DT
Значит шардирование будет по рандому, и определенный user_id ляжет в случайный шард, куда его кафка понесет. Такое подходит не везде
Size: a a a
DT
AC
DT
VR
Code: 234, e.displayText() = DB::Exception: Not found part 20201221_49_49_0 (or part covering it) neither source table neither remote replicas (version 20.8.12.2 (official build))
D
Code: 234, e.displayText() = DB::Exception: Not found part 20201221_49_49_0 (or part covering it) neither source table neither remote replicas (version 20.8.12.2 (official build))
VR
L
{"test": "1", "arr": [{"id": "1", "title": ""}]}
SELECT * FROM file('test.json', 'JSONEachRow', 'test String, arr Array(Tuple(id String, title String))')
Tuple
использовать Nested - ошибка Array does not start with '[' character: (while reading the value of key arr)BK
MF
l
l
MF
l
BK
AS
l
AS
l
l
AS