Equivalent to exclusion constraint composed of integer and range

Question

I need to have something equivalent to this exclusion constraint

drop table if exists t;
create table t (
    i int,
    tsr tstzrange,
    excl         


        

Answer 1

You need to install the additional module btree_gist to make it work. The module installs the missing operator class.

Details in this related answer:
Exclusion constraint on a bitstring column with bitwise AND operator

More at this answer on dba.SE:
PostgreSQL EXCLUDE USING error: Data type integer has no default operator class