/*
* Copyright 2004-2011 H2 Group. Multiple-Licensed under the H2 License,
* Version 1.0, and under the Eclipse Public License, Version 1.0
* (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.test.db;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.h2.constant.ErrorCode;
import org.h2.test.TestBase;
/**
* Tests out of memory situations. The database must not get corrupted, and
* transactions must stay atomic.
*/
public class TestOutOfMemory extends TestBase {
/**
* Run just this test.
*
* @param a ignored
*/
public static void main(String... a) throws Exception {
TestBase.createCaller().init().test();
}
public void test() throws SQLException {
if (config.memory || config.mvcc) {
return;
}
for (int i = 0; i < 5; i++) {
System.gc();
}
deleteDb("outOfMemory");
Connection conn = getConnection("outOfMemory;MAX_OPERATION_MEMORY=1000000");
Statement stat = conn.createStatement();
stat.execute("drop all objects");
stat.execute("create table stuff (id int, text varchar as space(100) || id)");
stat.execute("insert into stuff(id) select x from system_range(1, 3000)");
PreparedStatement prep = conn.prepareStatement("update stuff set text = text || space(1000) || id");
prep.execute();
stat.execute("checkpoint");
eatMemory(80);
try {
try {
prep.execute();
fail();
} catch (SQLException e) {
assertEquals(ErrorCode.OUT_OF_MEMORY, e.getErrorCode());
}
assertThrows(ErrorCode.DATABASE_IS_CLOSED, conn).close();
freeMemory();
conn = null;
conn = getConnection("outOfMemory");
stat = conn.createStatement();
ResultSet rs = stat.executeQuery("select count(*) from stuff");
rs.next();
assertEquals(3000, rs.getInt(1));
} finally {
try {
conn.close();
} catch (SQLException e) {
// out of memory will / may close the database
assertKnownException(e);
}
}
deleteDb("outOfMemory");
}
}