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https://issues.apache.org/jira/browse/DRILL-5845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16215434#comment-16215434
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ASF GitHub Bot commented on DRILL-5845:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/drill/pull/1000
> Columns returned by select with "ORDER BY" and "LIMIT" clauses are not in
> correct order.
> ----------------------------------------------------------------------------------------
>
> Key: DRILL-5845
> URL: https://issues.apache.org/jira/browse/DRILL-5845
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.11.0
> Reporter: Vitalii Diravka
> Assignee: Vitalii Diravka
> Labels: ready-to-commit
> Fix For: 1.12.0
>
>
> Column order is proper for queries with only one clause: ORDER BY or LIMIT.
> For queries with both these clauses column order isn't preserved.
> Test case for reproduce:
> {code}
> 0: jdbc:drill:zk=local> select * from cp.`tpch/nation.parquet` limit 1;
> +--------------+----------+--------------+------------------------------------------------------+
> | n_nationkey | n_name | n_regionkey | n_comment
> |
> +--------------+----------+--------------+------------------------------------------------------+
> | 0 | ALGERIA | 0 | haggle. carefully final deposits
> detect slyly agai |
> +--------------+----------+--------------+------------------------------------------------------+
> 1 row selected (0.181 seconds)
> 0: jdbc:drill:zk=local> select * from cp.`tpch/nation.parquet` order by
> n_name limit 1;
> +------------------------------------------------------+----------+--------------+--------------+
> | n_comment | n_name |
> n_nationkey | n_regionkey |
> +------------------------------------------------------+----------+--------------+--------------+
> | haggle. carefully final deposits detect slyly agai | ALGERIA | 0
> | 0 |
> +------------------------------------------------------+----------+--------------+--------------+
> 1 row selected (0.154 seconds)
> {code}
> For json files the column ordering is not preserved as well:
> {code}
> select * from cp.`employee.json` limit 1;
> select * from cp.`employee.json` order by full_name limit 1;
> {code}
> Perhaps the wrong operator for sorting is used.
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