Re: How does postgres behave if several indexes have (nearly) identical conditions?

["David G. Johnston" <david.g.johnston@xxxxxxxxx>]

On Wednesday, September 8, 2021, Koen De Groote <kdg.dev@xxxxxxxxx> wrote:

create index index_001 on my_table using btree (a001,a002,a003) where a001=true and a002=false;

create index index_002 on my_table using btree (a003) where a001=true and a002=false;

Now take this query:

select * from my_table where a001=true;

Which index will postgres pick? I'm wondering how postgres goes about picking an index to consider.

Neither…since neither partial index condition is present in the where clause of the query.

David J.