Re: Getting the results columns before execution

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От Bruce Momjian
Тема Re: Getting the results columns before execution
Дата
Msg-id 200401301050.i0UAoW012330@candle.pha.pa.us
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Ответ на Re: Getting the results columns before execution  (Jan Wieck <JanWieck@Yahoo.com>)
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Jan Wieck wrote:
> Tom Lane wrote:
> > Bruce Momjian <pgman@candle.pha.pa.us> writes:
> >> Tom Lane wrote:
> >>>> Are those exposed through the libpq interface?
> >>> 
> >>> No, because libpq doesn't really have any concept of prepared statements.
> >>> It would probably make sense to add some more API to libpq to allow
> >>> creation and interrogation of prepared statements, but no one's got
> >>> around to that yet.
> > 
> >> Uh, if libpq doesn't know about it, how is that information accessed?
> > 
> > That's exactly the problem...
> 
> Currently the only way to do that would be to have a user defined 
> function that calls SPI_prepare() with the query string and returns the 
> desired information to the client.
> 

Oh, I understand now.  Added to TODO:
* Allow libpq to return information about prepared queries

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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