jayzhan211 commented on code in PR #9304:
URL: https://github.com/apache/arrow-datafusion/pull/9304#discussion_r1510117090
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datafusion/expr/src/simplify.rs:
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@@ -41,40 +41,12 @@ pub trait SimplifyInfo {
/// Returns data type of this expr needed for determining optimized int
type of a value
fn get_data_type(&self, expr: &Expr) -> Result<DataType>;
+
+ /// Return the schema for function simplifier
Review Comment:
Any reason why we should avoid return schema? Like `cast_to` is the function
that require schema, it's possible that there are other functions with similar
requirements.
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