From: | Joe Conway <mail(at)joeconway(dot)com> |
---|---|
To: | Enzo Cappa <zcappa(at)gmail(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Query inside a C-Function |
Date: | 2010-03-19 19:41:05 |
Message-ID: | 4BA3D351.8@joeconway.com |
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Lists: | pgsql-general |
On 03/19/2010 12:26 PM, Enzo Cappa wrote:
> Hello!
>
> I have to make a c function for determining if some point its inside a
> set of elliptical geometries (I'm talking about a shared library, used
> like a function in the queries ). The geometries are defined in a table,
> so the function should iterate over a set of them. One option could be
> pass as a param to the funcition an array of HeapTupleHeader (if its
> posible), and other could be make a query inside the function for
> obtaining the geometries.
>
> I can't find the way of doing none of them, someone knows if it's
> posible? And, of course, information and links are needed too.
See the SPI functions:
http://www.postgresql.org/docs/8.4/interactive/spi.html
There are examples of use in the contrib/tablefunc code among others.
HTH,
Joe
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