On Mon, Oct 3, 2016 at 8:25 PM, Heikki Linnakangas <hlinn...@iki.fi> wrote:
> Yeah. The idea was to use something like pg_node_tree to store all the
> different kinds of statistics, the histogram, the MCV, and the functional
> dependencies, in one datum. Or JSON, maybe. It sounds better than an opaque
> bytea blob, although I'd prefer something more relational. For the
> functional dependencies, I think we could get away with a simple float
> array, so let's do that in the first cut, and revisit this for the MCV and
> histogram later.

OK. A second thing was related to the use of schemas in the new system
catalogs. As mentioned in [1], those could be removed.

> Separate columns for the functional dependencies, the MCVs,
> and the histogram, probably makes sense anyway.


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