# 2007 Oct 3

 #

 # The author disclaims copyright to this source code. In place of

 # a legal notice, here is a blessing:

 #

 #    May you do good and not evil.

 #    May you find forgiveness for yourself and forgive others.

 #    May you share freely, never taking more than you give.

 #

 #***********************************************************************

 #

 # This file is to test that ticket #2767 has been fixed.

 # Ticket #2767 is for a VDBE stack overflow on BEFORE

 # triggers that run RAISE(IGNORE).

 #

 # $Id: tkt2767.test,v 1.2 2008/07/12 14:52:21 drh Exp $

 #

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 do_test tkt2767-1.1 {

   execsql {

     -- Construct a table with many rows of data

     CREATE TABLE t1(x);

     INSERT INTO t1 VALUES(1);

     INSERT INTO t1 VALUES(2);

     INSERT INTO t1 SELECT x+2 FROM t1;

     INSERT INTO t1 SELECT x+4 FROM t1;

     INSERT INTO t1 SELECT x+8 FROM t1;

     INSERT INTO t1 SELECT x+16 FROM t1;

     -- BEFORE triggers that invoke raise(ignore).  The effect of

     -- these triggers should be to make INSERTs, UPDATEs, and DELETEs

     -- into no-ops.

     CREATE TRIGGER r1 BEFORE UPDATE ON t1 BEGIN

       SELECT raise(ignore);

     END;

     CREATE TRIGGER r2 BEFORE DELETE ON t1 BEGIN

       SELECT raise(ignore);

     END;

     CREATE TRIGGER r3 BEFORE INSERT ON t1 BEGIN

       SELECT raise(ignore);

     END;

     -- Verify the table content

     SELECT count(*), sum(x) FROM t1;

   }

 } {32 528}

 # Try to delete all elements of the table.  This will invoke the

 # DELETE trigger 32 times, which should overflow the VDBE stack if

 # the problem of #2767 is not fixed.  If the problem is fixed, all

 # the deletes should be no-ops so the table should remain unchanged.

 #

 do_test tkt2767-1.2 {

   execsql {

     DELETE FROM t1 WHERE x>0;

     SELECT count(*), sum(x) FROM t1;

   }

 } {32 528}

 # Try to update all elements of the table.  This will invoke the

 # UPDATE trigger 32 times, which should overflow the VDBE stack if

 # the problem of #2767 is not fixed.  If the problem is fixed, all

 # the updates should be no-ops so the table should remain unchanged.

 #

 do_test tkt2767-1.3 {

   execsql {

     UPDATE t1 SET x=x+1;

     SELECT count(*), sum(x) FROM t1;

   }

 } {32 528}

 # Invoke the insert trigger.  The insert trigger was working

 # even prior to the fix of #2767.  But it seems good to go ahead

 # and verify that it works.

 #

 do_test tkt2767-1.4 {

   execsql {

     INSERT INTO t1 SELECT x+32 FROM t1;

     SELECT count(*), sum(x) FROM t1;

   }

 } {32 528}

 finish_test