diff --git a/testproxypb/test_proxy.pb.go b/testproxypb/test_proxy.pb.go
index 84a14831..5a527b2c 100644
--- a/testproxypb/test_proxy.pb.go
+++ b/testproxypb/test_proxy.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -14,8 +14,8 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.36.3
-// 	protoc        v5.27.3
+// 	protoc-gen-go v1.36.9
+// 	protoc        v6.32.0
 // source: test_proxy.proto
 
 package testproxypb
@@ -26,9 +26,11 @@ import (
 	status "google.golang.org/genproto/googleapis/rpc/status"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	descriptorpb "google.golang.org/protobuf/types/descriptorpb"
 	durationpb "google.golang.org/protobuf/types/known/durationpb"
 	reflect "reflect"
 	sync "sync"
+	unsafe "unsafe"
 )
 
 const (
@@ -1160,9 +1162,13 @@ type ExecuteQueryRequest struct {
 	// The ID of the target client object.
 	ClientId string `protobuf:"bytes,1,opt,name=client_id,json=clientId,proto3" json:"client_id,omitempty"`
 	// The raw request to the Bigtable server.
-	Request       *bigtablepb.ExecuteQueryRequest `protobuf:"bytes,2,opt,name=request,proto3" json:"request,omitempty"`
-	unknownFields protoimpl.UnknownFields
-	sizeCache     protoimpl.SizeCache
+	Request *bigtablepb.ExecuteQueryRequest `protobuf:"bytes,2,opt,name=request,proto3" json:"request,omitempty"`
+	// A collection of proto descriptor files for deserializing PROTO/ENUM columns
+	// in the query result. The descriptor files must be provided in dependency
+	// order.
+	FileDescriptorSet *descriptorpb.FileDescriptorSet `protobuf:"bytes,3,opt,name=file_descriptor_set,json=fileDescriptorSet,proto3" json:"file_descriptor_set,omitempty"`
+	unknownFields     protoimpl.UnknownFields
+	sizeCache         protoimpl.SizeCache
 }
 
 func (x *ExecuteQueryRequest) Reset() {
@@ -1209,6 +1215,13 @@ func (x *ExecuteQueryRequest) GetRequest() *bigtablepb.ExecuteQueryRequest {
 	return nil
 }
 
+func (x *ExecuteQueryRequest) GetFileDescriptorSet() *descriptorpb.FileDescriptorSet {
+	if x != nil {
+		return x.FileDescriptorSet
+	}
+	return nil
+}
+
 // Response from test proxy service for ExecuteQueryRequest.
 type ExecuteQueryResult struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
@@ -1446,306 +1459,114 @@ func (x *CreateClientRequest_SecurityOptions) GetSslRootCertsPem() string {
 
 var File_test_proxy_proto protoreflect.FileDescriptor
 
-var file_test_proxy_proto_rawDesc = []byte{
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-}
+const file_test_proxy_proto_rawDesc = "" +
+	"\n" +
+	"\x10test_proxy.proto\x12\x19google.bigtable.testproxy\x1a\x17google/api/client.proto\x1a!google/bigtable/v2/bigtable.proto\x1a\x1dgoogle/bigtable/v2/data.proto\x1a google/protobuf/descriptor.proto\x1a\x1egoogle/protobuf/duration.proto\x1a\x17google/rpc/status.proto\"\x8e\x05\n" +
+	"\x13CreateClientRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12\x1f\n" +
+	"\vdata_target\x18\x02 \x01(\tR\n" +
+	"dataTarget\x12\x1d\n" +
+	"\n" +
+	"project_id\x18\x03 \x01(\tR\tprojectId\x12\x1f\n" +
+	"\vinstance_id\x18\x04 \x01(\tR\n" +
+	"instanceId\x12$\n" +
+	"\x0eapp_profile_id\x18\x05 \x01(\tR\fappProfileId\x12M\n" +
+	"\x15per_operation_timeout\x18\x06 \x01(\v2\x19.google.protobuf.DurationR\x13perOperationTimeout\x12h\n" +
+	"\x17optional_feature_config\x18\a \x01(\x0e20.google.bigtable.testproxy.OptionalFeatureConfigR\x15optionalFeatureConfig\x12i\n" +
+	"\x10security_options\x18\b \x01(\v2>.google.bigtable.testproxy.CreateClientRequest.SecurityOptionsR\x0fsecurityOptions\x1a\xae\x01\n" +
+	"\x0fSecurityOptions\x12!\n" +
+	"\faccess_token\x18\x01 \x01(\tR\vaccessToken\x12\x17\n" +
+	"\ause_ssl\x18\x02 \x01(\bR\x06useSsl\x122\n" +
+	"\x15ssl_endpoint_override\x18\x03 \x01(\tR\x13sslEndpointOverride\x12+\n" +
+	"\x12ssl_root_certs_pem\x18\x04 \x01(\tR\x0fsslRootCertsPem\"\x16\n" +
+	"\x14CreateClientResponse\"1\n" +
+	"\x12CloseClientRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\"\x15\n" +
+	"\x13CloseClientResponse\"2\n" +
+	"\x13RemoveClientRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\"\x16\n" +
+	"\x14RemoveClientResponse\"\x9c\x01\n" +
+	"\x0eReadRowRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12\x1d\n" +
+	"\n" +
+	"table_name\x18\x04 \x01(\tR\ttableName\x12\x17\n" +
+	"\arow_key\x18\x02 \x01(\tR\x06rowKey\x125\n" +
