Re: Use streaming read API in pgstattuple.

Hm, CI fails[0]
This is most likely the reason why `select
pgstattuple('test_hashidx');` was omitted in pgstattuple tests: we are
not guaranteed about the number of bucket_pages in the empty index.
Maybe we should populate base relation and check for only non-volatile
fields like live_items and version?


[0]
https://api.cirrus-ci.com/v1/artifact/task/5037800950595584/testrun/build-32/testrun/pgstattuple/regress/regression.diffs

-- 
Best regards,
Kirill Reshke