Friday, March 30, 2012

index statistics are created when?

If the auto create stats and auto update stats is off (actually the value is null) at the db level - are stats generated when an index is recreated?

Additionaly, running the sp_autostats on the above db shows that the auto update stats are on. Where is the option to set it on for an object rather than the db?

Mike

I just read by Kalen that if the options are false (off) this overrides the table level. Still not clear on what occurs when options are <null>True when you run DBCC DBREINDEX those stats will be updated too.

SP_AUTOSTATS is used to display or change the automatic UPDATE STATISTICS setting for a specific index and statistics, or for all indexes and statistics for a given table or indexed view in the current database.

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