alamb opened a new issue, #19816: URL: https://github.com/apache/datafusion/issues/19816
### Is your feature request related to a problem or challenge? - Broken out of https://github.com/apache/datafusion/issues/15558 from @irenjj I believe the CMU [optd](https://db.cs.cmu.edu/projects/optd/) project is trying to plan multi-level correlated subqueries (specifically @yliang412 👋 ) ```sql CREATE TABLE employees ( employee_id INTEGER, employee_name VARCHAR, dept_id INTEGER, salary DECIMAL ); CREATE TABLE project_assignments ( project_id INTEGER, employee_id INTEGER, priority INTEGER ); ``` Current running this query fails ```sql SELECT e1.employee_name, e1.salary FROM employees e1 WHERE e1.salary > ( SELECT AVG(e2.salary) FROM employees e2 WHERE e2.dept_id = e1.dept_id AND e2.salary > ( SELECT AVG(e3.salary) FROM employees e3 WHERE e3.dept_id = e1.dept_id ) ); ``` ``` Schema error: No field named e1.dept_id. Did you mean 'e3.dept_id'?. ``` Feedback from @yliang412 : > I believe it couldn't find the e1.dept_id. Even without unnesting, the planner should still correctly infer that `e1.dept_id` is from the employees table in the top-level scope. I suspect it has something to do with resolving the OuterReferenceColumn when it is not from the immediate outer scope. ### Describe the solution you'd like We would like DataFusion to at least **Bind** the query correctly (aka in DataFusion terms, have `SqlToRel` successfully create a LogicalPlan) Not that successfully executing the query and getting the correct answer likely requires more unnesting rules which we don't yet have. This ticket just focus on the logical planning of the query and this ticket covers actually executing it: - https://github.com/apache/datafusion/issues/15558 covers t ### Describe alternatives you've considered @duongcongtoai looks like they had a PR from a while ago to resolve this problem - https://github.com/apache/datafusion/pull/18806 ### Additional context _No response_ -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