+	"\x06filter\x18\x03 \x01(\v2\x1d.google.bigtable.v2.RowFilterR\x06filter\"b\n" +
+	"\tRowResult\x12*\n" +
+	"\x06status\x18\x01 \x01(\v2\x12.google.rpc.StatusR\x06status\x12)\n" +
+	"\x03row\x18\x02 \x01(\v2\x17.google.bigtable.v2.RowR\x03row\"\x99\x01\n" +
+	"\x0fReadRowsRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12=\n" +
+	"\arequest\x18\x02 \x01(\v2#.google.bigtable.v2.ReadRowsRequestR\arequest\x12*\n" +
+	"\x11cancel_after_rows\x18\x03 \x01(\x05R\x0fcancelAfterRows\"e\n" +
+	"\n" +
+	"RowsResult\x12*\n" +
+	"\x06status\x18\x01 \x01(\v2\x12.google.rpc.StatusR\x06status\x12+\n" +
+	"\x04rows\x18\x02 \x03(\v2\x17.google.bigtable.v2.RowR\x04rows\"o\n" +
+	"\x10MutateRowRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12>\n" +
+	"\arequest\x18\x02 \x01(\v2$.google.bigtable.v2.MutateRowRequestR\arequest\"=\n" +
+	"\x0fMutateRowResult\x12*\n" +
+	"\x06status\x18\x01 \x01(\v2\x12.google.rpc.StatusR\x06status\"q\n" +
+	"\x11MutateRowsRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12?\n" +
+	"\arequest\x18\x02 \x01(\v2%.google.bigtable.v2.MutateRowsRequestR\arequest\"\x86\x01\n" +
+	"\x10MutateRowsResult\x12*\n" +
+	"\x06status\x18\x01 \x01(\v2\x12.google.rpc.StatusR\x06status\x12F\n" +
+	"\aentries\x18\x02 \x03(\v2,.google.bigtable.v2.MutateRowsResponse.EntryR\aentries\"\x7f\n" +
+	"\x18CheckAndMutateRowRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12F\n" +
+	"\arequest\x18\x02 \x01(\v2,.google.bigtable.v2.CheckAndMutateRowRequestR\arequest\"\x8c\x01\n" +
+	"\x17CheckAndMutateRowResult\x12*\n" +
+	"\x06status\x18\x01 \x01(\v2\x12.google.rpc.StatusR\x06status\x12E\n" +
+	"\x06result\x18\x02 \x01(\v2-.google.bigtable.v2.CheckAndMutateRowResponseR\x06result\"w\n" +
+	"\x14SampleRowKeysRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12B\n" +
+	"\arequest\x18\x02 \x01(\v2(.google.bigtable.v2.SampleRowKeysRequestR\arequest\"\x86\x01\n" +
+	"\x13SampleRowKeysResult\x12*\n" +
+	"\x06status\x18\x01 \x01(\v2\x12.google.rpc.StatusR\x06status\x12C\n" +
+	"\asamples\x18\x02 \x03(\v2).google.bigtable.v2.SampleRowKeysResponseR\asamples\"\x81\x01\n" +
+	"\x19ReadModifyWriteRowRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12G\n" +
+	"\arequest\x18\x02 \x01(\v2-.google.bigtable.v2.ReadModifyWriteRowRequestR\arequest\"\xc9\x01\n" +
+	"\x13ExecuteQueryRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\tR\bclientId\x12A\n" +
+	"\arequest\x18\x02 \x01(\v2'.google.bigtable.v2.ExecuteQueryRequestR\arequest\x12R\n" +
+	"\x13file_descriptor_set\x18\x03 \x01(\v2\".google.protobuf.FileDescriptorSetR\x11fileDescriptorSet\"\xc1\x01\n" +
+	"\x12ExecuteQueryResult\x12*\n" +
+	"\x06status\x18\x01 \x01(\v2\x12.google.rpc.StatusR\x06status\x12H\n" +
+	"\bmetadata\x18\x04 \x01(\v2,.google.bigtable.testproxy.ResultSetMetadataR\bmetadata\x125\n" +
+	"\x04rows\x18\x03 \x03(\v2!.google.bigtable.testproxy.SqlRowR\x04rows\"Q\n" +
+	"\x11ResultSetMetadata\x12<\n" +
+	"\acolumns\x18\x01 \x03(\v2\".google.bigtable.v2.ColumnMetadataR\acolumns\";\n" +
+	"\x06SqlRow\x121\n" +
+	"\x06values\x18\x01 \x03(\v2\x19.google.bigtable.v2.ValueR\x06values*d\n" +
+	"\x15OptionalFeatureConfig\x12#\n" +
+	"\x1fOPTIONAL_FEATURE_CONFIG_DEFAULT\x10\x00\x12&\n" +
+	"\"OPTIONAL_FEATURE_CONFIG_ENABLE_ALL\x10\x012\x95\n" +
+	"\n" +
+	"\x18CloudBigtableV2TestProxy\x12q\n" +
+	"\fCreateClient\x12..google.bigtable.testproxy.CreateClientRequest\x1a/.google.bigtable.testproxy.CreateClientResponse\"\x00\x12n\n" +
+	"\vCloseClient\x12-.google.bigtable.testproxy.CloseClientRequest\x1a..google.bigtable.testproxy.CloseClientResponse\"\x00\x12q\n" +
+	"\fRemoveClient\x12..google.bigtable.testproxy.RemoveClientRequest\x1a/.google.bigtable.testproxy.RemoveClientResponse\"\x00\x12\\\n" +
+	"\aReadRow\x12).google.bigtable.testproxy.ReadRowRequest\x1a$.google.bigtable.testproxy.RowResult\"\x00\x12_\n" +
+	"\bReadRows\x12*.google.bigtable.testproxy.ReadRowsRequest\x1a%.google.bigtable.testproxy.RowsResult\"\x00\x12f\n" +
+	"\tMutateRow\x12+.google.bigtable.testproxy.MutateRowRequest\x1a*.google.bigtable.testproxy.MutateRowResult\"\x00\x12m\n" +
+	"\x0eBulkMutateRows\x12,.google.bigtable.testproxy.MutateRowsRequest\x1a+.google.bigtable.testproxy.MutateRowsResult\"\x00\x12~\n" +
+	"\x11CheckAndMutateRow\x123.google.bigtable.testproxy.CheckAndMutateRowRequest\x1a2.google.bigtable.testproxy.CheckAndMutateRowResult\"\x00\x12r\n" +
