Postgres 选择枚举数组中的特定数组

Question

鉴于这个例子：

桌子：

CREATE TABLE public.animals
(
  name character varying(64),
  whitelist animal_whitelist[]
)

自定义枚举类型animal_whitelist：

CREATE TYPE public.animal_whitelist AS ENUM
  ('dog',
  'cat',
  'bird');

我怎样才能专门选择白名单。

在伪代码中，这是我想要选择的。

• 任何animal_whitelist等于的行dog
• 任何animal_whitelist等于和的行dog cat
• animal_whitelist等于或的任何行dog cat
• 任何行，其中animal_whitelist是不是 dog，cat或bird

Answer 1

请检查这一个：

    insert into animals ("name", "whitelist") values ('bobic', array['dog']::animal_whitelist[]);
insert into animals ("name", "whitelist") values ('barsic', array['cat']::animal_whitelist[]);
insert into animals ("name", "whitelist") values ('pet', array['dog', 'cat', 'bird']::animal_whitelist[]);
insert into animals ("name") values ('jim');


-- Any rows where the animal_whitelist equals dog
select * from animals where  array['dog']::animal_whitelist[] = "whitelist" ;

-- Any rows where the animal_whitelist equals dog and cat
select * from animals where  array['dog', 'cat']::animal_whitelist[] = "whitelist" ;

-- Any rows where the animal_whitelist equals dog or cat
select * from animals where  array['dog', 'cat']::animal_whitelist[] <@ "whitelist" ;

-- Any rows where the animal_whitelist is not dog, cat, or bird
select * from animals where not array['dog', 'cat', 'bird']::animal_whitelist[] && "whitelist";