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https://issues.apache.org/jira/browse/HIVE-21778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17051914#comment-17051914
 ] 

Hive QA commented on HIVE-21778:
--------------------------------

| (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 
35s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
3s{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}  3m 
49s{color} | {color:blue} ql in master has 1531 extant Findbugs warnings. 
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
54s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
25s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
0s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m  
0s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
40s{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}  4m  
1s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
55s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
15s{color} | {color:red} The patch generated 2 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 24m 52s{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-20960/dev-support/hive-personality.sh
 |
| git revision | master / deebfb6 |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.1 |
| asflicense | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-20960/yetus/patch-asflicense-problems.txt
 |
| modules | C: ql U: ql |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-20960/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> CBO: "Struct is not null" gets evaluated as `nullable` always causing filter 
> miss in the query
> ----------------------------------------------------------------------------------------------
>
>                 Key: HIVE-21778
>                 URL: https://issues.apache.org/jira/browse/HIVE-21778
>             Project: Hive
>          Issue Type: Bug
>          Components: CBO
>    Affects Versions: 4.0.0, 2.3.5
>            Reporter: Rajesh Balamohan
>            Assignee: Vineet Garg
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-21778.1.patch, HIVE-21778.2.patch, 
> HIVE-21778.3.patch, HIVE-21778.4.patch, HIVE-21778.5.patch, 
> HIVE-21778.6.patch, test_null.q, test_null.q.out
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> {noformat}
> drop table if exists test_struct;
> CREATE external TABLE test_struct
> (
>   f1 string,
>   demo_struct struct<f1:string, f2:string, f3:string>,
>   datestr string
> );
> set hive.cbo.enable=true;
> explain select * from etltmp.test_struct where datestr='2019-01-01' and 
> demo_struct is not null;
> STAGE PLANS:
>   Stage: Stage-0
>     Fetch Operator
>       limit: -1
>       Processor Tree:
>         TableScan
>           alias: test_struct
>           filterExpr: (datestr = '2019-01-01') (type: boolean) <----- Note 
> that demo_struct filter is not added here
>           Filter Operator
>             predicate: (datestr = '2019-01-01') (type: boolean)
>             Select Operator
>               expressions: f1 (type: string), demo_struct (type: 
> struct<f1:string,f2:string,f3:string>), '2019-01-01' (type: string)
>               outputColumnNames: _col0, _col1, _col2
>               ListSink
> set hive.cbo.enable=false;
> explain select * from etltmp.test_struct where datestr='2019-01-01' and 
> demo_struct is not null;
> STAGE PLANS:
>   Stage: Stage-0
>     Fetch Operator
>       limit: -1
>       Processor Tree:
>         TableScan
>           alias: test_struct
>           filterExpr: ((datestr = '2019-01-01') and demo_struct is not null) 
> (type: boolean) <----- Note that demo_struct filter is added when CBO is 
> turned off
>           Filter Operator
>             predicate: ((datestr = '2019-01-01') and demo_struct is not null) 
> (type: boolean)
>             Select Operator
>               expressions: f1 (type: string), demo_struct (type: 
> struct<f1:string,f2:string,f3:string>), '2019-01-01' (type: string)
>               outputColumnNames: _col0, _col1, _col2
>               ListSink
> {noformat}
> In CalcitePlanner::genFilterRelNode, the following code misses to evaluate 
> this filter. 
> {noformat}
> RexNode factoredFilterExpr = RexUtil
>           .pullFactors(cluster.getRexBuilder(), convertedFilterExpr);
> {noformat}
> Note that even if we add `demo_struct.f1` it would end up pushing the filter 
> correctly. 



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