/*

Derby - Class org.apache.dertbyTesting.functionTests.tests.upgradeTests.BasicSetup

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.upgradeTests;

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import javax.sql.DataSource;
import junit.framework.Test;
import org.apache.derby.catalog.SystemProcedures;
import org.apache.derbyTesting.functionTests.util.streams.LoopingAlphabetStream;
import org.apache.derbyTesting.junit.BaseTestSuite;
import org.apache.derbyTesting.junit.JDBC;
import org.apache.derbyTesting.junit.JDBCDataSource;
import org.apache.derbyTesting.junit.TestConfiguration;
import org.apache.derbyTesting.junit.XML;

/**
 * Basic fixtures and setup for the upgrade test, not
 * tied to any specific release.
 */
public class BasicSetup extends UpgradeChange {
    
    public static Test suite() {
        BaseTestSuite suite = new BaseTestSuite("Upgrade basic setup");

        suite.addTest(new BaseTestSuite(BasicSetup.class));

        if (XML.classpathMeetsXMLReqs()) {
            // Only test XML operators if they are supported by the version
            // we upgrade to.
            suite.addTest(new BasicSetup("xmlTestTriggerWithXMLOperators"));
        }

        return suite;
    }

    public BasicSetup(String name) {
        super(name);
    }
    
    /**
     * Simple test of the triggers. Added for DERBY-4835
     */
    public void testTriggerBasic() throws SQLException
    {
        Statement s = createStatement();
        switch (getPhase())
        {
        case PH_CREATE:
            s.executeUpdate("CREATE TABLE Trigger_t1 " +
            		"(c1 INTEGER NOT NULL GENERATED ALWAYS " +
            		"AS IDENTITY (START WITH 1, INCREMENT BY 1), " +
            		"max_size INTEGER NOT NULL, "+
            		"CONSTRAINT c1_pk PRIMARY KEY (c1))");
            s.executeUpdate("CREATE TABLE Trigger_t2 "+
            		"(c1 INTEGER DEFAULT 0 NOT NULL)");
            s.executeUpdate("CREATE TRIGGER gls_blt_trg "+
            		"AFTER INSERT ON Trigger_t1 FOR EACH ROW MODE DB2SQL "+
            		"INSERT INTO Trigger_t2(c1) "+
            		"VALUES ( (select max(c1) from Trigger_t1))");
            s.executeUpdate("INSERT INTO Trigger_t1(max_size) "+
            		"VALUES(20)");
            break;
        case PH_SOFT_UPGRADE:
        case PH_POST_SOFT_UPGRADE:
        case PH_HARD_UPGRADE:
            s.executeUpdate("INSERT INTO Trigger_t1(max_size) "+
    		"VALUES(20)");
            break;
        }
        s.close();
    }

    /**
     * Simple test of the old version from the meta data.
     */
    public void testOldVersion() throws SQLException
    {              
        switch (getPhase())
        {
        case PH_CREATE:
        case PH_POST_SOFT_UPGRADE:
            DatabaseMetaData dmd = getConnection().getMetaData();
            assertEquals("Old major (driver): ",
                    getOldMajor(), dmd.getDriverMajorVersion());
            assertEquals("Old minor (driver): ",
                    getOldMinor(), dmd.getDriverMinorVersion());
            assertEquals("Old major (database): ",
                    getOldMajor(), dmd.getDatabaseMajorVersion());
            assertEquals("Old minor (database): ",
                    getOldMinor(), dmd.getDatabaseMinorVersion());
            break;
        }
    }
    
    /**
     * Test general DML. Just execute some INSERT/UPDATE/DELETE
     * statements in all phases to see that generally the database works.
     * @throws SQLException
     */
    public void testDML() throws SQLException {
        
        final int phase = getPhase();
        
        Statement s = createStatement();
        
        switch (phase) {
        case PH_CREATE:
            s.executeUpdate("CREATE TABLE PHASE" +
                                                "(id INT NOT NULL, ok INT)");
            s.executeUpdate("CREATE TABLE TABLE1" +
                        "(id INT NOT NULL PRIMARY KEY, name varchar(200))");
            break;
        case PH_SOFT_UPGRADE:
            break;
        case PH_POST_SOFT_UPGRADE:
            break;
        case PH_HARD_UPGRADE:
            break;
        }
        s.close();
    
        PreparedStatement ps = prepareStatement(
                "INSERT INTO PHASE(id) VALUES (?)");
        ps.setInt(1, phase);
        ps.executeUpdate();
        ps.close();
        
        ps = prepareStatement("INSERT INTO TABLE1 VALUES (?, ?)");
        for (int i = 1; i < 20; i++)
        {
            ps.setInt(1, i + (phase * 100));
            ps.setString(2, "p" + phase + "i" + i);
            ps.executeUpdate();
        }
        ps.close();
        ps = prepareStatement("UPDATE TABLE1 set name = name || 'U' " +
                                    " where id = ?");
        for (int i = 1; i < 20; i+=3)
        {
            ps.setInt(1, i + (phase * 100));
            ps.executeUpdate();
        }
        ps.close();
        ps = prepareStatement("DELETE FROM TABLE1 where id = ?");
        for (int i = 1; i < 20; i+=4)
        {
            ps.setInt(1, i + (phase * 100));
            ps.executeUpdate();
        }
        ps.close();
        commit();
    }

    /**
     * Make sure table created in soft upgrade mode can be 
     * accessed after shutdown.  DERBY-2931
     * @throws SQLException
     */
    public void testCreateTable() throws SQLException
    {
        
        Statement stmt = createStatement();
        try {
            stmt.executeUpdate("DROP table t");
        } catch (SQLException se) {
            // ignore table does not exist error on
            // on drop table.
            assertSQLState("42Y55",se ); 
        }
        stmt.executeUpdate("CREATE TABLE T (I INT)");
        TestConfiguration.getCurrent().shutdownDatabase();
        stmt = createStatement();
        ResultSet rs = stmt.executeQuery("SELECT * from t");
        JDBC.assertEmpty(rs);  
        rs.close();
    }
    

    /**
     * Test table with index can be read after
     * shutdown DERBY-2931
     * @throws SQLException
     */
    public void testIndex() throws SQLException 
    {
        Statement stmt = createStatement();
        try {
            stmt.executeUpdate("DROP table ti");
        } catch (SQLException se) {
            // ignore table does not exist error on
            // on drop table.
            assertSQLState("42Y55",se ); 
        }
        stmt.executeUpdate("CREATE TABLE TI (I INT primary key not null)");
        stmt.executeUpdate("INSERT INTO  TI values(1)");
        stmt.executeUpdate("INSERT INTO  TI values(2)");
        stmt.executeUpdate("INSERT INTO  TI values(3)");
        TestConfiguration.getCurrent().shutdownDatabase();
        stmt = createStatement();
        ResultSet rs = stmt.executeQuery("SELECT * from TI ORDER BY I");
        JDBC.assertFullResultSet(rs, new String[][] {{"1"},{"2"},{"3"}});
        rs.close();        
    }

    
    /**
     * Ensure that after hard upgrade (with the old version)
     * we can no longer connect to the database.
     */
    public void noConnectionAfterHardUpgrade()
    {              
        switch (getPhase())
        {
        case PH_POST_HARD_UPGRADE:
            try {
                    getConnection();
                } catch (SQLException e) {
                    // Check the innermost of the nested exceptions
                    SQLException sqle = getLastSQLException(e);
                    String sqlState = sqle.getSQLState();
                	// while beta, XSLAP is expected, if not beta, XSLAN
                	if (!(sqlState.equals("XSLAP")) && !(sqlState.equals("XSLAN")))
                		fail("expected an error indicating no connection");
                }
            break;
        }
    }  

    /**
     * Test case that drops all trigger plans. Should be run at the end of
     * soft upgrade if the old version suffers from DERBY-4835 or DERBY-5289.
     * Otherwise, the database may fail to boot again with the old version.
     */
    public void dropAllTriggerPlans() throws Exception {
        Statement s = createStatement();
        s.execute("create procedure clear_sps_plans() language java "
                + "parameter style java external name '"
                + getClass().getName()
                + ".clearSPSPlans'");
        s.execute("call clear_sps_plans()");
        s.execute("drop procedure clear_sps_plans");
    }

    /**
     * Stored procedure that clears all SPS plans in the database. It does
     * the same as SYSCS_UTIL.SYSCS_INVALIDATE_STORED_STATEMENTS, but we
     * need to create our own procedure since the built-in procedure might
     * not be available in soft upgrade.
     */
    public static void clearSPSPlans() throws SQLException {
        SystemProcedures.SYSCS_INVALIDATE_STORED_STATEMENTS();
    }

    /**
     * DERBY-5249 table created with primary and foreign key can't be dropped
     * Test currently disabled. Remove the x from the name to enable the 
     * test once the bug is fixed.
     * 
     */
    public void testDropTableAfterUpgradeWithConstraint() throws SQLException {
        final int phase = getPhase();

        Statement s = createStatement();

        switch (phase) {
        case PH_CREATE:
            s.executeUpdate("CREATE SCHEMA S");
            s.executeUpdate("CREATE TABLE S.RS (R_TYPE_ID VARCHAR(64) "
                    + "NOT NULL)");
            s.executeUpdate("ALTER TABLE S.RS ADD CONSTRAINT PK_RS "
                    + "PRIMARY KEY (R_TYPE_ID)");
            s.executeUpdate("CREATE TABLE S.R_TYPE_ID (R_TYPE_ID "
                    + "VARCHAR(64) NOT NULL)");
            s.executeUpdate("ALTER TABLE S.R_TYPE_ID ADD CONSTRAINT "
                    + "PK_R_TYPE_ID PRIMARY KEY (R_TYPE_ID)");
            s.executeUpdate("ALTER TABLE S.RS ADD CONSTRAINT "
                    + "FK_RS_TYPEID FOREIGN KEY (R_TYPE_ID) REFERENCES "
                    + "S.R_TYPE_ID (R_TYPE_ID) ON DELETE CASCADE ON "
                    + "UPDATE NO ACTION");
            /*
             * With 10.0 and early 10.1 releases a duplicate conglomerate entry
             * shows in sys.sysconglomerates for the primary key PK_RS. It can
             * be seen with this query.
             
