mustafasrepo commented on code in PR #9874:
URL: https://github.com/apache/arrow-datafusion/pull/9874#discussion_r1546116470


##########
datafusion/core/src/execution/context/mod.rs:
##########
@@ -1457,6 +1461,22 @@ impl SessionState {
         datafusion_functions_array::register_all(&mut new_self)
             .expect("can not register array expressions");
 
+        let first_value = create_first_value(
+            "FIRST_VALUE",
+            Signature::uniform(1, NUMERICS.to_vec(), Volatility::Immutable),
+            Arc::new(create_first_value_accumulator),
+        );
+
+        match new_self.register_udaf(Arc::new(first_value)) {
+            Ok(Some(existing_udaf)) => {
+                debug!("Overwrite existing UDF: {}", existing_udaf.name());

Review Comment:
   ```suggestion
                   debug!("Overwrite existing UDAF: {}", existing_udaf.name());
   ```



##########
datafusion/core/src/execution/context/mod.rs:
##########
@@ -1457,6 +1461,22 @@ impl SessionState {
         datafusion_functions_array::register_all(&mut new_self)
             .expect("can not register array expressions");
 
+        let first_value = create_first_value(
+            "FIRST_VALUE",
+            Signature::uniform(1, NUMERICS.to_vec(), Volatility::Immutable),
+            Arc::new(create_first_value_accumulator),
+        );
+
+        match new_self.register_udaf(Arc::new(first_value)) {
+            Ok(Some(existing_udaf)) => {
+                debug!("Overwrite existing UDF: {}", existing_udaf.name());
+            }
+            Ok(None) => {}
+            Err(err) => {
+                panic!("Failed to register UDF: {}", err);

Review Comment:
   ```suggestion
                   panic!("Failed to register UDAF: {}", err);
   ```



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