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help / color / mirror / Atom feedFrom: Pavel Stehule <pavel.stehule@gmail.com>
To: Serge Rielau <serge@rielau.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Subject: Re: proposal: schema variables
Date: Wed, 1 Nov 2017 06:56:03 +0100
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2017-11-01 6:07 GMT+01:00 Serge Rielau <serge@rielau.com>:
> "Although the syntax of CREATE TEMPORARY TABLE resembles that of the SQL
> standard, the effect is not the same. In the standard, temporary tables are
> defined just once and automatically exist (starting with empty contents) in
> every session that needs them. PostgreSQL instead requires each session
> to issue its own CREATE TEMPORARY TABLE command for each temporary table
> to be used. This allows different sessions to use the same temporary table
> name for different purposes, whereas the standard's approach constrains all
> instances of a given temporary table name to have the same table structure.”
> Yeah, that’s a DECLAREd table in my book. No wonder we didn’t link up.
>
This is known discussion about local / global temp tables in PostgresSQL.
And ToDo point: implementation of global temp tables in Postgres.
This temporary behave is marginal part of proposal - so I can to remove it
from proposal - and later open discussion about CREATE TEMPORARY VARIABLE
versus DECLARE VARIABLE
Regards
Pavel
Serge
>
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To: pgsql-performance@postgresql.org
Cc: pavel.stehule@gmail.com, serge@rielau.com, pgsql-hackers@postgresql.org
Subject: Re: proposal: schema variables
In-Reply-To: <CAFj8pRCH1OCuSpjOkt3UhW9h3QwG0pikp+kge7Nx+JJ=Z_bPrg@mail.gmail.com>
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