                Utilities.showResultSet(s.executeQuery(
                        "select c.constraintname, c.constraintid,  cong.conglomerateid, cong.conglomeratename  from sys.sysconglomerates cong, sys.syskeys k, sys.sysconstraints c where c.constraintname = 'PK_RS' and c.constraintid =k.constraintid and k.conglomerateid = cong.conglomerateid "
              ));
            */
            break;
        case PH_SOFT_UPGRADE:
            s.executeUpdate("ALTER TABLE S.RS DROP CONSTRAINT FK_RS_TYPEID");
            s.executeUpdate("ALTER TABLE S.R_TYPE_ID DROP CONSTRAINT "
                    + "PK_R_TYPE_ID");
            s.executeUpdate("ALTER TABLE S.RS DROP CONSTRAINT PK_RS");
            s.executeUpdate("DROP TABLE S.RS");
            s.executeUpdate("DROP TABLE S.R_TYPE_ID");
            s.executeUpdate("DROP SCHEMA S RESTRICT");
            break;
        case PH_POST_SOFT_UPGRADE:
            break;
        case PH_HARD_UPGRADE:
            break;
        }

    }

    public void testDERBY5121TriggerTest2() throws Exception
    {
        Statement s = createStatement();
        boolean modeDb2SqlOptional = oldAtLeast(10, 3);
    	String updateSQL = "update media "+
    	"set name = 'Mon Liza', description = 'Something snarky.' " +
    	"where mediaID = 1";
        
        switch ( getPhase() )
        {
        case PH_CREATE: // create with old version
        	s.execute("create table folder ( "+
        			"folderType	int	not null, folderID	int	not null, "+
        			"folderParent int, folderName varchar(50) not null)");
        	s.execute("create table media ( " +
        			"mediaID int not null, name varchar(50)	not null, "+
        			"description clob not null, mediaType varchar(50), "+
        			"mediaContents	blob, folderID int not null	default 7)");
        	s.execute("create trigger mediaInsrtDupTrgr " +
        			"after INSERT on media referencing new as nr "+
        			"for each ROW "+
        			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
        			"values( nr.folderID, 7, nr.name)");
        	s.execute("create trigger mediaUpdtDupTrgr " +
        			"after UPDATE of folderID, name on media " +
        			"referencing new as nr "+
        			"for each ROW "+
        			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
        			"values( nr.folderID, 7, nr.name)");
        	s.executeUpdate("insert into folder(folderType, folderID, "+
        			"folderParent, folderName ) "+
        			"values ( 7, 7, null, 'media' )");
        	s.executeUpdate("insert into media(mediaID, name, description)"+
        			"values (1, 'Mona Lisa', 'A photo of the Mona Lisa')");
        	if (oldIs(10,7,1,1))
                assertStatementError(  "XCL12", s, updateSQL );
        	else
        		s.executeUpdate(updateSQL);
        	break;

        case PH_SOFT_UPGRADE:
    		s.executeUpdate(updateSQL);
        	break;
        	
        case PH_POST_SOFT_UPGRADE:
        	//Derby 10.7.1.1 is not going to work because UPDATE sql should
        	// have read all the columns from the trigger table but it did
        	// not and hence trigger can't find the column it needs from the
        	// trigger table
        	if (oldIs(10,7,1,1))
                assertStatementError(  "S0022", s, updateSQL );
        	else
        		s.executeUpdate(updateSQL);
        	break;
        case PH_HARD_UPGRADE:
    		s.executeUpdate(updateSQL);
        	break;
        case PH_POST_HARD_UPGRADE:
    		s.executeUpdate(updateSQL);
        	s.executeUpdate("drop table media");
        	s.executeUpdate("drop table folder");
        	break;
        }
    }

    //Make sure that the rows lost from sysdepends with earlier release
    // are restored when the db is in soft upgrade mode or when it has
    // been hard upgraded to this release. DERBY-5120
    public void preapreFortDERBY5120() throws Exception
    {
        Statement s = createStatement();
        boolean modeDb2SqlOptional = oldAtLeast(10, 3);

        //DERBY-6684(Failure in testDERBY5120NumRowsInSydependsForTrigger when 
        // upgrading from 10.11.1.0 to trunk)
        //We ran into DERBY-6684 after the fix for DERBY-2041 went into 10.11
        //The failure is the expected behavior since when dropping a table,
        // we should detect any dependent triggers defined on other tables
        // and drop table should fail if such dependencies exist. To fix the
        // test failure, we just need to switch the order of drop table
        //DERBY-2041(Trigger should register a dependency on tables and 
        // columns used in its body)
        //Drop ATDC_TAB1 before ATDC_BKUP1 because ATDC_TAB1 has a trigger
        // on it which references ATDC_BKUP1. If we try dropping ATDC_BKUP1
        // without first dropping ATDC_TAB1, there will be an error message
        // that trigger ATDC_TAB1_TRG1 depends on ATDC_BKUP1
        dropTable("ATDC_TAB1");
        dropTable("ATDC_BKUP1");
        s.execute("create table ATDC_TAB1(c11 int, c12 int)");
        s.execute("insert into ATDC_TAB1 values (1,11)");
        s.execute("create table ATDC_BKUP1(c111 int, c112 int)");
        //Three rows will be added in sysdepends for following trigger
        s.execute("create trigger ATDC_TAB1_TRG1 after update "+
           		"of C11 on ATDC_TAB1 REFERENCING old_table as old " +
           		"for each statement " + 
       			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
                "insert into ATDC_BKUP1 select * from old");
        //Three rows will be added in sysdepends for following trigger
        s.execute("create trigger ATDC_TAB1_TRG2 after update " + 
                "on ATDC_TAB1 for each row " + 
     			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
                "values(1,2)");
    }

    //Make sure that the rows lost from sysdepends with earlier release
    // are restored when the db is in soft upgrade mode or when it has
    // been hard upgraded to this release. DERBY-5120
    public void testDERBY5120NumRowsInSydependsForTrigger() throws Exception
    {
        //During the upgrade time, the clearing of stored statements(including 
        // trigger action spses) happened conditionally before DERBY-4835 was 
        // fixed. DERBY-4835 made changes so that the stored statements get 
        // marked invalid unconditionally during the upgrade phase. But these
        // changes for DERBY-4835 did not make into 10.5.1.1, 10.5.3.0, 
        // 10.6.1.0 and 10.6.2.1. Because of this missing fix, trigger 
        // action spses do not get marked invalid when the database is taken 
        // after soft upgrade back to the original db release(if the original 
        // db release is one of the releases mentioned above). Following test 
        // relies on trigger action spses getting invalid during upgrade phase 
        // and getting recompiled when they are fired next time around thus 
        // altering the number of rows in sysdepends. Because of this, I have
        // disabled this test for those 4 releases.
        if (oldIs(10,5,1,1) || oldIs(10,5,3,0) ||
        	oldIs(10,6,1,0) || oldIs(10,6,2,1))
            		return;
    
        Statement s = createStatement();
        int sysdependsRowCountBeforeCreateTrigger;
        boolean modeDb2SqlOptional = oldAtLeast(10, 3);
        
        switch ( getPhase() )
        {
        case PH_CREATE: // create with old version
        	preapreFortDERBY5120();
            //Following update will recpmpile the first trigger since it was
            // marked invalid during the creation of the 2nd trigger. But
            // as part of recompiling, we accidentally erase the dependency
            // between trigger action sps and trigger table except in 10.8.2.2 
            // and higher releases where DERBY-5120 has already been fixed.
            s.execute("update ATDC_TAB1 set c11=11");
            s.executeUpdate("alter table ATDC_TAB1 add column c113 int");

            //DERBY-5120 has been fixed in 10.8.2.2 and higher and hence we 
            // will not see the buggy behavior on those codelines
            if (oldLessThan(10,8,2,2)) 
                s.execute("update ATDC_TAB1 set c11=11");
            else
                assertStatementError("42802", s, " update ATDC_TAB1 set c11=2");            
            break;

        case PH_SOFT_UPGRADE:
        case PH_HARD_UPGRADE:
        	//During soft/hard upgrade, the sps regeneration has been 
        	// fixed and hence we won't loose the dependency between 
        	// trigger action sps and trigger table. During upgrade 
        	// process, all the spses get marked invalid and hence they 
        	// will be regenerated during the next time they get fired.
            assertStatementError("42802", s, " update ATDC_TAB1 set c11=2");
        	break;
        	
        case PH_POST_SOFT_UPGRADE:
        	//During the path back to original release, all the spses get
        	// marked invalid and hence they will be regenerated during 
        	// the next time they get fired. This regeneration will cause
        	// the dependency between trigger action sps and trigger table 
        	// be dropped except in 10.8.2.2 and higher releases where
        	// DERBY-5120 has already been fixed.
            assertStatementError("42802", s, " update ATDC_TAB1 set c11=2");

        	preapreFortDERBY5120();
            s.execute("update ATDC_TAB1 set c11=11");
            s.executeUpdate("alter table ATDC_TAB1 add column c113 int");
            //DERBY-5120 has been fixed in 10.8.2.2 and higher and hence we 
            // will not see the buggy behavior on those codelines
            if (oldLessThan(10,8,2,2)) 
                s.execute("update ATDC_TAB1 set c11=11");
            else
                assertStatementError("42802", s, " update ATDC_TAB1 set c11=11");            
        	break;

        case PH_POST_HARD_UPGRADE:
        	//We are now in trunk which has DERBY-5120 fixed and hence
        	// dependencies between trigger action sps and trigger table
        	// will not be lost
            assertStatementError("42802", s, " update ATDC_TAB1 set c11=2");

        	preapreFortDERBY5120();
            s.execute("update ATDC_TAB1 set c12=11");
            s.executeUpdate("alter table ATDC_TAB1 add column c113 int");
            assertStatementError("42802", s, " update ATDC_TAB1 set c11=2");
        	break;
        }
    }

