DROP TABLE IF EXISTS t1; create table t1 (id int primary key, value int) engine=rocksdb; insert into t1 values (1,1); SET session transaction isolation level read uncommitted; begin; insert into t1 values (2,1); ERROR HY000: MyRocks supports only READ COMMITTED and REPEATABLE READ isolation levels. Please change from current isolation level READ-UNCOMMITTED select * from t1 where id=1; ERROR HY000: MyRocks supports only READ COMMITTED and REPEATABLE READ isolation levels. Please change from current isolation level READ-UNCOMMITTED rollback; SET session transaction isolation level serializable; begin; insert into t1 values (2,1); ERROR HY000: MyRocks supports only READ COMMITTED and REPEATABLE READ isolation levels. Please change from current isolation level SERIALIZABLE select * from t1 where id=1; ERROR HY000: MyRocks supports only READ COMMITTED and REPEATABLE READ isolation levels. Please change from current isolation level SERIALIZABLE rollback; DROP TABLE t1;