File: tkt3773.test

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# 2009 April 2
#
# 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 #3773:  Be careful not to over-optimize when a compound
# subquery contains an ORDER BY clause.
#
#
# $Id: tkt3773.test,v 1.1 2009/04/02 16:59:47 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !compound {
  finish_test
  return
}

do_test tkt3773-1.1 {
  db eval {
    CREATE TABLE t1(a,b);
    INSERT INTO t1 VALUES(2,1);
    INSERT INTO t1 VALUES(33,3);
    CREATE TABLE t2(x,y);
    INSERT INTO t2 VALUES(123,2);
    INSERT INTO t2 VALUES(4,4);
    SELECT a FROM (
      SELECT a, b FROM t1
      UNION ALL
      SELECT x, y FROM t2
      ORDER BY 2
    );
  }
} {2 123 33 4}

finish_test