    //Get a count of number of rows in SYS.SYSDEPENDS
    private int numberOfRowsInSysdepends(Statement st)
    		throws SQLException {
    	ResultSet rs = st.executeQuery("SELECT COUNT(*) FROM SYS.SYSDEPENDS");
    	rs.next();
    	return(rs.getInt(1));
    }
    
    /**
     * Following test is for checking the upgrade scenario for DERBY-5044
     *  and DERBY-5120.
     */
    public void testDERBY5044_And_DERBY5120_DropColumn() throws Exception {
    	// ALTER TABLE DROP COLUMN was introduced in 10.3 so no point running
    	// this test with earlier releases
    	if (!oldAtLeast(10, 3)) return;

        //During the upgrade time, the clearing of stored statements(including 
        // trigger action spses) happened conditionally before DERBY-4835 was 
        // fixed. DERBY-4835 made changes so that the stored statements get 
        // marked invalid unconditionally during the upgrade phase. But these
        // changes for DERBY-4835 did not make into 10.5.1.1, 10.5.3.0, 
        // 10.6.1.0 and 10.6.2.1. Because of this missing fix, trigger 
        // action spses do not get marked invalid when the database is taken 
        // after soft upgrade back to the original db release(if the original 
        // db release is one of the releases mentioned above). Following test 
        // relies on trigger action spses getting invalid during upgrade phase 
        // and getting recompiled when they are fired next time around thus 
        // altering the number of rows in sysdepends. Because of this, I have
        // disabled this test for those 4 releases.
        if (oldIs(10,5,1,1) || oldIs(10,5,3,0) ||
        	oldIs(10,6,1,0) || oldIs(10,6,2,1))
            		return;
    
    	Statement s = createStatement();
    	ResultSet rs;
        
        switch ( getPhase() )
        {
        case PH_SOFT_UPGRADE:
        case PH_HARD_UPGRADE:
        case PH_POST_HARD_UPGRADE:
        case PH_POST_SOFT_UPGRADE:
        	//Run the results on the data setup by the earlier upgrade phase.
        	// For the CREATE phase, we won't do this because CREATE is the
        	// first phase and hence there won't be any data setup already.
        	//For all the other phases, we want to know how the change in
        	// phase affects the behavior of ALTER TABLE DROP COLUMN
            dropColumn_triggersql_DERBY5044_And_DERBY5120(s);
            //After the above testing, go to the following code where we
            // set up the data all over again in the current phase and see
            // how ALTER TABLE DROP COLUMN behaves.
        case PH_CREATE: 
            //Repeat the whole test in soft upgrade mode. It will work fine
            // because both DERBY-5120 and DERBY-5044 are fixed. As a result,
            // ALTER TABLE DROP COLUMN will detect dependency of TAB1_TRG1 
            // on column getting dropped and hence will drop trigger 
            // TAB1_TRG1.
        	//Setup data for the test
        	preapreForDERBY5044_And_DERBY5120();
           	//Execute a sql which will fire the relevant triggers. 
            triggersql_for_DERBY5044_And_DERBY5120(s);
            dropColumn_triggersql_DERBY5044_And_DERBY5120(s);

            //Recreate the test data so we can test ALTER TABLE DROP COLUMN
            // behavior in the next phase for the data setup by this phase.
            preapreForDERBY5044_And_DERBY5120();
        	triggersql_for_DERBY5044_And_DERBY5120(s);

        	//Now, take this data to the next upgrade phase and check
            // ALTER TABLE DROP COLUMN behavior
            break;
        }
    }

    //Test for combination of DERBY-5120 and DERBY-5044. ALTER TABLE DROP 
    // COLUMN will detect the trigger dependency in this test only in a 
    // release with both DERBY-5120 and DERBY-5044 fixes.
    private void dropColumn_triggersql_DERBY5044_And_DERBY5120(
    		Statement s) throws Exception
    {
    	ResultSet rs;

    	//If we are in soft/hard/post-hard upgrade mode, then ALTER TABLE
    	// DROP COLUMN will find out that trigger TAB1_TRG1 is dependent 
    	// on the column being dropped. But this won't be detected in 
    	// create/post-softupgrade modes because of missing fixes for
    	// DERBY-5120 and DERBY-5044.
        switch ( getPhase() )
        {
        case PH_CREATE: 
        case PH_POST_SOFT_UPGRADE:
        	//For the CREATE and PH_POST_SOFT_UPGRADE upgrade phases, 
        	// ALTER TABLE DROP COLUMN will not detect that trigger 
        	// TAB1_TRG1 depends on the column being dropped except
        	// in 10.8.2.2 and higher releases where DERBY-5044 and
        	// DERBY-5120 have already been fixed.
        	s.executeUpdate("alter table BKUP1_5044_5120 drop column c112");
            if (oldLessThan(10,8,2,2)) {
                //Since in releases prior to 10.8.2.2, ALTER TABLE DROP COLUMN 
                // did not drop dependent trigger, following UPDATE sql will fail 
                // for those releases because trigger TAB1_TRG1 will get fired. 
                // Trigger TAB1_TRG1 will fail because it is expecting more column 
                // in BKUP1_5044_5120 than are actually available
            	assertStatementError("42802", s, " update TAB1_5044_5120 set c11=999");
                //Confirm the behavior mentioned by looking at the table data
            	rs = s.executeQuery("select * from TAB1_5044_5120");
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"99","11"}});        		
            } else {
            	//10.8.2.2 and higher will work fine because DERBY-5044 and
            	// DERBY-5120 have been fixed in those releases.
                s.execute("update TAB1_5044_5120 set c11=999");
                //Confirm the behavior mentioned by looking at the table data
            	rs = s.executeQuery("select * from TAB1_5044_5120");
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"999","11"}});        		
            }
        	
            //No row in BKUP1_5044_5120 because update failed
        	rs = s.executeQuery("select * from BKUP1_5044_5120");
            JDBC.assertEmpty(rs);
        	break;

        case PH_SOFT_UPGRADE:
        case PH_HARD_UPGRADE:
        case PH_POST_HARD_UPGRADE:
        	//Because both DERBY-5120 and DERBY-5044 are fixed, following 
        	// will drop trigger TAB1_TRG1 which is dependent on the column 
        	// being dropped.
            s.executeUpdate("alter table BKUP1_5044_5120 drop column c112");
            //Following triggering sql will not fail because trigger TAB1_TRG1
            // doesn't exist anymore
        	s.executeUpdate("update TAB1_5044_5120 set c11=999");
            //Confirm the behavior mentioned by looking at the table data
        	rs = s.executeQuery("select * from TAB1_5044_5120");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{"999","11"}});        		
            //No row in BKUP1_5044_5120 because trigger which insetts data in
            // this table got dropped as a result of ALTER TABLE DROP COLUMN
        	rs = s.executeQuery("select * from BKUP1_5044_5120");
            JDBC.assertEmpty(rs);
            break;
        }
    }

    //Prepare tables and data for DERBY-5120 and DERBY-5044
    private void preapreForDERBY5044_And_DERBY5120() throws Exception
    {
        Statement s = createStatement();
        boolean modeDb2SqlOptional = oldAtLeast(10, 3);

        dropTable("TAB1_5044_5120");
        dropTable("BKUP1_5044_5120");
        s.execute("create table TAB1_5044_5120(c11 int, c12 int)");
        s.execute("insert into TAB1_5044_5120 values (1,11)");
        s.execute("create table BKUP1_5044_5120(c111 int, c112 int)");
        s.execute("create trigger TAB1_TRG1 after update "+
           		"of C11 on TAB1_5044_5120 REFERENCING old_table as old " +
           		"for each statement " + 
       			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
                "insert into BKUP1_5044_5120 select * from old");
        //Even though following trigger really doesn't do anything meaninful,
        // we still need it to make DERBY-5120 kick-in. Do not remove this
        // trigger. Creation of following trigger is going to mark the
        // earlier trigger invalid and we need that to make sure DERBY-5120
        // scenario kicks in
        s.execute("create trigger TAB1_TRG2 after update " + 
                "on TAB1_5044_5120 for each row " + 
     			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
                "values(1,2)");
    }

    //Execute the trigger which will fire the triggers. Check the data
    // to make sure that the triggers fired correctly.
    private void triggersql_for_DERBY5044_And_DERBY5120(
    		Statement s) throws Exception
	{
    	ResultSet rs;
    	
    	//Confirm the data and the number of rows in the tables which
    	// will be touched by the triggering sql and firing trigger
    	rs = s.executeQuery("select * from TAB1_5044_5120");
        JDBC.assertFullResultSet(rs,
           		new String[][]{{"1","11"}});        		
    	rs = s.executeQuery("select * from BKUP1_5044_5120");
        JDBC.assertEmpty(rs);
        //Following triggering sql will fire triggers
    	s.executeUpdate("update TAB1_5044_5120 set c11=99");
    	//The content of following table changed by the triggering sql
    	rs = s.executeQuery("select * from TAB1_5044_5120");
        JDBC.assertFullResultSet(rs,
           		new String[][]{{"99","11"}});        		
        //The firing trigger inserted row into BKUP1_5044_5120
    	rs = s.executeQuery("select * from BKUP1_5044_5120");
        JDBC.assertFullResultSet(rs,
           		new String[][]{{"1","11"}});
        //Clean data for next test
    	s.executeUpdate("delete from BKUP1_5044_5120");
	}

