# 2008 February 15

 #

 # 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.

 #

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

 #

 # Ticket #2942.  

 #

 # Queries of the form:

 #

 #     SELECT group_concat(x) FROM (SELECT * FROM table ORDER BY 1);

 #

 # The ORDER BY would be dropped by the query flattener.  This used

 # to not matter because aggregate functions sum(), min(), max(), avg(),

 # and so forth give the same result regardless of the order of inputs.

 # But with the addition of the group_concat() function, suddenly the

 # order does matter.

 #

 # $Id: tkt2942.test,v 1.1 2008/02/15 14:33:04 drh Exp $

 #

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 ifcapable !subquery {

   finish_test

   return

 }

 do_test tkt2942.1 {

   execsql {

     create table t1(num int);

     insert into t1 values (2);

     insert into t1 values (1);

     insert into t1 values (3);

     insert into t1 values (4);

     SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY num DESC);

   }

 } {4,3,2,1}

 do_test tkt2942.2 {

   execsql {

     SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY num);

   }

 } {1,2,3,4}

 do_test tkt2942.3 {

   execsql {

     SELECT group_concat(num) FROM (SELECT num FROM t1);

   }

 } {2,1,3,4}

 do_test tkt2942.4 {

   execsql {

     SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY rowid DESC);

   }

 } {4,3,1,2}

 finish_test