feast-dev · soooojinlee · Feb 8, 2026 · Feb 8, 2026 · Feb 8, 2026 · Feb 8, 2026
@@ -53,6 +53,10 @@ message ValueType {
     FLOAT_SET = 27;
     BOOL_SET = 28;
     UNIX_TIMESTAMP_SET = 29;
+    UUID = 30;
+    TIME_UUID = 31;
+    UUID_LIST = 32;
+    TIME_UUID_LIST = 33;
   }
 }
 
@@ -88,6 +92,10 @@ message Value {
     FloatSet float_set_val = 27;
     BoolSet bool_set_val = 28;
     Int64Set unix_timestamp_set_val = 29;
+    string uuid_val = 30;
+    string time_uuid_val = 31;
+    StringList uuid_list_val = 32;
+    StringList time_uuid_list_val = 33;
   }
 }
 

@@ -2597,7 +2597,10 @@ def _doc_feature(x):
             online_features_response=online_features_response,
             data=requested_features_data,
         )
-        return OnlineResponse(online_features_response)
+        feature_types = {
+            f.name: f.dtype.to_value_type() for f in requested_feature_view.features
+        }
+        return OnlineResponse(online_features_response, feature_types=feature_types)
 
     def retrieve_online_documents_v2(
         self,
@@ -2881,7 +2884,8 @@ def _retrieve_from_online_store_v2(
             online_features_response.metadata.feature_names.val.extend(
                 features_to_request
             )
-            return OnlineResponse(online_features_response)
+            feature_types = {f.name: f.dtype.to_value_type() for f in table.features}
+            return OnlineResponse(online_features_response, feature_types=feature_types)
 
         table_entity_values, idxs, output_len = utils._get_unique_entities_from_values(
             entity_key_dict,
@@ -2908,7 +2912,8 @@ def _retrieve_from_online_store_v2(
             data=entity_key_dict,
         )
 
-        return OnlineResponse(online_features_response)
+        feature_types = {f.name: f.dtype.to_value_type() for f in table.features}
+        return OnlineResponse(online_features_response, feature_types=feature_types)
 
     def serve(
         self,

@@ -30,6 +30,7 @@
 from feast.protos.feast.types.Value_pb2 import Value as ValueProto
 from feast.repo_config import RepoConfig
 from feast.stream_feature_view import StreamFeatureView
+from feast.value_type import ValueType
 
 
 class OnlineStore(ABC):
@@ -218,18 +219,21 @@ def get_online_features(
                 output_len,
             )
 
+        feature_types = self._build_feature_types(grouped_refs)
+
         if requested_on_demand_feature_views:
             utils._augment_response_with_on_demand_transforms(
                 online_features_response,
                 feature_refs,
                 requested_on_demand_feature_views,
                 full_feature_names,
+                feature_types=feature_types,
             )
 
         utils._drop_unneeded_columns(
             online_features_response, requested_result_row_names
         )
-        return OnlineResponse(online_features_response)
+        return OnlineResponse(online_features_response, feature_types=feature_types)
 
     async def get_online_features_async(
         self,
@@ -318,18 +322,40 @@ async def query_table(table, requested_features):
                 output_len,
             )
 
+        feature_types = self._build_feature_types(grouped_refs)
+
         if requested_on_demand_feature_views:
             utils._augment_response_with_on_demand_transforms(
                 online_features_response,
                 feature_refs,
                 requested_on_demand_feature_views,
                 full_feature_names,
+                feature_types=feature_types,
             )
 
         utils._drop_unneeded_columns(
             online_features_response, requested_result_row_names
         )
-        return OnlineResponse(online_features_response)
+        return OnlineResponse(online_features_response, feature_types=feature_types)
+
+    @staticmethod
+    def _build_feature_types(
+        grouped_refs: List,
+    ) -> Dict[str, ValueType]:
+        """Build a mapping of feature names to ValueType from grouped feature view refs.
+
+        Includes both bare names and prefixed names (feature_view__feature) so that
+        lookups succeed regardless of the full_feature_names setting.
+        """
+        feature_types: Dict[str, ValueType] = {}
+        for table, requested_features in grouped_refs:
+            table_name = table.projection.name_to_use()
+            for field in table.features:
+                if field.name in requested_features:
+                    vtype = field.dtype.to_value_type()
+                    feature_types[field.name] = vtype
+                    feature_types[f"{table_name}__{field.name}"] = vtype
+        return feature_types
 
