HHH-1400 - formula-based property leads to generation of invalid SQL with subselect fetches
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@ -17,6 +17,8 @@ import org.hibernate.persister.entity.PropertyMapping;
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* @author Gavin King
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*/
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public class SubselectFetch {
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private static final String FROM_STRING = " from ";
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private final Set resultingEntityKeys;
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private final String queryString;
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private final String alias;
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@ -39,13 +41,52 @@ public class SubselectFetch {
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//TODO: ugly here:
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final String queryString = queryParameters.getFilteredSQL();
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int fromIndex = queryString.indexOf( " from " );
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int orderByIndex = queryString.lastIndexOf( "order by" );
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final int fromIndex = getFromIndex( queryString );
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final int orderByIndex = queryString.lastIndexOf( "order by" );
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this.queryString = orderByIndex > 0
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? queryString.substring( fromIndex, orderByIndex )
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: queryString.substring( fromIndex );
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}
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private static int getFromIndex(String queryString) {
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int index = queryString.indexOf( FROM_STRING );
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if ( index < 0 ) {
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return index;
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}
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while ( !parenthesesMatch( queryString.substring( 0, index ) ) ) {
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String subString = queryString.substring( index + FROM_STRING.length() );
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int subIndex = subString.indexOf( FROM_STRING );
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if ( subIndex < 0 ) {
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return subIndex;
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}
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index += FROM_STRING.length() + subIndex;
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}
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return index;
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}
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private static boolean parenthesesMatch(String string) {
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int parenCount = 0;
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for ( int i = 0; i < string.length(); i++ ) {
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char character = string.charAt( i );
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if ( character == '(' ) {
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parenCount++;
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}
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else if ( character == ')' ) {
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parenCount--;
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}
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}
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return parenCount == 0;
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}
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public QueryParameters getQueryParameters() {
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return queryParameters;
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}
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@ -0,0 +1,35 @@
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/*
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* Hibernate, Relational Persistence for Idiomatic Java
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*
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* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
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* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
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*/
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package org.hibernate.test.subselectfetch;
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import java.io.Serializable;
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import java.util.List;
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public class Name implements Serializable {
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private int id;
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private String name;
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private int nameLength;
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private List values;
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public int getId() { return id; }
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public String getName() { return name; }
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public int getNameLength() { return nameLength; }
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public List getValues() { return values; }
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public void setId(int id) { this.id = id; }
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public void setName(String name) { this.name = name; }
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public void setNameLength(int nameLength) { this.nameLength = nameLength; }
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public void setValues(List values) { this.values = values; }
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public boolean equals(Object obj) {
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if (!(obj instanceof Name )) return false;
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Name other = (Name) obj;
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return other.id == this.id;
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}
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public int hashCode() { return id; }
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}
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@ -0,0 +1,106 @@
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/*
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* Hibernate, Relational Persistence for Idiomatic Java
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*
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* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
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* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
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*/
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package org.hibernate.test.subselectfetch;
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import java.util.List;
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import org.hibernate.Session;
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import org.hibernate.mapping.Collection;
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import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Test;
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import static org.hamcrest.CoreMatchers.is;
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import static org.junit.Assert.assertThat;
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public class SubselectFetchWithFormulaTest extends BaseNonConfigCoreFunctionalTestCase {
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@Override
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protected String getBaseForMappings() {
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return "";
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}
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@Override
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protected String[] getMappings() {
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return new String[] {
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"org/hibernate/test/subselectfetch/Name.hbm.xml",
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"org/hibernate/test/subselectfetch/Value.hbm.xml"
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};
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}
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@Before
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public void before() {
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Session session = openSession();
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session.getTransaction().begin();
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Name chris = new Name();
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chris.setId( 1 );
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chris.setName( "chris" );
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Value cat = new Value();
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cat.setId(1);
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cat.setName( chris );
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cat.setValue( "cat" );
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Value canary = new Value();
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canary.setId( 2 );
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canary.setName( chris );
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canary.setValue( "canary" );
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session.persist( chris );
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session.persist( cat );
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session.persist( canary );
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Name sam = new Name();
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sam.setId(2);
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sam.setName( "sam" );
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Value seal = new Value();
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seal.setId( 3 );
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seal.setName( sam );
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seal.setValue( "seal" );
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Value snake = new Value();
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snake.setId( 4 );
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snake.setName( sam );
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snake.setValue( "snake" );
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session.persist( sam );
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session.persist(seal);
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session.persist( snake );
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session.getTransaction().commit();
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session.close();
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}
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@After
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public void after() {
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Session session = openSession();
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session.getTransaction().begin();
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session.createQuery( "delete Value" ).executeUpdate();
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session.createQuery( "delete Name" ).executeUpdate();
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session.getTransaction().commit();
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session.close();
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}
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@Test
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public void checkSubselectWithFormula() throws Exception {
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// as a pre-condition make sure that subselect fetching is enabled for the collection...
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Collection collectionBinding = metadata().getCollectionBinding( Name.class.getName() + ".values" );
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assertThat( collectionBinding.isSubselectLoadable(), is( true ) );
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// Now force the subselect fetch and make sure we do not get SQL errors
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Session session = openSession();
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session.getTransaction().begin();
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List results = session.createCriteria(Name.class).list();
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for (Object result : results) {
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Name name = (Name) result;
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name.getValues().size();
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}
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session.getTransaction().commit();
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session.close();
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}
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}
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@ -0,0 +1,31 @@
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/*
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* Hibernate, Relational Persistence for Idiomatic Java
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*
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* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
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* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
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*/
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package org.hibernate.test.subselectfetch;
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import java.io.Serializable;
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public class Value implements Serializable {
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private int id;
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private Name name;
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private String value;
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public int getId() { return id; }
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public Name getName() { return name; }
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public String getValue() { return value; }
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public void setId(int id) { this.id = id; }
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public void setName(Name name) { this.name = name; }
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public void setValue(String value) { this.value = value; }
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public boolean equals(Object obj) {
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if (!(obj instanceof Value )) return false;
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Value other = (Value) obj;
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return other.id == this.id;
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}
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public int hashCode() { return id; }
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}
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@ -0,0 +1,27 @@
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<?xml version="1.0"?>
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<!--
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~ Hibernate, Relational Persistence for Idiomatic Java
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~
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~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.
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~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
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-->
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<!DOCTYPE hibernate-mapping
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PUBLIC "-//Hibernate?Hibernate Mapping DTD//EN"
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"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
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<hibernate-mapping>
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<class name="org.hibernate.test.subselectfetch.Name" table="Name">
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<id name="id" column="id"/>
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<property name="name" column="name"/>
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<property name="nameLength" formula="(select length(name) from name where id=name.id)"/>
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<bag name="values" inverse="true" lazy="false" fetch="subselect">
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<key column="name_id"/>
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<one-to-many class="org.hibernate.test.subselectfetch.Value"/>
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</bag>
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</class>
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</hibernate-mapping>
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@ -0,0 +1,20 @@
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<?xml version="1.0"?>
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<!--
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~ Hibernate, Relational Persistence for Idiomatic Java
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~
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~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.
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~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
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-->
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<!DOCTYPE hibernate-mapping
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PUBLIC "-//Hibernate?Hibernate Mapping DTD//EN"
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"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
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<hibernate-mapping>
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<class name="org.hibernate.test.subselectfetch.Value" table="Value">
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<id name="id" column="id"/>
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<property name="value" column="value"/>
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<many-to-one name="name" column="name_id" insert="false" update="false" />
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</class>
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</hibernate-mapping>
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