Re: [Maria-developers] problem with partitioning and our storage engine in 5.2

Hi, Zardosht! On Dec 08, Zardosht Kasheff wrote:

We always thought that stats.records was meant to be an estimate, and that an estimate of 0 was ok even if the table was non-empty. We were reporting that stats.records was 0 even though the table was non-empty. Is this assumption wrong?

Yes, it is. stats.records is an estimate (unless you set HA_STATS_RECORDS_IS_EXACT) as long as it's not 0. The value of 0 is always exact, that is if stats.records is 0, MySQL considers the table to be empty, irrespectively from HA_STATS_RECORDS_IS_EXACT. If you aren't sure, return 1. Regards, Sergei