sl@0: # 2008 February 15
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: #
sl@0: # Ticket #2942.  
sl@0: #
sl@0: # Queries of the form:
sl@0: #
sl@0: #     SELECT group_concat(x) FROM (SELECT * FROM table ORDER BY 1);
sl@0: #
sl@0: # The ORDER BY would be dropped by the query flattener.  This used
sl@0: # to not matter because aggregate functions sum(), min(), max(), avg(),
sl@0: # and so forth give the same result regardless of the order of inputs.
sl@0: # But with the addition of the group_concat() function, suddenly the
sl@0: # order does matter.
sl@0: #
sl@0: # $Id: tkt2942.test,v 1.1 2008/02/15 14:33:04 drh Exp $
sl@0: #
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: ifcapable !subquery {
sl@0:   finish_test
sl@0:   return
sl@0: }
sl@0: 
sl@0: do_test tkt2942.1 {
sl@0:   execsql {
sl@0:     create table t1(num int);
sl@0:     insert into t1 values (2);
sl@0:     insert into t1 values (1);
sl@0:     insert into t1 values (3);
sl@0:     insert into t1 values (4);
sl@0:     SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY num DESC);
sl@0:   }
sl@0: } {4,3,2,1}
sl@0: do_test tkt2942.2 {
sl@0:   execsql {
sl@0:     SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY num);
sl@0:   }
sl@0: } {1,2,3,4}
sl@0: do_test tkt2942.3 {
sl@0:   execsql {
sl@0:     SELECT group_concat(num) FROM (SELECT num FROM t1);
sl@0:   }
sl@0: } {2,1,3,4}
sl@0: do_test tkt2942.4 {
sl@0:   execsql {
sl@0:     SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY rowid DESC);
sl@0:   }
sl@0: } {4,3,1,2}
sl@0: 
sl@0: 
sl@0: finish_test