diff --git a/internal/core/src/common/Types.cpp b/internal/core/src/common/Types.cpp
index eea0825893..f0b2c03cb0 100644
--- a/internal/core/src/common/Types.cpp
+++ b/internal/core/src/common/Types.cpp
@@ -51,16 +51,3 @@ MetricTypeToName(MetricType metric_type) {
 }
 
 }  // namespace milvus
-
-CProtoResult
-CTestBoolArrayPb(CProto pb) {
-    milvus::proto::schema::BoolArray bool_array;
-    bool_array.ParseFromArray(pb.proto_blob, pb.proto_size);
-    // std::cout << pb.proto_size << std::endl;
-    // std::cout << bool_array.DebugString() << std::endl;
-    for (auto& b : *bool_array.mutable_data()) {
-        b = !b;
-    }
-    // create bool proto
-    return milvus::AllocCProtoResult(bool_array);
-}
diff --git a/internal/core/src/common/type_c.h b/internal/core/src/common/type_c.h
index 35912a5c63..f521332b98 100644
--- a/internal/core/src/common/type_c.h
+++ b/internal/core/src/common/type_c.h
@@ -58,9 +58,6 @@ typedef struct CProtoResult {
     CProto proto;
 } CProtoResult;
 
-CProtoResult
-CTestBoolArrayPb(CProto pb);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/internal/querynode/cgo_helper.go b/internal/querynode/cgo_helper.go
index 06384ca8b9..e06b2997fc 100644
--- a/internal/querynode/cgo_helper.go
+++ b/internal/querynode/cgo_helper.go
@@ -27,7 +27,6 @@ import (
 	"github.com/golang/protobuf/proto"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/proto/commonpb"
-	"github.com/milvus-io/milvus/internal/proto/schemapb"
 	"unsafe"
 )
 
@@ -95,14 +94,3 @@ func HandleCProtoResult(cRes *C.CProtoResult, msg proto.Message) error {
 	defer C.free(cpro.proto_blob)
 	return proto.Unmarshal(blob, msg)
 }
-
-// TestBoolArray this function will accept a BoolArray input,
-// and return a BoolArray output
-// which negates all elements of the input
-func TestBoolArray(cpb *ProtoCGo) (*schemapb.BoolArray, error) {
-	res := C.CTestBoolArrayPb(cpb.CProto)
-	ba := new(schemapb.BoolArray)
-	err := HandleCProtoResult(&res, ba)
-
-	return ba, err
-}
diff --git a/internal/querynode/cgo_helper_test.go b/internal/querynode/cgo_helper_test.go
index 06c457f574..6617b88223 100644
--- a/internal/querynode/cgo_helper_test.go
+++ b/internal/querynode/cgo_helper_test.go
@@ -11,16 +11,6 @@ func TestCGoHelper_Naive(t *testing.T) {
 	pb := schemapb.BoolArray{
 		Data: []bool{true, false, true, true, true},
 	}
-	cpb, err := MarshalForCGo(&pb)
+	_, err := MarshalForCGo(&pb)
 	assert.Nil(t, err)
-
-	// this function will accept a BoolArray input,
-	// and return a BoolArray output
-	// which negates all elements of the input
-	ba, err := TestBoolArray(cpb)
-
-	assert.Nil(t, err)
-	for index, b := range ba.Data {
-		assert.Equal(t, b, !pb.Data[index])
-	}
 }