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hibernate-orm
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HHH-16651 use single id loader when there is one id in the batch

This commit is contained in:
Gavin 2023-05-21 23:06:00 +02:00 committed by Gavin King
parent 97b653aaec
commit 475aefb434
3 changed files with 39 additions and 11 deletions
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23
hibernate-core/src/main/java/org/hibernate/loader/ast/internal/CollectionBatchLoaderArrayParam.java
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@ -7,7 +7,6 @@
package org.hibernate.loader.ast.internal;
import java.lang.reflect.Array;
import java.util.Collections;
import org.hibernate.LockOptions;
import org.hibernate.collection.spi.PersistentCollection;
@ -33,6 +32,8 @@ import org.hibernate.sql.results.internal.RowTransformerStandardImpl;
import org.hibernate.sql.results.spi.ListResultsConsumer;
import org.hibernate.type.BasicType;
import static java.util.Collections.singletonList;
import static org.hibernate.loader.ast.internal.MultiKeyLoadHelper.hasSingleId;
import static org.hibernate.loader.ast.internal.MultiKeyLoadLogging.MULTI_KEY_LOAD_DEBUG_ENABLED;
import static org.hibernate.loader.ast.internal.MultiKeyLoadLogging.MULTI_KEY_LOAD_LOGGER;
@ -49,6 +50,7 @@ public class CollectionBatchLoaderArrayParam
private final JdbcParameter jdbcParameter;
private final SelectStatement sqlSelect;
private final JdbcOperationQuerySelect jdbcSelectOperation;
private final CollectionLoaderSingleKey singleKeyLoader;
public CollectionBatchLoaderArrayParam(
int domainBatchSize,
@ -68,7 +70,7 @@ public class CollectionBatchLoaderArrayParam
final SimpleForeignKeyDescriptor keyDescriptor = (SimpleForeignKeyDescriptor) getLoadable().getKeyDescriptor();
arrayElementType = keyDescriptor.getJavaType().getJavaTypeClass();
Class<?> arrayClass = Array.newInstance( arrayElementType, 0 ).getClass();
final Class<?> arrayClass = Array.newInstance( arrayElementType, 0 ).getClass();
final BasicType<?> arrayBasicType = getSessionFactory().getTypeConfiguration()
.getBasicTypeRegistry()
@ -95,6 +97,8 @@ public class CollectionBatchLoaderArrayParam
.getSqlAstTranslatorFactory()
.buildSelectTranslator( getSessionFactory(), sqlSelect )
.translate( JdbcParameterBindings.NO_BINDINGS, QueryOptions.NONE );
singleKeyLoader = new CollectionLoaderSingleKey( attributeMapping, loadQueryInfluencers, sessionFactory );
}
@Override
@ -103,13 +107,14 @@ public class CollectionBatchLoaderArrayParam
MULTI_KEY_LOAD_LOGGER.debugf( "Batch loading entity `%s#%s`", getLoadable().getNavigableRole().getFullPath(), key );
}
final Object[] keysToInitialize = resolveKeysToInitialize( key, session );
initializeKeys( keysToInitialize, session );
final Object[] keys = resolveKeysToInitialize( key, session );
for ( int i = 0; i < keysToInitialize.length; i++ ) {
finishInitializingKey( keysToInitialize[i], session );
if ( hasSingleId( keys ) ) {
return singleKeyLoader.load( key, session );
}
initializeKeys( keys, session );
final CollectionKey collectionKey = new CollectionKey( getLoadable().getCollectionDescriptor(), key );
return session.getPersistenceContext().getCollection( collectionKey );
}
@ -138,7 +143,7 @@ public class CollectionBatchLoaderArrayParam
final SubselectFetch.RegistrationHandler subSelectFetchableKeysHandler = SubselectFetch.createRegistrationHandler(
session.getPersistenceContext().getBatchFetchQueue(),
sqlSelect,
Collections.singletonList( jdbcParameter ),
singletonList( jdbcParameter ),
jdbcParameterBindings
);
@ -152,6 +157,10 @@ public class CollectionBatchLoaderArrayParam
RowTransformerStandardImpl.instance(),
ListResultsConsumer.UniqueSemantic.FILTER
);
for ( int i = 0; i < keysToInitialize.length; i++ ) {
finishInitializingKey( keysToInitialize[i], session );
}
}
public void prepare() {

