Exclude dict_id and dict_is_ordered from equality comparison of Field

arrow/src/datatypes/field.rs

@@ -15,7 +15,9 @@
 // specific language governing permissions and limitations
 // under the License.
 
+use std::cmp::Ordering;
 use std::collections::BTreeMap;
+use std::hash::{Hash, Hasher};
 
 use serde_derive::{Deserialize, Serialize};
 use serde_json::{json, Value};
@@ -27,7 +29,7 @@ use super::DataType;
 /// Contains the meta-data for a single relative type.
 ///
 /// The `Schema` object is an ordered collection of `Field` objects.
-#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
+#[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct Field {
     name: String,
     data_type: DataType,
@@ -39,6 +41,50 @@ pub struct Field {
     metadata: Option<BTreeMap<String, String>>,
 }
 
+impl PartialEq for Field {
+    fn eq(&self, other: &Self) -> bool {
+        self.name == other.name
+            && self.data_type == other.data_type
+            && self.nullable == other.nullable
+            && self.metadata == other.metadata
+    }
+}
+
+impl Eq for Field {}
+
+impl PartialOrd for Field {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for Field {
+    fn cmp(&self, other: &Self) -> Ordering {
+        let mut ord = self.name.cmp(other.name());
+        if let Ordering::Equal = ord {
+            ord = self.data_type.cmp(other.data_type());
+
+            if let Ordering::Equal = ord {
+                ord = self.nullable.cmp(&other.nullable);
+
+                if let Ordering::Equal = ord {
+                    ord = self.metadata.cmp(&other.metadata);
+                }
+            }
+        }
+        ord
+    }
+}
+
+impl Hash for Field {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.name.hash(state);
+        self.data_type.hash(state);
+        self.nullable.hash(state);
+        self.metadata.hash(state);
+    }
+}
+
 impl Field {
     /// Creates a new field
     pub fn new(name: &str, data_type: DataType, nullable: bool) -> Self {