set hive.support.concurrency=true; set hive.txn.manager=org.apache.hadoop.hive.ql.lockmgr.DbTxnManager; set hive.enforce.bucketing=true; create table foo(a int, b varchar(128)) partitioned by (ds string) clustered by (a) into 2 buckets stored as orc TBLPROPERTIES ('transactional'='true'); update foo set a = 5;