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https://issues.apache.org/jira/browse/HIVE-18724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16607608#comment-16607608
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Hive QA commented on HIVE-18724:
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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:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green} The patch has no whitespace issues. {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
42s{color} | {color:green} The patch does not generate ASF License warnings.
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| {color:black}{color} | {color:black} {color} | {color:black} 1m 22s{color} |
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|| Subsystem || Report/Notes ||
| Optional Tests | asflicense |
| 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-13650/dev-support/hive-personality.sh
|
| git revision | master / b1a917c |
| modules | C: ql U: ql |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-13650/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
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> Improve error handling for subqueries referencing columns(correlated) of its
> grand-parent query
> -----------------------------------------------------------------------------------------------
>
> Key: HIVE-18724
> URL: https://issues.apache.org/jira/browse/HIVE-18724
> Project: Hive
> Issue Type: Improvement
> Components: Query Planning
> Reporter: Vineet Garg
> Assignee: Igor Kryvenko
> Priority: Major
> Attachments: HIVE-18724.01.patch, HIVE-18724.02.patch
>
>
> Currently Hive doesn't allow correlated subqueries which refer to columns of
> grand parent query e.g.
> {code:sql}
> select t1.a from t t1 where t1.b IN (select t2.c from t t2 where t2.a IN
> (select max(t3.b) from t t3, t t4 where t3.a=t2.a and t3.b=t1.b))
> {code}
> In this example inner most query has column reference {{t3.b=t1.b}} where
> {{t1.b}} references outer most query.
> The error which Hive compiler throw is
> {noformat}
> FAILED: SemanticException Line 0:-1 Unsupported SubQuery Expression 'a':
> Nested SubQuery expressions are not supported.
> {noformat}
> This is very misleading since Hive does support Nested subqueries.
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