"Jim C. Nasby" <[EMAIL PROTECTED]> writes:
> It might be worth coming up with a different means to store the
> histogram for the multi-column case.
A separate array for each column involved seems a whole lot less
fragile than pretending we can handle mixed-type arrays.
We probably need a different catalog anyway, or at least a reimagining
of pg_statistic, since it doesn't hold more than one value of staattnum
per row.
regards, tom lane
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
