Re: Columns correlation and adaptive query optimization

Konstantin Knizhnik <k.knizhnik@postgrespro.ru>

From: Konstantin Knizhnik <k.knizhnik@postgrespro.ru>

To: pgsql-hackers@postgresql.org

Date: 2019-12-24T08:15:40Z

Lists: pgsql-hackers

Attachments

auto_explain_create_statistic-3.patch (text/x-patch) patch

New version of patch implicitly adding multicolumn statistic in 
auto_explain extension and using it in optimizer for more precise 
estimation of join selectivity.
This patch fixes race condition while adding statistics and restricts 
generated statistic name to fit in 64 bytes (NameData).

-- 
Konstantin Knizhnik
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company