By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
Help with an interesting Postgres question: Why isn't an Index Only Scan used on a partition accessed via the parent table?.
CREATE FUNCTION
| cadena | solofecha |
|---|---|
| ejemplo 11/01/2011 | 11/01/2011 |
| otro ejemplo sin nada | null |
| ultimo ejemplo 11/09/2018 | 11/09/2018 |
SELECT 3