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https://issues.apache.org/jira/browse/DRILL-5792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16180813#comment-16180813
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ASF GitHub Bot commented on DRILL-5792:
---------------------------------------
GitHub user vdiravka opened a pull request:
https://github.com/apache/drill/pull/961
DRILL-5792: CONVERT_FROM_JSON on an empty file throws runtime exception
Easyfix - using GenericAccessor for UntypedNullVector.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/vdiravka/drill DRILL-5792
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/961.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #961
----
commit 9d3a92b963271897565cfd81098050b702fcdac5
Author: Vitalii Diravka <[email protected]>
Date: 2017-09-26T11:06:45Z
DRILL-5792: CONVERT_FROM_JSON on an empty file throws runtime exception
----
> CONVERT_FROM_JSON on an empty file throws runtime exception
> -----------------------------------------------------------
>
> Key: DRILL-5792
> URL: https://issues.apache.org/jira/browse/DRILL-5792
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Prasad Nagaraj Subramanya
> Assignee: Vitalii Diravka
>
> Sample query to reproduce-
> {code}
> SELECT CONVERT_FROM(columns[1], 'JSON') as col1 FROM dfs.`file1.tbl`;
> {code}
> Throws runtime exception-
> {code}
> Error: Unexpected RuntimeException: java.lang.UnsupportedOperationException:
> Unable to find sql accessor for minor type [NULL] and mode [OPTIONAL]
> (state=,code=0)
> {code}
> The expected result is that the query returns 0 rows.
> Issue observed with commit id - 7a900b71fd269aceee7301afb18fd8d303df5bcd
> Expected result-
> {code}
> +-------+
> | col1 |
> +-------+
> +-------+
> {code}
> Works with drill 1.11.0
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