Schedule - PGConf.DE 2022

An Overview of Extended Statistics In PostgreSQL

Date: 2022-05-13
Time: 14:40–15:25
Room: South Dakota
Level: Intermediate
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PostgreSQL 11 added the ability to define optimizer statistics on multiple columns, to improve cardinality estimates for correlated columns, etc. Later PostgreSQL versions improved this further to build more complex statistics types, define statistics on expressions, and so on. I'll show you what issues this aims to address, what gaps we still have, and what patches are in the queue for PostgreSQL 15.


Tomas Vondra