isidentical commented on code in PR #3969:
URL: https://github.com/apache/arrow-datafusion/pull/3969#discussion_r1008265133
##########
datafusion/physical-expr/src/expressions/cast.rs:
##########
@@ -93,6 +94,36 @@ impl PhysicalExpr for CastExpr {
let value = self.expr.evaluate(batch)?;
cast_column(&value, &self.cast_type, &self.cast_options)
}
+
+ fn children(&self) -> Vec<Arc<dyn PhysicalExpr>> {
+ vec![self.expr.clone()]
+ }
+
+ fn with_new_children(
+ self: Arc<Self>,
+ children: Vec<Arc<dyn PhysicalExpr>>,
+ ) -> Result<Arc<dyn PhysicalExpr>> {
+ Ok(Arc::new(CastExpr::new(
+ children[0].clone(),
+ self.cast_type.clone(),
+ CastOptions {
+ safe: self.cast_options.safe,
+ },
+ )))
+ }
+}
+
+impl PartialEq<dyn Any> for CastExpr {
+ fn eq(&self, other: &dyn Any) -> bool {
+ down_cast_any_ref(other)
+ .downcast_ref::<Self>()
+ .map(|x| {
+ self.expr.eq(&x.expr)
+ && self.cast_type == x.cast_type
+ && self.cast_options.safe == x.cast_options.safe
Review Comment:
This seems to be a bit error-prone, considering that `cast_options` might
get new members and this part will not count them. Can we consider adding
equality comparison support to `CastOptions` directly?
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