On 10/31/23 08:25, Corey Huinker wrote:
>
> Attached is v2 of this patch.
>
> New features:
> * imports index statistics. This is not strictly accurate: it
> re-computes index statistics the same as ANALYZE does, which is to
> say it derives those stats entirely from table column stats, which
> are imported, so in that sense we're getting index stats without
> touching the heap.
Maybe I just don't understand, but I'm pretty sure ANALYZE does not
derive index stats from column stats. It actually builds them from the
row sample.
> * now support extended statistics except for MCV, which is currently
> serialized as an difficult-to-decompose bytea field.
Doesn't pg_mcv_list_items() already do all the heavy work?
regards
--
Tomas Vondra
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