Horton

Re: [Proposal] Global temporary tables

曾文旌 (义从) <wenjing.zwj@alibaba-inc.com>

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From: 曾文旌(义从) <wenjing.zwj@alibaba-inc.com>
To: Prabhat Sahu <prabhat.sahu@enterprisedb.com>
Cc: "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: 2020-02-25T08:55:46Z
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.


> 2020年2月24日 下午5:44，Prabhat Sahu <prabhat.sahu@enterprisedb.com> 写道：
> 
> On Fri, Feb 21, 2020 at 9:10 PM 曾文旌(义从) <wenjing.zwj@alibaba-inc.com <mailto:wenjing.zwj@alibaba-inc.com>> wrote:
> Hi,
> I have started testing the "Global temporary table" feature,
> That's great, I see hope.
> from "gtt_v11-pg13.patch". Below is my findings:
> 
> -- session 1:
> postgres=# create global temporary table gtt1(a int);
> CREATE TABLE
> 
> -- seeeion 2:
> postgres=# truncate gtt1 ;
> ERROR:  could not open file "base/13585/t3_16384": No such file or directory
> 
> is it expected?
> 
> Oh ,this is a bug, I fixed it.
> Thanks for the patch.
> I have verified the same, Now the issue is resolved with v12 patch.
> 
> Kindly confirm the below scenario:
> 
> postgres=# create global temporary table gtt1 (c1 int unique);
> CREATE TABLE
> 
> postgres=# create global temporary table gtt2 (c1 int references gtt1(c1) );
> ERROR:  referenced relation "gtt1" is not a global temp table
> 
> postgres=# create table tab2 (c1 int references gtt1(c1) );
> ERROR:  referenced relation "gtt1" is not a global temp table
> 
> Thanks, 
> Prabhat Sahu

GTT supports foreign key constraints in global_temporary_table_v13-pg13.patch


Wenjing