-- example taken from https://www.postgresql.org/docs/11/rangetypes.html#RANGETYPES-EXAMPLES
create table reservations (room   int
, during tsrange
);insert intoreservations
values(1108, tsrange('2010-01-01 14:30', '2010-01-01 15:30'));

curl "http://localhost:3000/reservations"

[{"room":1108,"during":"[\"2010-01-01 14:30:00\",\"2010-01-01 15:30:00\")"}
]

create or replace function tsrange_to_json(tsrange) returns json as $$select json_build_object('lower', lower($1), 'upper', upper($1), 'lower_inc', lower_inc($1), 'upper_inc', upper_inc($1));
$$ language sql;

create cast (tsrange as json) with function tsrange_to_json(tsrange) as assignment;

curl "http://localhost:3000/reservations?select=room,during::json"

[{"room":1108,"during":{"lower" : "2010-01-01T14:30:00","upper" : "2010-01-01T15:30:00","lower_inc" : true,"upper_inc" : false}}
]

注意

如果您不想为内置类型修改CAST，则可以选择 为自己的类型创建自定义类型，tsrange然后添加自己的CAST。

create type mytsrange as range (subtype = timestamp, subtype_diff = tsrange_subdiff);-- define column types and casting function analoguously to the above example
-- ...create cast (mytsrange as json) with function mytsrange_to_json(mytsrange) as assignment;

create table public.people(id        int  primary key
, full_name text
);

create schema if not exists private;-- For simplicity's sake the table is devoid of constraints/domains on email, phone, etc.
create table private.details(id         int  primary key references public.people
, email      text
, phone      text
, birthday   date
, occupation text
, company    text
);-- other database objects in this schema
-- ...
-- ...

create view public.public_details as
selectid, occupation, company
fromprivate.details;

insert intopublic.people
values(1, 'John Doe'), (2, 'Jane Doe');insert intoprivate.details
values(1, 'jhon@fake.com', '772-323-5433', '1990-02-01', 'Transportation attendant', 'Body Fate'),(2, 'jane@fake.com', '480-474-6571', '1980-04-21', 'Geotechnical engineer', 'Earthworks Garden Kare');

重要

确保PostgREST的模式缓存是最新的。请参阅架构重载。

curl "http://localhost:3000/people?select=full_name,public_details(occupation,company)"

[{"full_name":"John Doe","public_details":[{"occupation":"Transportation attendant","company":"Body Fate"}]},{"full_name":"Jane Doe","public_details":[{"occupation":"Geotechnical engineer","company":"Earthworks Garden Kare"}]}
]