From: | Greg Stark <gsstark(at)mit(dot)edu> |
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To: | PFC <lists(at)peufeu(dot)com> |
Cc: | "Greg Stark" <gsstark(at)mit(dot)edu>, "Tino Wildenhain" <tino(at)wildenhain(dot)de>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Mark Woodward" <pgsql(at)mohawksoft(dot)com>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: COPY (query) TO file |
Date: | 2006-06-03 14:22:19 |
Message-ID: | 87r726co9w.fsf@stark.xeocode.com |
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Lists: | pgsql-hackers |
PFC <lists(at)peufeu(dot)com> writes:
> > I was also vaguely pondering whether all the DDL commands could be
> > generalized to receive or send COPY formatted data for repeated execution.
> > It would be neat to be able to prepare an UPDATE with placeholders and
> > stream data in COPY format as parameters to the UPDATE to execute it
> > thousands or millions of times without any protocol overhead or network
> > pipeline stalls.
>
> MySQL already does this for INSERT :
> INSERT INTO x (a,b) VALUES (1,2), (3,4), (5,6)...;
Does MySQL really let you stream that? Trying to do syntax like that in
Postgres wouldn't work because the parser would try to build up a parse tree
for the whole statement before running the command.
--
greg
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