[
https://issues.apache.org/jira/browse/DRILL-2256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hanifi Gunes updated DRILL-2256:
--------------------------------
Priority: Minor (was: Major)
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
