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HHH-5244 - Flesh out H2Dialect temp table support

This commit is contained in:
Steve Ebersole 2011-04-06 12:28:00 -05:00
parent 154675d322
commit 7b4998d1ce
2 changed files with 27 additions and 10 deletions
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4
hibernate-core/src/main/java/org/hibernate/HibernateLogger.java
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@ -1862,4 +1862,8 @@ public interface HibernateLogger extends BasicLogger {
@LogMessage( level = WARN )
@Message( value = "The DerbyDialect dialect has been deprecated; use one of the version-specific dialects instead", id = 430 )
void deprecatedDerbyDialect();
@LogMessage( level = WARN )
@Message( value = "Unable to determine H2 database version, certain features may not work", id = 431 )
void undeterminedH2Version();
}

33
hibernate-core/src/main/java/org/hibernate/dialect/H2Dialect.java
View File

@ -46,29 +46,33 @@ public class H2Dialect extends Dialect {
private static final HibernateLogger LOG = Logger.getMessageLogger(HibernateLogger.class, H2Dialect.class.getName());
private String querySequenceString;
private final String querySequenceString;
public H2Dialect() {
super();
querySequenceString = "select sequence_name from information_schema.sequences";
String querySequenceString = "select sequence_name from information_schema.sequences";
try {
// HHH-2300
final Class constants = ReflectHelper.classForName( "org.h2.engine.Constants" );
final int majorVersion = ( Integer ) constants.getDeclaredField( "VERSION_MAJOR" ).get( null );
final int minorVersion = ( Integer ) constants.getDeclaredField( "VERSION_MINOR" ).get( null );
final int buildId = ( Integer ) constants.getDeclaredField( "BUILD_ID" ).get( null );
final Class h2ConstantsClass = ReflectHelper.classForName( "org.h2.engine.Constants" );
final int majorVersion = ( Integer ) h2ConstantsClass.getDeclaredField( "VERSION_MAJOR" ).get( null );
final int minorVersion = ( Integer ) h2ConstantsClass.getDeclaredField( "VERSION_MINOR" ).get( null );
final int buildId = ( Integer ) h2ConstantsClass.getDeclaredField( "BUILD_ID" ).get( null );
if ( buildId < 32 ) {
querySequenceString = "select name from information_schema.sequences";
}
if (!(majorVersion > 1 || minorVersion > 2 || buildId >= 139)) LOG.unsupportedMultiTableBulkHqlJpaql(majorVersion,
minorVersion,
buildId);
if ( ! ( majorVersion > 1 || minorVersion > 2 || buildId >= 139 ) ) {
LOG.unsupportedMultiTableBulkHqlJpaql( majorVersion, minorVersion, buildId );
}
}
catch ( Exception e ) {
// ignore (probably H2 not in the classpath)
// probably H2 not in the classpath, though in certain app server environments it might just mean we are
// not using the correct classloader
LOG.undeterminedH2Version();
}
this.querySequenceString = querySequenceString;
registerColumnType( Types.BOOLEAN, "boolean" );
registerColumnType( Types.BIGINT, "bigint" );
registerColumnType( Types.BINARY, "binary" );
@ -297,8 +301,17 @@ public class H2Dialect extends Dialect {
return "create local temporary table if not exists";
}
@Override
public String getCreateTemporaryTablePostfix() {
// actually 2 different options are specified here:
// 1) [on commit drop] - says to drop the table on transaction commit
// 2) [transactional] - says to not perform an implicit commit of any current transaction
return "on commit drop transactional";
}
@Override
public Boolean performTemporaryTableDDLInIsolation() {
// explicitly create the table using the same connection and transaction
return Boolean.FALSE;
}