# 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