Re: col_usage$ question

That is a new table in Oracle 9 and is used by Oracle to track what columns are used in predicates. At present the only use of that information that I am aware of is in the procedure dbms_stats.gather_table_stats ( ..., method_opt => 'for columns ... size auto');

At 09:29 AM 11/18/2003, you wrote:

>Does anyone know what this table (sys.col_usage$) is used for? To me it
>sounds like something that CBO might appreciate ... but any ideas? It is
>referenced by dbms_stats and dbms_stats_internal packages ...
>
>Thanks in advance
>Raj
>--------------------------------------------------------------------------------
>
>Rajendra dot Jamadagni at nospamespn dot com

Wolfgang Breitling
Oracle7, 8, 8i, 9i OCP DBA
Centrex Consulting Corporation
http://www.centrexcc.com

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