeDeleteConstraints()
Dialect
supportsCircularCascadeDeleteConstraints
in class Dialect
public boolean supportsLobValueChangePropogation()
Dialect
Blob.setBinaryStream(long)
,
Blob.setBytes(long, byte[])
,
Blob.setBytes(long, byte[], int, int)
,
or Blob.truncate(long)
.
For CLOBs, the internal value might be changed by:
Clob.setAsciiStream(long)
,
Clob.setCharacterStream(long)
,
Clob.setString(long, String)
,
Clob.setString(long, String, int, int)
,
or Clob.truncate(long)
.
NOTE : I do not know the correct answer currently for
databases which (1) are not part of the cruise control process
or (2) do not Dialect.supportsExpectedLobUsagePattern()
.
supportsLobValueChangePropogation
in class Dialect
public boolean doesReadCommittedCauseWritersToBlockReaders()
Dialect
public boolean doesRepeatableReadCauseReadersToBlockWriters()
Dialect
public String getAddColumnString()
Dialect
getAddColumnString
in class Dialect
public String getNullColumnString()
Dialect
getNullColumnString
in class Dialect
public boolean qualifyIndexName()
Dialect
qualifyIndexName
in class Dialect
public String getForUpdateString()
Dialect
getForUpdateString
in class Dialect
public boolean supportsIdentityColumns()
Dialect
supportsIdentityColumns
in class Dialect
public String getIdentitySelectString()
Dialect
getIdentitySelectString
in class Dialect
public String getIdentityColumnString()
Dialect
getIdentityColumnString
in class Dialect
public boolean supportsInsertSelectIdentity()
Dialect
supportsInsertSelectIdentity
in class Dialect
public String applyLocksToSql(String sql, LockOptions aliasedLockOptions, Map keyColumnNames)
Dialect
applyLocksToSql
in class Dialect
sql
- the SQL string to modifyaliasedLockOptions
- lock options indexed by aliased table names.keyColumnNames
- a map of key columns indexed by aliased table names.
public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException
Dialect
ResultSet
. How this is accomplished varies greatly
from DB to DB, hence its inclusion (along with Dialect.getResultSet(java.sql.CallableStatement)
) here.
registerResultSetOutParameter
in class Dialect
statement
- The callable statement.col
- The bind position at which to register the OUT param.
SQLException
- Indicates problems registering the OUT param.public ResultSet getResultSet(CallableStatement ps) throws SQLException
Dialect
Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int)
,
extract the ResultSet
from the OUT parameter.
getResultSet
in class Dialect
ps
- The callable statement.
SQLException
- Indicates problems extracting the result set.public boolean supportsCurrentTimestampSelection()
Dialect
supportsCurrentTimestampSelection
in class Dialect
public boolean isCurrentTimestampSelectStringCallable()
Dialect
Dialect.getCurrentTimestampSelectString()
be treated as callable. Typically this indicates that JDBC escape
syntax is being used...
isCurrentTimestampSelectStringCallable
in class Dialect
Dialect.getCurrentTimestampSelectString()
return
is callable; false otherwise.public boolean supportsTemporaryTables()
Dialect
supportsTemporaryTables
in class Dialect
public String generateTemporaryTableName(String baseTableName)
Dialect
generateTemporaryTableName
in class Dialect
baseTableName
- The table name from which to base the temp table name.
public boolean dropTemporaryTableAfterUse()
Dialect
dropTemporaryTableAfterUse
in class Dialect
public String getSelectGUIDString()
Dialect
getSelectGUIDString
in class Dialect
public boolean supportsEmptyInList()
Dialect
supportsEmptyInList
in class Dialect
public boolean supportsUnionAll()
Dialect
supportsUnionAll
in class Dialect
public boolean supportsExistsInSelect()
Dialect
supportsExistsInSelect
in class Dialect
public boolean supportsTupleDistinctCounts()
Dialect
supportsTupleDistinctCounts
in class Dialect
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