Wrong result (OFFSET is ignored) with DISTINCT

CREATE TABLE t1 (a int) ENGINE=MyISAM;

INSERT INTO t1 VALUES (1);

CREATE TABLE t2 (b int) ENGINE=MyISAM;

INSERT INTO t2 VALUES (1),(2),(3);

SELECT DISTINCT t1.a FROM t1 JOIN t2 ORDER BY a LIMIT 10 OFFSET 10;

# Cleanup

DROP TABLE t1, t2;

SELECT DISTINCT t1.a FROM t1 JOIN t2 ORDER BY a LIMIT 10 OFFSET 10;

a

1

commit eb0804ef5e7eeb059bb193c3c6787e8a4188d34d

Author: Oleksandr Byelkin

Date:   Thu Sep 26 09:49:50 2019 +0200

    MDEV-18553: MDEV-16327 pre-requisits part 1: isolation of LIMIT/OFFSET handling