mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 04:22:27 +01:00
58fa29e0ff
MDEV-4643 MariaDB crashes consistently when trying a SELECT on VIEW with a UNION and an additional JOIN in SELECT open derived temp tables *before* trying QUICK_SELECT for them, handler::multi_range_read_info() needs an open table.
19 lines
1,018 B
Text
19 lines
1,018 B
Text
create table t1 (f1 char(4) primary key) engine=innodb charset=utf8 ;
|
|
insert into t1 values ('aaaa');
|
|
create table t2 (f2 text, f3 char(4) not null) engine=innodb charset=utf8 ;
|
|
create table t3 (id int not null) engine=innodb charset=utf8 ;
|
|
create table t4 (val int not null) engine=innodb charset=utf8;
|
|
explain select 1 from
|
|
(select f2, f3, val, count(id) from t4 join t2 left join t3 on 0) top
|
|
join t1 on f1 = f3 where f3 = 'aaaa' order by val;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 const PRIMARY PRIMARY 12 const 1 Using index; Using filesort
|
|
1 PRIMARY <derived2> ref key0 key0 13 const 0 Using where
|
|
2 DERIVED t4 ALL NULL NULL NULL NULL 1
|
|
2 DERIVED t2 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
|
|
2 DERIVED t3 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join)
|
|
select 1 from
|
|
(select f2, f3, val, count(id) from t4 join t2 left join t3 on 0) top
|
|
join t1 on f1 = f3 where f3 = 'aaaa' order by val;
|
|
1
|
|
drop table t1, t2, t3, t4;
|