Обсуждение: "Custom" records?
Before asking this, I suspect that the answer is no, but I'll ask anyway. Is there a way to return a completely custom column/row record from a plpgsql function? I'd want a function "Descriptives(int)" with results to looking like the below when SELECT:ed : measurement | value ------------+------ Mean | 15.8 Median | 16.0 Std.dev | 0.8 Max | 38.0 Min | 0.0 If not possible in plpgsql, is there a workaround while still not having an external program fetching a lot of data from the DB to do the calculation? // Joel
Joel Palmius <joel.palmius@mh.se> writes: > Is there a way to return a completely custom column/row record from a > plpgsql function? If I understand you correctly, you should be able to do this in 7.3. http://developer.postgresql.org/docs/postgres/plpgsql-control-structures.html (see RETURN NEXT) Set-returning functions can also be defined using C or SQL. Cheers, Neil -- Neil Conway <neilc@samurai.com> || PGP Key ID: DB3C29FC
Joel,
I don't have an answer for this, but I do have a question.
I couldn't find any way to get a median native in PostgreSQL, did you write
a median function or some such? If so, would you be willing to share it?
Thanks,
Peter Darley
-----Original Message-----
From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org]On Behalf Of Joel Palmius
Sent: Thursday, September 19, 2002 2:53 AM
To: pgsql-general
Subject: [GENERAL] "Custom" records?
Before asking this, I suspect that the answer is no, but I'll ask anyway.
Is there a way to return a completely custom column/row record from a
plpgsql function?
I'd want a function "Descriptives(int)" with results to looking like the
below when SELECT:ed :
measurement | value
------------+------
Mean | 15.8
Median | 16.0
Std.dev | 0.8
Max | 38.0
Min | 0.0
If not possible in plpgsql, is there a workaround while still not having
an external program fetching a lot of data from the DB to do the
calculation?
// Joel
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On Tue, 24 Sep 2002 09:50:36 -0700 "Peter Darley" <pdarley@kinesis-cem.com> wrote: > Joel, > I don't have an answer for this, but I do have a question. > I couldn't find any way to get a median native in PostgreSQL, did you write > a median function or some such? If so, would you be willing to share it? > Thanks, > Peter Darley Here is one of ways to get median values. http://www.brasileiro.net/postgres/cookbook/view-one-recipe.adp?recipe_id=5486 Regards, Masaru Sugawara