    /**
     * DERBY-5044(ALTER TABLE DROP COLUMN will not detect triggers defined 
     *  on other tables with their trigger action using the column being 
     *  dropped)
     *  
     * ALTER TABLE DROP COLUMN should detect triggers defined on other table
     *  but using the table being altered in their trigger action. If the 
     *  column getting dropped is used in such a trigger, then ALTER TABLE
     *  DROP COLUMN .. RESTRICT should fail and ALTER TABLE DROP COLUMN ..
     *  CASCADE should drop such triggers.
     */
    public void testDERBY5044AlterTableDropColumn() throws Exception {
    	// ALTER TABLE DROP COLUMN was introduced in 10.3 so no point running
    	// this test with earlier releases
    	if (!oldAtLeast(10, 3)) return;

    	Statement s = createStatement();
    	ResultSet rs;
        
        switch ( getPhase() )
        {
        case PH_CREATE: 
        case PH_POST_SOFT_UPGRADE:
        	//Get data ready for the test
        	preapreFortDERBY5044();
        	//After the setup, verify the number of rows in the tables who
        	// will be impacted by subsequent trigger firing.
        	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{"1","11"}});        		
        	rs = s.executeQuery("select * from ATDC_13_TAB2");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{"1","11"}});

            //Following will fire 2 triggers which will delete rows from
            // the two tables whose row count we checked earlier.
            s.executeUpdate("update ATDC_13_TAB1 set c12=999");
            //There should be no data in the following tables as a result
            // of triggers which were fired by the UPDATE sql above
        	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
            JDBC.assertEmpty(rs);
        	rs = s.executeQuery("select * from ATDC_13_TAB2");
            JDBC.assertEmpty(rs);
            //Reload the data for the next test
            s.execute("insert into ATDC_13_TAB1_BACKUP values (1,11)");
            s.execute("insert into ATDC_13_TAB2 values (1,11)");

            if (oldLessThan(10,8,2,2)) {
                //In releases prior to 10.8.2.2, following does not detect 
            	// that column c22 is getting used by trigger 
            	// ATDC_13_TAB1_trg2 defined on ATDC_13_TAB1
                s.executeUpdate("alter table ATDC_13_TAB2 drop column c22 " +
                		"restrict");
                //Following will fail because trigger ATDC_13_TAB1_trg2 will be
                // fired and it will detect that column ATDC_13_TAB2.c22 getting
                // used in it's trigger action does not exist anymore
                assertStatementError("42X04", s,
                   		"update ATDC_13_TAB1 set c12=999");
                //The number of rows in the tables above didn't change because 
                // UPDATE sql above failed and hence triggers didn't fire.
            	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","11"}});        		
            	rs = s.executeQuery("select * from ATDC_13_TAB2");
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1"}});
            } else {
            	//10.8.2.2 and higher will work fine because DERBY-5044 has
            	// been fixed in those releases.
                assertStatementError("X0Y25", s,
                		"alter table ATDC_13_TAB2 drop column c22 restrict");
            	s.executeUpdate("update ATDC_13_TAB1 set c12=999");
            	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
                JDBC.assertEmpty(rs);
            	rs = s.executeQuery("select * from ATDC_13_TAB2");
                JDBC.assertEmpty(rs);
            }
        	break;

        case PH_SOFT_UPGRADE:
        case PH_HARD_UPGRADE:
        case PH_POST_HARD_UPGRADE:
        	//Get data ready for the test
        	preapreFortDERBY5044();
        	//After the setup, verify the number of rows in the tables who
        	// will be impacted by subsequent trigger firing.
        	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{"1","11"}});        		
        	rs = s.executeQuery("select * from ATDC_13_TAB2");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{"1","11"}});

            //Following will fire 2 triggers which will delete rows from
            // the two tables whose row count we checked earlier.
        	s.executeUpdate("update ATDC_13_TAB1 set c12=999");
            //There should be no data in the following tables as a result
            // of triggers which were fired by the UPDATE sql above
        	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
            JDBC.assertEmpty(rs);  
        	rs = s.executeQuery("select * from ATDC_13_TAB2");
            JDBC.assertEmpty(rs);  
            //Reload the data for the next test
            s.execute("insert into ATDC_13_TAB1_BACKUP values (1,11)");
            s.execute("insert into ATDC_13_TAB2 values (1,11)");

            //With the fix DERBY-5044, following ALTER TABLE DROP COLUMN 
            // will detect that trigger ATDC_13_TAB1_trg2 is using
            // the column being dropped and hence ALTER TABLE will fail.
            assertStatementError("X0Y25", s,
            		"alter table ATDC_13_TAB2 drop column c22 restrict");
        	//Verify the number of rows in the tables who will be impacted 
            // by subsequent trigger firing.
        	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{"1","11"}});        		
        	rs = s.executeQuery("select * from ATDC_13_TAB2");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{"1","11"}});
            //Following will fire 2 triggers which will delete rows from
            // the two tables whose row count we checked earlier.
        	s.executeUpdate("update ATDC_13_TAB1 set c12=999");
            //There should be no data in the following tables as a result
            // of triggers which were fired by the UPDATE sql above
        	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
            JDBC.assertEmpty(rs);  
        	rs = s.executeQuery("select * from ATDC_13_TAB2");
            JDBC.assertEmpty(rs);  
            s.execute("insert into ATDC_13_TAB1_BACKUP values (1,11)");
            s.execute("insert into ATDC_13_TAB2 values (1,11)");
            
            //This time, issue ALTER TABLE DROP COLUMN in CASCADE mode.
            // This should drop the dependent trigger ATDC_13_TAB1_trg2
            s.executeUpdate("alter table ATDC_13_TAB2 drop column c22 ");
            //Verify that trigger ATDC_13_TAB1_trg2 got dropped by issuing
            // the trigger sql which would normally cause firing of 
            // ATDC_13_TAB1_trg2.
        	s.executeUpdate("update ATDC_13_TAB1 set c12=999");
        	//sql above caused ATDC_13_TAB1_trg1 to fire which will delete
        	// row from ATDC_13_TAB1_BACKUP
        	rs = s.executeQuery("select * from ATDC_13_TAB1_BACKUP");
            JDBC.assertEmpty(rs);  
            //But the row from ATDC_13_TAB2 will not be deleted because
            // trigger ATDC_13_TAB1_trg2 does not exist anymore. Notice
            // though that ATDC_13_TAB2 now has only one column rather than 2
        	rs = s.executeQuery("select * from ATDC_13_TAB2");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{"1"}});
        	break;
        }
    }

    public void preapreFortDERBY5044() throws Exception
    {
        Statement s = createStatement();
        boolean modeDb2SqlOptional = oldAtLeast(10, 3);

        dropTable("ATDC_13_TAB1");
        dropTable("ATDC_13_TAB1_BACKUP");
        dropTable("ATDC_13_TAB2");
        s.execute("create table ATDC_13_TAB1(c11 int, c12 int)");
        s.execute("insert into ATDC_13_TAB1 values (1,11)");
        s.execute("create table ATDC_13_TAB1_BACKUP(c11 int, c12 int)");
        s.execute("insert into ATDC_13_TAB1_BACKUP values (1,11)");
        s.execute("create table ATDC_13_TAB2(c21 int, c22 int)");
        s.execute("insert into ATDC_13_TAB2 values (1,11)");
        s.executeUpdate(
                " create trigger ATDC_13_TAB1_trg1 after update " +
                "on ATDC_13_TAB1 for each row " +
    			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
                "DELETE FROM ATDC_13_TAB1_BACKUP " +
                "WHERE C12>=1");
        s.executeUpdate(
                " create trigger ATDC_13_TAB1_trg2 after update " +
                "on ATDC_13_TAB1 for each row " +
    			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
                "DELETE FROM ATDC_13_TAB2 WHERE "+
                "C22 IN (values(11))");
    }
    
    /**
     * Changes made for DERBY-1482 caused corruption which is being logged 
     *  under DERBY-5121. The issue is that the generated trigger action
     *  sql could be looking for columns (by positions, not names) in
     *  incorrect positions. With DERBY-1482, trigger assumed that the
     *  runtime resultset that they will get will only have trigger columns
     *  and trigger action columns used through the REFERENCING column.
     *  That is an incorrect assumption because the resultset could have
     *  more columns if the triggering sql requires more columns. DERBY-1482
     *  changes are in 10.7 and higher codelines. Because of this bug, the
     *  changes for DERBY-1482 have been backed out from 10.7 and 10.8
     *  codelines so they now match 10.6 and earlier releases. This in 
     *  other words means that the resultset presented to the trigger
     *  will have all the columns from the trigger table and the trigger
     *  action generated sql should look for the columns in the trigger
     *  table by their absolution column position in the trigger table.
     *  This disabling of code will make sure that all the future triggers
     *  get created correctly. The existing triggers at the time of 
     *  upgrade (to the releases with DERBY-1482 backout changes in them)
     *  will get marked invalid and when they fire next time around,
     *  the regenerated sql for them will be generated again and they
     *  will start behaving correctly. So, it is highly recommended that
     *  we upgrade 10.7.1.1 to next point release of 10.7 or to 10.8
     * @throws Exception
     */
    public void testDERBY5121TriggerDataCorruption() throws Exception
    {
        Statement s = createStatement();
        ResultSet rs;
        boolean modeDb2SqlOptional = oldAtLeast(10, 3);
        
