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hibernate-orm
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HHH-6815: Overrode SQLServerDialect.getSqlTypeDescriptorOverride(int) to return a SmallIntTypeDescriptor instead when the datatype being updated is a TINYINT

This commit is contained in:
John Verhaeg 2011-11-09 12:52:51 -06:00
parent 8bb51c7acb
commit 25e8a43d81
1 changed files with 46 additions and 18 deletions
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64
hibernate-core/src/main/java/org/hibernate/dialect/SQLServerDialect.java
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@ -29,6 +29,8 @@ import org.hibernate.dialect.function.AnsiTrimEmulationFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.descriptor.sql.SmallIntTypeDescriptor;
import org.hibernate.type.descriptor.sql.SqlTypeDescriptor;
/**
* A dialect for Microsoft SQL Server 2000
@ -57,7 +59,8 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
registerKeyword( "top" );
}
public String getNoColumnsInsertString() {
@Override
public String getNoColumnsInsertString() {
return "default values";
}
@ -67,7 +70,8 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
return selectIndex + ( selectDistinctIndex == selectIndex ? 15 : 6 );
}
public String getLimitString(String querySelect, int offset, int limit) {
@Override
public String getLimitString(String querySelect, int offset, int limit) {
if ( offset > 0 ) {
throw new UnsupportedOperationException( "query result offset is not supported" );
}
@ -80,38 +84,46 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
/**
* Use <tt>insert table(...) values(...) select SCOPE_IDENTITY()</tt>
*/
public String appendIdentitySelectToInsert(String insertSQL) {
@Override
public String appendIdentitySelectToInsert(String insertSQL) {
return insertSQL + " select scope_identity()";
}
public boolean supportsLimit() {
@Override
public boolean supportsLimit() {
return true;
}
public boolean useMaxForLimit() {
@Override
public boolean useMaxForLimit() {
return true;
}
public boolean supportsLimitOffset() {
@Override
public boolean supportsLimitOffset() {
return false;
}
public boolean supportsVariableLimit() {
@Override
public boolean supportsVariableLimit() {
return false;
}
public char closeQuote() {
@Override
public char closeQuote() {
return ']';
}
public char openQuote() {
@Override
public char openQuote() {
return '[';
}
public String appendLockHint(LockMode mode, String tableName) {
@Override
public String appendLockHint(LockMode mode, String tableName) {
if ( ( mode == LockMode.UPGRADE ) ||
( mode == LockMode.UPGRADE_NOWAIT ) ||
( mode == LockMode.PESSIMISTIC_WRITE ) ||
( mode == LockMode.PESSIMISTIC_WRITE ) ||
( mode == LockMode.WRITE ) ) {
return tableName + " with (updlock, rowlock)";
}
@ -125,39 +137,55 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
// The current_timestamp is more accurate, but only known to be supported
// in SQL Server 7.0 and later (i.e., Sybase not known to support it at all)
public String getCurrentTimestampSelectString() {
@Override
public String getCurrentTimestampSelectString() {
return "select current_timestamp";
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean areStringComparisonsCaseInsensitive() {
@Override
public boolean areStringComparisonsCaseInsensitive() {
return true;
}
public boolean supportsResultSetPositionQueryMethodsOnForwardOnlyCursor() {
@Override
public boolean supportsResultSetPositionQueryMethodsOnForwardOnlyCursor() {
return false;
}
public boolean supportsCircularCascadeDeleteConstraints() {
@Override
public boolean supportsCircularCascadeDeleteConstraints() {
// SQL Server (at least up through 2005) does not support defining
// cascade delete constraints which can circle back to the mutating
// table
return false;
}
public boolean supportsLobValueChangePropogation() {
@Override
public boolean supportsLobValueChangePropogation() {
// note: at least my local SQL Server 2005 Express shows this not working...
return false;
}
public boolean doesReadCommittedCauseWritersToBlockReaders() {
@Override
public boolean doesReadCommittedCauseWritersToBlockReaders() {
return false; // here assume SQLServer2005 using snapshot isolation, which does not have this problem
}
public boolean doesRepeatableReadCauseReadersToBlockWriters() {
@Override
public boolean doesRepeatableReadCauseReadersToBlockWriters() {
return false; // here assume SQLServer2005 using snapshot isolation, which does not have this problem
}
/**
* {@inheritDoc}
*
* @see org.hibernate.dialect.Dialect#getSqlTypeDescriptorOverride(int)
*/
@Override
protected SqlTypeDescriptor getSqlTypeDescriptorOverride( int sqlCode ) {
return sqlCode == Types.TINYINT ? SmallIntTypeDescriptor.INSTANCE : super.getSqlTypeDescriptorOverride(sqlCode);
}
}