From: Andreas Gaab <A.Gaab@scanlab.de>
To: pgsql-sql@postgresql.org <pgsql-sql@postgresql.org>
Subject: Re: aggregation of setof
Date: Mon, 31 Jan 2011 09:52:23 +0100
Message-ID: <48DA836F3865C54B8FBF424A3B775AF6671A6838F8@Exchange-Server> (raw)
In-Reply-To: <AANLkTiktEu9-CyN5ghEqPmPoKVaNYqfXtwBtK=QDK997@mail.gmail.com>
References: <48DA836F3865C54B8FBF424A3B775AF60132434B4A@Exchange-Server>
<AANLkTiktEu9-CyN5ghEqPmPoKVaNYqfXtwBtK=QDK997@mail.gmail.com>
Functions apparently cannot take setof arguments.
Postgres 8.4:
CREATE OR REPLACE FUNCTION testtable(IN setof anyarray)
RETURNS anyarray AS
$BODY$
SELECT $1 LIMIT 1;
$BODY$
LANGUAGE 'sql' STABLE;
-->
ERROR: functions cannot accept set arguments
Von: Viktor Bojović [mailto:viktor.bojovic@gmail.com]
Gesendet: Samstag, 29. Januar 2011 09:28
An: Andreas Gaab
Betreff: Re: [SQL] aggregation of setof
i have never used that type but maybe you can try this;
-create function which returns text[], and takse setof text as argument (if possible)
-reach every text[] in set of text[] using array index
-return values using "return next" for each text in text[] which is in set of text[]
On Fri, Jan 28, 2011 at 12:42 PM, Andreas Gaab <A.Gaab@scanlab.de<mailto:A.Gaab@scanlab.de>> wrote:
Hi all,
I would like to write a query, which aggregates the results of regexp_matches(). The problem is that regexp_matches returnes setof text[] as documented even if I discard the global flag (http://www.postgresql.org/docs/8.4/static/functions-matching.html#FUNCTIONS-POSIX-REGEXP ). Thus resulting in an error when I try to aggregate the result:
“
SELECT array_accum(
regexp_matches('foobarbequebazilbarfbonk', '(b[^b]+)(b[^b]+)')
)
-------------------------------
ERROR: set-valued function called in context that cannot accept a set
********** Fehler **********
ERROR: set-valued function called in context that cannot accept a set
SQL Status:0A000
“
Can I convert a ‚setof text[]‘ to a ‚text[]‘?
Alternatively I could use a sub-select, but I am curious if there are other solutions around.
Regards,
Andreas
___________________________________________________________________________
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___________________________________________________________________________
--
---------------------------------------
Viktor Bojović
---------------------------------------
Wherever I go, Murphy goes with me
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To: pgsql-sql@postgresql.org
Cc: A.Gaab@scanlab.de
Subject: Re: aggregation of setof
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