How does comparison of different types work in PostgreSQL?

Question

PostgreSQL

I didn't find it in the documentation, I can only guess.

Here both values ​​are converted to timestamp type and compared?

select '2021-01-01'::date = '2021-01-01 12:00'::timestamp;

And here both are cast to type integer or numeric for comparison?
select 5::numeric = 5::integer;

Answer 1

Well, how did you not find it? Here is https://postgrespro.ru/docs/postgresql/14/typeconv