Re: How to count the number of items in an Array?

Hi,

Thanks for the reply.

I have done it in this way:

[code]
FOR vDISTRITOS_NA_TABELA IN
SELECT array[id_distrito] FROM am_newsletter_distritos
WHERE email = pEMAIL and id_website_recolha = pID_WEBSITE_RECOLHA
LOOP
vDISTRITOS_NA_TABELA_CONST := vDISTRITOS_NA_TABELA_CONST ||
vDISTRITOS_NA_TABELA;
END LOOP;
[/code]

Best Regards,

On Sun, Feb 21, 2010 at 3:25 PM, Andreas Kretschmer <
akretschmer(at)spamfence(dot)net> wrote:

> Andre Lopes <lopes80andre(at)gmail(dot)com> wrote:
>
> > One more time, thanks for the reply. I'am using postgre 8.3. I think I
> don't
> > have the array_agg(), there is another way of doing it?
>
> Sure.
>
> The doc contains an example for a user-defined aggregate-function:
> http://www.postgresql.org/docs/8.4/interactive/xaggr.html
>
> It works with versions prior 8.4.
>
>
> test=*# CREATE AGGREGATE array_accum (anyelement)
> test-# (
> test(# sfunc = array_append,
> test(# stype = anyarray,
> test(# initcond = '{}'
> test(# );
> CREATE AGGREGATE
> Zeit: 44,645 ms
> test=*# select array_accum(a) from foo;
> array_accum
> -------------
> {1,3,5,7}
> (1 Zeile)
>
>
>
> Andreas
> --
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