# 2004 December 07

 #

 # 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 implements regression tests for SQLite library.

 #

 # This file implements tests to make sure expression of an INSERT

 # and UPDATE statement are only evaluated once.  See ticket #980.

 # If an expression uses a function that has side-effects or which

 # is not deterministic (ex: random()) then we want to make sure

 # that the same evaluation occurs for the actual INSERT/UPDATE and

 # for the NEW.* fields of any triggers that fire.

 #

 # $Id: trigger6.test,v 1.2 2005/05/05 11:04:50 drh Exp $

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 ifcapable {!trigger} {

   finish_test

   return

 }

 do_test trigger6-1.1 {

   execsql {

     CREATE TABLE t1(x, y);

     CREATE TABLE log(a, b, c);

     CREATE TRIGGER r1 BEFORE INSERT ON t1 BEGIN

       INSERT INTO log VALUES(1, new.x, new.y);

     END;

     CREATE TRIGGER r2 BEFORE UPDATE ON t1 BEGIN

       INSERT INTO log VALUES(2, new.x, new.y);

     END;

   }

   set ::trigger6_cnt 0

   proc trigger6_counter {args} {

     incr ::trigger6_cnt

     return $::trigger6_cnt

   }

   db function counter trigger6_counter

   execsql {

     INSERT INTO t1 VALUES(1,counter());

     SELECT * FROM t1;

   }

 } {1 1}

 do_test trigger6-1.2 {

   execsql {

     SELECT * FROM log;

   }

 } {1 1 1}

 do_test trigger6-1.3 {

   execsql {

     DELETE FROM t1;

     DELETE FROM log;

     INSERT INTO t1 VALUES(2,counter(2,3)+4);

     SELECT * FROM t1;

   }

 } {2 6}

 do_test trigger6-1.4 {

   execsql {

     SELECT * FROM log;

   }

 } {1 2 6}

 do_test trigger6-1.5 {

   execsql {

     DELETE FROM log;

     UPDATE t1 SET y=counter(5);

     SELECT * FROM t1;

   }

 } {2 3}

 do_test trigger6-1.6 {

   execsql {

     SELECT * FROM log;

   }

 } {2 2 3}

 finish_test