alamb commented on code in PR #2471:
URL: https://github.com/apache/arrow-datafusion/pull/2471#discussion_r867025445
##########
datafusion/expr/src/expr.rs:
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@@ -251,77 +251,6 @@ pub enum Expr {
QualifiedWildcard { qualifier: String },
}
-/// Recursively find all columns referenced by an expression
-pub fn find_columns_referenced_by_expr(e: &Expr) -> Vec<Column> {
Review Comment:
it is less code, but it also avoids potential issues in missing a sub expr
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