viirya commented on code in PR #1154:
URL: https://github.com/apache/datafusion-comet/pull/1154#discussion_r1898976737
##########
native/spark-expr/src/strings.rs:
##########
@@ -141,18 +137,43 @@ make_predicate_function!(EndsWith, ends_with_dyn,
ends_with_utf8_scalar_dyn);
make_predicate_function!(Contains, contains_dyn, contains_utf8_scalar_dyn);
-#[derive(Debug, Hash)]
+#[derive(Debug, Eq)]
pub struct SubstringExpr {
pub child: Arc<dyn PhysicalExpr>,
pub start: i64,
pub len: u64,
}
-#[derive(Debug, Hash)]
+impl Hash for SubstringExpr {
+ fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+ self.child.hash(state);
+ self.start.hash(state);
+ self.len.hash(state);
+ }
+}
+
+impl PartialEq for SubstringExpr {
+ fn eq(&self, other: &Self) -> bool {
+ self.child.eq(&other.child) && self.start.eq(&other.start) &&
self.len.eq(&other.len)
+ }
+}
Review Comment:
Why we need to provide `PartialEq` implementation now?
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