Comments on: dbms_stats.copy_table_stats does not alter low/high value http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/ Writing About Our Experiences With Oracle Databases Fri, 05 Mar 2010 10:24:30 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Bob Smith http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/comment-page-1/#comment-6720 Bob Smith Thu, 08 Oct 2009 09:35:41 +0000 http://askdba.org/weblog/?p=496#comment-6720 dbms_stats.copy_table_stats copies the histogram values but their range is not adjusted e.g. if we copy the stats from the partition for 12th JULY to 13th JULY then the srec.novals(1) and (2) remain at 12th JULY rather than 13th JULY and it is this that is throwing the optimiser. Can send you the code we use if you want to take a look. dbms_stats.copy_table_stats copies the histogram values but their range is not adjusted e.g. if we copy the stats from the partition for 12th JULY to 13th JULY then the srec.novals(1) and (2) remain at 12th JULY rather than 13th JULY and it is this that is throwing the optimiser.

Can send you the code we use if you want to take a look.

]]> By: amitbansal http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/comment-page-1/#comment-6695 amitbansal Wed, 07 Oct 2009 17:17:38 +0000 http://askdba.org/weblog/?p=496#comment-6695 Bob, Thanks for your comments. Do you want to say that dbms_stats.copy_table_stats does not copy the histogram's ? I have not personally checked the same yet. Regards Amit Bob,

Thanks for your comments. Do you want to say that dbms_stats.copy_table_stats does not copy the histogram's ? I have not personally checked the same yet.

Regards
Amit

]]> By: AskDba.org Weblog » GATHER_STATS_JOB — Is it enabled? http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/comment-page-1/#comment-5099 AskDba.org Weblog » GATHER_STATS_JOB — Is it enabled? Tue, 18 Aug 2009 17:04:18 +0000 http://askdba.org/weblog/?p=496#comment-5099 [...] for more info ( Due to bug copy_table_stats does not alter low/high value. Details can be found here [...] [...] for more info ( Due to bug copy_table_stats does not alter low/high value. Details can be found here [...]

]]> By: fredjam23 http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/comment-page-1/#comment-3669 fredjam23 Wed, 01 Jul 2009 06:40:14 +0000 http://askdba.org/weblog/?p=496#comment-3669 Well its a nice post.It helped me a lot while preparing partitions in the data base..the code given is working..thanks for posting this.. Well its a nice post.It helped me a lot while preparing partitions in the data base..the code given is working..thanks for posting this..

]]> By: Blogroll Report 19/06/2009 – 26/06/2006 « Coskan’s Approach to Oracle http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/comment-page-1/#comment-3580 Blogroll Report 19/06/2009 – 26/06/2006 « Coskan’s Approach to Oracle Fri, 26 Jun 2009 20:08:08 +0000 http://askdba.org/weblog/?p=496#comment-3580 [...] Amit Bansal – dbms_stats.copy_table_stats does not alter low/high value [...] [...] Amit Bansal – dbms_stats.copy_table_stats does not alter low/high value [...]

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