Re: PoC plpgsql - possibility to force custom or generic plan

From: David Steele <david(at)pgmasters(dot)net>
To: PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Cc: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>
Subject: Re: PoC plpgsql - possibility to force custom or generic plan
Date: 2017-03-16 16:15:42
Message-ID: e3731aa0-678c-79e9-430f-0d68c90fb077@pgmasters.net
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On 2/1/17 3:59 PM, Pavel Stehule wrote:
> Hi
>
> 2017-01-24 21:33 GMT+01:00 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com
> <mailto:pavel(dot)stehule(at)gmail(dot)com>>:
>
> Perhaps that's as simple as renaming all the existing _ns_*
> functions to _block_ and then adding support for pragmas...
>
> Since you're adding cursor_options to PLpgSQL_expr it should
> probably be removed as an option to exec_*.
>
> I have to recheck it. Some cursor options going from dynamic
> cursor variables and are related to dynamic query - not query
> that creates query string.
>
> hmm .. so current state is better due using options like
> CURSOR_OPT_PARALLEL_OK
>
> if (expr->plan == NULL)
> exec_prepare_plan(estate, expr, (parallelOK ?
> CURSOR_OPT_PARALLEL_OK : 0) |
> expr->cursor_options);
>
> This options is not permanent feature of expression - and then I
> cannot to remove cursor_option argument from exec_*
>
> I did minor cleaning - remove cursor_options from plpgsql_var
>
> + basic doc

This patch still applies cleanly and compiles at cccbdde.

Any reviewers want to have a look?

--
-David
david(at)pgmasters(dot)net

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