+	"\rSampleRowKeys\x12/.google.bigtable.testproxy.SampleRowKeysRequest\x1a..google.bigtable.testproxy.SampleRowKeysResult\"\x00\x12r\n" +
+	"\x12ReadModifyWriteRow\x124.google.bigtable.testproxy.ReadModifyWriteRowRequest\x1a$.google.bigtable.testproxy.RowResult\"\x00\x12o\n" +
+	"\fExecuteQuery\x12..google.bigtable.testproxy.ExecuteQueryRequest\x1a-.google.bigtable.testproxy.ExecuteQueryResult\"\x00\x1a4\xcaA1bigtable-test-proxy-not-accessible.googleapis.comBg\n" +
+	"#com.google.cloud.bigtable.testproxyP\x01Z>cloud.google.com/go/bigtable/testproxy/testproxypb;testproxypbb\x06proto3"
 
 var (
 	file_test_proxy_proto_rawDescOnce sync.Once
-	file_test_proxy_proto_rawDescData = file_test_proxy_proto_rawDesc
+	file_test_proxy_proto_rawDescData []byte
 )
 
 func file_test_proxy_proto_rawDescGZIP() []byte {
 	file_test_proxy_proto_rawDescOnce.Do(func() {
-		file_test_proxy_proto_rawDescData = protoimpl.X.CompressGZIP(file_test_proxy_proto_rawDescData)
+		file_test_proxy_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_test_proxy_proto_rawDesc), len(file_test_proxy_proto_rawDesc)))
 	})
 	return file_test_proxy_proto_rawDescData
 }
@@ -1792,8 +1613,9 @@ var file_test_proxy_proto_goTypes = []any{
 	(*bigtablepb.SampleRowKeysResponse)(nil),     // 36: google.bigtable.v2.SampleRowKeysResponse
 	(*bigtablepb.ReadModifyWriteRowRequest)(nil), // 37: google.bigtable.v2.ReadModifyWriteRowRequest
 	(*bigtablepb.ExecuteQueryRequest)(nil),       // 38: google.bigtable.v2.ExecuteQueryRequest
-	(*bigtablepb.ColumnMetadata)(nil),            // 39: google.bigtable.v2.ColumnMetadata
-	(*bigtablepb.Value)(nil),                     // 40: google.bigtable.v2.Value
+	(*descriptorpb.FileDescriptorSet)(nil),       // 39: google.protobuf.FileDescriptorSet
+	(*bigtablepb.ColumnMetadata)(nil),            // 40: google.bigtable.v2.ColumnMetadata
+	(*bigtablepb.Value)(nil),                     // 41: google.bigtable.v2.Value
 }
 var file_test_proxy_proto_depIdxs = []int32{
 	25, // 0: google.bigtable.testproxy.CreateClientRequest.per_operation_timeout:type_name -> google.protobuf.Duration
@@ -1818,38 +1640,39 @@ var file_test_proxy_proto_depIdxs = []int32{
 	36, // 19: google.bigtable.testproxy.SampleRowKeysResult.samples:type_name -> google.bigtable.v2.SampleRowKeysResponse
 	37, // 20: google.bigtable.testproxy.ReadModifyWriteRowRequest.request:type_name -> google.bigtable.v2.ReadModifyWriteRowRequest
 	38, // 21: google.bigtable.testproxy.ExecuteQueryRequest.request:type_name -> google.bigtable.v2.ExecuteQueryRequest
-	27, // 22: google.bigtable.testproxy.ExecuteQueryResult.status:type_name -> google.rpc.Status
-	22, // 23: google.bigtable.testproxy.ExecuteQueryResult.metadata:type_name -> google.bigtable.testproxy.ResultSetMetadata
-	23, // 24: google.bigtable.testproxy.ExecuteQueryResult.rows:type_name -> google.bigtable.testproxy.SqlRow
-	39, // 25: google.bigtable.testproxy.ResultSetMetadata.columns:type_name -> google.bigtable.v2.ColumnMetadata
-	40, // 26: google.bigtable.testproxy.SqlRow.values:type_name -> google.bigtable.v2.Value
-	1,  // 27: google.bigtable.testproxy.CloudBigtableV2TestProxy.CreateClient:input_type -> google.bigtable.testproxy.CreateClientRequest
-	3,  // 28: google.bigtable.testproxy.CloudBigtableV2TestProxy.CloseClient:input_type -> google.bigtable.testproxy.CloseClientRequest
-	5,  // 29: google.bigtable.testproxy.CloudBigtableV2TestProxy.RemoveClient:input_type -> google.bigtable.testproxy.RemoveClientRequest
-	7,  // 30: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadRow:input_type -> google.bigtable.testproxy.ReadRowRequest
-	9,  // 31: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadRows:input_type -> google.bigtable.testproxy.ReadRowsRequest
-	11, // 32: google.bigtable.testproxy.CloudBigtableV2TestProxy.MutateRow:input_type -> google.bigtable.testproxy.MutateRowRequest
-	13, // 33: google.bigtable.testproxy.CloudBigtableV2TestProxy.BulkMutateRows:input_type -> google.bigtable.testproxy.MutateRowsRequest
-	15, // 34: google.bigtable.testproxy.CloudBigtableV2TestProxy.CheckAndMutateRow:input_type -> google.bigtable.testproxy.CheckAndMutateRowRequest
-	17, // 35: google.bigtable.testproxy.CloudBigtableV2TestProxy.SampleRowKeys:input_type -> google.bigtable.testproxy.SampleRowKeysRequest
