jonahgao commented on code in PR #7909:
URL: https://github.com/apache/arrow-datafusion/pull/7909#discussion_r1369762989
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datafusion/optimizer/src/push_down_filter.rs:
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@@ -881,6 +910,42 @@ pub fn replace_cols_by_name(
})
}
+/// check whether the expression is volatile predicates
+pub fn is_volatile_expression(e: Expr) -> bool {
Review Comment:
```suggestion
fn is_volatile_expression(e: &Expr) -> bool {
```
- We can pass the argument `e` by reference.
- I would suggest setting the visibility of this function to `private` since
it is only being used within this file.
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