Horton

Re: [Proposal] Global temporary tables

Prabhat Sahu <prabhat.sahu@enterprisedb.com>

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From: Prabhat Sahu <prabhat.sahu@enterprisedb.com>
To: 曾文旌 <wenjing.zwj@alibaba-inc.com>
Cc: tushar <tushar.ahuja@enterprisedb.com>, Pavel Stehule <pavel.stehule@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Tomas Vondra <tomas.vondra@2ndquadrant.com>, Konstantin Knizhnik <k.knizhnik@postgrespro.ru>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>, 蔡松露(子嘉) <zijia@taobao.com>, "Cai, Le" <le.cai@alibaba-inc.com>, 萧少聪(铁庵) <shaocong.xsc@alibaba-inc.com>
Date: 2020-04-17T11:26:55Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. PageAddItemExtended(): Add LP_UNUSED assertion.

  2. Remove temporary files after backend crash

  3. Fix comment in indexing.c

  4. Fix failure to ignore leftover temp tables after a server crash.

On Fri, Apr 17, 2020 at 2:44 PM 曾文旌 <wenjing.zwj@alibaba-inc.com> wrote:

>
> I improved the logic of the warning message so that when the gap between
> relfrozenxid of GTT is small,
> it will no longer be alarmed message.
>

Hi Wenjing,
Thanks for the patch(v26), I have verified the previous related issues, and
are working fine now.
Please check the below scenario VACUUM from a non-super user.

-- Create user "test_gtt", connect it , create gtt, VACUUM gtt and VACUUM /
VACUUM FULL
postgres=# CREATE USER test_gtt;
CREATE ROLE
postgres=# \c postgres test_gtt
You are now connected to database "postgres" as user "test_gtt".
postgres=> CREATE GLOBAL TEMPORARY TABLE gtt1(c1 int);
CREATE TABLE

-- VACUUM gtt is working fine, whereas we are getting huge WARNING for
VACUUM / VACUUM FULL as below:
postgres=> VACUUM gtt1 ;
VACUUM
postgres=> VACUUM;
WARNING:  skipping "pg_statistic" --- only superuser or database owner can
vacuum it
WARNING:  skipping "pg_type" --- only superuser or database owner can
vacuum it
WARNING:  skipping "pg_toast_2600" --- only table or database owner can
vacuum it
WARNING:  skipping "pg_toast_2600_index" --- only table or database owner
can vacuum it

... ...
... ...

WARNING:  skipping "_pg_foreign_tables" --- only table or database owner
can vacuum it
WARNING:  skipping "foreign_table_options" --- only table or database owner
can vacuum it
WARNING:  skipping "user_mapping_options" --- only table or database owner
can vacuum it
WARNING:  skipping "user_mappings" --- only table or database owner can
vacuum it
VACUUM

-- 

With Regards,
Prabhat Kumar Sahu
EnterpriseDB: http://www.enterprisedb.com