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HHH-14201 fix HQL JOIN order issue

This commit is contained in:
Nathan Xu 2020-09-02 15:06:27 -04:00 committed by Christian Beikov
parent cf94259248
commit 886083ab77
3 changed files with 101 additions and 22 deletions
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7
hibernate-core/src/main/antlr/sql-gen.g
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@ -314,12 +314,13 @@ fromTable
// Write the table node (from fragment) and all the join fragments associated with it.
: #( a:FROM_FRAGMENT { out(a); } (tableJoin [ a ])* { fromFragmentSeparator(a); } )
| #( b:JOIN_FRAGMENT { out(b); } (tableJoin [ b ])* { fromFragmentSeparator(b); } )
| #( e:ENTITY_JOIN { out(e); } (tableJoin [ e ])* { fromFragmentSeparator(e); } )
| #( c:ENTITY_JOIN { out(c); } (tableJoin [ c ])* { fromFragmentSeparator(c); } )
;
tableJoin [ AST parent ]
: #( c:JOIN_FRAGMENT { out(" "); out(c); } (tableJoin [ c ] )* )
| #( d:FROM_FRAGMENT { nestedFromFragment(d,parent); } (tableJoin [ d ] )* )
: #( d:JOIN_FRAGMENT { out(" "); out(d); } (tableJoin [ d ] )* )
| #( e:FROM_FRAGMENT { nestedFromFragment(e,parent); } (tableJoin [ e ] )* )
| #( f:ENTITY_JOIN { out(" "); out(f); } (tableJoin [ f ] )* )
;
booleanOp[ boolean parens ]

28
hibernate-core/src/main/java/org/hibernate/hql/internal/ast/tree/FromClause.java
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@ -6,9 +6,9 @@
*/
package org.hibernate.hql.internal.ast.tree;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
@ -34,7 +34,7 @@ public class FromClause extends HqlSqlWalkerNode implements HqlSqlTokenTypes, Di
public static final int ROOT_LEVEL = 1;
private int level = ROOT_LEVEL;
private Set<FromElement> fromElements = new HashSet<FromElement>();
private Set<FromElement> fromElements = new LinkedHashSet<FromElement>();
private Map<String,FromElement> fromElementByClassAlias = new HashMap<String,FromElement>();
private Map<String,FromElement> fromElementByTableAlias = new HashMap<String,FromElement>();
private Map<String,FromElement> fromElementsByPath = new HashMap<String,FromElement>();
@ -61,8 +61,6 @@ public class FromClause extends HqlSqlWalkerNode implements HqlSqlTokenTypes, Di
*/
private List impliedElements = new LinkedList();
private List<EntityJoinFromElement> entityJoinFromElements;
/**
* Adds a new from element to the from node.
*
@ -91,25 +89,18 @@ public class FromClause extends HqlSqlWalkerNode implements HqlSqlTokenTypes, Di
if ( tableAlias != null ) {
fromElementByTableAlias.put( tableAlias, element );
}
if ( element instanceof EntityJoinFromElement ) {
if ( entityJoinFromElements == null ) {
entityJoinFromElements = new ArrayList<EntityJoinFromElement>();
}
entityJoinFromElements.add( (EntityJoinFromElement) element );
}
}
public void finishInit() {
if ( entityJoinFromElements == null ) {
return;
// Insert EntityJoinFromElements while maintaining their original position during depth-first traversal.
FromElement lastFromElement = null;
for ( FromElement fromElement : fromElements ) {
if ( fromElement instanceof EntityJoinFromElement ) {
assert lastFromElement != null;
ASTUtil.insertChild( lastFromElement, fromElement );
}
for ( EntityJoinFromElement entityJoinFromElement : entityJoinFromElements ) {
ASTUtil.appendChild( this, entityJoinFromElement );
lastFromElement = fromElement;
}
entityJoinFromElements.clear();
}
void addDuplicateAlias(String alias, FromElement element) {
@ -412,4 +403,5 @@ public class FromClause extends HqlSqlWalkerNode implements HqlSqlTokenTypes, Di
public String toString() {
return "FromClause{level=" + level + "}";
}
}

86
hibernate-core/src/test/java/org/hibernate/query/JoinOrderTest.java Normal file
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@ -0,0 +1,86 @@
package org.hibernate.query;
import java.util.Map;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
import org.hibernate.testing.TestForIssue;
import org.hibernate.testing.jdbc.SQLStatementInterceptor;
import org.junit.Test;
import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
import static org.junit.Assert.assertTrue;
/**
* @author Christian Beikov
* @author Nathan Xu
*/
@TestForIssue( jiraKey = "HHH-14201" )
public class JoinOrderTest extends BaseEntityManagerFunctionalTestCase {
private SQLStatementInterceptor sqlStatementInterceptor;
@Override
protected void addConfigOptions(Map options) {
sqlStatementInterceptor = new SQLStatementInterceptor( options );
}
@Override
public Class<?>[] getAnnotatedClasses() {
return new Class<?>[] {
EntityA.class,
EntityB.class,
EntityC.class
};
}
@Test
public void testJoinOrder() {
doInJPA( this::entityManagerFactory, entityManager -> {
sqlStatementInterceptor.clear();
final String hql =
"SELECT 1 " +
"FROM EntityA a " +
"JOIN EntityB b ON b.a = a " +
"JOIN a.c c ON c.b = b";
entityManager.createQuery( hql ).getResultList();
sqlStatementInterceptor.assertExecutedCount( 1 );
final String sql = sqlStatementInterceptor.getSqlQueries().getFirst();
assertTrue( sql.matches( "^.+(?: join EntityB ).+(?: join EntityC ).+$" ) );
} );
}
@Entity(name = "EntityA")
public static class EntityA {
@Id
int id;
@ManyToOne
EntityC c;
}
@Entity(name = "EntityB")
public static class EntityB {
@Id
int id;
@ManyToOne
EntityA a;
}
@Entity(name = "EntityC")
public static class EntityC {
@Id
int id;
@ManyToOne
EntityB b;
}
}