Tom Lane wrote:
> We have also talked about solving the multi-column statistics problem
> (which, at its core, is "which combinations of columns are worth
> accumulating stats for?" --- you can't possibly store stats for every
> combination!) by having what would amount to hints from the DBA saying
> "keep stats for these combinations".
>
This strikes me intuitively as the most likely candidate so far for
improvement. I'm much more interested in schemes that will improve the
stats system, rather than providing a way around it.
cheers
andrew