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Cardinality estimation for group by - Mailing list pgsql-hackers

From	Chenxi Li
Subject	Cardinality estimation for group by
Date	October 4, 2016 15:05:15
Msg-id	CAJQBB7Khy6N70phZXSqGNXOyuiSeukwM4hc0PBXD5bsmU0=pzw@mail.gmail.com Whole thread Raw
Responses	Re: Cardinality estimation for group by (Robert Haas <robertmhaas@gmail.com>)
List	pgsql-hackers

Friends,

How is cardinality estimation for "group by" is done and where is the code doing that?

Best Regards,

Chenxi Li

From: Amit Khandekar
Date: 04 October 2016, 14:54:35
Subject: Re: asynchronous execution

From: Robert Haas
Date: 04 October 2016, 16:01:38
Subject: Re: pnstrdup considered armed and dangerous