On Tue, 28 Mar 2023 at 17:54, Maxim Boguk <maxim.boguk@gmail.com> wrote:
> During an attempt to create a minimal test case I discovered an effect for which I have no explanation:
> (all tests with jit=on):
>
> Run EXPLAIN on the single partition, so far expected results...
> explain select * from interview_review_info_archive_p028;
> QUERY PLAN
> -----------------------------------------------------------------------------------------------
> Seq Scan on interview_review_info_archive_p028 (cost=0.00..361819.08 rows=34546848 width=40)
> JIT:
> Functions: 2
> Options: Inlining true, Optimization true, Expressions true, Deforming true
It could be something like a dropped column forcing projection of the
SELECT *. You might want to try without SELECT * using some subset of
columns instead.
Check if columns have been dropped with:
select attnum,attname from pg_Attribute where
attrelid='interview_review_info_archive_p028'::Regclass;
David
Hi David,
You 100% right
negotiation_chat_archive=# explain select topic_id,review_id,move_to_invitation_state_time,no_interview_reply_time,review_suggestion_chat_message_creation_time from interview_review_info_archive_p028;
QUERY PLAN
-----------------------------------------------------------------------------------------------
Seq Scan on interview_review_info_archive_p028 (cost=0.00..361921.00 rows=34563080 width=40)
Exceptionally curious case when select * not equivalent select list_all_columns from table...
Thank you.
--