16
hibernate-core/src/main/java/org/hibernate/loader/ast/internal/EntityBatchLoaderArrayParam.java
View File

@ -10,7 +10,6 @@ import java.lang.reflect.Array;
import java.util.Locale;
import org.hibernate.LockOptions;
import org.hibernate.engine.internal.BatchFetchQueueHelper;
import org.hibernate.engine.spi.EntityKey;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.engine.spi.SessionFactoryImplementor;
@ -28,6 +27,8 @@ import org.hibernate.sql.exec.internal.JdbcParameterImpl;
import org.hibernate.sql.exec.spi.JdbcOperationQuerySelect;
import org.hibernate.sql.exec.spi.JdbcParameterBindings;
import static org.hibernate.engine.internal.BatchFetchQueueHelper.removeBatchLoadableEntityKey;
import static org.hibernate.loader.ast.internal.MultiKeyLoadHelper.hasSingleId;
import static org.hibernate.loader.ast.internal.MultiKeyLoadLogging.MULTI_KEY_LOAD_DEBUG_ENABLED;
import static org.hibernate.loader.ast.internal.MultiKeyLoadLogging.MULTI_KEY_LOAD_LOGGER;
@ -48,6 +49,7 @@ public class EntityBatchLoaderArrayParam<T>
private final JdbcParameter jdbcParameter;
private final SelectStatement sqlAst;
private final JdbcOperationQuerySelect jdbcSelectOperation;
private final SingleIdEntityLoaderStandardImpl<T> singleIdLoader;
/**
@ -100,7 +102,10 @@ public class EntityBatchLoaderArrayParam<T>
.getJdbcEnvironment()
.getSqlAstTranslatorFactory()
.buildSelectTranslator( sessionFactory, sqlAst )
.translate( JdbcParameterBindings.NO_BINDINGS, QueryOptions.NONE ); }
.translate( JdbcParameterBindings.NO_BINDINGS, QueryOptions.NONE );
singleIdLoader = new SingleIdEntityLoaderStandardImpl<>( entityDescriptor, sessionFactory );
}
@Override
public int getDomainBatchSize() {
@ -119,6 +124,11 @@ public class EntityBatchLoaderArrayParam<T>
}
final Object[] ids = resolveIdsToInitialize( pkValue, session );
if ( hasSingleId( ids ) ) {
return singleIdLoader.load( pkValue, entityInstance, lockOptions, readOnly, session );
}
initializeEntities( ids, pkValue, entityInstance, lockOptions, readOnly, session );
final EntityKey entityKey = session.generateEntityKey( pkValue, getLoadable().getEntityPersister() );
@ -167,7 +177,7 @@ public class EntityBatchLoaderArrayParam<T>
continue;
}
// found or not, remove the key from the batch-fetch queue
BatchFetchQueueHelper.removeBatchLoadableEntityKey( id, getLoadable(), session );
removeBatchLoadableEntityKey( id, getLoadable(), session );
}
}

11
hibernate-core/src/main/java/org/hibernate/loader/ast/internal/MultiKeyLoadHelper.java
View File

@ -25,7 +25,7 @@ public class MultiKeyLoadHelper {
public static boolean supportsSqlArrayType(Dialect dialect) {
return dialect.supportsStandardArrays()
&& dialect.getPreferredSqlTypeCodeForArray() == SqlTypes.ARRAY;
&& dialect.getPreferredSqlTypeCodeForArray() == SqlTypes.ARRAY;
}
public static JdbcMapping resolveArrayJdbcMapping(
@ -56,4 +56,13 @@ public class MultiKeyLoadHelper {
typeConfiguration.getCurrentBaseSqlTypeIndicators()
);
}
static boolean hasSingleId(Object[] ids) {
for ( int i=1; i<ids.length; i++ ) {
if ( ids[i] != null ) {
return false;
}
}
return true;
}
}