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https://issues.apache.org/jira/browse/DRILL-1846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14245066#comment-14245066
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Jacques Nadeau commented on DRILL-1846:
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Looks good. +1
> Re-ordering output of a subquery on a different column causes error
> -------------------------------------------------------------------
>
> Key: DRILL-1846
> URL: https://issues.apache.org/jira/browse/DRILL-1846
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Aman Sinha
> Assignee: Aman Sinha
> Attachments:
> 0001-DRILL-1846-Use-max-receiver-width-during-stats-colle.patch
>
>
> In the following the subquery does an order by on n_regionkey and the outer
> query does another order-by on n_nationkey. I have to set the slice_target =
> 1 for this particular data set but for the general case it is not needed.
> This query errors out:
> {code}
> alter session set `planner.slice_target` = 1
> select n.n_nationkey
> from (select n_nationkey, n_regionkey from cp.`tpch/nation.parquet`
> order by n_regionkey) n
> order by n.n_nationkey;
> Query failed: Query failed: Unexpected exception during fragment
> initialization: SingleMergeExchange only supports a single receiver endpoint
> {code}
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