[
https://issues.apache.org/jira/browse/HIVE-26006?focusedWorklogId=737598&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-737598
]
ASF GitHub Bot logged work on HIVE-26006:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 07/Mar/22 16:16
Start Date: 07/Mar/22 16:16
Worklog Time Spent: 10m
Work Description: kasakrisz opened a new pull request #3082:
URL: https://github.com/apache/hive/pull/3082
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### What changes were proposed in this pull request?
When pushing TNK through GBY the new TNK operator created on top should
contain the common key prefix of the original TNK and the GBY.
```
Group By Operator
keys: KEY._col0 (type: int), KEY._col1 (type: int), KEY._col2 (type: int),
KEY._col3 (type: int)
Top N Key Operator
keys: _col0 (type: int), _col2 (type: int), _col3 (type: int)
Map-reduce partition columns: _col0 (type: int), _col2 (type: int)
```
The common key prefix is: `_col0 (type: int)`
Map-reduce partition columns is also a prefix of the keys. When calculating
the new TNK's Map-reduce partition columns take the whole common key prefix if
common key prefix of the original TNK and the GBY is smaller than the original
TNK's Map-reduce partition columns.
### Why are the changes needed?
When calculating the new TNK's Map-reduce partition columns
`ArrayIndexOutOfBoundsException` is thrown when the common key prefix of the
original TNK and the GBY is smaller than the original TNK's Map-reduce
partition columns.
### Does this PR introduce _any_ user-facing change?
No `ArrayIndexOutOfBoundsException` is thrown.
### How was this patch tested?
```
mvn test -Dtest.output.overwrite -DskipSparkTests
-Dtest=TestMiniLlapLocalCliDriver -Dqfile=ptf_tnk.q -pl itests/qtest -Pitests
```
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Issue Time Tracking
-------------------
Worklog Id: (was: 737598)
Remaining Estimate: 0h
Time Spent: 10m
> TopNKey and PTF with more than one column is failing with IOBE
> --------------------------------------------------------------
>
> Key: HIVE-26006
> URL: https://issues.apache.org/jira/browse/HIVE-26006
> Project: Hive
> Issue Type: Bug
> Reporter: Naresh P R
> Assignee: Krisztian Kasa
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> {code:java}
> java.lang.IndexOutOfBoundsException: toIndex = 2
> at java.util.ArrayList.subListRangeCheck(ArrayList.java:1014)
> at java.util.ArrayList.subList(ArrayList.java:1006)
> at org.apache.hadoop.hive.ql.plan.TopNKeyDesc.combine(TopNKeyDesc.java:201)
> at
> org.apache.hadoop.hive.ql.optimizer.topnkey.TopNKeyPushdownProcessor.pushdownThroughGroupBy(TopNKeyPushdownProcessor.java:162)
> at
> org.apache.hadoop.hive.ql.optimizer.topnkey.TopNKeyPushdownProcessor.pushdown(TopNKeyPushdownProcessor.java:76)
> at
> org.apache.hadoop.hive.ql.optimizer.topnkey.TopNKeyPushdownProcessor.process(TopNKeyPushdownProcessor.java:57)
> at
> org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:90)
> at
> org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatchAndReturn(DefaultGraphWalker.java:105)
> at
> org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:89)
> at
> org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.walk(DefaultGraphWalker.java:158)
> at
> org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:120)
> at
> org.apache.hadoop.hive.ql.parse.TezCompiler.runTopNKeyOptimization(TezCompiler.java:1305)
> at
> org.apache.hadoop.hive.ql.parse.TezCompiler.optimizeOperatorPlan(TezCompiler.java:173)
> at org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:159)
> at
> org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:12646)
> at
> org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:358)
> at
> org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:283)
> at org.apache.hadoop.hive.ql.Compiler.analyze(Compiler.java:219)
> at org.apache.hadoop.hive.ql.Compiler.compile(Compiler.java:103)
> at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:215){code}
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