| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
| Cc: | Nikolai Zhubr <n-a-zhubr(at)yandex(dot)ru>, "pgsql-general(at)postgresql(dot)org >> PG-General Mailing List" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Server-side hooks for user session start and session end |
| Date: | 2015-09-26 18:29:36 |
| Message-ID: | 3997.1443292176@sss.pgh.pa.us |
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| Lists: | pgsql-general |
Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> 2015-09-26 19:59 GMT+02:00 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
>> A session-start hook is already possible at the C-code level, using
>> session_preload_libraries. It wouldn't be hard to write an extension
>> that exposed that in some useful way to SQL code.
> years ago I tried it, if I remember well. I had a problems with SPI calls,
> because some caches was not initialized. I am not sure, and I didn't test
> last time.
You'd have to start your own transaction if you wanted one, and any
uncaught error would effectively be FATAL because it would terminate the
session, but otherwise I don't see why that wouldn't work.
regards, tom lane
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