database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-08 11:22:35 +03:00
Code Activity

MDEV-23767: IN-to-subquery conversion is not visible in optimizer trace

Browse Source 
Add the printout
This commit is contained in:
Sergei Petrunia
2020-09-20 00:07:37 +03:00
parent ccbe6bb6fc
commit 29a6d23622
3 changed files with 148 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
mysql-test/main/opt_trace.test
View File

@@ -654,5 +654,31 @@ from information_schema.optimizer_trace;
drop table t0, t1, t2, t3;
--echo #
--echo # MDEV-23767: IN-to-subquery conversion is not visible in optimizer trace
--echo #
create table t0 (a int);
INSERT INTO t0 VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
set @tmp=@@in_predicate_conversion_threshold;
set in_predicate_conversion_threshold=3;
explain select * from t0 where a in (1,2,3,4,5,6);
select json_detailed(json_extract(trace, '$**.in_to_subquery_conversion'))
from information_schema.optimizer_trace;
explain select * from t0 where a in (1,2,3,4,5,a+1);
select json_detailed(json_extract(trace, '$**.in_to_subquery_conversion'))
from information_schema.optimizer_trace;
explain select * from t0 where a in ('1','2','3','4','5','6');
select json_detailed(json_extract(trace, '$**.in_to_subquery_conversion'))
from information_schema.optimizer_trace;
set in_predicate_conversion_threshold=@tmp;
drop table t0;
--echo # End of 10.5 tests
set optimizer_trace='enabled=off';