alamb commented on code in PR #4755:
URL: https://github.com/apache/arrow-datafusion/pull/4755#discussion_r1058593992
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datafusion/expr/src/utils.rs:
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@@ -586,6 +586,12 @@ pub fn from_plan(
// The preceding part of expr is equi-exprs,
// and the struct of each equi-expr is like `left-expr =
right-expr`.
let new_on:Vec<(Expr,Expr)> =
expr.iter().take(equi_expr_count).map(|equi_expr| {
+ // SimplifyExpression rule may add alias to the equi_expr.
+ let equi_expr = match equi_expr {
Review Comment:
Perhaps calling `unalias` might be appropriate
https://github.com/apache/arrow-datafusion/blob/cd4fd80dd5553ffdac41e21c2b7bfe0296f30695/datafusion/optimizer/src/utils.rs#L308
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