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Posted to jira@arrow.apache.org by "Andrew Lamb (Jira)" <ji...@apache.org> on 2020/08/31 11:15:00 UTC

[jira] [Updated] (ARROW-9838) [Rust] [DataFusion] DefaultPhysicalPlanner should insert explicit MergeExec nodes

     [ https://issues.apache.org/jira/browse/ARROW-9838?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Lamb updated ARROW-9838:
-------------------------------
    Summary: [Rust] [DataFusion] DefaultPhysicalPlanner should insert explicit MergeExec nodes  (was: [Rust] [DataFusion] Physical planner should insert explicit MergeExec nodes)

> [Rust] [DataFusion] DefaultPhysicalPlanner should insert explicit MergeExec nodes
> ---------------------------------------------------------------------------------
>
>                 Key: ARROW-9838
>                 URL: https://issues.apache.org/jira/browse/ARROW-9838
>             Project: Apache Arrow
>          Issue Type: Sub-task
>          Components: Rust, Rust - DataFusion
>            Reporter: Andy Grove
>            Assignee: Andy Grove
>            Priority: Major
>             Fix For: 2.0.0
>
>
> Operators such as GlobalLimitExec, SortExec, and HashAggregateExec (in some cases) require a single input partition. Rather than have these operators perform their own merging of input partitions, the planner should insert explicit MergeExec nodes into the physical plan, when needed.
>  



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