On 05/15/2013 10:52 AM, Heikki Linnakangas wrote:
I think it would be pretty straightforward to use such a statistic, once we have it. So perhaps we should get started by allowing the DBA to set a correlation metric manually, and use that in the planner.
The planner already kinda does this with functional indexes. It would definitely be nice to override the stats with known correlations when possible.
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