Comments on: Function based index and suspicious filter predicates http://dioncho.wordpress.com/2009/07/30/function-based-index-and-suspicious-filter-predicates/ We are natural born scientists Fri, 17 Dec 2010 18:43:21 +0000 hourly 1 http://wordpress.com/ By: Blogroll Report 24/07/2009 – 31/07/2009 « Coskan’s Approach to Oracle http://dioncho.wordpress.com/2009/07/30/function-based-index-and-suspicious-filter-predicates/#comment-372 Sat, 01 Aug 2009 01:54:14 +0000 http://dioncho.wordpress.com/?p=887#comment-372 [...] Dion Cho-Function based index and suspicious filter predicates [...]

]]> By: Dion Cho http://dioncho.wordpress.com/2009/07/30/function-based-index-and-suspicious-filter-predicates/#comment-370 Thu, 30 Jul 2009 12:51:28 +0000 http://dioncho.wordpress.com/?p=887#comment-370 Kumar.

It totally depends, but yes, it has the risk you mentioned. This issue is pretty well explained in the following post by Richard Foote – the index king. :)

http://richardfoote.wordpress.com/2008/12/04/function-based-indexes-and-missing-statistics-no-surprises/

]]> By: Kumar http://dioncho.wordpress.com/2009/07/30/function-based-index-and-suspicious-filter-predicates/#comment-369 Thu, 30 Jul 2009 12:31:38 +0000 http://dioncho.wordpress.com/?p=887#comment-369 Hi Dion
Very good explanation again.
Since the stats are not generated for the hidden ccolumn, would it cause more issues in terms of performance as time passes and this cardinatlity problem will be more pronounced?

]]>