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https://issues.apache.org/jira/browse/HIVE-21660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17055972#comment-17055972
 ] 

Hive QA commented on HIVE-21660:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  9m 
 3s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
0s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
39s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  3m 
35s{color} | {color:blue} ql in master has 1532 extant Findbugs warnings. 
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
53s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
20s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
57s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
57s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
38s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  3m 
47s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
54s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
14s{color} | {color:red} The patch generated 2 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 23m 35s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Optional Tests |  asflicense  javac  javadoc  findbugs  checkstyle  compile  |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 
3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-21051/dev-support/hive-personality.sh
 |
| git revision | master / b5de84a |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.1 |
| asflicense | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-21051/yetus/patch-asflicense-problems.txt
 |
| modules | C: ql U: ql |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-21051/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


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> 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
>          Components: Physical Optimizer
>    Affects Versions: 3.1.1
>            Reporter: Ganesha Shreedhara
>            Assignee: Ganesha Shreedhara
>            Priority: Major
>         Attachments: HIVE-21660.1.patch, HIVE-21660.2.patch, HIVE-21660.patch
>
>
> 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 t2( 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;
> {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. 



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