jackwener commented on code in PR #4487:
URL: https://github.com/apache/arrow-datafusion/pull/4487#discussion_r1040279935
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datafusion/optimizer/src/push_down_projection.rs:
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@@ -94,23 +94,19 @@ fn optimize_plan(
let mut new_expr = Vec::new();
let mut new_fields = Vec::new();
+ let mut new_required_columns = HashSet::new();
Review Comment:
👍Yes, I have added comment to explain it.
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