        switch ( getPhase() )
        {
        case PH_CREATE: // create with old version
        	//The following test case is for testing in different upgrade
        	// phases what happens to buggy trigger created with 10.7.1.1. 
        	// Such triggers will get fixed
        	// 1)in hard upgrade when they get fired next time around.
        	// 2)in soft upgrade if they get fired during soft upgrade session.
        	//For all the other releases, we do not generate buggy triggers
        	// and hence everything should work just fine during all phases
        	// of upgrade including the CREATE time
            s.execute("CREATE TABLE UPGRADE_tab1(id int, name varchar(20))");
            s.execute("CREATE TABLE UPGRADE_tab2(" +
            		"name varchar(20) not null, " +
            		"description int not null, id int)");
            s.execute("create trigger UPGRADE_Trg1 " +
            		"after UPDATE of name on UPGRADE_tab2 " +
            		"referencing new as nr for each ROW "+
                    (modeDb2SqlOptional?"":"MODE DB2SQL ") +
                    "insert into UPGRADE_tab1 values ( nr.id, nr.name )");
            //load data into trigger table
            s.execute("insert into UPGRADE_tab2(name,description) "+
            		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update UPGRADE_tab2 " +
        			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from UPGRADE_tab1");
        	//If we are testing 10.7.1.1, which is where DERBY-5121 was
        	// detected, we will find that the trigger did not insert
        	// the correct data thus causing the corruption. For all the
        	// earlier releases, we do not have DERBY-5121 and hence
        	// trigger will insert the correct data.
        	if (oldIs(10,7,1,1))
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","Another name"}});        		
        	else
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{null,"Another name"}});
        	s.execute("delete from UPGRADE_tab1");
        	s.execute("delete from UPGRADE_tab2");

        	//Following test is to test that the buggy triggers created in 
        	// 10.7.1.1 will continue to exhibit incorrect behavior if they 
        	// do not get fired during soft upgrade and the database is taken
        	// back to 10.7.1.1
            s.execute("CREATE TABLE POSTSFT_UPGRD_tab1(id int, name varchar(20))");
            s.execute("CREATE TABLE POSTSFT_UPGRD_tab2(" +
            		"name varchar(20) not null, " +
            		"description int not null, id int)");
            //We want this trigger to fire only for post hard upgrade
            s.execute("create trigger POSTSFT_UPGRD_Trg1 " +
            		"after UPDATE of name on POSTSFT_UPGRD_tab2 " +
            		"referencing new as nr for each ROW "+
                    (modeDb2SqlOptional?"":"MODE DB2SQL ") +
                    "insert into POSTSFT_UPGRD_tab1 values ( nr.id, nr.name )");
            //load data into trigger table
            s.execute("insert into POSTSFT_UPGRD_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update POSTSFT_UPGRD_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from POSTSFT_UPGRD_tab1");
        	//If we are testing 10.7.1.1, which is where DERBY-5121 was
        	// detected, we will find that the trigger did not insert
        	// the correct data thus causing the corruption. For all the
        	// earlier releases, we do not have DERBY-5121 and hence
        	// trigger will insert the correct data.
        	if (oldIs(10,7,1,1))
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","Another name"}});
        	else
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{null,"Another name"}});
        	s.execute("delete from POSTSFT_UPGRD_tab1");
        	s.execute("delete from POSTSFT_UPGRD_tab2");

        	//Following test is to test that the buggy triggers created in
        	// 10.7.1.1 will get fixed when they get upgraded to 10.8 and 
        	// higher
            s.execute("CREATE TABLE HARD_UPGRADE_tab1(id int, name varchar(20))");
            s.execute("CREATE TABLE HARD_UPGRADE_tab2(" +
            		"name varchar(20) not null, " +
            		"description int not null, id int)");
            s.execute("create trigger HARD_UPGRADE_Trg1 " +
            		"after UPDATE of name on HARD_UPGRADE_tab2 " +
            		"referencing new as nr for each ROW "+
                    (modeDb2SqlOptional?"":"MODE DB2SQL ") +
                    "insert into HARD_UPGRADE_tab1 values ( nr.id, nr.name )");
            //load data into trigger table
            s.execute("insert into HARD_UPGRADE_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update HARD_UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from HARD_UPGRADE_tab1");
        	//If we are testing 10.7.1.1, which is where DERBY-5121 was
        	// detected, we will find that the trigger did not insert
        	// the correct data thus causing the corruption. For all the
        	// earlier releases, we do not have DERBY-5121 and hence
        	// trigger will insert the correct data.
        	if (oldIs(10,7,1,1))
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","Another name"}});        		
        	else
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{null,"Another name"}});
        	s.execute("delete from HARD_UPGRADE_tab1");
        	s.execute("delete from HARD_UPGRADE_tab2");

        	//Following test is to test that the buggy triggers created in
        	// 10.7.1.1 will get fixed when they get upgraded to 10.8 and 
        	// higher even if they did not get fired during the session which
        	// did the upgrade
            s.execute("CREATE TABLE POSTHRD_UPGRD_tab1(id int, name varchar(20))");
            s.execute("CREATE TABLE POSTHRD_UPGRD_tab2(" +
            		"name varchar(20) not null, " +
            		"description int not null, id int)");
            //We want this trigger to fire only for post hard upgrade
            s.execute("create trigger POSTHRD_UPGRD_Trg1 " +
            		"after UPDATE of name on POSTHRD_UPGRD_tab2 " +
            		"referencing new as nr for each ROW "+
                    (modeDb2SqlOptional?"":"MODE DB2SQL ") +
                    "insert into POSTHRD_UPGRD_tab1 values ( nr.id, nr.name )");
            //load data into trigger table
            s.execute("insert into POSTHRD_UPGRD_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update POSTHRD_UPGRD_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from POSTHRD_UPGRD_tab1");
        	//If we are testing 10.7.1.1, which is where DERBY-5121 was
        	// detected, we will find that the trigger did not insert
        	// the correct data thus causing the corruption. For all the
        	// earlier releases, we do not have DERBY-5121 and hence
        	// trigger will insert the correct data.
        	if (oldIs(10,7,1,1))
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","Another name"}});
        	else
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{null,"Another name"}});
        	s.execute("delete from POSTHRD_UPGRD_tab1");
        	s.execute("delete from POSTHRD_UPGRD_tab2");
            break;
            
        case PH_SOFT_UPGRADE:
        	//Following test case shows that the buggy trigger created in
        	// 10.7.1.1 got fixed when it got fired in soft upgrade mode
            //load data into trigger table
            s.execute("insert into UPGRADE_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from UPGRADE_tab1");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{null,"Another name"}});
        	s.execute("delete from UPGRADE_tab1");
        	s.execute("delete from UPGRADE_tab2");
        	s.execute("drop trigger UPGRADE_Trg1");

        	//Following test case shows that the trigger created during
        	// soft upgrade mode behave correctly and will not exhibit
        	// the buggy behavior of 10.7.1.1
        	s.execute("create trigger UPGRADE_Trg1 " +
            		"after UPDATE of name on UPGRADE_tab2 " +
            		"referencing new as nr for each ROW "+
                    (modeDb2SqlOptional?"":"MODE DB2SQL ") +
                    "insert into UPGRADE_tab1 values ( nr.id, nr.name )");
            //load data into trigger table
            s.execute("insert into UPGRADE_tab2(name,description) "+
            		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from UPGRADE_tab1");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{null,"Another name"}});
        	s.execute("delete from UPGRADE_tab1");
        	s.execute("delete from UPGRADE_tab2");
            break;

        case PH_POST_SOFT_UPGRADE: 
        	//Following test shows that because the buggy trigger created in
        	// 10.7.1.1 was fired during the soft upgrade mode, it has gotten
        	// fixed and it will work correctly in all the releaes
            //load data into trigger table
            s.execute("insert into UPGRADE_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from UPGRADE_tab1");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{null,"Another name"}});
        	s.execute("delete from UPGRADE_tab1");
        	s.execute("delete from UPGRADE_tab2");
        	s.execute("drop trigger UPGRADE_Trg1");

        	//Following test case says that if we are back to 10.7.1.1 after
        	// soft upgrade, we will continue to create buggy triggers. The
        	// only solution to this problem is to upgrade to a release that
        	// fixes DERBY-5121
        	s.execute("create trigger UPGRADE_Trg1 " +
            		"after UPDATE of name on UPGRADE_tab2 " +
            		"referencing new as nr for each ROW "+
                    (modeDb2SqlOptional?"":"MODE DB2SQL ") +
                    "insert into UPGRADE_tab1 values ( nr.id, nr.name )");
            //load data into trigger table
            s.execute("insert into UPGRADE_tab2(name,description) "+
            		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from UPGRADE_tab1");
        	//If we are testing 10.7.1.1, which is where DERBY-5121 was
        	// detected, we will find that the trigger did not insert
        	// the correct data thus causing the corruption. For all the
        	// earlier releases, we do not have DERBY-5121 and hence
        	// trigger will insert the correct data.
        	if (oldIs(10,7,1,1))
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","Another name"}});        		
        	else
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{null,"Another name"}});
        	s.execute("delete from UPGRADE_tab1");
        	s.execute("delete from UPGRADE_tab2");

        	//Following shows that the triggers that didn't get fired during
        	// soft upgrade will continue to exhibit incorrect behavior in
        	// 10.7.1.1. The only solution to this problem is to upgrade to a 
        	// release that fixes DERBY-5121
        	//load data into trigger table
            s.execute("insert into POSTSFT_UPGRD_tab2(name,description) "+
            		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update POSTSFT_UPGRD_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from POSTSFT_UPGRD_tab1");
        	if (oldIs(10,7,1,1))
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","Another name"}});        		
        	else
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{null,"Another name"}});
        	s.execute("delete from POSTSFT_UPGRD_tab1");
        	s.execute("delete from POSTSFT_UPGRD_tab2");

