diff --git a/mysql-test/main/distinct.result b/mysql-test/main/distinct.result index 2062ff0091d..0e31a174be7 100644 --- a/mysql-test/main/distinct.result +++ b/mysql-test/main/distinct.result @@ -1070,3 +1070,39 @@ UNION 1 drop table t1; End of 5.5 tests +# +# MDEV-27382: OFFSET is ignored when it is combined with the DISTINCT, IN() and JOIN +# +CREATE TABLE t1 ( +id int(7) NOT NULL AUTO_INCREMENT, +name varchar(50) DEFAULT NULL, +primary key (id) +); +INSERT INTO t1 VALUES (1, 'Reed'), (10, 'no-child'); +CREATE TABLE t2 ( +id int(11) NOT NULL AUTO_INCREMENT, +parent_id int(7) NOT NULL, +name varchar(100) DEFAULT NULL, +primary key (id), +key(parent_id) +); +INSERT INTO t2 VALUES (1, 1,'John'), (2, 2,'no-parent'); +SELECT DISTINCT p.id +FROM t1 p LEFT JOIN t2 c ON p.id = c.parent_id +WHERE p.id=1 +LIMIT 0; +id +SELECT DISTINCT p.id +FROM t1 p LEFT JOIN t2 c ON p.id = c.parent_id +WHERE p.id=1 +LIMIT 0 offset 5; +id +# Test the second part of the fix: just check that "LIMIT 0 OFFSET n" is +# handled in the same way as "LIMIT 0" +explain select * from t1 limit 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Zero limit +explain select * from t1 limit 0 offset 10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Zero limit +drop table t1, t2; diff --git a/mysql-test/main/distinct.test b/mysql-test/main/distinct.test index da12c7273b2..32e189da98a 100644 --- a/mysql-test/main/distinct.test +++ b/mysql-test/main/distinct.test @@ -818,3 +818,41 @@ UNION drop table t1; --echo End of 5.5 tests + +--echo # +--echo # MDEV-27382: OFFSET is ignored when it is combined with the DISTINCT, IN() and JOIN +--echo # +CREATE TABLE t1 ( + id int(7) NOT NULL AUTO_INCREMENT, + name varchar(50) DEFAULT NULL, + primary key (id) +); +INSERT INTO t1 VALUES (1, 'Reed'), (10, 'no-child'); + +CREATE TABLE t2 ( + id int(11) NOT NULL AUTO_INCREMENT, + parent_id int(7) NOT NULL, + name varchar(100) DEFAULT NULL, + primary key (id), + key(parent_id) +); + +INSERT INTO t2 VALUES (1, 1,'John'), (2, 2,'no-parent'); + +SELECT DISTINCT p.id +FROM t1 p LEFT JOIN t2 c ON p.id = c.parent_id +WHERE p.id=1 +LIMIT 0; + +SELECT DISTINCT p.id +FROM t1 p LEFT JOIN t2 c ON p.id = c.parent_id +WHERE p.id=1 +LIMIT 0 offset 5; + +--echo # Test the second part of the fix: just check that "LIMIT 0 OFFSET n" is +--echo # handled in the same way as "LIMIT 0" + +explain select * from t1 limit 0; +explain select * from t1 limit 0 offset 10; + +drop table t1, t2; diff --git a/mysql-test/suite/galera/disabled.def b/mysql-test/suite/galera/disabled.def index 493ea2c87c0..c00bc326bca 100644 --- a/mysql-test/suite/galera/disabled.def +++ b/mysql-test/suite/galera/disabled.def @@ -15,6 +15,7 @@ GCF-939 : MDEV-21520 galera.GCF-939 MDEV-20225 : MDEV-20886 galera.MDEV-20225 MW-328A : MDEV-22666 galera.MW-328A MTR failed: "Semaphore wait has lasted > 600 seconds" and do not release port 16002 MW-328B : MDEV-22666 galera.MW-328A MTR failed: "Semaphore wait has lasted > 600 seconds" and do not release port 16002 +MW-328D : MDEV-27550 ER_LOCK_DEADLOCK is gone after MDEV-27025 MW-329 : MDEV-19962 Galera test failure on MW-329 galera_applier_ftwrl_table_alter : MDEV-26502 : galera.galera_applier_ftwrl_table_alter MTR failed : Result content mismatch galera_as_slave_replication_bundle : MDEV-15785 OPTION_GTID_BEGIN is set in Gtid_log_event::do_apply_event() diff --git a/sql/sql_limit.h b/sql/sql_limit.h index b51ebf72493..41308bc12db 100644 --- a/sql/sql_limit.h +++ b/sql/sql_limit.h @@ -37,6 +37,8 @@ class Select_limit_counters void set_limit(ha_rows limit, ha_rows offset, bool with_ties_arg) { + if (limit == 0) + offset= 0; offset_limit_cnt= offset; select_limit_cnt= limit; with_ties= with_ties_arg;