create hive table and get 'timestamp is not supported'

**I have used HiveDate and HiveTimestamp but still get the error:**
TExecuteStatementResp(status=TStatus(statusCode=3, infoMessages=['*org.apache.hive.service.cli.HiveSQLException:Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask.
**My code is：**
`cols=[]
cols.append(Column('t_int', sqlalchemy.INT))
cols.append(Column('t_decimal', HiveDecimal))
cols.append(Column('t_boolean', sqlalchemy.BOOLEAN))
cols.append(Column('t_smallint', sqlalchemy.SMALLINT))
cols.append(Column('t_date', HiveDate))
cols.append(Column('t_timestamp', HiveTimestamp))
table = Table('gyy_test_table', MetaData(bind=engine), *cols, schema='default')
table.drop(checkfirst=True)
table.create()`