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https://issues.apache.org/jira/browse/ARROW-11058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Grove resolved ARROW-11058.
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Resolution: Fixed
Issue resolved by pull request 9043
[https://github.com/apache/arrow/pull/9043]
> [Rust] [DataFusion] Implement "coalesce batches" operator
> ---------------------------------------------------------
>
> Key: ARROW-11058
> URL: https://issues.apache.org/jira/browse/ARROW-11058
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Rust - DataFusion
> Reporter: Andy Grove
> Assignee: Andy Grove
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.0.0
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> When we have a FilterExec in the plan, it can produce lots of small batches
> and we therefore lose efficiency of vectorized operations.
> We should implement a new CoalesceBatchExec and wrap every FilterExec with
> one of these so that small batches can be recombined into larger batches to
> improve the efficiency of upstream operators.
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