Re: col_usage$ question

[Wolfgang Breitling]

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
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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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