Re: Prompt User From a pgplsql Function

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Terry Lee Tucker <terry(at)esc1(dot)com>
Cc: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: Prompt User From a pgplsql Function
Date: 2005-01-29 16:09:20
Message-ID: 3868.1107014960@sss.pgh.pa.us
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Terry Lee Tucker <terry(at)esc1(dot)com> writes:
> Is there any way to gather input from a user while in the
> middle of a transaction from a plpgsql function?

Hmm ... RAISE NOTICE to send out the prompt, and then COPY from some
pre-agreed file to collect the result? (COPY FROM STDIN would be nicer
but it doesn't work inside plpgsql, and probably can't be made to work
without breaking the FE/BE protocol.) Seems messy and insecure,
not to mention it requires the client code to be on the same machine
as the database. I think you'd be better off spending the time to
restructure your functions, instead.

If you were using one of the untrusted languages (plperlu etc) it might
be possible to create a temporary side communication channel to talk to
the client code, but that seems pretty messy as well.

regards, tom lane

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