alamb commented on issue #1014: URL: https://github.com/apache/arrow-datafusion/issues/1014#issuecomment-921937062
> For the CSE use case, it would be nice if we can compare and arrange Exprs in some kinds of order. By doing that we can recognize a+b and b+a are the same expression. And I think it can help other things too. That is a good point @waynexia -- I think one common approach is typically called "normalization" (aka rewrite all expressions so logically equivalent expressions like `a+b` and `b+a` end up with the same actual `Expr` form. -- 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]
