Hidden Columns

From: Bill Buchan <wbuchan_at_uk.intasys.com>
Date: Wed, 28 May 2003 06:44:45 -0800
Message-ID: <F001.005A42D4.20030528064445@fatcity.com>

Hi all,

I know this is RTFM but I can't find the right part in the FM to R. So any help would be appreciated:

In the context of:

  DBMS_STATS.GATHER_DATABASE_STATS(method_opt=>'FOR ALL HIDDEN COLUMNS');

what is a "hidden column". I tried gathering stats FOR ALL HIDDEN COLUMNS and it didn't seem to gather any stats for any columns. What is it meant to do?

Thanks
- Bill.

PS. The complete syntax for the column is: FOR ALL [INDEXED | HIDDEN] COLUMNS [size_clause]

--

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--

Author: Bill Buchan
  INET: wbuchan_at_uk.intasys.com

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