File: bug43249.test

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# Test for BUG#43249 "Innodb returns zero time for the time column
# with <=> NULL order by limit"

--source include/have_debug.inc
--source include/have_innodb.inc

SET @saved_dbug = @@SESSION.debug_dbug;
set session debug_dbug="+d,optimizer_innodb_icp";

CREATE TABLE t1(c1 TIME NOT NULL, c2 TIME NULL, c3 DATE, PRIMARY
KEY(c1), UNIQUE INDEX(c2)) engine=innodb;
INSERT INTO t1 VALUES('8:29:45',NULL,'2009-02-01');
# first time, good results:
SELECT * FROM t1 WHERE c2 <=> NULL ORDER BY c2 LIMIT 2;
# second time, bad results:
SELECT * FROM t1 WHERE c2 <=> NULL ORDER BY c2 LIMIT 2;

drop table `t1`;
SET debug_dbug= @saved_dbug;