Re: field or table alias is not allowed as an input of table functions

Hi nphana,

Instead of using single function, you can create another function and Invoke the function and can use IN parameter.
Here is the example:

CREATE FUNCTION RAJ.MY_FUNC (I_VKORG NVARCHAR (4), I_VTWEG NVARCHAR (2), 

             I_SPART NVARCHAR (2),  I_PARVW NVARCHAR (2), I_PARZA NVARCHAR (3) )
RETURNS TABLE (KUNNR NVARCHAR (10))
LANGUAGE SQLSCRIPT AS
BEGIN

  RETURN
  SELECT "ECC2HANA"."KNVP".KUNNR FROM  "ECC2HANA"."KNVP"
   WHERE "ECC2HANA"."KNVP".VKORG = :I_VKORG
     AND "ECC2HANA"."KNVP".VTWEG = :I_VTWEG
     AND "ECC2HANA"."KNVP".SPART = :I_SPART
     AND "ECC2HANA"."KNVP".PARVW = :I_PARVW
     AND "ECC2HANA"."KNVP".PARZA = :I_PARZA
;
END
;

SELECT * FROM RAJ.MY_FUNC('7500','10','00','AG','000');

Result is shown below:

Now I created another function so that I can use the result set of above function which is used as criteria for some other table.

I not used any input parameter for second function but can be used if required.

CREATE FUNCTION RAJ.FUNC_MY_FUNC ( )

RETURNS TABLE (NAME1 NVARCHAR (35))

LANGUAGE SQLSCRIPT AS

BEGIN

RETURN 

SELECT "ECC2HANA"."KNA1".NAME1 FROM "ECC2HANA"."KNA1"

  WHERE "ECC2HANA"."KNA1".KUNNR IN (SELECT * FROM RAJ.MY_FUNC('7500','10','00','AG','000'));

END;

Result is shown below:

Similarly you can do for your requirement.

Regards
Raj