Hi po 26. 6. 2023 v 19:41 odesÃlatel James Coleman <jtc...@gmail.com> napsal:
> Hello, > > Have we ever discussed running an analyze immediately after creating a > table? > > Consider the following: > > create table stats(i int, t text not null); > explain select * from stats; > Seq Scan on stats (cost=0.00..22.70 rows=1270 width=36 > analyze stats; > explain select * from stats; > Seq Scan on stats (cost=0.00..0.00 rows=1 width=36) > > Combined with rapidly increasing error margin on row estimates when > adding joins means that a query joining to a bunch of empty tables > when a database first starts up can result in some pretty wild plan > costs. > > This feels like a simple idea to me, and so I assume people have > considered it before. If so, I'd like to understand why the conclusion > was not to do it, or, alternatively if it's a lack of tuits. > I like this. On the second hand, described behaviour is designed for ensuring of back compatibility. Regards Pavel > Regards, > James Coleman > > >