-	19, // 36: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadModifyWriteRow:input_type -> google.bigtable.testproxy.ReadModifyWriteRowRequest
-	20, // 37: google.bigtable.testproxy.CloudBigtableV2TestProxy.ExecuteQuery:input_type -> google.bigtable.testproxy.ExecuteQueryRequest
-	2,  // 38: google.bigtable.testproxy.CloudBigtableV2TestProxy.CreateClient:output_type -> google.bigtable.testproxy.CreateClientResponse
-	4,  // 39: google.bigtable.testproxy.CloudBigtableV2TestProxy.CloseClient:output_type -> google.bigtable.testproxy.CloseClientResponse
-	6,  // 40: google.bigtable.testproxy.CloudBigtableV2TestProxy.RemoveClient:output_type -> google.bigtable.testproxy.RemoveClientResponse
-	8,  // 41: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadRow:output_type -> google.bigtable.testproxy.RowResult
-	10, // 42: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadRows:output_type -> google.bigtable.testproxy.RowsResult
-	12, // 43: google.bigtable.testproxy.CloudBigtableV2TestProxy.MutateRow:output_type -> google.bigtable.testproxy.MutateRowResult
-	14, // 44: google.bigtable.testproxy.CloudBigtableV2TestProxy.BulkMutateRows:output_type -> google.bigtable.testproxy.MutateRowsResult
-	16, // 45: google.bigtable.testproxy.CloudBigtableV2TestProxy.CheckAndMutateRow:output_type -> google.bigtable.testproxy.CheckAndMutateRowResult
-	18, // 46: google.bigtable.testproxy.CloudBigtableV2TestProxy.SampleRowKeys:output_type -> google.bigtable.testproxy.SampleRowKeysResult
-	8,  // 47: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadModifyWriteRow:output_type -> google.bigtable.testproxy.RowResult
-	21, // 48: google.bigtable.testproxy.CloudBigtableV2TestProxy.ExecuteQuery:output_type -> google.bigtable.testproxy.ExecuteQueryResult
-	38, // [38:49] is the sub-list for method output_type
-	27, // [27:38] is the sub-list for method input_type
-	27, // [27:27] is the sub-list for extension type_name
-	27, // [27:27] is the sub-list for extension extendee
-	0,  // [0:27] is the sub-list for field type_name
+	39, // 22: google.bigtable.testproxy.ExecuteQueryRequest.file_descriptor_set:type_name -> google.protobuf.FileDescriptorSet
+	27, // 23: google.bigtable.testproxy.ExecuteQueryResult.status:type_name -> google.rpc.Status
+	22, // 24: google.bigtable.testproxy.ExecuteQueryResult.metadata:type_name -> google.bigtable.testproxy.ResultSetMetadata
+	23, // 25: google.bigtable.testproxy.ExecuteQueryResult.rows:type_name -> google.bigtable.testproxy.SqlRow
+	40, // 26: google.bigtable.testproxy.ResultSetMetadata.columns:type_name -> google.bigtable.v2.ColumnMetadata
+	41, // 27: google.bigtable.testproxy.SqlRow.values:type_name -> google.bigtable.v2.Value
+	1,  // 28: google.bigtable.testproxy.CloudBigtableV2TestProxy.CreateClient:input_type -> google.bigtable.testproxy.CreateClientRequest
+	3,  // 29: google.bigtable.testproxy.CloudBigtableV2TestProxy.CloseClient:input_type -> google.bigtable.testproxy.CloseClientRequest
+	5,  // 30: google.bigtable.testproxy.CloudBigtableV2TestProxy.RemoveClient:input_type -> google.bigtable.testproxy.RemoveClientRequest
+	7,  // 31: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadRow:input_type -> google.bigtable.testproxy.ReadRowRequest
+	9,  // 32: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadRows:input_type -> google.bigtable.testproxy.ReadRowsRequest
+	11, // 33: google.bigtable.testproxy.CloudBigtableV2TestProxy.MutateRow:input_type -> google.bigtable.testproxy.MutateRowRequest
+	13, // 34: google.bigtable.testproxy.CloudBigtableV2TestProxy.BulkMutateRows:input_type -> google.bigtable.testproxy.MutateRowsRequest
+	15, // 35: google.bigtable.testproxy.CloudBigtableV2TestProxy.CheckAndMutateRow:input_type -> google.bigtable.testproxy.CheckAndMutateRowRequest
+	17, // 36: google.bigtable.testproxy.CloudBigtableV2TestProxy.SampleRowKeys:input_type -> google.bigtable.testproxy.SampleRowKeysRequest
+	19, // 37: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadModifyWriteRow:input_type -> google.bigtable.testproxy.ReadModifyWriteRowRequest
+	20, // 38: google.bigtable.testproxy.CloudBigtableV2TestProxy.ExecuteQuery:input_type -> google.bigtable.testproxy.ExecuteQueryRequest
+	2,  // 39: google.bigtable.testproxy.CloudBigtableV2TestProxy.CreateClient:output_type -> google.bigtable.testproxy.CreateClientResponse
