Re: Creating Histograms

Note in-line.

Regards

Jonathan Lewis

http://www.jlcomp.demon.co.uk/faq/ind_faq.html
The Co-operative Oracle Users' FAQ

http://www.jlcomp.demon.co.uk/seminar.html
Optimising Oracle Seminar - schedule updated July 20th




----- Original Message ----- 
From: "Wolfgang Breitling" <breitliw@xxxxxxxxxxxxx>

>> Otherwise I practice "plan stability" meaning "if the statistics 
>> don't change, the plans won't".

Beg to differ - for example:

The fixed predicate:
    last_update_date >=  "calculated constant of 28 days ago"
is likely to have a selectivity that changes as time passes,
with a possible change in plan, precisely BECAUSE
the statistics haven't changed.



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