mingmwang commented on code in PR #5593:
URL: https://github.com/apache/arrow-datafusion/pull/5593#discussion_r1140362566
##########
datafusion/optimizer/src/utils.rs:
##########
@@ -291,46 +293,52 @@ pub fn find_join_exprs(
let mut joins = vec![];
let mut others = vec![];
for filter in exprs.iter() {
- let (left, op, right) = match filter {
- Expr::BinaryExpr(BinaryExpr { left, op, right }) => {
- (*left.clone(), *op, *right.clone())
- }
- _ => {
- others.push((*filter).clone());
- continue;
- }
- };
- let left = match left {
- Expr::Column(c) => c,
- _ => {
+ // If the expression contains correlated predicates, add it to join
filters
+ if filter.contains_outer() {
+ joins.push(strip_outer_reference((*filter).clone()));
+ } else {
+ // TODO remove the logic
Review Comment:
In the original decorrelation rules, there was complex logic to find out
join columns, this is unnecessary after this PR.
I will clean up the code in the next PR.
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