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https://issues.apache.org/jira/browse/DRILL-1749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Altekruse updated DRILL-1749:
-----------------------------------
Attachment: Drill-1749.patch
> Flatten does not work with nested maps/unions.
> ----------------------------------------------
>
> Key: DRILL-1749
> URL: https://issues.apache.org/jira/browse/DRILL-1749
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill
> Affects Versions: 0.6.0, 0.7.0
> Reporter: Hao Zhu
> Priority: Critical
> Attachments: Drill-1749.patch
>
>
> Minimum reproduce :
> {code}
> test1.json
> {"data":
> [{"key":"apple","value":{"cnt":1}}, {"key":"orange","value":{"cnt":2}}]
> }
> select flatten(data) from dfs.tmp.`test1.json` as t;
> +------------+
> | EXPR$0 |
> +------------+
> Query failed: Failure while running fragment.[
> 7e60b3fe-198d-4bc5-b440-e6f7a15cc54f on n3a:31010 ]
> (java.lang.UnsupportedOperationException)
>
> org.apache.drill.exec.vector.complex.MapVector$MapTransferPair.splitAndTransfer():284
>
> org.apache.drill.exec.vector.complex.RepeatedMapVector$SingleMapTransferPair.splitAndTransfer():305
> org.apache.drill.exec.test.generated.FlattenerGen80.flattenRecords():106
>
> org.apache.drill.exec.physical.impl.flatten.FlattenRecordBatch.doWork():155
> org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext():89
>
> org.apache.drill.exec.physical.impl.flatten.FlattenRecordBatch.innerNext():121
> org.apache.drill.exec.record.AbstractRecordBatch.next():106
>
> org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next():124
> org.apache.drill.exec.record.AbstractRecordBatch.next():86
> org.apache.drill.exec.record.AbstractRecordBatch.next():76
> org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext():52
>
> org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext():129
> org.apache.drill.exec.record.AbstractRecordBatch.next():106
>
> org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next():124
> org.apache.drill.exec.physical.impl.BaseRootExec.next():67
>
> org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext():122
> org.apache.drill.exec.physical.impl.BaseRootExec.next():57
> org.apache.drill.exec.work.fragment.FragmentExecutor.run():113
> org.apache.drill.exec.work.WorkManager$RunnableWrapper.run():249
> .......():0
> java.lang.RuntimeException: java.sql.SQLException: Failure while executing
> query.
> at sqlline.SqlLine$IncrementalRows.hasNext(SqlLine.java:2514)
> at sqlline.SqlLine$TableOutputFormat.print(SqlLine.java:2148)
> at sqlline.SqlLine.print(SqlLine.java:1809)
> at sqlline.SqlLine$Commands.execute(SqlLine.java:3766)
> at sqlline.SqlLine$Commands.sql(SqlLine.java:3663)
> at sqlline.SqlLine.dispatch(SqlLine.java:889)
> at sqlline.SqlLine.begin(SqlLine.java:763)
> at sqlline.SqlLine.start(SqlLine.java:498)
> at sqlline.SqlLine.main(SqlLine.java:460)
> {code}
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