| From: | Michael Fuhr <mike(at)fuhr(dot)org> |
|---|---|
| To: | gustavo halperin <ggh(dot)develop(at)gmail(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Create function problem |
| Date: | 2006-08-04 14:50:45 |
| Message-ID: | 20060804145045.GA76467@winnie.fuhr.org |
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| Lists: | pgsql-general |
[Please copy the mailing list on replies so others can contribute
to and learn from the discussion.]
On Fri, Aug 04, 2006 at 11:20:55AM +0300, gustavo halperin wrote:
> Michael Fuhr wrote:
> >You've hardcoded the strings 'v_tbl_schm' and 'v_tbl_name' instead
> >of using the function's arguments. I don't think SQL functions
> >support named arguments so you'll need to use $1 and $2. You'll
> >also need to use "RETURNS SETOF record" if you want to return more
> >than one row.
> >
> *OK thank you, I did it. But I receive actually one row, same as you
> say, and I need a set of rows for two columns. I don't know how to use
> 'RETURNS SETOF' for two columns, This is possible ??, see the function
> below:*
> /CREATE OR REPLACE FUNCTION f_describe_tables (text, text
> OUT text, OUT text) as -- How to use RETURNS SETOF with *two text columns*??
> $$ SELECT c.column_name, c.data_type
> FROM information_schema.columns c
> WHERE c.table_schema = $1 AND c.table_name = $2
> $$ LANGUAGE SQL;/
Since the function has OUT parameters you can use "RETURNS SETOF record"
like this:
CREATE FUNCTION funcname(<params>) RETURNS SETOF record AS $$
<body>
$$ LANGUAGE SQL;
--
Michael Fuhr
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