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https://issues.apache.org/jira/browse/HIVE-17626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16387688#comment-16387688
 ] 

Hive QA commented on HIVE-17626:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  
0s{color} | {color:blue} Findbugs executables are not available. {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}  0m 
18s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  6m 
43s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 
52s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  3m 
29s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  7m 
15s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m  
8s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  8m 
23s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 
52s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  6m 
52s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
14s{color} | {color:green} The patch common passed checkstyle {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  2m  
1s{color} | {color:red} root: The patch generated 85 new + 1956 unchanged - 168 
fixed = 2041 total (was 2124) {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
10s{color} | {color:green} druid-handler: The patch generated 0 new + 1 
unchanged - 1 fixed = 1 total (was 2) {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
13s{color} | {color:green} itests/util: The patch generated 0 new + 103 
unchanged - 1 fixed = 103 total (was 104) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
51s{color} | {color:red} ql: The patch generated 84 new + 1424 unchanged - 164 
fixed = 1508 total (was 1588) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
13s{color} | {color:red} standalone-metastore: The patch generated 1 new + 3 
unchanged - 2 fixed = 4 total (was 5) {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  
0s{color} | {color:red} The patch has 1 line(s) that end in whitespace. Use git 
apply --whitespace=fix <<patch_file>>. Refer https://git-scm.com/docs/git-apply 
{color} |
| {color:green}+1{color} | {color:green} xml {color} | {color:green}  0m  
1s{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  7m  
5s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
13s{color} | {color:red} The patch generated 49 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 51m 39s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Optional Tests |  asflicense  javac  javadoc  findbugs  checkstyle  compile  
xml  |
| 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-9508/dev-support/hive-personality.sh
 |
| git revision | master / 8d88cfa |
| Default Java | 1.8.0_111 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9508/yetus/diff-checkstyle-root.txt
 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9508/yetus/diff-checkstyle-ql.txt
 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9508/yetus/diff-checkstyle-standalone-metastore.txt
 |
| whitespace | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9508/yetus/whitespace-eol.txt 
|
| asflicense | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9508/yetus/patch-asflicense-problems.txt
 |
| modules | C: common . druid-handler itests itests/util ql 
standalone-metastore U: . |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9508/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> Query reoptimization using cached runtime statistics
> ----------------------------------------------------
>
>                 Key: HIVE-17626
>                 URL: https://issues.apache.org/jira/browse/HIVE-17626
>             Project: Hive
>          Issue Type: New Feature
>          Components: Logical Optimizer
>    Affects Versions: 3.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Zoltan Haindrich
>            Priority: Major
>         Attachments: HIVE-17626.01.patch, HIVE-17626.01wip01.patch, 
> HIVE-17626.02.patch, HIVE-17626.03.patch, HIVE-17626.04.patch, 
> HIVE-17626.05.patch, HIVE-17626.06.patch, HIVE-17626.07A.patch, 
> HIVE-17626.07B.patch, HIVE-17626.08.patch, HIVE-17626.09.patch, 
> HIVE-17626.10.patch, HIVE-17626.11.patch, runtimestats.patch
>
>
> Something similar to "EXPLAIN ANALYZE" where we annotate explain plan with 
> actual and estimated statistics. The runtime stats can be cached at query 
> level and subsequent execution of the same query can make use of the cached 
> statistics from the previous run for better optimization. 
> Some use cases,
> 1) re-planning join query (mapjoin failures can be converted to shuffle joins)
> 2) better statistics for table scan operator if dynamic partition pruning is 
> involved
> 3) Better estimates for bloom filter initialization (setting expected entries 
> during merge)
> This can extended to support wider queries by caching fragments of operator 
> plans scanning same table(s) or matching some operator sequences.



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