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https://issues.apache.org/jira/browse/HIVE-21465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16795303#comment-16795303
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Hive QA commented on HIVE-21465:
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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}  8m 
37s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
12s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
42s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  4m 
21s{color} | {color:blue} ql in master has 2255 extant Findbugs warnings. 
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  
6s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
36s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
14s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 
14s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
43s{color} | {color:red} ql: The patch generated 3 new + 9 unchanged - 23 fixed 
= 12 total (was 32) {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}  4m 
35s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  
6s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
17s{color} | {color:red} The patch generated 1 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 26m  5s{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 
3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-16559/dev-support/hive-personality.sh
 |
| git revision | master / 36bd89d |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-16559/yetus/diff-checkstyle-ql.txt
 |
| asflicense | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-16559/yetus/patch-asflicense-problems.txt
 |
| modules | C: ql U: ql |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-16559/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> Introduce a base abstract VectorExpression to eliminate further code 
> duplications
> ---------------------------------------------------------------------------------
>
>                 Key: HIVE-21465
>                 URL: https://issues.apache.org/jira/browse/HIVE-21465
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Laszlo Bodor
>            Assignee: Laszlo Bodor
>            Priority: Major
>         Attachments: HIVE-21465.01.patch
>
>
> In vectorized expressions, from time to time, I see a similar/same logic to 
> be repeated, which always consists of some stuff like:
> 1. some inner loops (even the comments are the same)
> {code}
> grep -iRH "Set isNull before call in case it changes it mind" | grep 
> "ql/src/java/org/apache/hadoop/hive/ql/exec/vector/expressions/"
> {code}
> 2. call to an actual "business logic" function ==> 1 line which could be 
> abstracted... and it has been abstracted in hive codebase in n different 
> cases.
> However, an abstract BaseVectorExpression would not force anybody to extend 
> it instead of VectorExpression and not copy the code again, but it could be a 
> good start and an example.



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