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Re: timestamp, datetime as default value as current_timestamp [PARTITION]
Posted by: Mattias Jonsson
Date: September 05, 2012 12:36AM

> 3. the optimizer will use a fraction of the partitions (10 first up to now, that may be fixed in a later release) to estimate the index cardinalities.

This was changed in 5.5.23 as a fix for bug#13694811 (better use 5.5.26+).

It will now use a fraction (logarithmic proportional to the number of partitions) of the used partitions ordered by number of records in the partitions.

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Re: timestamp, datetime as default value as current_timestamp [PARTITION]
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September 05, 2012 12:36AM


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