        	//Following shows that the triggers that didn't get fired during
        	// soft upgrade will continue to exhibit incorrect behavior in
        	// 10.7.1.1. The only solution to this problem is to upgrade to a 
        	// release that fixes DERBY-5121
            //load data into trigger table
            s.execute("insert into HARD_UPGRADE_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update HARD_UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from HARD_UPGRADE_tab1");
        	if (oldIs(10,7,1,1))
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","Another name"}});        		
        	else
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{null,"Another name"}});
        	s.execute("delete from HARD_UPGRADE_tab1");
        	s.execute("delete from HARD_UPGRADE_tab2");

        	//Following shows that the triggers that didn't get fired during
        	// soft upgrade will continue to exhibit incorrect behavior in
        	// 10.7.1.1. The only solution to this problem is to upgrade to a 
        	// release that fixes DERBY-5121
            //load data into trigger table
            s.execute("insert into POSTHRD_UPGRD_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update POSTHRD_UPGRD_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from POSTHRD_UPGRD_tab1");
        	if (oldIs(10,7,1,1))
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{"1","Another name"}});        		
        	else
                JDBC.assertFullResultSet(rs,
                   		new String[][]{{null,"Another name"}});
        	s.execute("delete from POSTHRD_UPGRD_tab1");
        	s.execute("delete from POSTHRD_UPGRD_tab2");
            break;
            
        case PH_HARD_UPGRADE:
        	//Following test shows that the buggy trigger created with 10.7.1.1
        	// will get fixed after hard upgrade. Following trigger was fired
        	// during soft upgrade and post soft upgrade
            //load data into trigger table
            s.execute("insert into UPGRADE_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from UPGRADE_tab1");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{null,"Another name"}});
        	s.execute("delete from UPGRADE_tab1");
        	s.execute("delete from UPGRADE_tab2");

        	//Following test shows that the buggy trigger created with 10.7.1.1
        	// will get fixed after hard upgrade. Following trigger was never
        	// fired in soft upgrade mode
            //load data into trigger table
            s.execute("insert into HARD_UPGRADE_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update HARD_UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from HARD_UPGRADE_tab1");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{null,"Another name"}});
        	s.execute("delete from HARD_UPGRADE_tab1");
        	s.execute("delete from HARD_UPGRADE_tab2");
            break;
            
        case PH_POST_HARD_UPGRADE:
        	//Following test shows that the buggy trigger created with 10.7.1.1
        	// will get fixed after hard upgrade. Following trigger was fired
        	// during soft upgrade and post soft upgrade & during hard upgrade
            //load data into trigger table
            //load data into trigger table
            s.execute("insert into UPGRADE_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from UPGRADE_tab1");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{null,"Another name"}});
        	s.execute("delete from UPGRADE_tab1");
        	s.execute("delete from UPGRADE_tab2");

        	//Following test shows that the buggy trigger created with 10.7.1.1
        	// will get fixed after hard upgrade. Following trigger was never
        	// fired in soft upgrade mode but was fired during hard upgrade
            //load data into trigger table
            //load data into trigger table
            s.execute("insert into HARD_UPGRADE_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update HARD_UPGRADE_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from HARD_UPGRADE_tab1");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{null,"Another name"}});
        	s.execute("delete from HARD_UPGRADE_tab1");
        	s.execute("delete from HARD_UPGRADE_tab2");

        	//Following test shows that the buggy trigger created with 10.7.1.1
        	// will get fixed after hard upgrade. This is the first time this
        	// trigger got fired after it's creation in 10.7.1.1 CREATE mode
            //load data into trigger table
            //load data into trigger table
            s.execute("insert into POSTHRD_UPGRD_tab2(name,description) "+
    		"values ( 'Foo1 Name', 0 )");
            //Cause the trigger to fire
        	s.execute("update POSTHRD_UPGRD_tab2 " +
			"set name = 'Another name' , description = 1");
        	rs = s.executeQuery("select * from POSTHRD_UPGRD_tab1");
            JDBC.assertFullResultSet(rs,
               		new String[][]{{null,"Another name"}});
        	s.execute("delete from POSTHRD_UPGRD_tab1");
        	s.execute("delete from POSTHRD_UPGRD_tab2");
            break;
        }
    }

    //This test creates a table with LOB column and insets large data
    // into that column. There is a trigger defined on this table
    // but the trigger does not need access to the LOB column. In 10.8 
    // and prior releases, even though we don't need the LOB column to
    // execute the trigger, we still read all the columns from the 
    // trigger table when the trigger fired. With 10.9, only the columns 
    // required by the firing triggers are read from the trigger table
    // and hence for our test here, LOB column will not be materialized. 
    //In 10.8 and prior releases, the trigger defined in this test can
    // run into OOM errors depending on how much heap is available to
    // the upgrade test. But in 10.9 and higher, that won't happen
    // because LOB is never read into memory for the trigger being
    // used by this test.
    public void atestTriggersWithLOBcolumns() throws Exception
    {
        Statement s = createStatement();
        ResultSet rs;
        boolean modeDb2SqlOptional = oldAtLeast(10, 3);
    	final int lobsize = 50000*1024;
        
        switch ( getPhase() )
        {
        case PH_CREATE: // create with old version
    		s.execute("create table table1LOBtest (id int, status smallint, bl blob(2G))");
    		PreparedStatement ps = prepareStatement(
    		"insert into table1LOBtest values (?, 0, ?)");
    		ps.setInt(1, 1);
            ps.setBinaryStream(2, new LoopingAlphabetStream(lobsize), lobsize);
            ps.executeUpdate();
            
    		s.execute("create table table2LOBtest (id int, updates int default 0)");
    		ps = prepareStatement(
    				"insert into table2LOBtest (id) values (?)");
    		ps.setInt(1, 1);
            ps.executeUpdate();

            s.execute("create trigger trigger1 after update of status on table1LOBtest referencing " +
    				"new as n_row for each row " +
        			(modeDb2SqlOptional?"":"MODE DB2SQL ") +
    				"update table2LOBtest set updates = updates + 1 where table2LOBtest.id = n_row.id");
            break;
            
        case PH_HARD_UPGRADE:
            //In 10.8 and prior releases, the trigger defined in this test can
            // run into OOM errors depending on how much heap is available to
            // the upgrade test. The reason for this is that 10.8 and prior
        	// read all the columns from the trigger table whether or not the
        	// firing triggers needed them. Since the table in this test has a
        	// LOB column, it can cause 10.8 and prior to run into OOM. But in 
        	// 10.9 and higher, that won't happen because LOB is never accessed
        	// by the trigger defined here, it will not be read into memory and
        	// will not cause OOM. For this reason, there is an IF condition
        	// below before we issue a triggering sql which could result into
        	// OOM in 10.8 and prior
        	if ((getConnection().getMetaData().getDatabaseMajorVersion() >= 10) &&
        	(getConnection().getMetaData().getDatabaseMinorVersion() >= 9))
        	{
        		ps = prepareStatement(
        				"update table1LOBtest set status = 1 where id = 1");
        		ps.executeUpdate();
        	}
            break;
        }
    }
    
    final   int TEST_COUNT = 0;
    final   int FAILURES = TEST_COUNT + 1;
    final   String  A_COL = "a";
    final   String  B_COL = "b";

    //This test has been contributed by Rick Hillegas for DERBY-5121
    // The test exhaustively walks through all subsets and permutations 
    // of columns for a trigger which inserts into a side table based on 
    // updates to a master table.
    public void testExhuastivePermutationOfTriggerColumns() throws Exception
    {
        final   int STATUS_COUNTERS = FAILURES + 1;
        int columnCount = 3;
        int[][]   powerSet = constructPowerSet( columnCount );
        int[][] permutations = permute( powerSet );
        int[]   statusCounters = new int[ STATUS_COUNTERS ];

        switch ( getPhase() )
        {
        case PH_CREATE: // create with old version
            for ( int triggerCols = 0; triggerCols < powerSet.length; triggerCols++ )
            {
                for ( int perm = 0; perm < permutations.length; perm++ )
                {
                    createT1( powerSet[ triggerCols ], permutations[ perm ] );
                    createT2( columnCount, powerSet[ triggerCols ], permutations[ perm ]  );
                    createTrigger( powerSet[ triggerCols ], permutations[ perm ] );
                }
            }
        	break;

        case PH_SOFT_UPGRADE:
            for ( int triggerCols = 0; triggerCols < powerSet.length; triggerCols++ )
            {
                for ( int perm = 0; perm < permutations.length; perm++ )
                {
                    for ( int i = 0; i < permutations.length; i++ )
                    {
                        runTrigger( statusCounters, columnCount, powerSet[ triggerCols ], permutations[ perm ], permutations[ i ] );
                    }
                }
            }
        	break;
        }
        summarize( statusCounters );
    }
    
    //Start of helper methods for testExhuastivePermutationOfTriggerColumns

    ////////////////////////
    //
    // make power set of N
    //
    ////////////////////////

    private int[][] constructPowerSet( int count )
    {
    	ArrayList<int[]> list = new ArrayList<int[]>();
        boolean[]           inclusions = new boolean[ count ];

        include( list, 0, inclusions );
        
        int[][] result = new int[ list.size() ][];
        list.toArray( result );

        return result;
    }

    private void include( ArrayList<int[]> list, int idx, boolean[] inclusions )
    {
        if ( idx >= inclusions.length )
        {
            int totalLength = inclusions.length;
            int count = 0;
            for ( int i = 0; i < totalLength; i++ )
            {
                if ( inclusions[ i ] ) { count++; }
            }

            if ( count > 0 )
            {
                int[]   result = new int[ count ];
                int     index = 0;
                for ( int i = 0; i < totalLength; i++ )
                {
                    if ( inclusions[ i ] ) { result[ index++ ] = i; }
                }
                
                list.add( result );
            }

            return;
        }

        include( list, idx, inclusions, false );
        include( list, idx, inclusions, true );
    }

    private void include(ArrayList<int[]> list, int idx, boolean[] inclusions,
                         boolean currentCell)
    {
        inclusions[ idx++ ] = currentCell;

