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https://issues.apache.org/jira/browse/DRILL-1500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aman Sinha resolved DRILL-1500.
-------------------------------
Resolution: Fixed
Added a unit test case, commit #: 7a136ae00
> Partition filtering might lead to an unnecessary column in the result set.
> ---------------------------------------------------------------------------
>
> Key: DRILL-1500
> URL: https://issues.apache.org/jira/browse/DRILL-1500
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Reporter: Jinfeng Ni
> Assignee: Aman Sinha
> Priority: Critical
> Fix For: 0.8.0
>
> Attachments:
> 0001-DRILL-1500-Partial-fix-Don-t-overwrite-top-level-Pro.patch
>
>
> When partition filtering is used together with select * query, Drill might
> return the partitioning column duplicately.
> Q1 :
> {code}
> select * from
> dfs.`/Users/jni/work/incubator-drill/exec/java-exec/src/test/resources/multilevel/parquet`
> where dir0=1994 and dir1='Q1' order by dir0 limit 1;
> +------------+------------+------------+------------+------------+------------+-------------+------------+-----------------+---------------+----------------+--------------+
> | dir00 | dir0 | dir1 | o_clerk | o_comment | o_custkey
> | o_orderdate | o_orderkey | o_orderpriority | o_orderstatus | o_shippriority
> | o_totalprice |
> +------------+------------+------------+------------+------------+------------+-------------+------------+-----------------+---------------+----------------+--------------+
> | 1994 | 1994 | Q1 | Clerk#000000743 | y pending requests
> integrate | 1292 | 1994-01-20 | 66 | 5-LOW | F
> | 0 | 104190.66 |
> +------------+------------+------------+------------+------------+------------+-------------+------------+-----------------+---------------+----------------+--------------+
> 1 row selected (2.097 seconds)
> {code}
> We can see that column "dir0" appeared twice in the result set. In
> comparison, here is the query without partition filtering and the query
> result:
> Q2:
> {code}
> select * from
> dfs.`/Users/jni/work/incubator-drill/exec/java-exec/src/test/resources/multilevel/parquet`
> order by dir0 limit 1;
> +------------+------------+------------+------------+------------+-------------+------------+-----------------+---------------+----------------+--------------+
> | dir0 | dir1 | o_clerk | o_comment | o_custkey |
> o_orderdate | o_orderkey | o_orderpriority | o_orderstatus | o_shippriority |
> o_totalprice |
> +------------+------------+------------+------------+------------+-------------+------------+-----------------+---------------+----------------+--------------+
> | 1994 | Q1 | Clerk#000000743 | y pending requests integrate |
> 1292 | 1994-01-20 | 66 | 5-LOW | F | 0
> | 104190.66 |
> +------------+------------+------------+------------+------------+-------------+------------+-----------------+---------------+----------------+--------------+
> 1 row selected (0.761 seconds)
> {code}
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