| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Gilles Darold <gilles(dot)darold(at)dalibo(dot)com> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: [HACKERS] proposal: schema variables |
| Date: | 2018-08-12 05:35:33 |
| Message-ID: | CAFj8pRA_jZYuTRHEMsv8CnZLBqmnS5xRjcZh-uf0nBWA7WrzMA@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers pgsql-performance |
Hi
2018-08-11 20:46 GMT+02:00 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>:
>
>
> 2018-08-11 7:39 GMT+02:00 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>:
>
>> Hi
>>
>> I am sending updated patch. It should to solve almost all Giles's and
>> Peter's objections.
>>
>> I am not happy so executor access values of variables directly. It is
>> most simple implementation - and I hope so it is good enough, but now the
>> access to variables is too volatile. But it is works good enough for
>> usability testing.
>>
>> I am thinking about some cache of used variables in ExprContext, so the
>> variable in one ExprContext will look like stable - more like PLpgSQL
>> variables.
>>
>
> I wrote EState based schema variable values cache, so now the variables in
> queries are stable (like PARAM_EXTERN) and can be used for optimization.
>
new update - after cleaning
Regards
Pavel
> Regards
>
> Pavel
>
>
>>
>> Regards
>>
>> Pavel
>>
>
>
| Attachment | Content-Type | Size |
|---|---|---|
| schema-variables-180812-01.patch | text/x-patch | 194.9 KB |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Pavel Stehule | 2018-08-12 05:42:50 | Re: [HACKERS] Optional message to user when terminating/cancelling backend |
| Previous Message | Edmund Horner | 2018-08-12 02:29:05 | Tid scan improvements |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Mariel Cherkassky | 2018-08-13 20:34:46 | increase insert into local table from remote oracle table preformance |
| Previous Message | Pavel Stehule | 2018-08-11 18:46:34 | Re: [HACKERS] proposal: schema variables |