        // this is where the recursion happens
        include( list, idx, inclusions );
    }

    ////////////////////////////////////////////////
    //
    // create all permutations of an array of numbers
    //
    ////////////////////////////////////////////////
    private int[][] permute( int[][] original )
    {
        ArrayList<int[]> list = new ArrayList<int[]>();

        for ( int i = 0; i < original.length; i++ )
        {
            permute( list, new int[0], original[ i ] );
        }
        
        int[][] result = new int[ list.size() ][];
        list.toArray( result );

        return result;
    }

    private void permute( ArrayList<int[]> list, int[] start, int[] remainder )
    {
        int startLength = start.length;
        int remainderLength = remainder.length;
        
        for ( int idx = 0; idx < remainder.length; idx++ )
        {
            int[] newStart = new int[ startLength + 1 ];
            for ( int i = 0; i < startLength; i++ ) { newStart[ i ] = start[ i ]; }
            newStart[ startLength ] = remainder[ idx ];

            if ( remainderLength <= 1 ) { list.add( newStart ); }
            else
            {
                int[]   newRemainder = new int[ remainderLength - 1 ];
                int     index = 0;
                for ( int i = 0; i < remainderLength; i++ )
                {
                    if ( i != idx ) { newRemainder[ index++ ] = remainder[ i ]; }
                }

                // this is where the recursion happens
                permute( list, newStart, newRemainder );
            }
        }   // end loop through all remainder elements
    }

    private String  columnName( String stub, int idx ) { return (stub + '_' + idx ); }

    private void createT1(int[] triggerCols, int[] permutation )
    throws Exception
    {
        StringBuffer   buffer = new StringBuffer();
        buffer.append( "create table " + makeTableName( "t1", triggerCols, permutation ) + "( " );
        for ( int i = 0; i < permutation.length; i++ )
        {
            if ( i > 0 ) { buffer.append( ", " ); }
            buffer.append( columnName( B_COL, i ) );
            buffer.append( " int" );
        }
        buffer.append( " )" );
        Statement s = createStatement();
        s.execute(buffer.toString());
    }    
    
    private void    createT2(int columnCount, int[] triggerCols, int[] permutation  )
    throws Exception
    {
        StringBuffer   buffer = new StringBuffer();
        buffer.append( "create table " + makeTableName( "t2", triggerCols, permutation ) + "( " );
        for ( int i = 0; i < columnCount; i++ )
        {
            if ( i > 0 ) { buffer.append( ", " ); }
            buffer.append( columnName( A_COL, i ) );
            buffer.append( " int" );
        }
        buffer.append( " )" );
        Statement s = createStatement();
        s.execute(buffer.toString());
    }

    private String  makeTableName( String stub, int[] triggerCols, int[] permutation )
    {
        StringBuffer   buffer = new StringBuffer();

        buffer.append( stub );
        for ( int i = 0; i < triggerCols.length; i++ )
        {
            buffer.append( "_" );
            buffer.append( triggerCols[ i ] );
        }
       buffer.append( "__" );
        for ( int i = 0; i < permutation.length; i++ )
        {
            buffer.append( "_" );
            buffer.append( permutation[ i ] );
        }

        return buffer.toString();
    }

    private void    createTrigger(int[] triggerCols, int[] permutation )
    throws Exception
    {
        boolean modeDb2SqlOptional = oldAtLeast(10, 3);
        StringBuffer   buffer = new StringBuffer();
        buffer.append( "create trigger " + makeTriggerName( "UTrg", triggerCols, permutation ) + " after update of " );
        for ( int i = 0; i < triggerCols.length; i++ )
        {
            if ( i > 0 ) { buffer.append( ", " ); }
            buffer.append( columnName( A_COL, triggerCols[ i ] ) );
        }
        		
        buffer.append( "\n\ton " + makeTableName( "t2", triggerCols, permutation ) + " referencing new as nr for each row " );
        buffer.append( modeDb2SqlOptional?"":"\n\tMODE DB2SQL ");
        buffer.append( "\n\tinsert into " + makeTableName( "t1", triggerCols, permutation ) + " values ( " );
        for ( int i = 0; i < permutation.length; i++ )
        {
            if ( i > 0 ) { buffer.append( ", " ); }
            buffer.append( "nr." + columnName( A_COL, permutation[ i ] ) );
        }
        buffer.append( " )" );

        Statement s = createStatement();
        s.execute(buffer.toString());
    }

    private String  makeTriggerName( String stub, int[] triggerCols, int[] permutation )
    {
        StringBuffer   buffer = new StringBuffer();

        buffer.append( stub );
        for ( int i = 0; i < triggerCols.length; i++ )
        {
            buffer.append( "_" );
            buffer.append( triggerCols[ i ] );
        }
        buffer.append( "__" );
        for ( int i = 0; i < permutation.length; i++ )
        {
            buffer.append( "_" );
            buffer.append( permutation[ i ] );
        }
        
        return buffer.toString();
    }

    private int[]   getResults( int rowLength, String text )
        throws Exception
    {
        PreparedStatement   ps = prepareStatement(text );
        ResultSet               rs = ps.executeQuery();

        if ( !rs.next() ) { return new int[0]; }

        int[]                       result = new int[ rowLength ];
        for ( int i = 0; i < rowLength; i++ )
        {
            result[ i ] = rs.getInt( i + 1 );
        }

        rs.close();
        ps.close();

        return result;
    }

    private boolean overlap( int[] left, int[] right )
    {
        for ( int i = 0; i < left.length; i++ )
        {
            for ( int j = 0; j < right.length; j++ )
            {
                if ( left[ i ] == right[ j ] )
                {
                    //println( true, stringify( left ) + " overlaps " + stringify( right ) );
                    return true;
                }
            }
        }

        //println( true, stringify( left ) + " DOES NOT overlap " + stringify( right ) );
        return false;
    }

    private void    vetData
    ( int[] statusCounters, int[] triggerCols, int[] permutation, int[] updateColumns, String updateStatement )
    throws Exception
    {
        String  t1Name = makeTableName( "t1", triggerCols, permutation );
        String  t2Name = makeTableName( "t2", triggerCols, permutation );
        int     rowLength = permutation.length;
        int[]   t1Row = getResults( rowLength, "select * from " + t1Name );

        if ( !overlap( triggerCols, updateColumns ) )
        {
            if ( t1Row.length != 0 )
            {
                fail
                    (
                     statusCounters,
                     triggerCols,
                     permutation,
                     updateColumns,
                     "No row should have been inserted into t1! updateStatement = '" + updateStatement + "' and t1Row = " + stringify( t1Row )
                     );
            }

            return;
        }
        
        StringBuffer   buffer = new StringBuffer();
        buffer.append( "select " );
        for ( int i = 0; i < permutation.length; i++ )
        {
            if ( i > 0 ) { buffer.append( ", " ); }
            buffer.append( columnName( A_COL, permutation[ i ] ) );
        }
        buffer.append( " from " + t2Name );
        int[]   t2Row = getResults( rowLength, buffer.toString() );

        if ( !stringify( t1Row ).equals( stringify( t2Row ) ) )
        {
            String  detail = "Wrong data inserted into t1! " +
                "updateStatement = '" + updateStatement + "'. " +
                "Expected " + stringify( t2Row ) +
                " but found " + stringify( t1Row );
                
            fail( statusCounters, triggerCols, permutation, updateColumns, detail );
        }
    }

    private void    runTrigger( int[] statusCounters, int columnCount, int[] triggerCols, int[] permutation, int[] updateColumns )
    throws Exception
    {
        statusCounters[ TEST_COUNT ]++;

        loadData( columnCount, triggerCols, permutation );
        String  updateStatement = updateData( statusCounters, triggerCols, permutation, updateColumns );
        vetData( statusCounters, triggerCols, permutation, updateColumns, updateStatement );
    }

    private void    loadData( int columnCount, int[] triggerCols, int[] permutation )
    throws Exception
    {
        String  t1Name = makeTableName( "t1", triggerCols, permutation );
        String  t2Name = makeTableName( "t2", triggerCols, permutation );
        Statement s = createStatement();
        s.execute("delete from " + t1Name);
        s.execute("delete from " + t2Name);
        
        StringBuffer   buffer = new StringBuffer();
        buffer.append( "insert into " + t2Name + " values ( " );
        for ( int i = 0; i < columnCount; i++ )
        {
            if ( i > 0 ) { buffer.append( ", " ); }
            buffer.append( i );
        }
        buffer.append( " )" );
        s.execute(buffer.toString());
    }
    
    private String    updateData( int[] statusCounters, int[] triggerCols, int[] permutation, int[] updateColumns )
    throws Exception
    {
        String  t2Name = makeTableName( "t2", triggerCols, permutation );

        StringBuffer   buffer = new StringBuffer();
        buffer.append( "update " + t2Name + " set " );
        for ( int i = 0; i < updateColumns.length; i++ )
        {
            if ( i > 0 ) { buffer.append( ", " ); }
            buffer.append( columnName( A_COL, updateColumns[ i ] ) );
            buffer.append( " = " );
            buffer.append( (100 + i) );
        }

