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https://issues.apache.org/jira/browse/DRILL-2139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16886901#comment-16886901
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ASF GitHub Bot commented on DRILL-2139:
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vvysotskyi commented on issue #237: DRILL-2139: Support distinct over star
column
URL: https://github.com/apache/drill/pull/237#issuecomment-512196241
@hsuanyi, what about the case when a new column appears during reading the
table in one of the consequent batches. Will it be handled correctly with the
changes in this PR?
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> Star is not expanded correctly in "select distinct" query
> ---------------------------------------------------------
>
> Key: DRILL-2139
> URL: https://issues.apache.org/jira/browse/DRILL-2139
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 0.8.0
> Reporter: Victoria Markman
> Assignee: Sean Hsuan-Yi Chu
> Priority: Critical
> Fix For: Future
>
>
> {code}
> 0: jdbc:drill:schema=dfs> select distinct * from t1;
> +------------+
> | * |
> +------------+
> | null |
> +------------+
> 1 row selected (0.14 seconds)
> 0: jdbc:drill:schema=dfs> select distinct * from `test.json`;
> +------------+
> | * |
> +------------+
> | null |
> +------------+
> 1 row selected (0.163 seconds)
> {code}
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