+	4,  // 40: google.bigtable.testproxy.CloudBigtableV2TestProxy.CloseClient:output_type -> google.bigtable.testproxy.CloseClientResponse
+	6,  // 41: google.bigtable.testproxy.CloudBigtableV2TestProxy.RemoveClient:output_type -> google.bigtable.testproxy.RemoveClientResponse
+	8,  // 42: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadRow:output_type -> google.bigtable.testproxy.RowResult
+	10, // 43: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadRows:output_type -> google.bigtable.testproxy.RowsResult
+	12, // 44: google.bigtable.testproxy.CloudBigtableV2TestProxy.MutateRow:output_type -> google.bigtable.testproxy.MutateRowResult
+	14, // 45: google.bigtable.testproxy.CloudBigtableV2TestProxy.BulkMutateRows:output_type -> google.bigtable.testproxy.MutateRowsResult
+	16, // 46: google.bigtable.testproxy.CloudBigtableV2TestProxy.CheckAndMutateRow:output_type -> google.bigtable.testproxy.CheckAndMutateRowResult
+	18, // 47: google.bigtable.testproxy.CloudBigtableV2TestProxy.SampleRowKeys:output_type -> google.bigtable.testproxy.SampleRowKeysResult
+	8,  // 48: google.bigtable.testproxy.CloudBigtableV2TestProxy.ReadModifyWriteRow:output_type -> google.bigtable.testproxy.RowResult
+	21, // 49: google.bigtable.testproxy.CloudBigtableV2TestProxy.ExecuteQuery:output_type -> google.bigtable.testproxy.ExecuteQueryResult
+	39, // [39:50] is the sub-list for method output_type
+	28, // [28:39] is the sub-list for method input_type
+	28, // [28:28] is the sub-list for extension type_name
+	28, // [28:28] is the sub-list for extension extendee
+	0,  // [0:28] is the sub-list for field type_name
 }
 
 func init() { file_test_proxy_proto_init() }
@@ -1861,7 +1684,7 @@ func file_test_proxy_proto_init() {
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_test_proxy_proto_rawDesc,
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_test_proxy_proto_rawDesc), len(file_test_proxy_proto_rawDesc)),
 			NumEnums:      1,
 			NumMessages:   24,
 			NumExtensions: 0,
@@ -1873,7 +1696,6 @@ func file_test_proxy_proto_init() {
 		MessageInfos:      file_test_proxy_proto_msgTypes,
 	}.Build()
 	File_test_proxy_proto = out.File
-	file_test_proxy_proto_rawDesc = nil
 	file_test_proxy_proto_goTypes = nil
 	file_test_proxy_proto_depIdxs = nil
 }
diff --git a/testproxypb/test_proxy_grpc.pb.go b/testproxypb/test_proxy_grpc.pb.go
index fe75b0c3..3e7562aa 100644
--- a/testproxypb/test_proxy_grpc.pb.go
+++ b/testproxypb/test_proxy_grpc.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -15,7 +15,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.5.1
-// - protoc             v5.27.3
+// - protoc             v6.32.0
 // source: test_proxy.proto
 
 package testproxypb
diff --git a/tests/executequery_helpers.go b/tests/executequery_helpers.go
index e73feb99..88956111 100644
--- a/tests/executequery_helpers.go
+++ b/tests/executequery_helpers.go
@@ -162,6 +162,26 @@ func mapType(key *btpb.Type, value *btpb.Type) *btpb.Type {
 	}
 }
 
+func protoType(name string) *btpb.Type {
+	return &btpb.Type{
+		Kind: &btpb.Type_ProtoType{
+			ProtoType: &btpb.Type_Proto{
+				MessageName: name,
+			},
+		},
+	}
+}
+
+func enumType(name string) *btpb.Type {
+	return &btpb.Type{
+		Kind: &btpb.Type_EnumType{
+			EnumType: &btpb.Type_Enum{
+				EnumName: name,
+			},
+		},
+	}
+}
+
 func strVal(v string) *btpb.Value {
 	return &btpb.Value{
 		Kind: &btpb.Value_StringValue{
diff --git a/tests/executequery_test.go b/tests/executequery_test.go
index 02bc546a..94bb37bd 100644
--- a/tests/executequery_test.go
+++ b/tests/executequery_test.go
@@ -29,10 +29,15 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
 	"github.com/googleapis/cloud-bigtable-clients-test/testproxypb"
+	testpb "github.com/googleapis/cloud-bigtable-clients-test/tests/testdata"
 	"github.com/stretchr/testify/assert"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protodesc"
+	"google.golang.org/protobuf/reflect/protoregistry"
 	"google.golang.org/protobuf/testing/protocmp"
+	"google.golang.org/protobuf/types/descriptorpb"
 	"google.golang.org/protobuf/types/known/durationpb"
 )
 
@@ -103,6 +108,25 @@ func assertErrorIn(t *testing.T, res *testproxypb.ExecuteQueryResult, messages [
 	}
 }
 
+// Returns a FileDescriptorSet containing the proto file descriptors for the provided proto messages.
