Postgres 12

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CREATE TYPE something_e AS ENUM('OPEN', 'CLOSE');
CREATE DOMAIN something_t AS something_e NOT NULL DEFAULT 'OPEN';
CREATE TABLE xxx (
something something_t
);
select * from xxx where something = 'OPEN'
ERROR:  operator does not exist: something_t = unknown
LINE 1: select * from xxx where something = 'OPEN'
                                          ^
HINT:  No operator matches the given name and argument types. You might need to add explicit type casts.


select * from xxx where something = 'OPEN'::something_t
ERROR:  operator does not exist: something_t = something_t
LINE 1: select * from xxx where something = 'OPEN'::something_t
                                          ^
HINT:  No operator matches the given name and argument types. You might need to add explicit type casts.


select * from xxx where something::text = 'OPEN'