Dandandan commented on issue #3214: URL: https://github.com/apache/arrow-datafusion/issues/3214#issuecomment-1229871169
> I find this comment: https://github.com/apache/arrow-datafusion/blob/master/datafusion/optimizer/src/projection_push_down.rs#L98-L100 > > It says that `Ensure that we are reading at least one column from the table`. Is there any reason or background of why we need to do this? The reason is that several Arrow readers don´t support empty projections. I added a PR for csv / json upstream https://github.com/apache/arrow-rs/pull/2604 -- 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]
