dbTalk Databases Forums  

optimizer statistics 11.0.1 2250

sybase.public.sqlanywhere.general sybase.public.sqlanywhere.general


Discuss optimizer statistics 11.0.1 2250 in the sybase.public.sqlanywhere.general forum.



Reply
 
Thread Tools Display Modes
  #1  
Old   
Martin
 
Posts: n/a

Default optimizer statistics 11.0.1 2250 - 10-30-2009 , 06:39 AM






Hi,

is it possible to influence the value which is displayed as max_steps in the
syscolstat view?

I have a table with a varchar column containing 9 Mio nearly unique values
maxsteps displays 200 for this column.

Does anyone know a way how to display the histogram for a varchar column
I can use the estimate function to display the estimated percentage for a
specific value, but how to display the whole histogram?

background of my question is that I have had a time during which SQL
anywhere estimated a coverage of 10% for a single value match inside the
above mentioned column

Reply With Quote
Reply




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Powered by vBulletin Version 3.5.3
Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.