HHH-1400 - formula-based property leads to generation of invalid SQL with subselect fetches

This commit is contained in:
Steve Ebersole 2015-10-27 21:40:25 -05:00
parent fa4e1a04ed
commit 82c5e0ae26
7 changed files with 262 additions and 2 deletions

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@ -17,6 +17,8 @@ import org.hibernate.persister.entity.PropertyMapping;
* @author Gavin King
*/
public class SubselectFetch {
private static final String FROM_STRING = " from ";
private final Set resultingEntityKeys;
private final String queryString;
private final String alias;
@ -39,13 +41,52 @@ public class SubselectFetch {
//TODO: ugly here:
final String queryString = queryParameters.getFilteredSQL();
int fromIndex = queryString.indexOf( " from " );
int orderByIndex = queryString.lastIndexOf( "order by" );
final int fromIndex = getFromIndex( queryString );
final int orderByIndex = queryString.lastIndexOf( "order by" );
this.queryString = orderByIndex > 0
? queryString.substring( fromIndex, orderByIndex )
: queryString.substring( fromIndex );
}
private static int getFromIndex(String queryString) {
int index = queryString.indexOf( FROM_STRING );
if ( index < 0 ) {
return index;
}
while ( !parenthesesMatch( queryString.substring( 0, index ) ) ) {
String subString = queryString.substring( index + FROM_STRING.length() );
int subIndex = subString.indexOf( FROM_STRING );
if ( subIndex < 0 ) {
return subIndex;
}
index += FROM_STRING.length() + subIndex;
}
return index;
}
private static boolean parenthesesMatch(String string) {
int parenCount = 0;
for ( int i = 0; i < string.length(); i++ ) {
char character = string.charAt( i );
if ( character == '(' ) {
parenCount++;
}
else if ( character == ')' ) {
parenCount--;
}
}
return parenCount == 0;
}
public QueryParameters getQueryParameters() {
return queryParameters;
}

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@ -0,0 +1,35 @@
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.test.subselectfetch;
import java.io.Serializable;
import java.util.List;
public class Name implements Serializable {
private int id;
private String name;
private int nameLength;
private List values;
public int getId() { return id; }
public String getName() { return name; }
public int getNameLength() { return nameLength; }
public List getValues() { return values; }
public void setId(int id) { this.id = id; }
public void setName(String name) { this.name = name; }
public void setNameLength(int nameLength) { this.nameLength = nameLength; }
public void setValues(List values) { this.values = values; }
public boolean equals(Object obj) {
if (!(obj instanceof Name )) return false;
Name other = (Name) obj;
return other.id == this.id;
}
public int hashCode() { return id; }
}

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@ -0,0 +1,106 @@
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.test.subselectfetch;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.mapping.Collection;
import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
public class SubselectFetchWithFormulaTest extends BaseNonConfigCoreFunctionalTestCase {
@Override
protected String getBaseForMappings() {
return "";
}
@Override
protected String[] getMappings() {
return new String[] {
"org/hibernate/test/subselectfetch/Name.hbm.xml",
"org/hibernate/test/subselectfetch/Value.hbm.xml"
};
}
@Before
public void before() {
Session session = openSession();
session.getTransaction().begin();
Name chris = new Name();
chris.setId( 1 );
chris.setName( "chris" );
Value cat = new Value();
cat.setId(1);
cat.setName( chris );
cat.setValue( "cat" );
Value canary = new Value();
canary.setId( 2 );
canary.setName( chris );
canary.setValue( "canary" );
session.persist( chris );
session.persist( cat );
session.persist( canary );
Name sam = new Name();
sam.setId(2);
sam.setName( "sam" );
Value seal = new Value();
seal.setId( 3 );
seal.setName( sam );
seal.setValue( "seal" );
Value snake = new Value();
snake.setId( 4 );
snake.setName( sam );
snake.setValue( "snake" );
session.persist( sam );
session.persist(seal);
session.persist( snake );
session.getTransaction().commit();
session.close();
}
@After
public void after() {
Session session = openSession();
session.getTransaction().begin();
session.createQuery( "delete Value" ).executeUpdate();
session.createQuery( "delete Name" ).executeUpdate();
session.getTransaction().commit();
session.close();
}
@Test
public void checkSubselectWithFormula() throws Exception {
// as a pre-condition make sure that subselect fetching is enabled for the collection...
Collection collectionBinding = metadata().getCollectionBinding( Name.class.getName() + ".values" );
assertThat( collectionBinding.isSubselectLoadable(), is( true ) );
// Now force the subselect fetch and make sure we do not get SQL errors
Session session = openSession();
session.getTransaction().begin();
List results = session.createCriteria(Name.class).list();
for (Object result : results) {
Name name = (Name) result;
name.getValues().size();
}
session.getTransaction().commit();
session.close();
}
}

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@ -0,0 +1,31 @@
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.test.subselectfetch;
import java.io.Serializable;
public class Value implements Serializable {
private int id;
private Name name;
private String value;
public int getId() { return id; }
public Name getName() { return name; }
public String getValue() { return value; }
public void setId(int id) { this.id = id; }
public void setName(Name name) { this.name = name; }
public void setValue(String value) { this.value = value; }
public boolean equals(Object obj) {
if (!(obj instanceof Value )) return false;
Value other = (Value) obj;
return other.id == this.id;
}
public int hashCode() { return id; }
}

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@ -0,0 +1,27 @@
<?xml version="1.0"?>
<!--
~ Hibernate, Relational Persistence for Idiomatic Java
~
~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.
~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
-->
<!DOCTYPE hibernate-mapping
PUBLIC "-//Hibernate?Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="org.hibernate.test.subselectfetch.Name" table="Name">
<id name="id" column="id"/>
<property name="name" column="name"/>
<property name="nameLength" formula="(select length(name) from name where id=name.id)"/>
<bag name="values" inverse="true" lazy="false" fetch="subselect">
<key column="name_id"/>
<one-to-many class="org.hibernate.test.subselectfetch.Value"/>
</bag>
</class>
</hibernate-mapping>

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@ -0,0 +1,20 @@
<?xml version="1.0"?>
<!--
~ Hibernate, Relational Persistence for Idiomatic Java
~
~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.
~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
-->
<!DOCTYPE hibernate-mapping
PUBLIC "-//Hibernate?Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="org.hibernate.test.subselectfetch.Value" table="Value">
<id name="id" column="id"/>
<property name="value" column="value"/>
<many-to-one name="name" column="name_id" insert="false" update="false" />
</class>
</hibernate-mapping>