如何创建包含一组枚举值的PostgreSQL列？

Question

I like that I can create new enum types in PostgreSQL . But what if I want a column value that is a set of enum values. Do I need to implement that manually with an integer column type and bitwise operators, or is there a way to keep using the enums by name?

CREATE TYPE foo AS ENUM ('none', 'loud', 'bright', 'cheap')
CREATE TABLE t (
    id serial,
    properties [set of foo?]
)
...
SELECT * FROM t;
1      loud
2      loud, cheap
3      bright
4      none
...

Answer 1

You can use an array:

CREATE TYPE foo AS ENUM ('none', 'loud', 'bright', 'cheap');
CREATE TABLE t (
    id serial,
    properties foo[]
);