jonahgao commented on issue #13092: URL: https://github.com/apache/datafusion/issues/13092#issuecomment-2436690476
I think we can check if the number of columns is the same when [building](https://github.com/apache/datafusion/blob/232293367d6f3ff10e291597e1dc45bcce7de7d7/datafusion/expr/src/logical_plan/builder.rs#L1480) Unions, as it is a common scenario and does not depend on wildcard expansion and type coercion. ```rust pub fn union(left_plan: LogicalPlan, right_plan: LogicalPlan) -> Result<LogicalPlan> { if left_plan.schema().fields().len() != right_plan.schema().fields().len() { return plan_err!( "UNION queries have different number of columns: \ left has {} columns whereas right has {} columns", left_plan.schema().fields().len(), right_plan.schema().fields().len() ); } ``` -- 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: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
