Ganesha Shreedhara created HIVE-21660: -----------------------------------------
Summary: Wrong result when union all and later view with explode is used Key: HIVE-21660 URL: https://issues.apache.org/jira/browse/HIVE-21660 Project: Hive Issue Type: Bug Affects Versions: 3.1.1 Reporter: Ganesha Shreedhara There is a data loss when the data is inserted to a partitioned table using union all and lateral view with explode. *Steps to reproduce:* {code:java} create table t1 (id int, dt string); insert into t1 values (2, '2019-04-01'); create table t3( id int, dates array<string>); insert into t2 select 1 as id, array('2019-01-01','2019-01-02','2019-01-03') as dates; create table dst (id int) partitioned by (dt string); set hive.exec.dynamic.partition.mode=nonstrict; set hive.exec.dynamic.partition=true; insert overwrite table dst partition (dt) select t.id, t.dt from ( select id, dt from t1 union all select id, dts as dt from t2 tt2 lateral view explode(tt2.dates) dd as dts ) t; select * from dst_hdfs; {code} *Actual Result:* {code:java} +--------------+--------------+ | 2 | 2019-04-01 | +--------------+--------------+{code} *Expected Result* (Run only the select part from the above insert query)*:* {code:java} +-------+------------+ | 2 | 2019-04-01 | | 1 | 2019-01-01 | | 1 | 2019-01-02 | | 1 | 2019-01-03 | +-------+------------+{code} Data retrieved using union all and lateral view with explode from second table is missing. -- This message was sent by Atlassian JIRA (v7.6.3#76005)