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https://issues.apache.org/jira/browse/ARROW-9654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17171568#comment-17171568
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Andrew Lamb commented on ARROW-9654:
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Thanks [~andygrove] -- I'll see what I can do
> [Rust][DataFusion] Add an EXPLAIN command to the datafusion CLI
> ---------------------------------------------------------------
>
> Key: ARROW-9654
> URL: https://issues.apache.org/jira/browse/ARROW-9654
> Project: Apache Arrow
> Issue Type: New Feature
> Components: Rust, Rust - DataFusion
> Reporter: Andrew Lamb
> Priority: Major
>
> In order to understand what DataFusion's planner is doing, it would be
> helpful to have an "EXPLAIN PLAN" feature. All other database systems I have
> worked with have such a feature (e.g. see
> [MySql|https://dev.mysql.com/doc/refman/8.0/en/explain-output.html]).
> I have found EXPLAIN helpful for both users but also very much developers.
> The feature would look something like
> {code}
> EXPLAIN <sql>
> {code}
> Which would then print a string with the logical plan. One way to implement
> this would simply be to use the debugging printout of the logical and
> physical plans
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