Getting the last word from a Postgres string, declaratively

Question

[EDIT] original title of this question was \"Getting the last element of a Postgres array, declaratively\"

How to obtain the last element of the array in Postgr

Answer 1

You can do the following:

SELECT (ARRAY[1,8,3,7])[array_upper(ARRAY[1,8,3,7], 1)];

I.e. get the index and then select that last element.