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# 2014-03-03
#
# 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.
#
#***********************************************************************
#
# This file verifies that an OP_Copy operation is used instead of OP_SCopy
# in a compound select in a case where the source register might be changed
# before the copy is used.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix selectF
do_execsql_test 1 {
BEGIN TRANSACTION;
CREATE TABLE t1(a, b, c);
INSERT INTO "t1" VALUES(1,'one','I');
CREATE TABLE t2(d, e, f);
INSERT INTO "t2" VALUES(5,'ten','XX');
INSERT INTO "t2" VALUES(6,NULL,NULL);
CREATE INDEX i1 ON t1(b, a);
COMMIT;
}
#explain_i {
# SELECT * FROM t2
# UNION ALL
# SELECT * FROM t1 WHERE a<5
# ORDER BY 2, 1
#}
do_execsql_test 2 {
SELECT * FROM t2
UNION ALL
SELECT * FROM t1 WHERE a<5
ORDER BY 2, 1
} {6 {} {} 1 one I 5 ten XX}
finish_test
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