mirror of
https://github.com/MariaDB/server.git
synced 2025-01-31 11:01:52 +01:00
87d4d7232c
The result file changes are mainly that number of rows is one smaller for some queries with DISTINCT or GROUP BY
20 lines
685 B
Text
20 lines
685 B
Text
#
|
|
# MDEV-26249: Crash in in Explain_node::print_explain_for_children while writing to the slow query log
|
|
#
|
|
set @sql_tmp=@@slow_query_log;
|
|
SET GLOBAL slow_query_log = 1;
|
|
SET long_query_time = 0.000000;
|
|
SET log_slow_verbosity = 'explain';
|
|
CREATE TABLE t1 ( id varchar(50), KEY (id)) engine=innodb;
|
|
SELECT * FROM (SELECT id FROM t1 GROUP BY id) dt WHERE 1=0;
|
|
id
|
|
select 1;
|
|
1
|
|
1
|
|
explain
|
|
SELECT * FROM (SELECT id FROM t1 GROUP BY id) dt WHERE 1=0;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
|
2 DERIVED t1 range NULL id 53 NULL 1 Using index for group-by
|
|
SET GLOBAL slow_query_log = @sql_tmp;
|
|
drop table t1;
|