PREHOOK: query: -- HIVE-2901
select x from (select value as x from src union all select NULL as x from src)a limit 10
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: -- HIVE-2901
select x from (select value as x from src union all select NULL as x from src)a limit 10
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
val_238
NULL
val_86
NULL
val_311
NULL
val_27
NULL
val_165
NULL
PREHOOK: query: -- HIVE-4837
select * from (select null as N from src1 group by key UNION ALL select null as N from src1 group by key ) a
PREHOOK: type: QUERY
PREHOOK: Input: default@src1
#### A masked pattern was here ####
POSTHOOK: query: -- HIVE-4837
select * from (select null as N from src1 group by key UNION ALL select null as N from src1 group by key ) a
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src1
#### A masked pattern was here ####
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL