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diff --git a/src/arrow/cpp/src/gandiva/function_signature.h b/src/arrow/cpp/src/gandiva/function_signature.h
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+++ b/src/arrow/cpp/src/gandiva/function_signature.h
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+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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
+//
+//   http://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.
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "gandiva/arrow.h"
+#include "gandiva/visibility.h"
+
+namespace gandiva {
+
+/// \brief Signature for a function : includes the base name, input param types and
+/// output types.
+class GANDIVA_EXPORT FunctionSignature {
+ public:
+  FunctionSignature(std::string base_name, DataTypeVector param_types,
+                    DataTypePtr ret_type);
+
+  bool operator==(const FunctionSignature& other) const;
+
+  /// calculated based on name, datatype id of parameters and datatype id
+  /// of return type.
+  std::size_t Hash() const;
+
+  DataTypePtr ret_type() const { return ret_type_; }
+
+  const std::string& base_name() const { return base_name_; }
+
+  DataTypeVector param_types() const { return param_types_; }
+
+  std::string ToString() const;
+
+ private:
+  std::string base_name_;
+  DataTypeVector param_types_;
+  DataTypePtr ret_type_;
+};
+
+}  // namespace gandiva