houqp commented on issue #1864: URL: https://github.com/apache/arrow-datafusion/issues/1864#issuecomment-1047235365
join is an operator that operates on two tables, but the table provider trait is an abstraction for a single table source, that's why it doesn't make sense to push down join into the scan method. join push down need to be implemented at a higher level, for example, as a custom extension plan node: https://github.com/apache/arrow-datafusion/blob/0b1bef123acc5f46f225950d13f296104a543727/datafusion/src/logical_plan/plan.rs#L362 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
