[jira] [Updated] (ARROW-11029) [Rust] [DataFusion] Document why join order optimization does not work with filter pushdown

["Andy Grove (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-11029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Grove updated ARROW-11029:
-------------------------------
    Summary: [Rust] [DataFusion] Document why join order optimization does not work with filter pushdown  (was: [Rust] [DataFusion] Join order optimization does not work with filter pushdown)

> [Rust] [DataFusion] Document why join order optimization does not work with filter pushdown
> -------------------------------------------------------------------------------------------
>
>                 Key: ARROW-11029
>                 URL: https://issues.apache.org/jira/browse/ARROW-11029
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Rust - DataFusion
>            Reporter: Andy Grove
>            Assignee: Andy Grove
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.0.0
>
>          Time Spent: 2.5h
>  Remaining Estimate: 0h
>
> When I run TPC-H query 12, I see that the join order is not optimized to put the smaller table on the left. I added some debug logging and see that the optimization sees row count of None on the left side because there is a filter wrapping the table scan.



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