HHH-18170 Subquery randomly generating wrong SQL due to duplicate alias

Author: Marco Pelagatti

hibernate-core/src/main/java/org/hibernate/query/sqm/spi/SqmCreationHelper.java

@@ -11,6 +11,8 @@
 import org.hibernate.spi.NavigablePath;
 import org.hibernate.query.sqm.tree.domain.SqmPath;
 
+import java.util.concurrent.atomic.AtomicLong;
+
 /**
  * @author Steve Ebersole
  */
@@ -27,6 +29,8 @@ public class SqmCreationHelper {
 	 */
 	public static final String IMPLICIT_ALIAS = "{implicit}";
 
+	private static final AtomicLong UNIQUE_ID_COUNTER = new AtomicLong();
+
 	public static NavigablePath buildRootNavigablePath(String base, String alias) {
 		return new NavigablePath( base, determineAlias( alias ) );
 	}
@@ -35,10 +39,14 @@ public static NavigablePath buildSubNavigablePath(NavigablePath lhs, String base
 		return lhs.append( base, determineAlias( alias ) );
 	}
 
+	public static String acquireUniqueAlias() {
+		return Long.toString(UNIQUE_ID_COUNTER.incrementAndGet());
+	}
+
 	public static String determineAlias(String alias) {
 		// Make sure we always create a unique alias, otherwise we might use a wrong table group for the same join
 		if ( alias == null ) {
-			return Long.toString( System.nanoTime() );
+			return acquireUniqueAlias();
 		}
 		else if ( alias == IMPLICIT_ALIAS ) {
 			return null;

hibernate-core/src/main/java/org/hibernate/query/sqm/sql/internal/EmbeddableValuedExpression.java

@@ -15,6 +15,7 @@
 import org.hibernate.metamodel.mapping.EmbeddableValuedModelPart;
 import org.hibernate.metamodel.mapping.ModelPart;
 import org.hibernate.metamodel.mapping.internal.BasicAttributeMapping;
+import org.hibernate.query.sqm.spi.SqmCreationHelper;
 import org.hibernate.spi.NavigablePath;
 import org.hibernate.sql.ast.SqlAstWalker;
 import org.hibernate.sql.ast.spi.SqlAstCreationState;
@@ -46,7 +47,7 @@ public EmbeddableValuedExpression(
 		assert mapping != null;
 		assert sqlExpression != null;
 		assert mapping.getEmbeddableTypeDescriptor().getNumberOfAttributeMappings() == sqlExpression.getExpressions().size();
-		this.navigablePath = baseNavigablePath.append( mapping.getPartName(), Long.toString( System.nanoTime() ) );
+		this.navigablePath = baseNavigablePath.append( mapping.getPartName(), SqmCreationHelper.acquireUniqueAlias());
 		this.mapping = mapping;
 		this.sqlExpression = sqlExpression;
 	}

hibernate-core/src/main/java/org/hibernate/query/sqm/tree/AbstractSqmDmlStatement.java

@@ -16,6 +16,7 @@
 import org.hibernate.query.criteria.JpaRoot;
 import org.hibernate.query.sqm.NodeBuilder;
 import org.hibernate.query.sqm.SqmQuerySource;
+import org.hibernate.query.sqm.spi.SqmCreationHelper;
 import org.hibernate.query.sqm.tree.cte.SqmCteStatement;
 import org.hibernate.query.sqm.tree.expression.SqmParameter;
 import org.hibernate.query.sqm.tree.from.SqmRoot;
@@ -84,21 +85,21 @@ public <X> JpaCteCriteria<X> getCteCriteria(String cteName) {
 
 	@Override
 	public <X> JpaCteCriteria<X> with(AbstractQuery<X> criteria) {
-		return withInternal( Long.toString( System.nanoTime() ), criteria );
+		return withInternal( SqmCreationHelper.acquireUniqueAlias(), criteria );
 	}
 
 	@Override
 	public <X> JpaCteCriteria<X> withRecursiveUnionAll(
 			AbstractQuery<X> baseCriteria,
 			Function<JpaCteCriteria<X>, AbstractQuery<X>> recursiveCriteriaProducer) {
-		return withInternal( Long.toString( System.nanoTime() ), baseCriteria, false, recursiveCriteriaProducer );
+		return withInternal( SqmCreationHelper.acquireUniqueAlias(), baseCriteria, false, recursiveCriteriaProducer );
 	}
 
 	@Override
 	public <X> JpaCteCriteria<X> withRecursiveUnionDistinct(
 			AbstractQuery<X> baseCriteria,
 			Function<JpaCteCriteria<X>, AbstractQuery<X>> recursiveCriteriaProducer) {
-		return withInternal( Long.toString( System.nanoTime() ), baseCriteria, true, recursiveCriteriaProducer );
+		return withInternal( SqmCreationHelper.acquireUniqueAlias(), baseCriteria, true, recursiveCriteriaProducer );
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/query/sqm/tree/select/AbstractSqmSelectQuery.java

@@ -19,6 +19,7 @@
 import org.hibernate.query.criteria.JpaRoot;
 import org.hibernate.query.criteria.JpaSelection;
 import org.hibernate.query.sqm.NodeBuilder;
+import org.hibernate.query.sqm.spi.SqmCreationHelper;
 import org.hibernate.query.sqm.tree.AbstractSqmNode;
 import org.hibernate.query.sqm.tree.SqmCopyContext;
 import org.hibernate.query.sqm.tree.cte.SqmCteStatement;
@@ -112,21 +113,21 @@ public <X> JpaCteCriteria<X> getCteCriteria(String cteName) {
 
 	@Override
 	public <X> JpaCteCriteria<X> with(AbstractQuery<X> criteria) {
-		return withInternal( Long.toString( System.nanoTime() ), criteria );
+		return withInternal( SqmCreationHelper.acquireUniqueAlias(), criteria );
 	}
 
 	@Override
 	public <X> JpaCteCriteria<X> withRecursiveUnionAll(
 			AbstractQuery<X> baseCriteria,
 			Function<JpaCteCriteria<X>, AbstractQuery<X>> recursiveCriteriaProducer) {
-		return withInternal( Long.toString( System.nanoTime() ), baseCriteria, false, recursiveCriteriaProducer );
+		return withInternal( SqmCreationHelper.acquireUniqueAlias(), baseCriteria, false, recursiveCriteriaProducer );
 	}
 
 	@Override
 	public <X> JpaCteCriteria<X> withRecursiveUnionDistinct(
 			AbstractQuery<X> baseCriteria,
 			Function<JpaCteCriteria<X>, AbstractQuery<X>> recursiveCriteriaProducer) {
-		return withInternal( Long.toString( System.nanoTime() ), baseCriteria, true, recursiveCriteriaProducer );
+		return withInternal( SqmCreationHelper.acquireUniqueAlias(), baseCriteria, true, recursiveCriteriaProducer );
 	}
 
 	@Override