Обсуждение: Problem with functions

I been trying to create several different functions
that mimic several stored procedures in MSSQL.
The SQL works fine in an interactive SQL, but fails
miserably when I try to run/execute a function created
using that same SQL.
I have been searching web sites and reading what I
find but I have not anything on functions that speaks
about the issue I'm having.
I'm hoping maybe you can provide some input on how to
get these functions to work.  I am including one of my
functions as sample.
Here's the function:
CREATE OR REPLACE FUNCTION "public"."getappts" (text,date, date)
RETURNS SETOF "public"."calendar" AS'
SELECT *
FROM     calendar
WHEREevent_date BETWEEN $2 AND $3    AND agent_number IN    ( SELECT agent_number FROM agents    WHERE rel30a = $1 OR
agent_number = $1 )
 
ORDER BY event_start_time;
'LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT
SECURITY INVOKER;
Yes, I need to return multiple rows in the result set.
The two tables have the 'agent_number' column in
common, ie it is really a foreign key.  But it is not
set up that way, it's not my database and I can not
change it.


    
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On Mon, 20 Sep 2004, Michael Snodgrass wrote:

> I been trying to create several different functions
> that mimic several stored procedures in MSSQL.
> The SQL works fine in an interactive SQL, but fails
> miserably when I try to run/execute a function created
> using that same SQL.
> I have been searching web sites and reading what I
> find but I have not anything on functions that speaks
> about the issue I'm having.
>
> I'm hoping maybe you can provide some input on how to
> get these functions to work.  I am including one of my
> functions as sample.
>
> Here's the function:
> CREATE OR REPLACE FUNCTION "public"."getappts" (text,
>  date, date)
> RETURNS SETOF "public"."calendar" AS'
> SELECT *
> FROM     calendar
> WHERE
>     event_date BETWEEN $2 AND $3
>      AND agent_number IN
>      ( SELECT agent_number FROM agents
>      WHERE rel30a = $1 OR
>      agent_number = $1 )
> ORDER BY event_start_time;
> 'LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT
> SECURITY INVOKER;

That's not the syntax for plpgsql set returning functions. I think
however, you'd likely be able to make it work by using LANGUAGE 'sql'.

If you want more information, there's the set returning function guide on
techdocs:
http://techdocs.postgresql.org/guides/SetReturningFunctions

and a General Bits article at
http://www.varlena.com/varlena/GeneralBits/26.html