Modify docstring to indicate message.DecodeError when proto parsing failed

Author: trollyxia

google/cloud/bigtable/data/_async/client.py

@@ -728,7 +728,7 @@ async def execute_query(
                     }
 
                 If ``column_info`` is not provided, or if a specific column name is not found
-                in the dictionary, or if deserialization fails:
+                in the dictionary:
 
                     - PROTO columns will be returned as raw bytes.
                     - ENUM columns will be returned as integers.
@@ -773,6 +773,7 @@ async def execute_query(
             google.api_core.exceptions.GoogleAPIError: raised if the request encounters an unrecoverable error
             google.cloud.bigtable.data.exceptions.ParameterTypeInferenceFailed: Raised if
                 a parameter is passed without an explicit type, and the type cannot be infered
+            google.protobuf.message.DecodeError: raised if the deserialization of a PROTO/ENUM value fails.
         """
         instance_name = self._gapic_client.instance_path(self.project, instance_id)
         converted_param_types = _to_param_types(parameters, parameter_types)

google/cloud/bigtable/data/_sync_autogen/client.py

@@ -555,7 +555,7 @@ def execute_query(
                     }
 
                 If ``column_info`` is not provided, or if a specific column name is not found
-                in the dictionary, or if deserialization fails:
+                in the dictionary:
 
                     - PROTO columns will be returned as raw bytes.
                     - ENUM columns will be returned as integers.
@@ -600,6 +600,7 @@ def execute_query(
             google.api_core.exceptions.GoogleAPIError: raised if the request encounters an unrecoverable error
             google.cloud.bigtable.data.exceptions.ParameterTypeInferenceFailed: Raised if
                 a parameter is passed without an explicit type, and the type cannot be infered
+            google.protobuf.message.DecodeError: raised if the deserialization of a PROTO/ENUM value fails.
         """
         instance_name = self._gapic_client.instance_path(self.project, instance_id)
         converted_param_types = _to_param_types(parameters, parameter_types)

google/cloud/bigtable/data/execute_query/_query_result_parsing_utils.py

@@ -165,10 +165,13 @@ def _parse_proto_type(
 
     Returns:
         A deserialized Protobuf Message object if parsing is successful.
-        If parsing fails for any reason, or if the required type information
-        is not found in column_info, the function returns the original
-        serialized data as bytes (value.bytes_value). This fallback
-        ensures that the raw data is still accessible.
+        If the required type information is not found in column_info, the function
+        returns the original serialized data as bytes (value.bytes_value).
+        This fallback ensures that the raw data is still accessible.
+
+    Raises:
+        google.protobuf.message.DecodeError: If `value.bytes_value` cannot be
+            parsed as the Message type specified in `column_info`.
     """
     if (
         column_name is not None