> Can anybody help me how to declare and use an text array in PL/pgSQL
This plpgsql function answers the question whether a user (from
pg_shadow) is a member of the groups (pg_group), reading the array column
of pg_group. Unfortunately, I could not change any array item nor append
the array. I am afraid it is impossible, remembering Peter Eisentraut's
advice.
You might find something similar in contrib/array/.
Regards,
Zoltan
CREATE FUNCTION is_a_group_member (int4,varchar) RETURNS bool AS'
declare rename $1 to userno; rename $2 to group; groupno integer; listelement int4; i integer; b bool;
yesnobool;
begin select into groupno grosysid from pg_group where group = groname; if not found thenraise exception
''Non-existinggroup'';end if; i = 0; b = ''t''; yesno = ''f''; while b loopi = i + 1;select into listelement
pg_group.grolist[i] from pg_group where groupno = grosysid;if listelement is null then b = ''f''; end if;if b
anduserno = listelement then yesno = ''t''; end if;end loop; return yesno;
end;