        String  updateStatement = buffer.toString();

        try {
            Statement s = createStatement();
            s.execute(updateStatement);
        }
        catch (SQLException se)
        {
            fail
                (
                 statusCounters,
                 triggerCols,
                 permutation,
                 updateColumns,
                 "Update statement failed! updateStatement = '" + updateStatement
                 );
        }

        return updateStatement;
    }

    private void    fail( int[] statusCounters, int[] triggerCols, int[] permutation, int[] updateColumns, String detail )
    {
        statusCounters[ FAILURES ]++;
        
        String  message = "FAILED for triggerCols = " +
            stringify( triggerCols ) +
            " and permutation = " + stringify( permutation ) +
            " and updateColumns = " + stringify( updateColumns ) +
            ". " + detail;

        System.out.println( message );
    }
    
    private void    summarize( int[] statusCounters )
    {
        int testCount = statusCounters[ TEST_COUNT ];
        int failures = statusCounters[ FAILURES ];

        if ( failures != 0 )
        {
        	System.out.println( "FAILURE! " + testCount + " test cases run, of which " + failures + " failed." );
        }
    }

    private String    stringify( int[][] array )
    {
        StringBuffer   buffer = new StringBuffer();

        buffer.append( "[" );
        for ( int i = 0; i < array.length; i++ )
        {
            buffer.append( "\n\t" );
            buffer.append( stringify( array[ i ] ) );
        }
        buffer.append( "\n]\n" );

        return buffer.toString();
    }

    private String  stringify( int[] array )
    {
        StringBuffer   buffer = new StringBuffer();

        buffer.append( "[" );
        for ( int j = 0; j < array.length; j++ )
        {
            if ( j > 0 ) { buffer.append( ", " ); }
            buffer.append( array[ j ] );
        }
        buffer.append( "]" );

        return buffer.toString();
    }
    //End of helper methods for testExhuastivePermutationOfTriggerColumns

    /**
     * Test that triggers that use XML operators work after upgrade. The
     * first fix for DERBY-3870 broke upgrade of such triggers because the
     * old execution plans failed to deserialize on the new version.
     */
    public void xmlTestTriggerWithXMLOperators() throws SQLException {
        if (!oldAtLeast(10, 3)) {
            // Before 10.3, the CREATE TRIGGER statement used in the test
            // failed with a syntax error. Skip the test for older versions.
            return;
        }

        Statement s = createStatement();

        if (getPhase() == PH_CREATE) {
            // Create test tables and a trigger that uses XML operators with
            // the old version.
            s.execute("create table d3870_t1(i int, x varchar(100))");
            s.execute("create table d3870_t2(i int)");
            try {
                s.execute("create trigger d3870_tr after insert on d3870_t1 " +
                          "for each statement insert into d3870_t2 " +
                          "select i from d3870_t1 where " +
                          "xmlexists('//a' passing by ref " +
                          "xmlparse(document x preserve whitespace))");
            } catch (SQLException sqle) {
                // The CREATE TRIGGER statement will fail if the XML classpath
                // requirements aren't satisfied for the old version. That's
                // OK, but we'll have to skip the test for this combination.
                assertSQLState("XML00", sqle);
                return;
            }
        } else {
            // Delete the rows to start the test from a known state in each
            // of the phases.
            s.executeUpdate("delete from d3870_t1");
            s.executeUpdate("delete from d3870_t2");
        }

        // Check if the trigger exists. It won't exist if the XML requirements
        // weren't satisfied for the old version. If we don't have the trigger,
        // we skip the rest of the test.
        ResultSet rs = s.executeQuery(
            "select 1 from sys.systriggers where triggername = 'D3870_TR'");
        boolean hasTrigger = rs.next();
        rs.close();

        // Verify that the trigger works both before and after upgrade.
        if (hasTrigger) {
            s.execute("insert into d3870_t1 values " +
                      "(1, '<a/>'), (2, '<b/>'), (3, '<c/>')");

            JDBC.assertSingleValueResultSet(
                    s.executeQuery("select * from d3870_t2"), "1");
        }
    }
    
    /**
     * DERBY-5289 Upgrade could fail during upgrade with triggers due to 
     * failure reading serializable or SQLData object
     * @throws SQLException
     */
    public void testDERBY5289TriggerUpgradeFormat() throws SQLException {
        Statement s = createStatement();
        switch (getPhase())
        {
            case PH_CREATE:
                s.executeUpdate("CREATE TABLE D5289TABLE1 (COL1 VARCHAR(5))");
                s.executeUpdate("CREATE TABLE D5289TABLE2 (COL2 VARCHAR(5))");
                s.executeUpdate("CREATE TABLE D5289TABLE3 (COL3 VARCHAR(5))");
                s.executeUpdate("CREATE TRIGGER D5289T1_UPDATED AFTER UPDATE " +
                        "ON D5289TABLE1 REFERENCING OLD AS OLD NEW AS NEW FOR " +
                        "EACH ROW MODE DB2SQL UPDATE D5289TABLE2 SET COL2 = NEW.COL1 WHERE " +
                        "COL2 = OLD.COL1");
                s.executeUpdate("CREATE TRIGGER D5289T2_UPDATED AFTER UPDATE " + 
                        "ON D5289TABLE2 REFERENCING NEW AS NEW FOR EACH " +
                        "ROW MODE DB2SQL INSERT INTO D5289TABLE3(COL3) VALUES('ccc')");
                s.executeUpdate("insert into D5289TABLE1(COL1) values ('aaa') ");
                s.executeUpdate("insert into D5289TABLE2(COL2) values ('aaa') ");
                s.executeUpdate("UPDATE D5289TABLE1 SET COL1 = 'bbb'");
                assertDERBY5289ResultsAndDelete();
                break;
            case PH_SOFT_UPGRADE:   
            case PH_POST_SOFT_UPGRADE:
            case PH_HARD_UPGRADE:
                s.executeUpdate("insert into D5289TABLE1(COL1) values ('aaa')");
                s.executeUpdate("insert into D5289TABLE2(COL2) values ('aaa') ");
                s.executeUpdate("UPDATE D5289TABLE1 SET COL1 = 'bbb'");
                assertDERBY5289ResultsAndDelete();
                break;
        }
    }

    /**
     * Private helper method for fixture testDERBY5289TriggerUpgradeFormat
     * to check and cleanup date in each phase.
     * 
     * @throws SQLException
     */
    private void assertDERBY5289ResultsAndDelete() throws SQLException {
        Statement s = createStatement();
        JDBC.assertFullResultSet(s.executeQuery("SELECT * FROM D5289TABLE1"), 
                new String[][] {{"bbb"}});        
        JDBC.assertFullResultSet(s.executeQuery("SELECT * FROM D5289TABLE2"),
                new String[][] {{"bbb"}});
        JDBC.assertFullResultSet(s.executeQuery("SELECT * FROM D5289TABLE3"), 
                new String[][] {{"ccc"}});
        s.executeUpdate("DELETE FROM D5289TABLE1");
        s.executeUpdate("DELETE FROM D5289TABLE2");
        s.executeUpdate("DELETE FROM D5289TABLE3");
        commit();  
    }

    /**
     * Regression test case for DERBY-6314, which caused upgrade to fail if a
     * metadata query had been executed with the old version of the database.
     */
    public void testDERBY6314() throws SQLException {
        // Simply execute a metadata query. The query itself did not use to
        // fail, but it caused PhaseChanger to fail when moving to the
        // PH_SOFT_UPGRADE phase or the PH_HARD_UPGRADE phase.
        JDBC.assertDrainResults(getConnection().getMetaData().getSchemas());
    }

    /**
     * Verify that recompilation of a stale meta-data query works in soft
     * upgrade. Before DERBY-4753, it used to fail with a syntax error
     * because the recompilation didn't accept internal syntax.
     */
    public void testDERBY4753() throws SQLException {
        // Use a separate database for this test case because
        // 1) we set a database property that we don't want the other test
        //    cases to see
        // 2) we want to start with an empty database so that the schema
        //    changes we make are considered significant enough to make the
        //    plans stale (in an already populated database, larger changes
        //    are needed to make the plans stale)
        final DataSource ds = JDBCDataSource.getDataSourceLogical("DERBY-4753");

        if (getPhase() == PH_CREATE) {
            // Create the database with the old version and set the stale
            // plan check interval as low as possible to make the test reach
            // the stale plan check earlier.
            JDBCDataSource.setBeanProperty(ds, "createDatabase", "create");
            Connection c = ds.getConnection();
            Statement s = c.createStatement();
            s.execute("call syscs_util.syscs_set_database_property("
                    + "'derby.language.stalePlanCheckInterval', '5')");
            s.close();
            c.close();
        } else if (getPhase() == PH_SOFT_UPGRADE) {
            Connection c = ds.getConnection();
            DatabaseMetaData dmd = c.getMetaData();

            // First make sure the getIndexInfo query is compiled.
            JDBC.assertEmpty(dmd.getIndexInfo(null, null, "", true, true));

            // Then make some schema changes so that the tables used by the
            // getIndexInfo query grows so much that they will be recompiled
            // on the next stale plan check.
            Statement s = c.createStatement();
            for (int i = 0; i < 10; i++) {
                String sql = "create table s" + i + ".t(col0 int";
                for (int j = 1; j < 1000; j++) {
                    sql += ", col" + j + " int";
                }
                sql += ')';
                s.execute(sql);
            }
            s.close();

            // Finally execute getIndexInfo() as many times as needed to
            // reach the stale plan check interval so that it is recompiled.
            // The fifth call used to fail with a syntax error.
            for (int i = 0; i < 5; i++) {
                JDBC.assertEmpty(dmd.getIndexInfo(null, null, "", true, true));
            }

            c.close();
        }
    }
}
