Update lower/upper bound of range type

Question

I have column of tstzrange type (timestamp with time zone range) and I need to update only upper or lower bound of this value (and keep inclusive/exclusive boundari

Answer 1

I found function I missed, it's possible to do that like this

UPDATE table
SET
    my_column = tstzrange(
        lower(my_column),
        now(),
        concat(
            CASE WHEN lower_inc(my_column) THEN '[' ELSE '(' END,
            CASE WHEN upper_inc(my_column) THEN ']' ELSE ')' END
        )
    )

It would be better to create function for this probably. Or is there any other (simpler/better) solution?