Обсуждение: Stored Procedure Problem

> CREATE FUNCTION b_function() RETURNS int4 AS '
> DECLARE
>    an_integer int4;
> BEGIN
>    select emp_id from employee;
>    return an_integer;
> END;
> '
> LANGUAGE 'plpgsql';
>
Try
SELECT INTO an_integer emp_id from employee;

Regards, Christoph

Hi,   use this
CREATE FUNCTION b_function() RETURNS int4 AS 'DECLARE   an_integer int4;BEGIN   select into an_integer emp_id from
employee;  return an_integer;END;'LANGUAGE 'plpgsql';
 

--- Atul <atul@imcindia.net> escribió: > Hello,
> 
>                 Atul Here, I have one problem while
> accessing Database
> Records Or Recordset from stored procedure.
> Procedure is like this,
> 
> CREATE FUNCTION b_function() RETURNS int4 AS '
> DECLARE
>    an_integer int4;
> BEGIN
>    select emp_id from employee;
>    return an_integer;
> END;
> '
> LANGUAGE 'plpgsql';
> 
> I create the procedure . After that I run the
> statement like
> 
> Test=#> select b_function();
> 
> Error comes like
> 
> Error: ERROR:  SELECT query has no destination for
> result data.
>                 If you want to discard the results,
> use PERFORM instead.
> WARNING:  Error occurred while executing PL/pgSQL
> function b_function
> WARNING:  line 4 at SQL statement
> 
> Also I use PERFORM statement. But still problem is
> not resolved.
> 
> Please Help me. I hope your kind co-operation.
> 
> Thanks.
> 
> Atul…
>  

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Atul wrote:

> CREATE FUNCTION b_function() RETURNS varchar AS '
>
>  DECLARE
>
>     an_integer int4;
>
>     an_name    varchar;
>
>  BEGIN
>
>     select into an_integer emp_id,an_name emp_name from employee;
>
>     return an_integer,an_name;
>
>  END;
>
>  '

First: select into an_integer,an_name emp_id,emp_name...
Second: you can't return 2 variables from plpgsql function.

Tomasz Myrta

On Thu, Dec 12, 2002 at 08:13:22PM +0530, Atul wrote:
> Hi,
>       How to return multiple columns through stored procedure.

<snip>
> But This Gives Error(For Multiple column , not for single column)
> Please Let me know.

You didn't say which version of PostgreSQL you are using.

In PG 7.2 you can return a cursor.
In 7.3 you can return a cursor or a true record set.

See http://developer.postgresql.org/docs/postgres/plpgsql-cursors.html
(true to 7.2 and 7.3)

Also
http://developer.postgresql.org/docs/postgres/plpgsql-control-structures.html
("Returning from a function"). The part on returning record sets is only
relevant to 7.3

-Roberto

-- 
+----|        Roberto Mello   -    http://www.brasileiro.net/  |------+
+       Computer Science Graduate Student, Utah State University      +
+       USU Free Software & GNU/Linux Club - http://fslc.usu.edu/     +
:.:..::..:::.:::::..:..:.:..:..::::.:...:: => BRAILE TAGLINE!

In 7.3 you can ,

in follwoing steps,

1. do a CREATE TYPE (i would recommend to use a sperate schema for storing user defined types)
2. in plpgsql declare the RECORD of that type .

3. populate the record varible according to your business logic and return the RECORD using  RETURN statements.


hope it will help ,
if not please revert back.


regds
mallah.

On Thursday 12 December 2002 08:21 pm, Tomasz Myrta wrote:
> Atul wrote:
> > CREATE FUNCTION b_function() RETURNS varchar AS '
> >
> >  DECLARE
> >
> >     an_integer int4;
> >
> >     an_name    varchar;
> >
> >  BEGIN
> >
> >     select into an_integer emp_id,an_name emp_name from employee;
> >
> >     return an_integer,an_name;
> >
> >  END;
> >
> >  '
>
> First: select into an_integer,an_name emp_id,emp_name...
> Second: you can't return 2 variables from plpgsql function.
>
> Tomasz Myrta
>
>
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