Grant select privileg on a single column to a new user

Hu Mailinglist,

i´ve got a little problem with the grant-statement. I work with sapdb 7.4.3.25 under WinNT. I´ve create a table like:
CREATE TABLE "ROOT"."1_4_Calls_KNL"
(
	"Tag"               Timestamp,
	"KC_ID"               Integer,
	"Hotline_ID"               Integer,
	"Belegung"               Float (16),
	"Calls"               Float (16),
	"Calls_E20"               Float (16),
	"Fore"               Float (16),
	FOREIGN KEY "Hotline"	("Hotline_ID") REFERENCES "ROOT"."0_6_Hotline" ("ID") ON DELETE  RESTRICT
)

After that i create a new databaseuser with:
create user "HANS" password "KLAUS" DBA

and a new role:
create role "ROLLE"

Now i tried to grant the select-privileg on the "Calls_E20" column to the role:
grant select on "1_4_Calls_KNL"."Calls_E20" to "ROLLE"

but i get the error unknown user name. This is clear, because the user "1_4_Calls_KNL" doesn´t exist. But if this statement isn´t correct, what do i have to do if i want to grant the privileg? In the sapdb library stands:"Allows the identified user to select rows in the specified table. If column names are specified, the rows may only be selected in the columns identified by these names. The current user must be authorized to grant the SELECT privilege.", so it´s possible, but how?? I´m connected to the database as sysdba.

Greeting and thanks in advance,
Andreas
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