a.sql

CREATE TABLE t_a (
  ts TIMESTAMP,
  hash STRING,
  granularity STRING,
  value FLOAT,
  part_key__generated TIMESTAMP GENERATED ALWAYS AS date_trunc(granularity, ts)
) PARTITIONED BY (granularity, part_key__generated);

INSERT INTO t_a (ts, hash, granularity, value) VALUES (1508848674000, 'abc', 'day', 0.1);

CREATE TABLE t_b (
  ts TIMESTAMP,
  hash STRING,
  granularity STRING,
  value FLOAT,
  part_key__generated TIMESTAMP GENERATED ALWAYS AS date_trunc(granularity, ts),
  PRIMARY KEY (ts, hash, granularity, part_key__generated)
) PARTITIONED BY (granularity, part_key__generated);

INSERT INTO t_b (ts, hash, granularity, value) VALUES (1508848674000, 'abc', 'day', 0.1);

output.log

$ crash --hosts st1.p.fir.io:4200 < test.sql   
CONNECT OK
CREATE OK, 1 row affected  (0.048 sec)
INSERT OK, 1 row affected  (1.006 sec)
CREATE OK, 1 row affected  (0.049 sec)
SQLActionException[SQLParseException: Primary key value must not be NULL]