database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

MDEV-20157 perfschema.stage_mdl_function failed in buildbot with wrong result

Browse Source 
MDL wait consists of short 1 second waits (this is not configurable)
repeated until lock_wait_timeout is reached. The stage is changed
to Waiting and back every second. To have predictable result in the
test the query should filter all sequences of X, "Waiting for MDL", X,
leaving just X.
This commit is contained in:
Sergei Golubchik
2024-04-24 18:08:46 +02:00
parent 259394aed7
commit 7d5e08de6b
1 changed files with 17 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
mysql-test/suite/perfschema/include/stage_setup.inc
View File

@ -121,12 +121,23 @@ begin
where thread_id = my_thread_id
and nesting_event_id = my_statement_id
order by event_id asc;
# Ignore query cache as it may not be enabled
select username, event_name, nesting_event_type
from performance_schema.events_stages_history
where thread_id = my_thread_id
and nesting_event_id = my_statement_id and
event_name not like "%query cache%"
# 1. Ignore query cache as it may not be enabled
# 2. MDL wait consists of short 1 second waits (this is not configurable)
# repeated until lock_wait_timeout is reached. The stage is changed
# to Waiting and back every second. To have predictable result here
# the query filters all sequences of X, "Waiting for MDL", X,
# leaving just X.
with h as (
select event_id, username, event_name, nesting_event_type,
lag(event_name) over (order by event_id) = lead(event_name) over (order by event_id)
and event_name = "stage/sql/Waiting for stored function metadata lock" as v1,
lag(event_name, 2) over (order by event_id) = event_name
and lag(event_name, 1) over (order by event_id) = "stage/sql/Waiting for stored function metadata lock" as v2
from performance_schema.events_stages_history
where thread_id = my_thread_id
and nesting_event_id = my_statement_id and
event_name not like "%query cache%"
) select username, event_name, nesting_event_type from h where v1 is not true and v2 is not true
order by event_id asc;
end;
else