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Thread: pl/pgsql problem with return types

pl/pgsql problem with return types

From
Juris Zeltins
Date:
Hello!

i have problem with pl/pgsql function;

====================================================
===
ERROR:  wrong record type supplied in RETURN NEXT
CONTEXT:  PL/pgSQL function "tests" line 6 at return next
===

-- Function: tests(int8)
-- DROP FUNCTION tests(int8);

CREATE OR REPLACE FUNCTION tests(int8) RETURNS SETOF pages AS
$BODY$DECLARE   P    RECORD;
BEGIN   FOR P IN select pageid from pages   LOOP       RETURN NEXT P;   END LOOP;   RETURN;
END;$BODY$ LANGUAGE 'plpgsql' STABLE;
ALTER FUNCTION tests(int8) OWNER TO diglat_web;

====================================================
-- Table: pages
-- DROP TABLE pages;

CREATE TABLE pages
( pageid int8 NOT NULL, ppageid int8 NOT NULL DEFAULT 0, name varchar(100), status int4 DEFAULT 0, CONSTRAINT
pages_pkeyPRIMARY KEY (pageid), CONSTRAINT pages_in_pages_fkey FOREIGN KEY (ppageid) REFERENCES pages 
 
(pageid) ON UPDATE RESTRICT ON DELETE RESTRICT, CONSTRAINT pages_uniq UNIQUE (pageid, ppageid)
)
WITH OIDS;
====================================================

Actualy function is correct... and the same code run successfully on 
other table.. there is the problem ?

Thanks

Re: pl/pgsql problem with return types

From
John DeSoi
Date:
On Mar 11, 2005, at 5:54 AM, Juris Zeltins wrote:

>    FOR P IN select pageid from pages
>

This way you are only getting the pageid column. I think what you want 
is

FOR P in select * from pages

so that P contains the complete pages record.


John DeSoi, Ph.D.
http://pgedit.com/
Power Tools for PostgreSQL

Re: pl/pgsql problem with return types

From
Juris Zeltins
Date:
Yep.. i have solved this problem by specifying
the correct return type and variable type (should be the same)

but as said, in some cases pl_exec executes with type conversion.
as real example - i have :

return type = SETOF new type  "category_node(catid, pcatid)"
variable = R, SR -> RECORD

and

FOR R IN select * from ...
LOOP  RETURN NEXT R;  /* add  RECORD to SETOF_of_CATEGORY_NODE */
....

and works...
the problem seems is teh same - on altered tables there is some porblem 
with this :)

Actualy - return type & variable in "RETURN NEXT" must be the same type.

// Solved

John DeSoi wrote:

>
> On Mar 11, 2005, at 5:54 AM, Juris Zeltins wrote:
>
>>    FOR P IN select pageid from pages
>>
>
> This way you are only getting the pageid column. I think what you want is
>
> FOR P in select * from pages
>
> so that P contains the complete pages record.
>
>
> John DeSoi, Ph.D.
> http://pgedit.com/
> Power Tools for PostgreSQL
>
>