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https://issues.apache.org/jira/browse/HIVE-23006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17080196#comment-17080196
 ] 

Hive QA commented on HIVE-23006:
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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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  1m 
49s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  8m 
 4s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
20s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
56s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m 
34s{color} | {color:blue} common in master has 63 extant Findbugs warnings. 
{color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  3m 
44s{color} | {color:blue} ql in master has 1527 extant Findbugs warnings. 
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
10s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
27s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
43s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
20s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 
20s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
15s{color} | {color:red} common: The patch generated 4 new + 374 unchanged - 0 
fixed = 378 total (was 374) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
41s{color} | {color:red} ql: The patch generated 9 new + 112 unchanged - 0 
fixed = 121 total (was 112) {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  3m 
53s{color} | {color:red} ql generated 3 new + 1526 unchanged - 1 fixed = 1529 
total (was 1527) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  
8s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
14s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 28m 44s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:ql |
|  |  Class org.apache.hadoop.hive.ql.exec.TableScanOperator defines 
non-transient non-serializable instance field probeDecodeContextSet  In 
TableScanOperator.java:instance field probeDecodeContextSet  In 
TableScanOperator.java |
|  |  Class org.apache.hadoop.hive.ql.plan.MapWork defines non-transient 
non-serializable instance field probeDecodeContext  In MapWork.java:instance 
field probeDecodeContext  In MapWork.java |
|  |  Class org.apache.hadoop.hive.ql.plan.TableScanDesc defines non-transient 
non-serializable instance field probeDecodeContext  In 
TableScanDesc.java:instance field probeDecodeContext  In TableScanDesc.java |
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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-21541/dev-support/hive-personality.sh
 |
| git revision | master / 796a9c5 |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.1 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-21541/yetus/diff-checkstyle-common.txt
 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-21541/yetus/diff-checkstyle-ql.txt
 |
| findbugs | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-21541/yetus/new-findbugs-ql.html
 |
| modules | C: common ql itests U: . |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-21541/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> Basic compiler support for Probe MapJoin
> ----------------------------------------
>
>                 Key: HIVE-23006
>                 URL: https://issues.apache.org/jira/browse/HIVE-23006
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Panagiotis Garefalakis
>            Assignee: Panagiotis Garefalakis
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-23006.01.patch, HIVE-23006.02.patch, 
> HIVE-23006.03.patch
>
>          Time Spent: 3h
>  Remaining Estimate: 0h
>
> The decision of pushing down information to the Record reader (potentially 
> reducing decoding time by row-level filtering) should be done at query 
> compilation time.
> This patch adds an extra optimisation step with the goal of finding Table 
> Scan operators that could reduce the number of rows decoded at runtime using 
> extra available information.
> It currently looks for all the available MapJoin operators that could use the 
> smaller HashTable on the probing side (where TS is) to filter-out rows that 
> would never match. 
> To do so the HashTable information is pushed down to the TS properties and 
> then propagated as part of MapWork.
> If the a single TS is used by multiple operators (shared-word), this rule can 
> not be applied.
> This rule can be extended to support static filter expressions like:
> _select * from sales where sold_state = 'PR';_
> This optimisation manly targets the Tez execution engine running on Llap.



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