Re: Function returning SETOF using plpythonu

[Marcin Stępnicki <mstepnicki(at)gmail(dot)com>]

Dnia Fri, 26 Jan 2007 17:24:52 +0000, Luís Sousa napisał(a):

> Hi,
> 
> Is it possible to return rows from a function written in plpythonu using 
> SETOF?
> 
> Example:
> CREATE FUNCTION "test_python_setof"()
> RETURNS SETOF text AS '
>     records=plpy.execute("SELECT name FROM interface");
>     return records
> ' LANGUAGE 'plpythonu';
> 
> With this code is returning the object from the execution:
> <PLyResult object at 0xb703e458>

plpy.execute returns dictionary, and you need a list. You may try this:

CREATE FUNCTION "test_python_setof"()
RETURNS SETOF text AS '
    records=plpy.execute("SELECT name FROM interface");
    return  [ (r["name"]) for r in records]
' LANGUAGE 'plpythonu';

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