From: | Andreas Gaab <A(dot)Gaab(at)scanlab(dot)de> |
---|---|
To: | "pgsql-sql(at)postgresql(dot)org" <pgsql-sql(at)postgresql(dot)org> |
Subject: | aggregation of setof |
Date: | 2011-01-28 11:42:18 |
Message-ID: | 48DA836F3865C54B8FBF424A3B775AF60132434B4A@Exchange-Server |
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Thread: | |
Lists: | pgsql-sql |
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
___________________________________________________________________________
SCANLAB AG
Dr. Andreas Simon Gaab
Entwicklung * R & D
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___________________________________________________________________________
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