Re: more isolation tests for update tuple routing

Amit Langote <langote_amit_f8@lab.ntt.co.jp>

From: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2019-04-10T00:34:43Z
Lists: pgsql-hackers
On 2019/04/10 0:45, Tom Lane wrote:
> Amit Langote <Langote_Amit_f8@lab.ntt.co.jp> writes:
>> Per what Andres mentioned in his reply on the original thread [1], in
>> scenarios 1 and 2 where the 1st session's update causes a row to move,
>> session 2 produces the following error when trying to update the same row:
>> ERROR:  tuple to be locked was already moved to another partition due to
>> concurrent update
> 
>> Do we want those tests like that (with the error that is) in the
>> eval-plan-qual isolation suite?
> 
> Sure, but I think one such test is enough.
> 
>> I came up with the attached.
> 
> I changed the last case so it actually did what I had in mind
> (initial state of the update would be a partition move, but after
> fetching up-to-date tuple it isn't) and pushed it.  Thanks for
> doing the legwork!

Thank you.

Regards,
Amit




Commits

  1. Test some more cases with partitioned tables in EvalPlanQual.