Horton

Re: [Proposal] Global temporary tables

tushar <tushar.ahuja@enterprisedb.com>

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From: tushar <tushar.ahuja@enterprisedb.com>
To: 曾文旌 <wenjing.zwj@alibaba-inc.com>, Pavel Stehule <pavel.stehule@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Prabhat Sahu <prabhat.sahu@enterprisedb.com>
Cc: 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: 2020-04-09T11:46:53Z
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 4/7/20 2:27 PM, 曾文旌 wrote:
> Vacuum full GTT, cluster GTT is already 
> supported in global_temporary_table_v24-pg13.patch.

Hi Wenjing,

Please refer this scenario , where reindex   message is not coming next 
time ( after reconnecting to database) for GTT

A)
--normal table
postgres=# create table nt(n int primary key);
CREATE TABLE
--GTT table
postgres=# create global temp table gtt(n int primary key);
CREATE TABLE
B)
--Reindex  , normal table
postgres=# REINDEX (VERBOSE) TABLE  nt;
INFO:  index "nt_pkey" was reindexed
DETAIL:  CPU: user: 0.00 s, system: 0.00 s, elapsed: 0.00 s
REINDEX
--reindex GTT table
postgres=# REINDEX (VERBOSE) TABLE  gtt;
INFO:  index "gtt_pkey" was reindexed
DETAIL:  CPU: user: 0.00 s, system: 0.00 s, elapsed: 0.00 s
REINDEX
C)
--Reconnect  to database
postgres=# \c
You are now connected to database "postgres" as user "tushar".
D) again perform step B)

postgres=# REINDEX (VERBOSE) TABLE  nt;
INFO:  index "nt_pkey" was reindexed
DETAIL:  CPU: user: 0.00 s, system: 0.00 s, elapsed: 0.00 s
REINDEX
postgres=# REINDEX (VERBOSE) TABLE  gtt;   <-- message  not coming
REINDEX

-- 
regards,tushar
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