diff --git a/proto/substrait_extension/range_select.proto b/proto/substrait_extension/range_select.proto
new file mode 100644
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+++ b/proto/substrait_extension/range_select.proto
@@ -0,0 +1,44 @@
+// Copyright 2023 Greptime Team
+//
+// 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
+//
+//     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.
+
+syntax = "proto3";
+
+option go_package = "github.com/GreptimeTeam/greptime-proto/go/substrait_extension";
+
+package substrait_extension;
+
+enum Fill {
+  NULL = 0;
+  PREV = 1;
+  LINEAR = 2;
+  CONST = 3;  //  Const(ScalarValue),
+}
+
+message RangeFn {
+  string name = 1;
+  //  pub data_type: DataType,
+  //  pub expr: Expr,
+  //  pub range: Duration,
+  repeated Fill fill = 5;
+  bool need_cast = 6;
+}
+
+message RangeSelect {
+  repeated RangeFn range_expr = 1;
+  //   pub align: Duration,
+  int64 align_to = 2;
+  string time_index = 3;
+  //  pub by: Vec<Expr>,
+  repeated uint32 schema_project = 6;
+}