+// Messages must be provided in dependency order.
+func buildFileDescriptorSet(msgs ...proto.Message) *descriptorpb.FileDescriptorSet {
+	files := protoregistry.GlobalFiles
+	seen := make(map[string]bool)
+	fds := &descriptorpb.FileDescriptorSet{}
+
+	for _, msg := range msgs {
+		filePath := msg.ProtoReflect().Descriptor().ParentFile().Path()
+		if !seen[filePath] {
+			if fd, err := files.FindFileByPath(filePath); err == nil && fd != nil {
+				fds.File = append(fds.File, protodesc.ToFileDescriptorProto(fd))
+				seen[filePath] = true
+			}
+		}
+	}
+	return fds
+}
+
 // Tests that a query will run successfully when receiving a response with no rows
 func TestExecuteQuery_EmptyResponse(t *testing.T) {
 	// 1. Instantiate the mock server
@@ -209,7 +233,20 @@ func TestExecuteQuery_TypesTest(t *testing.T) {
 			arrayType(structType(
 				structField("timestamp", timestampType()),
 				structField("value", bytesType()))))),
+		column("protoCol", protoType(string(proto.MessageName(&testpb.Album{})))),
+		column("enumCol", enumType(string(testpb.Format(0).Descriptor().FullName()))),
 	}
+
+	album := &testpb.Album{
+		Title: "Lover",
+		Artist: &testpb.Singer{
+			Name: "Taylor Swift",
+		},
+		ReleaseYear: 2020,
+		Format:      testpb.Format_CD,
+	}
+	serializedAlbum, _ := proto.Marshal(album)
+
 	expectedValues := []*btpb.Value{
 		strVal("strVal"),
 		bytesVal([]byte("bytesVal")),
@@ -225,6 +262,8 @@ func TestExecuteQuery_TypesTest(t *testing.T) {
 		mapVal(mapEntry(bytesVal([]byte("key")), arrayVal(
 			structVal(timestampVal(10000, 1000), bytesVal([]byte("val1"))),
 			structVal(timestampVal(20000, 1000), bytesVal([]byte("val2")))))),
+		bytesVal(serializedAlbum),
+		intVal(1),
 	}
 	server.PrepareQueryFn = mockPrepareQueryFn(nil,
 		&prepareQueryAction{
@@ -246,12 +285,13 @@ func TestExecuteQuery_TypesTest(t *testing.T) {
 			InstanceName: instanceName,
 			Query:        "SELECT * FROM table",
 		},
+		FileDescriptorSet: buildFileDescriptorSet(&testpb.Singer{}, &testpb.Album{}),
 	}
 	// 3. Perform the operation via test proxy
 	res := doExecuteQueryOp(t, server, &req, nil)
 	// 4. Verify the read succeeds and gets the expected metadata & data
 	checkResultOkStatus(t, res)
-	assert.Equal(t, len(res.Metadata.Columns), 12)
+	assert.Equal(t, len(res.Metadata.Columns), 14)
 	assert.True(t, cmp.Equal(res.Metadata, testProxyMd(columns...), protocmp.Transform()))
 	assert.Equal(t, len(res.Rows), 1)
 	assertRowEqual(t, testProxyRow(expectedValues...), res.Rows[0], res.Metadata)
diff --git a/tests/testdata/album.pb.go b/tests/testdata/album.pb.go
new file mode 100644
index 00000000..da55d923
--- /dev/null
+++ b/tests/testdata/album.pb.go
@@ -0,0 +1,205 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.9
+// 	protoc        v6.32.0
+// source: tests/testdata/album.proto
+
+package testpb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Format int32
+
+const (
+	Format_CD      Format = 0
+	Format_DIGITAL Format = 1
+)
+
+// Enum value maps for Format.
+var (
+	Format_name = map[int32]string{
+		0: "CD",
+		1: "DIGITAL",
+	}
+	Format_value = map[string]int32{
+		"CD":      0,
+		"DIGITAL": 1,
+	}
+)
+
+func (x Format) Enum() *Format {
+	p := new(Format)
+	*p = x
+	return p
+}
+
+func (x Format) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Format) Descriptor() protoreflect.EnumDescriptor {
+	return file_tests_testdata_album_proto_enumTypes[0].Descriptor()
+}
+
+func (Format) Type() protoreflect.EnumType {
+	return &file_tests_testdata_album_proto_enumTypes[0]
+}
+
+func (x Format) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Format.Descriptor instead.
