andygrove commented on issue #2181: URL: https://github.com/apache/arrow-datafusion/issues/2181#issuecomment-1100453335
> that being said, I think we can get very far in DataFusion (maybe forever) by handling only uncorrelated and equi-join correlated subqueries and avoid LogicalPlan in Expr For dask-sql, I have a requirement to support a popular decision support SQL benchmark that has correlated subqueries that are not all equi-join. Even if we were just looking to support equi-join, I would expect to build a simple logical plan first and then have an opti,mizer rule re-write the plan to a SEMI-JOIN or ANTI-JOIN. I don't think it would be feasible to try and do this while translating a SQL AST to a logical plan before the entire query is built. -- 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]
