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MDEV-18300: ASAN error in Field_blob::get_key_image upon UPDATE with subquery

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For single table updates and multi-table updates , engine independent statistics were not being
read even if the statistics were collected.
Fixed it, so when the optimizer_use_condition_selectivity > 2 then we would read the available
statistics for update queries.
This commit is contained in:
Varun Gupta
2019-04-11 13:05:01 +05:30
parent 812ac2bb85
commit 409dddf695
4 changed files with 57 additions and 0 deletions
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24
mysql-test/r/update_innodb.result
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@ -65,3 +65,27 @@ SELECT * FROM t1;
a_id b_id c_id
1 NULL NULL
drop table t1,t2;
#
# MDEV-18300: ASAN error in Field_blob::get_key_image upon UPDATE with subquery
#
set @save_optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity;
set @save_use_stat_tables= @@use_stat_tables;
set use_stat_tables=preferably;
set optimizer_use_condition_selectivity=4;
CREATE TABLE t1 (a INT, b CHAR(8)) ENGINE=InnoDB;
insert into t1 values (1,'foo'),(2, 'abc');
CREATE TABLE t2 (c CHAR(8), d BLOB) ENGINE=InnoDB;
insert into t2 values ('abc', 'foo'),('edf', 'food');
ANALYZE TABLE t1,t2;
UPDATE t1 SET a = 1 WHERE b = ( SELECT c FROM t2 WHERE d = 'foo' );
SELECT * FROM t1;
a b
1 foo
1 abc
DROP TABLE t1, t2;
create table t1 (a int not null, b int, c int) engine=InnoDB;
create table t2 (d int, e int) engine=InnoDB;
update t1, t2 set a=NULL, b=2, c=NULL where b=d and e=200;
drop table t1,t2;
set @@optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
set @@use_stat_tables= @save_use_stat_tables;