File: bug33767814.result

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mysql-8.0 8.0.43-3
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CREATE TABLE t_asc (
pk int, a int, b int, 
primary key (pk), key (a), key (b)
) ENGINE=InnoDB;
CREATE TABLE t_desc (
pk int, a int, b int,
primary key (pk DESC), key (a), key (b)
) ENGINE=InnoDB;
INSERT INTO t_asc VALUES (27,3,0), (28,39,NULL), (29,NULL,255), (30,NULL,0);
INSERT INTO t_desc SELECT * FROM t_asc;
SELECT /*+ INDEX_MERGE(t_asc b, a) */ * FROM t_asc
WHERE b = 255 AND a IS NULL;
pk	a	b
29	NULL	255
SELECT /*+ INDEX_MERGE(t_desc b, a) */ * FROM t_desc
WHERE b = 255 AND a IS NULL;
pk	a	b
29	NULL	255
DROP TABLE t_asc;
DROP TABLE t_desc;