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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