comphead commented on code in PR #18869:
URL: https://github.com/apache/datafusion/pull/18869#discussion_r2558347202
##########
datafusion/expr/src/expr_schema.rs:
##########
@@ -58,6 +58,10 @@ pub trait ExprSchemable {
fn cast_to(self, cast_to_type: &DataType, schema: &dyn ExprSchema) ->
Result<Expr>;
/// Given a schema, return the type and nullability of the expr
+ #[deprecated(
+ since = "51.0.0",
+ note = "Use `to_field().1.is_nullable` and `to_field().1.data_type()`
directly instead"
Review Comment:
probably we can name params in future to get more meaning for `to_field().1`
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