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https://issues.apache.org/jira/browse/DRILL-215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13760301#comment-13760301
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Jacques Nadeau commented on DRILL-215:
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One challenge to solving this is we have to ultimately pick a return type for
things like JDBC. What type should we use?
> When selecting an unknown column, the data should be returned as null as
> opposed to throwing an exception
> ---------------------------------------------------------------------------------------------------------
>
> Key: DRILL-215
> URL: https://issues.apache.org/jira/browse/DRILL-215
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Timothy Chen
>
> Running the following query in sqlline:
> select _MAP['NON_EXISTENT_COLUMN'] from "sample-data/nation.parquet";
> Throws an exception. It should simply return nulls for each record in the
> table.
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