select ..... not in .....

I folks.

I'm struggling with a select which should be easy.
select v_d_code, v_o_number,  v_vin, v_status from vista_details where 
v_d_code='64340' and v_o_number='C0023';v_d_code | v_o_number |    v_vin    |  v_status
----------+------------+-------------+-------------64340    | C0023      | GCDW7D37645 | COMPOUND IN
(1 row)

shows that the record exists in vista.

select w_vin from walon where substring(w_vin from '(.{11}$)') 
= 'GCDW7D37645';w_vin
-------
(0 rows)

shows that it doesn't exist in walon.

So, who does this select not return the row?

select v_d_code, v_o_number,  v_vin, v_status from vista_details where v_vin 
not in (
goole(#   select substring(w_vin from '(.{11}$)') from walon);v_d_code | v_o_number | v_vin | v_status
----------+------------+-------+----------
(0 rows)

-- 
Gary Stainburn
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