sqlite/test/tkt3773.test
drh e8902a70fe Disable the query flattening optimization when the subquery is a compound
query with an ORDER BY clause.  Ticket #3773 shows why that combination
does not work. (CVS 6437)

FossilOrigin-Name: 23f90d50737a36ebd17152dd4667948ce7049967
2009-04-02 16:59:47 +00:00

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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
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