The article seems to have changed since I commented.

DiabloD3 • today at 6:00 AM • 2 replies • view on HN

It had the same stuff a month ago.

Why don't he use GROUP BY on indexed columns was my first thought also.

I guess we just have to patiently wait for the OP to hopefully read Postgres documentation from postgreSQL 10.x before correcting the article again.

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