hi,

habe build a package and a function to concat rows to a single column.

at least, if I run the select statement nativly I retrieve zwo rows
but calling it within a select statement
select denorm_pkg.GetNetz (id_plan, id_knoten) netzd from knoten where id_plan= 0 and id_knoten = 122
the column netzd is showing no values

does anybody have a hint what might cause to problem

(select conut(*) from knoten k , netzwerkdienst n , knoten_netzwerkdienste kn where k.id_knoten = kn.id_knoten and
n.id_netzwerkdienst = kn.id_netzwerkdienst
and k.id_plan = kn.ip_plan is showing 2 rows)

table netzwerkdienst (id_netzwerkdienst number pk, name varchar(32))
intersection table knoten_netzwerkdienst (id_plan, id_knoten, id_netzwerkdienst) all number
table knoten (id_plan number , id_knoten number, name varchar(32) ...)

thanks



create or replace PACKAGE denorm_PKG IS

/*
Denormatlisierung der Knoten fuer itmasterplan

*/
FUNCTION GetNetz (ix_knoten IN knoten.id_knoten%TYPE,
ix_plan IN knoten.id_plan%TYPE) RETURN Varchar2 ;

END denorm_PKG;
/


create or replace PACKAGE BODY DENORM_PKG AS

/*

*/
FUNCTION GetNetz (ix_knoten IN knoten.id_knoten%TYPE,
ix_plan IN knoten.id_plan%TYPE) RETURN VARCHAR2

IS

-- Cursor für die Datenbankabfrage
CURSOR netzcrs (ix_knoten knoten.id_knoten%TYPE,
ix_plan knoten.id_plan%TYPE) IS
select n.netzwerkdienst
from netzwerkdienst n, knoten_netzwerkdienste kn

where n.id_netzwerkdienst = kn.id_netzwerkdienst

and kn.id_plan = ix_plan
and kn.id_knoten = ix_knoten;



tmpVar varchar2(255);

netz_rec netzcrs%ROWTYPE;
BEGIN
tmpVar := NULL;



IF NOT netzcrs%ISOPEN
THEN
OPEN netzcrs( ix_knoten, ix_plan);
END IF;

FETCH netzcrs INTO netz_rec;
-- Schleife über alle Resultdatensätze, konkateniert alle
netzwerkdienste
WHILE (netzcrs%FOUND)
LOOP
IF tmpVar IS NULL
THEN
tmpVar := netz_rec.netzwerkdienst;
ELSE
tmpVar := tmpVar ||','|| netz_rec.netzwerkdienst;

END IF;
FETCH netzcrs INTO netz_rec;
END LOOP;

CLOSE netzcrs;

RETURN tmpVar;
END GetNetz;

END DENORM_PKG;
/

sorry folks for the disruption

have got it my fault were the direction of the parameters

first id_knoten next id_plan instead if id_plan, id_knoten

I can't see what your problem is. What do you get for:

select n.netzwerkdienst
from netzwerkdienst n, knoten_netzwerkdienste kn
where n.id_netzwerkdienst = kn.id_netzwerkdienst
and kn.id_plan = 0
and kn.id_knoten = 122;

?

While looking at it I simplified your function code to:

Or to take it further:

only for a better understanding and another appologize

I' ve defined the function getnetz ((ix_knoten IN knoten.id_knoten%TYPE, ix_plan IN knoten.id_plan%TYPE)

but called it getnetz (ip_plan, ip_knoten) ...

sorry but it realy was my fault