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Posted to dev@drill.apache.org by "Chris Westin (JIRA)" <ji...@apache.org> on 2015/02/20 21:04:12 UTC
[jira] [Resolved] (DRILL-2256) Flatten on an empty list fails.
[ https://issues.apache.org/jira/browse/DRILL-2256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Westin resolved DRILL-2256.
---------------------------------
Resolution: Duplicate
> Flatten on an empty list fails.
> -------------------------------
>
> Key: DRILL-2256
> URL: https://issues.apache.org/jira/browse/DRILL-2256
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Hanifi Gunes
> Priority: Minor
>
> Running
> {code}
> select flatten(empty) from data.json
> {code}
> on
> {code:title=data.json}
> {"empty": [ [] ] }
> {code}
> fails with
> {code}
> java.lang.NullPointerException
> at org.apache.drill.exec.vector.complex.RepeatedListVector$RepeatedListTransferPair.<init>(RepeatedListVector.java:273) ~[classes/:na]
> at org.apache.drill.exec.vector.complex.RepeatedListVector$RepeatedListTransferPair.<init>(RepeatedListVector.java:265) ~[classes/:na]
> at org.apache.drill.exec.vector.complex.RepeatedListVector.makeTransferPair(RepeatedListVector.java:322) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.setupNewSchema(ProjectRecordBatch.java:406) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:78) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:134) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:142) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:118) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:99) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:89) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:51) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.flatten.FlattenRecordBatch.innerNext(FlattenRecordBatch.java:122) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:142) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:118) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:99) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:89) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:51) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:134) ~[classes/:na]
> at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:142) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:118) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:97) ~[classes/:na]
> at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57) ~[classes/:na]
> at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:116) ~[classes/:na]
> at org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:303) [classes/:na]
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_65]
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_65]
> at java.lang.Thread.run(Thread.java:745) [na:1.7.0_65]
> {code}
> I believe, flatten should have output as many nulls as the number of existing records/rows.
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