+func (Format) EnumDescriptor() ([]byte, []int) {
+	return file_tests_testdata_album_proto_rawDescGZIP(), []int{0}
+}
+
+type Album struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Artist        *Singer                `protobuf:"bytes,1,opt,name=artist,proto3" json:"artist,omitempty"`
+	Title         string                 `protobuf:"bytes,2,opt,name=title,proto3" json:"title,omitempty"`
+	ReleaseYear   int32                  `protobuf:"varint,3,opt,name=release_year,json=releaseYear,proto3" json:"release_year,omitempty"`
+	Format        Format                 `protobuf:"varint,4,opt,name=format,proto3,enum=execute_query.test.Format" json:"format,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Album) Reset() {
+	*x = Album{}
+	mi := &file_tests_testdata_album_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Album) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Album) ProtoMessage() {}
+
+func (x *Album) ProtoReflect() protoreflect.Message {
+	mi := &file_tests_testdata_album_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Album.ProtoReflect.Descriptor instead.
+func (*Album) Descriptor() ([]byte, []int) {
+	return file_tests_testdata_album_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Album) GetArtist() *Singer {
+	if x != nil {
+		return x.Artist
+	}
+	return nil
+}
+
+func (x *Album) GetTitle() string {
+	if x != nil {
+		return x.Title
+	}
+	return ""
+}
+
+func (x *Album) GetReleaseYear() int32 {
+	if x != nil {
+		return x.ReleaseYear
+	}
+	return 0
+}
+
+func (x *Album) GetFormat() Format {
+	if x != nil {
+		return x.Format
+	}
+	return Format_CD
+}
+
+var File_tests_testdata_album_proto protoreflect.FileDescriptor
+
+const file_tests_testdata_album_proto_rawDesc = "" +
+	"\n" +
+	"\x1atests/testdata/album.proto\x12\x12execute_query.test\x1a\x1btests/testdata/singer.proto\"\xa8\x01\n" +
+	"\x05Album\x122\n" +
+	"\x06artist\x18\x01 \x01(\v2\x1a.execute_query.test.SingerR\x06artist\x12\x14\n" +
+	"\x05title\x18\x02 \x01(\tR\x05title\x12!\n" +
+	"\frelease_year\x18\x03 \x01(\x05R\vreleaseYear\x122\n" +
+	"\x06format\x18\x04 \x01(\x0e2\x1a.execute_query.test.FormatR\x06format*\x1d\n" +
+	"\x06Format\x12\x06\n" +
+	"\x02CD\x10\x00\x12\v\n" +
+	"\aDIGITAL\x10\x01BIZGgithub.com/googleapis/cloud-bigtable-clients-test/tests/testdata;testpbb\x06proto3"
+
+var (
+	file_tests_testdata_album_proto_rawDescOnce sync.Once
+	file_tests_testdata_album_proto_rawDescData []byte
+)
+
+func file_tests_testdata_album_proto_rawDescGZIP() []byte {
+	file_tests_testdata_album_proto_rawDescOnce.Do(func() {
+		file_tests_testdata_album_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_tests_testdata_album_proto_rawDesc), len(file_tests_testdata_album_proto_rawDesc)))
+	})
+	return file_tests_testdata_album_proto_rawDescData
+}
+
+var file_tests_testdata_album_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_tests_testdata_album_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_tests_testdata_album_proto_goTypes = []any{
+	(Format)(0),    // 0: execute_query.test.Format
+	(*Album)(nil),  // 1: execute_query.test.Album
+	(*Singer)(nil), // 2: execute_query.test.Singer
+}
+var file_tests_testdata_album_proto_depIdxs = []int32{
+	2, // 0: execute_query.test.Album.artist:type_name -> execute_query.test.Singer
+	0, // 1: execute_query.test.Album.format:type_name -> execute_query.test.Format
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
+}
+
+func init() { file_tests_testdata_album_proto_init() }
+func file_tests_testdata_album_proto_init() {
+	if File_tests_testdata_album_proto != nil {
+		return
+	}
+	file_tests_testdata_singer_proto_init()
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_tests_testdata_album_proto_rawDesc), len(file_tests_testdata_album_proto_rawDesc)),
+			NumEnums:      1,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_tests_testdata_album_proto_goTypes,
+		DependencyIndexes: file_tests_testdata_album_proto_depIdxs,
+		EnumInfos:         file_tests_testdata_album_proto_enumTypes,
+		MessageInfos:      file_tests_testdata_album_proto_msgTypes,
+	}.Build()
+	File_tests_testdata_album_proto = out.File
+	file_tests_testdata_album_proto_goTypes = nil
+	file_tests_testdata_album_proto_depIdxs = nil
+}
diff --git a/tests/testdata/album.proto b/tests/testdata/album.proto
new file mode 100644
index 00000000..25a38822
--- /dev/null
+++ b/tests/testdata/album.proto
@@ -0,0 +1,18 @@
+syntax = "proto3";
+
+import "tests/testdata/singer.proto";
+
+package execute_query.test;
+option go_package = "github.com/googleapis/cloud-bigtable-clients-test/tests/testdata;testpb";
+
+enum Format {
+  CD = 0;
+  DIGITAL = 1;
+}
+
+message Album {
+  Singer artist = 1;
+  string title = 2;
+  int32 release_year = 3;
+  Format format = 4;
+}
diff --git a/tests/testdata/singer.pb.go b/tests/testdata/singer.pb.go
new file mode 100644
index 00000000..9bd07a72
--- /dev/null
+++ b/tests/testdata/singer.pb.go
@@ -0,0 +1,192 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.9
+// 	protoc        v6.32.0
+// source: tests/testdata/singer.proto
+
+package testpb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Genre int32
+
+const (
+	Genre_POP  Genre = 0
+	Genre_JAZZ Genre = 1
+	Genre_FOLK Genre = 2
+	Genre_ROCK Genre = 3
+)
+
+// Enum value maps for Genre.
