Thread: Function that creates a custom (temporary) table AND returns a pointer to it = impossible in pg?

Function that creates a custom (temporary) table AND returns a pointer to it = impossible in pg?

From

"Davor J."

Date:

12 February 2010, 10:24:37

What I want is something similar to this:

CREATE OR REPLACE FUNCTION f( /* "some args..." */)
  RETURNS text AS
$BODY$
DECLARE
 ...
BEGIN
 DROP TABLE IF EXISTS tbl_temp;

 CREATE TEMPORARY TABLE tbl_temp(
  -- "based on args..."
  );

 WHILE
  INSERT INTO tbl_temp VALUES (/*"some values"*/);
 END LOOP;

 /*create indexes on it, manipulate, whatever...*/

 RETURN 'tbl_temp'::text;

END;
$BODY$
  LANGUAGE 'plpgsql'

Basically, what I want is a similar function f() that returns me a "pointer"
to the table which I can use in some query like this: SELECT * FROM
regclass(f()); Currently, this query only gives me one row 'tbl_temp'...,
but not what I want: "SELECT * FROM tbl_temp;" Can this be done in Postgres?

Original post:
http://forums.devshed.com/postgresql-help-21/function-that-creates-a-custom-table-and-returns-a-pointer-675539.html

Kind regards,
Davor

Re: Function that creates a custom (temporary) table AND returns a pointer to it = impossible in pg?

From

"A. Kretschmer"

Date:

12 February 2010, 10:48:39

In response to Davor J. :
> What I want is something similar to this:
>
>
> Basically, what I want is a similar function f() that returns me a "pointer"
> to the table which I can use in some query like this: SELECT * FROM
> regclass(f()); Currently, this query only gives me one row 'tbl_temp'...,
> but not what I want: "SELECT * FROM tbl_temp;" Can this be done in Postgres?

Take a look at
http://okbob.blogspot.com/2008/08/using-cursors-for-generating-cross.html


--
Andreas Kretschmer
Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
GnuPG: 0x31720C99, 1006 CCB4 A326 1D42 6431  2EB0 389D 1DC2 3172 0C99

Re: Function that creates a custom (temporary) table AND returns a pointer to it = impossible in pg?

From

"Davor J."

Date:

14 February 2010, 17:51:21

Thank you for the link Andreas. It was helpfull, but still not quite what I
need.

Regards,
Davor

""A. Kretschmer"" <andreas.kretschmer@schollglas.com> wrote in message
news:20100212114635.GB25282@a-kretschmer.de...
> In response to Davor J. :
>> What I want is something similar to this:
>>
>>
>> Basically, what I want is a similar function f() that returns me a
>> "pointer"
>> to the table which I can use in some query like this: SELECT * FROM
>> regclass(f()); Currently, this query only gives me one row 'tbl_temp'...,
>> but not what I want: "SELECT * FROM tbl_temp;" Can this be done in
>> Postgres?
>
> Take a look at
> http://okbob.blogspot.com/2008/08/using-cursors-for-generating-cross.html
>
>
> --
> Andreas Kretschmer
> Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
> GnuPG: 0x31720C99, 1006 CCB4 A326 1D42 6431  2EB0 389D 1DC2 3172 0C99
>
> --
> Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
> To make changes to your subscription:
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>