Horton

Re: [Proposal] Global temporary tables

Pavel Stehule <pavel.stehule@gmail.com>

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From: Pavel Stehule <pavel.stehule@gmail.com>
To: Prabhat Sahu <prabhat.sahu@enterprisedb.com>
Cc: 曾文旌(义从) <wenjing.zwj@alibaba-inc.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: 2020-02-24T13:41:41Z
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.

po 24. 2. 2020 v 14:34 odesílatel Prabhat Sahu <
prabhat.sahu@enterprisedb.com> napsal:

> Hi All,
>
> I observe a different behavior in  "temporary table" and "global temporary
> table".
> Not sure if it is expected?
>
> postgres=# create global temporary table parent1(a int)  on commit delete
> rows;
> CREATE TABLE
> postgres=# create global temporary table child1() inherits (parent1);
> CREATE TABLE
> postgres=# insert into parent1 values(1);
> INSERT 0 1
> postgres=# insert into child1 values(2);
> INSERT 0 1
> postgres=# select * from parent1;
>  a
> ---
> (0 rows)
>
> postgres=# select * from child1;
>  a
> ---
> (0 rows)
>

It is bug. Probably INHERITS clause is not well implemented for GTT



>
> postgres=# create temporary table parent2(a int)  on commit delete rows;
> CREATE TABLE
> postgres=# create temporary table child2() inherits (parent2);
> CREATE TABLE
> postgres=# insert into parent2 values(1);
> INSERT 0 1
> postgres=# insert into child2 values(2);
> INSERT 0 1
> postgres=# select * from parent2;
>  a
> ---
>  2
> (1 row)
>
> postgres=# select * from child2;
>  a
> ---
>  2
> (1 row)
>
>
> Thanks,
> Prabhat Sahu
>
>