+var (
+	Genre_name = map[int32]string{
+		0: "POP",
+		1: "JAZZ",
+		2: "FOLK",
+		3: "ROCK",
+	}
+	Genre_value = map[string]int32{
+		"POP":  0,
+		"JAZZ": 1,
+		"FOLK": 2,
+		"ROCK": 3,
+	}
+)
+
+func (x Genre) Enum() *Genre {
+	p := new(Genre)
+	*p = x
+	return p
+}
+
+func (x Genre) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Genre) Descriptor() protoreflect.EnumDescriptor {
+	return file_tests_testdata_singer_proto_enumTypes[0].Descriptor()
+}
+
+func (Genre) Type() protoreflect.EnumType {
+	return &file_tests_testdata_singer_proto_enumTypes[0]
+}
+
+func (x Genre) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Genre.Descriptor instead.
+func (Genre) EnumDescriptor() ([]byte, []int) {
+	return file_tests_testdata_singer_proto_rawDescGZIP(), []int{0}
+}
+
+type Singer struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Name          string                 `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Genre         Genre                  `protobuf:"varint,2,opt,name=genre,proto3,enum=execute_query.test.Genre" json:"genre,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Singer) Reset() {
+	*x = Singer{}
+	mi := &file_tests_testdata_singer_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Singer) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Singer) ProtoMessage() {}
+
+func (x *Singer) ProtoReflect() protoreflect.Message {
+	mi := &file_tests_testdata_singer_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Singer.ProtoReflect.Descriptor instead.
+func (*Singer) Descriptor() ([]byte, []int) {
+	return file_tests_testdata_singer_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Singer) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Singer) GetGenre() Genre {
+	if x != nil {
+		return x.Genre
+	}
+	return Genre_POP
+}
+
+var File_tests_testdata_singer_proto protoreflect.FileDescriptor
+
+const file_tests_testdata_singer_proto_rawDesc = "" +
+	"\n" +
+	"\x1btests/testdata/singer.proto\x12\x12execute_query.test\"M\n" +
+	"\x06Singer\x12\x12\n" +
+	"\x04name\x18\x01 \x01(\tR\x04name\x12/\n" +
+	"\x05genre\x18\x02 \x01(\x0e2\x19.execute_query.test.GenreR\x05genre*.\n" +
+	"\x05Genre\x12\a\n" +
+	"\x03POP\x10\x00\x12\b\n" +
+	"\x04JAZZ\x10\x01\x12\b\n" +
+	"\x04FOLK\x10\x02\x12\b\n" +
+	"\x04ROCK\x10\x03BIZGgithub.com/googleapis/cloud-bigtable-clients-test/tests/testdata;testpbb\x06proto3"
+
+var (
+	file_tests_testdata_singer_proto_rawDescOnce sync.Once
+	file_tests_testdata_singer_proto_rawDescData []byte
+)
+
+func file_tests_testdata_singer_proto_rawDescGZIP() []byte {
+	file_tests_testdata_singer_proto_rawDescOnce.Do(func() {
+		file_tests_testdata_singer_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_tests_testdata_singer_proto_rawDesc), len(file_tests_testdata_singer_proto_rawDesc)))
+	})
+	return file_tests_testdata_singer_proto_rawDescData
+}
+
+var file_tests_testdata_singer_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_tests_testdata_singer_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_tests_testdata_singer_proto_goTypes = []any{
+	(Genre)(0),     // 0: execute_query.test.Genre
+	(*Singer)(nil), // 1: execute_query.test.Singer
+}
+var file_tests_testdata_singer_proto_depIdxs = []int32{
+	0, // 0: execute_query.test.Singer.genre:type_name -> execute_query.test.Genre
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_tests_testdata_singer_proto_init() }
+func file_tests_testdata_singer_proto_init() {
+	if File_tests_testdata_singer_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_tests_testdata_singer_proto_rawDesc), len(file_tests_testdata_singer_proto_rawDesc)),
+			NumEnums:      1,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_tests_testdata_singer_proto_goTypes,
+		DependencyIndexes: file_tests_testdata_singer_proto_depIdxs,
+		EnumInfos:         file_tests_testdata_singer_proto_enumTypes,
+		MessageInfos:      file_tests_testdata_singer_proto_msgTypes,
+	}.Build()
+	File_tests_testdata_singer_proto = out.File
+	file_tests_testdata_singer_proto_goTypes = nil
+	file_tests_testdata_singer_proto_depIdxs = nil
+}
diff --git a/tests/testdata/singer.proto b/tests/testdata/singer.proto
new file mode 100644
index 00000000..572e7d17
--- /dev/null
+++ b/tests/testdata/singer.proto
@@ -0,0 +1,16 @@
+syntax = "proto3";
+
+package execute_query.test;
+option go_package = "github.com/googleapis/cloud-bigtable-clients-test/tests/testdata;testpb";
+
+enum Genre {
+  POP = 0;
+  JAZZ = 1;
+  FOLK = 2;
+  ROCK = 3;
+}
+
+message Singer {
+  string name = 1;
+  Genre genre = 2;
+}