Dandandan commented on a change in pull request #55: URL: https://github.com/apache/arrow-datafusion/pull/55#discussion_r619792456
########## File path: datafusion/src/execution/dataframe_impl.rs ########## @@ -252,7 +252,12 @@ mod tests { let right = test_table()?.select_columns(&["c1", "c3"])?; let left_rows = left.collect().await?; let right_rows = right.collect().await?; - let join = left.join(right, JoinType::Inner, &["c1"], &["c1"])?; + let join = left.join( + right, + JoinType::Inner, + vec![Column::from_name("c1".to_string())], Review comment: I think it might be useful to keep supporting the string syntax to keep the dataframe api simple, but also support qualified names. Maybe the API could be used `column: Vec<Into<Column>>` and includes an implementation for `&str`? -- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org