to_number question 2004-07-14 - By Tanel Poder
Hm,
Maybe it has something to do how optimizer transforms your query (maybe a
bug or a feature).
Try it with NO_MERGE, NO_UNNEST, NO_EXPAND, CURSOR_SHARING_EXACT hints or
set some relevant parameters (_unnest_subquery=false,
_complex_view_merging=false) and compare the execution plans if the
behaviour changes.
Btw, in 10g there is a NO_QUERY_TRANSFORMATION hint which disables all
optimizer 's query transformations...
Tanel.
-- -- Original Message -- --
From: <Stephen.Lee@(protected) >
To: <oracle-l@(protected) >
Sent: Thursday, July 15, 2004 5:00 AM
Subject: RE: to_number question
>
> OK. It 's something about the WHERE clause being outside the subquery.
> (Mebbe somebody can explain it.)
>
> select nbr_cc_fop_name from nbr_cc
> where nbr_cc_fop_name in ( 'AX ', 'MC ', 'VI ', 'DS ')
> and to_number(trim(nbr_cc_no_high)) - to_number(trim(nbr_cc_no_low)) > 0
>
> WORKS!
>
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