From: | yamt(at)mwd(dot)biglobe(dot)ne(dot)jp (YAMAMOTO Takashi) |
---|---|
To: | pgsql-novice(at)postgresql(dot)org |
Subject: | Re: async fast-path calls? |
Date: | 2011-01-15 13:17:53 |
Message-ID: | 20110115131753.2E84A19CE4B@mail.netbsd.org |
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Lists: | pgsql-novice |
hi,
i workarounded this by using PQsendQuery with eg. "select lowrite($1,$2)".
while it seems to work, i wonder if it's ok to use these functions this way,
given that only some of large object server-side functions are documented
in http://www.postgresql.org/docs/9.0/interactive/lo-funcs.html.
YAMAMOTO Takashi
> hi,
>
> is there any easy way to issue large object operations like lo_write,
> or more generally fast-path calls, asynchronously? (async in the sense
> of PQsendQuery so that i can poll to wait a result)
>
> background: i want to use multiple connections to the server in a single
> application for performance reasons. the application is single-threaded.
> (multi threading is not possible because i need to use a
> pthread-incompatible library.)
> using synchronous api when another asynchronous command is in-progress is
> deadlock-prone as i can't receive the result of asynchronous one until
> the synchronous one finishes.
>
> YAMAMOTO Takashi
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