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HSQLDB - Lightweight 100% Java SQL Database Engine
/* Copyright (c) 2001-2019, The HSQL Development Group
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*
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*
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package org.hsqldb.test;
/*
* CascadeDeleteBug.java
*
* Created on June 24, 2002, 8:48 AM
*/
import java.io.File;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import junit.framework.TestCase;
/**
* Test case to demonstrate catastrophic bug in cascade delete code.
*
* @version 1.0
* @author David Kopp
*/
public class TestCascade extends TestCase {
Connection con;
public TestCascade(String name) {
super(name);
}
protected void setUp() {
try {
Class.forName("org.hsqldb.jdbc.JDBCDriver");
createDatabase();
con = DriverManager.getConnection("jdbc:hsqldb:testdb", "sa", "");
} catch (Exception e) {
e.printStackTrace();
System.out.println(this + ".setUp() error: " + e.getMessage());
}
}
protected void tearDown() {
try {
con.createStatement().execute("SHUTDOWN");
con.close();
} catch (SQLException e) {}
}
public void testDelete() {
try {
insertData(con);
Statement stmt = con.createStatement();
ResultSet rs =
stmt.executeQuery("SELECT COUNT(EIACODXA) FROM CA");
rs.next();
int origCount = rs.getInt(1);
rs.close();
deleteXBRecord(con);
rs = stmt.executeQuery("SELECT COUNT(EIACODXA) FROM CA");
rs.next();
int newCount = rs.getInt(1);
rs.close();
stmt.close();
assertEquals(9, newCount);
} catch (SQLException e) {
this.assertTrue("SQLException thrown", false);
}
}
private static void createDatabase() throws SQLException {
new File("testdb.backup").delete();
new File("testdb.data").delete();
new File("testdb.properties").delete();
new File("testdb.script").delete();
Connection con = DriverManager.getConnection("jdbc:hsqldb:testdb",
"sa", "");
String[] saDDL = {
"CREATE CACHED TABLE XB (EIACODXA VARCHAR(10) NOT NULL, LSACONXB VARCHAR(18) NOT NULL, ALTLCNXB VARCHAR(2) NOT NULL, LCNTYPXB VARCHAR(1) NOT NULL, LCNINDXB VARCHAR(1), LCNAMEXB VARCHAR(19), UPDT_BY VARCHAR(32), LST_UPDT TIMESTAMP, CONSTRAINT XPKXB PRIMARY KEY (EIACODXA, LSACONXB, ALTLCNXB, LCNTYPXB));",
// "CREATE INDEX XIF2XB ON XB (EIACODXA);",
"CREATE CACHED TABLE CA ( EIACODXA VARCHAR(10) NOT NULL, LSACONXB VARCHAR(18) NOT NULL, ALTLCNXB VARCHAR(2) NOT NULL, LCNTYPXB VARCHAR(1) NOT NULL, TASKCDCA VARCHAR(7) NOT NULL, TSKFRQCA NUMERIC(7,4), UPDT_BY VARCHAR(32), LST_UPDT TIMESTAMP, CONSTRAINT XPKCA PRIMARY KEY (EIACODXA, LSACONXB, ALTLCNXB, LCNTYPXB, TASKCDCA), CONSTRAINT R_XB_CA FOREIGN KEY (EIACODXA, LSACONXB, ALTLCNXB, LCNTYPXB) REFERENCES XB ON DELETE CASCADE);",
// "CREATE INDEX XIF26CA ON CA ( EIACODXA, LSACONXB, ALTLCNXB, LCNTYPXB);"
};
Statement stmt = con.createStatement();
for (int index = 0; index < saDDL.length; index++) {
stmt.executeUpdate(saDDL[index]);
}
stmt.execute("SHUTDOWN");
con.close();
} // createDatabase
/**
* This method demonstrates the bug in cascading deletes. Before this method,
* the CA table has 12 records. After, it should have 9, but instead it has
* 0.
*/
private static void deleteXBRecord(Connection con) throws SQLException {
Statement stmt = con.createStatement();
stmt.executeUpdate(
"DELETE FROM XB WHERE LSACONXB = 'LEAA' AND EIACODXA = 'T850' AND LCNTYPXB = 'P' AND ALTLCNXB = '00'");
stmt.close();
} // deleteXBRecord
private static void insertData(Connection con) throws SQLException {
String[] saData = {
"INSERT INTO XB VALUES('T850','LEAA','00','P',NULL,'LCN NAME','sa',NOW)",
"INSERT INTO XB VALUES('T850','LEAA01','00','P',NULL,'LCN NAME','sa',NOW)",
"INSERT INTO XB VALUES('T850','LEAA02','00','P',NULL,'LCN NAME','sa',NOW)",
"INSERT INTO XB VALUES('T850','LEAA03','00','P',NULL,'LCN NAME','sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA','00','P','ABCDEFG',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA','00','P','QRSTUJV',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA','00','P','ZZZZZZZ',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA01','00','P','ABCDEFG',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA01','00','P','QRSTUJV',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA01','00','P','ZZZZZZZ',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA02','00','P','ABCDEFG',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA02','00','P','QRSTUJV',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA02','00','P','ZZZZZZZ',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA03','00','P','ABCDEFG',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA03','00','P','QRSTUJV',3.14,'sa',NOW)",
"INSERT INTO CA VALUES('T850','LEAA03','00','P','ZZZZZZZ',3.14,'sa',NOW)"
};
Statement stmt = con.createStatement();
for (int index = 0; index < saData.length; index++) {
stmt.executeUpdate(saData[index]);
}
} // insertData
}