| From: | Markus Wanner <markus(at)bluegap(dot)ch> |
|---|---|
| To: | Gregory Stark <stark(at)enterprisedb(dot)com> |
| Cc: | Dmitry Koterov <dmitry(at)koterov(dot)ru>, Postgres <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Patch: propose to include 3 new functions into intarray and intagg |
| Date: | 2008-09-05 12:40:26 |
| Message-ID: | 48C128BA.5050503@bluegap.ch |
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| Thread: | |
| Lists: | pgsql-hackers |
Hi,
Gregory Stark wrote:
> I definitely like the int_array_append_aggregate function but I don't see
> anything int[] specific about it. We should be able to have a generic
> array_union() aggregate which uses the same IsA(fcinfo->context, AggState)
> trick to scribble on its state variable. It don't even see any reason it
> couldn't work for arrays of varlenas, though it would take a bit of
> restructuring.
I've just noticed that this already is a todo item:
"Add array_accum() and array_to_set() functions for arrays
The standards specify array_agg() and UNNEST."
See also:
http://archives.postgresql.org/pgsql-hackers/2007-08/msg00464.php
Regards
Markus Wanner
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