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/*
* Derby - Class org.apache.derbyTesting.functionTests.tests.memory.Derby3009Test
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.derbyTesting.functionTests.tests.memory;
import java.sql.SQLException;
import java.sql.Statement;
import junit.framework.Test;
import org.apache.derbyTesting.junit.BaseJDBCTestCase;
import org.apache.derbyTesting.junit.CleanDatabaseTestSetup;
import org.apache.derbyTesting.junit.TestConfiguration;
/**
* Regression test for DERBY-3009 which caused OutOfMemoryError when creating
* many foreign key constraints on a table. Run the test with 16 MB heap to
* expose the problem.
*/
public class Derby3009Test extends BaseJDBCTestCase {
public Derby3009Test(String name) {
super(name);
}
public static Test suite() {
// The OOME happened in the engine, so run this test in embedded mode.
return new CleanDatabaseTestSetup(
TestConfiguration.embeddedSuite(Derby3009Test.class));
}
public void testTableWithManyForeignKeys() throws SQLException {
Statement s = createStatement();
// Create 50 tables with 50 columns each (plus primary key column).
final int tables = 50;
final int columns = 50;
for (int i = 1; i <= tables; i++) {
StringBuffer sql = new StringBuffer("create table d3009_t");
sql.append(i);
sql.append("(id int primary key");
for (int j = 1; j <= columns; j++) {
sql.append(", x").append(j).append(" int");
}
sql.append(")");
s.execute(sql.toString());
}
// Now add many foreign key constraints to table 50. Used to cause an
// OutOfMemoryError before DERBY-3009.
for (int i = 1; i <= tables; i++) {
s.execute("alter table d3009_t50 add constraint d3009_fk" + i +
" foreign key(x" + i + ") references d3009_t" + i);
}
}
}
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