     @abstractmethod
     def update(

@@ -1,5 +1,6 @@
 import copy
 import functools
+import uuid
 import warnings
 from types import FunctionType
 from typing import Any, List, Optional, Union, cast
@@ -1093,6 +1094,9 @@ def _get_sample_values_by_type(self) -> dict[ValueType, list[Any]]:
             # Special binary types
             ValueType.PDF_BYTES: [pdf_sample],
             ValueType.IMAGE_BYTES: [image_sample],
+            # UUID types
+            ValueType.UUID: [uuid.uuid4()],
+            ValueType.TIME_UUID: [uuid.uuid1()],
             # List types
             ValueType.BYTES_LIST: [[b"hello world"]],
             ValueType.STRING_LIST: [["hello world"]],
@@ -1102,6 +1106,8 @@ def _get_sample_values_by_type(self) -> dict[ValueType, list[Any]]:
             ValueType.FLOAT_LIST: [[1.0]],
             ValueType.BOOL_LIST: [[True]],
             ValueType.UNIX_TIMESTAMP_LIST: [[_utc_now()]],
+            ValueType.UUID_LIST: [[uuid.uuid4(), uuid.uuid4()]],
+            ValueType.TIME_UUID_LIST: [[uuid.uuid1(), uuid.uuid1()]],
         }
 
     @staticmethod

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import TYPE_CHECKING, Any, Dict, List, TypeAlias, Union
+from typing import TYPE_CHECKING, Any, Dict, List, Optional, TypeAlias, Union
 
 import pandas as pd
 import pyarrow as pa
@@ -21,6 +21,7 @@
 from feast.protos.feast.serving.ServingService_pb2 import GetOnlineFeaturesResponse
 from feast.torch_wrapper import get_torch
 from feast.type_map import feast_value_type_to_python_type
+from feast.value_type import ValueType
 
 if TYPE_CHECKING:
     import torch
@@ -37,14 +38,20 @@ class OnlineResponse:
     Defines an online response in feast.
     """
 
-    def __init__(self, online_response_proto: GetOnlineFeaturesResponse):
+    def __init__(
+        self,
+        online_response_proto: GetOnlineFeaturesResponse,
+        feature_types: Optional[Dict[str, ValueType]] = None,
+    ):
         """
         Construct a native online response from its protobuf version.
 
         Args:
         online_response_proto: GetOnlineResponse proto object to construct from.
+        feature_types: Optional mapping of feature names to ValueType for type-aware deserialization.
         """
         self.proto = online_response_proto
+        self._feature_types = feature_types or {}
         # Delete DUMMY_ENTITY_ID from proto if it exists
         for idx, val in enumerate(self.proto.metadata.feature_names.val):
             if val == DUMMY_ENTITY_ID:
@@ -65,8 +72,10 @@ def to_dict(self, include_event_timestamps: bool = False) -> Dict[str, Any]:
         for feature_ref, feature_vector in zip(
             self.proto.metadata.feature_names.val, self.proto.results
         ):
+            feature_type = self._feature_types.get(feature_ref)
             response[feature_ref] = [
-                feast_value_type_to_python_type(v) for v in feature_vector.values
+                feast_value_type_to_python_type(v, feature_type)
+                for v in feature_vector.values
             ]
 
             if include_event_timestamps:

@@ -1,19 +1,19 @@
 """
 @generated by mypy-protobuf.  Do not edit manually!
 isort:skip_file
-
-* Copyright 2021 The Feast Authors
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*     https://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
+
+* Copyright 2021 The Feast Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
 * limitations under the License.
 """
 import builtins

@@ -1,19 +1,19 @@
 """
 @generated by mypy-protobuf.  Do not edit manually!
 isort:skip_file
-
-* Copyright 2020 The Feast Authors
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*     https://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
+
+* Copyright 2020 The Feast Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
 * limitations under the License.
 """
 import builtins

@@ -19,7 +19,7 @@ else:
 DESCRIPTOR: google.protobuf.descriptor.FileDescriptor
 
 class FeatureViewProjection(google.protobuf.message.Message):
-    """A projection to be applied on top of a FeatureView. 
+    """A projection to be applied on top of a FeatureView. 
     Contains the modifications to a FeatureView such as the features subset to use.
     """
 

@@ -1,19 +1,19 @@
 """
 @generated by mypy-protobuf.  Do not edit manually!
 isort:skip_file
-
-* Copyright 2020 The Feast Authors
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*     https://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
+
+* Copyright 2020 The Feast Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
 * limitations under the License.
 """
 import builtins

@@ -1,19 +1,19 @@
 """
 @generated by mypy-protobuf.  Do not edit manually!
 isort:skip_file
-
-* Copyright 2020 The Feast Authors
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*     https://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
+
+* Copyright 2020 The Feast Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
 * limitations under the License.
 """
 import builtins