From: | Gerardo Herzig <gherzig(at)fmed(dot)uba(dot)ar> |
---|---|
To: | Anoop G <anoopmadavoor(at)gmail(dot)com>, "pgsql-sql(at)postgresql(dot)org" <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: how to returns set of records in PL/python |
Date: | 2008-04-07 13:03:38 |
Message-ID: | 47FA1BAA.9090401@fmed.uba.ar |
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Thread: | |
Lists: | pgsql-sql |
Anoop G wrote:
>Hi ,
>
> Iam new to plpython,how can I return a recordset from a plpython
>function?
>
> Is there is any way give me an example;
>
>
>plpgsql function
>--------------------------------
>
>CREATE OR REPLACE FUNCTION function_to_get_all_countries() RETURNS SETOF
>RECORD AS $BODY$
>DECLARE
>
> r RECORD;
>
>BEGIN
>
> FOR r IN SELECT pk_bint_country_id,vchr_country FROM tbl_country LOOP
> RETURN NEXT r;
> END LOOP;
> RETURN;
>
>END
>$BODY$ LANGUAGE 'plpgsql';
>
>
>
>
>How i can get the same result using plpythonu and how I can call the
>function (is there any user defined type required like in plpgsql)?
>
>Thanks in advance
>
>Anoop
>
>
>
Yes, plpython can return setofs. You may need to define a new type for that.
After that you can return a list, tuple, dictionary, set, generator
object, or any
You may also check the plpython version, as i recall, its kind of *new*
issue.
This works on 8.2.5, python 2.5,
For a simple case, something like that would work
regression=# \d countries
Table "public.countries"
Column | Type | Modifiers
--------------+-------------------+-----------
country_id | integer |
country_name | character varying |
CREATE OR REPLACE FUNCTION get_countries()
returns setof countries
security definer
as
$$
return plpy.execute("select * from countries")
$$ language plpythonu;
Hope that helps.
Gerardo
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