[jira] [Resolved] (DRILL-1536) Selecting a null valued field fails on json input format with an irrelevant error message

["Hanifi Gunes (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-1536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hanifi Gunes resolved DRILL-1536.
---------------------------------
    Resolution: Fixed

A superset of the problem described in this ticket is fixed by DRILL-1547. Marking as resolved.

> Selecting a null valued field fails on json input format with an irrelevant error message
> -----------------------------------------------------------------------------------------
>
>                 Key: DRILL-1536
>                 URL: https://issues.apache.org/jira/browse/DRILL-1536
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Hanifi Gunes
>            Assignee: Jason Altekruse
>
> Running 
> {code:sql}
> select t.id from dfs.`data/simple.json` t;
> {code}
> against
> {panel:title=simple.json}
> \{"id":null\}
> {panel}
> throws
> {panel}
> org.apache.drill.common.exceptions.DrillRuntimeException: Record is too big to fit into allocated ValueVector
> 	at org.apache.drill.exec.store.easy.json.JSONRecordReader2.next(JSONRecordReader2.java:121)
> 	at org.apache.drill.exec.physical.impl.ScanBatch.next(ScanBatch.java:158)
> 	at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:117)
> 	at org.apache.drill.exec.physical.impl.producer.ProducerConsumerBatch$Producer.run(ProducerConsumerBatch.java:128)
> 	at java.lang.Thread.run(Thread.java:745)
> {panel}
> We need to make sure a value vector for the field `id` is allocated before attempting to manipulate the vector. Currently JsonReader does nothing beyond a bound check when encountered with a null value. We should implement proper null value handling.
> Also the above error message should precisely reflect the root cause of the problem. Thrown exception in this case is irrelevant and misleading.



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