howto create dynamic table name in plpgsql function.

hello,

i have a table with documents that have an id and belong to a pool:
(the sample tables have no indices, i know)


       Table "public.asset"
   Column  |  Type   | Modifiers
----------+---------+-----------
asset_id | integer |
pool_id  | integer |
content  | text    |

each pool belongs to a customer:
         Table "public.pool"
    Column    |  Type   | Modifiers
-------------+---------+-----------
pool_id     | integer |
customer_id | integer |

now, for speed reasons i want to create one tsearch2 index per customer.

          Table "public.ftx_1"
      Column     |   Type   | Modifiers
----------------+----------+-----------
asset_id       | integer  |
content_vector | tsvector |

i have one ftx_<customer_id> tabe per customer

so i wrote a trigger:

drop function update_ftx() cascade;

CREATE FUNCTION update_ftx()
RETURNS TRIGGER
AS '
DECLARE
     cid integer;
BEGIN
     SELECT INTO cid customer_id FROM pool WHERE pool_id = NEW.pool_id;
     IF NOT FOUND THEN
       RAISE EXCEPTION ''Invalid pool.'';
     END IF;

     insert into ftx values (NEW.asset_id, to_tsvector(NEW.content));

-- this it where my knowledge ends;-)
-- i want to say something like
-- insert into ftx_||cid values (NEW.asset_id, to_tsvector
(NEW.content));
-- to insert into ftx_<customer_id>

     RETURN new;
END;'
LANGUAGE 'plpgsql';

CREATE TRIGGER update_ftx  BEFORE UPDATE OR INSERT ON asset FOR EACH
ROW EXECUTE PROCEDURE update_ftx();

but i can't get the insert to work as i don't know the syntax..

any help would be greatly appreciated!
..tc