diff --git a/dbms/src/Storages/DeltaMerge/Decode/SSTFilesToBlockInputStream.h b/dbms/src/Storages/DeltaMerge/Decode/SSTFilesToBlockInputStream.h
index fa210dcc2ae..3c76a9136c0 100644
--- a/dbms/src/Storages/DeltaMerge/Decode/SSTFilesToBlockInputStream.h
+++ b/dbms/src/Storages/DeltaMerge/Decode/SSTFilesToBlockInputStream.h
@@ -17,6 +17,7 @@
 #include <DataStreams/IBlockInputStream.h>
 #include <RaftStoreProxyFFI/ColumnFamily.h>
 #include <Storages/DeltaMerge/DMVersionFilterBlockInputStream.h>
+#include <Storages/DeltaMerge/Decode/SSTScanSoftLimit.h>
 #include <Storages/KVStore/Decode/PartitionStreams.h>
 #include <Storages/KVStore/MultiRaft/PreHandlingTrace.h>
 
@@ -42,52 +43,6 @@ using SSTFilesToBlockInputStreamPtr = std::shared_ptr<SSTFilesToBlockInputStream
 class BoundedSSTFilesToBlockInputStream;
 using BoundedSSTFilesToBlockInputStreamPtr = std::shared_ptr<BoundedSSTFilesToBlockInputStream>;
 
-struct SSTScanSoftLimit
-{
-    constexpr static size_t HEAD_OR_ONLY_SPLIT = SIZE_MAX;
-    size_t split_id;
-    TiKVKey raw_start;
-    TiKVKey raw_end;
-    DecodedTiKVKey decoded_start;
-    DecodedTiKVKey decoded_end;
-    std::optional<RawTiDBPK> start_limit;
-    std::optional<RawTiDBPK> end_limit;
-
-    SSTScanSoftLimit(size_t split_id_, TiKVKey && raw_start_, TiKVKey && raw_end_)
-        : split_id(split_id_)
-        , raw_start(std::move(raw_start_))
-        , raw_end(std::move(raw_end_))
-    {
-        if (!raw_start.empty())
-        {
-            decoded_start = RecordKVFormat::decodeTiKVKey(raw_start);
-        }
-        if (!raw_end.empty())
-        {
-            decoded_end = RecordKVFormat::decodeTiKVKey(raw_end);
-        }
-        if (!decoded_start.empty())
-        {
-            start_limit = RecordKVFormat::getRawTiDBPK(decoded_start);
-        }
-        if (!decoded_end.empty())
-        {
-            end_limit = RecordKVFormat::getRawTiDBPK(decoded_end);
-        }
-    }
-
-    SSTScanSoftLimit clone() const { return SSTScanSoftLimit(split_id, raw_start.toString(), raw_end.toString()); }
-
-    const std::optional<RawTiDBPK> & getStartLimit() const { return start_limit; }
-
-    const std::optional<RawTiDBPK> & getEndLimit() const { return end_limit; }
-
-    std::string toDebugString() const
-    {
-        return fmt::format("{}:{}", raw_start.toDebugString(), raw_end.toDebugString());
-    }
-};
-
 struct SSTFilesToBlockInputStreamOpts
 {
     std::string log_prefix;
diff --git a/dbms/src/Storages/DeltaMerge/Decode/SSTScanSoftLimit.h b/dbms/src/Storages/DeltaMerge/Decode/SSTScanSoftLimit.h
new file mode 100644
index 00000000000..7c98abdbbf4
--- /dev/null
+++ b/dbms/src/Storages/DeltaMerge/Decode/SSTScanSoftLimit.h
@@ -0,0 +1,71 @@
+// Copyright 2024 PingCAP, Inc.
+//
+// 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.
+
+#include <RaftStoreProxyFFI/ProxyFFI.h>
+#include <Storages/KVStore/Decode/DecodedTiKVKeyValue.h>
+#include <Storages/KVStore/FFI/SSTReader.h>
+#include <Storages/KVStore/MultiRaft/RegionState.h>
+#include <Storages/KVStore/TiKVHelpers/TiKVKeyValue.h>
+#include <Storages/KVStore/TiKVHelpers/TiKVRecordFormat.h>
+
+namespace DB::DM
+{
+
+struct SSTScanSoftLimit
+{
+    constexpr static size_t HEAD_OR_ONLY_SPLIT = SIZE_MAX;
+    size_t split_id;
+    TiKVKey raw_start;
+    TiKVKey raw_end;
+    DecodedTiKVKey decoded_start;
+    DecodedTiKVKey decoded_end;
+    std::optional<RawTiDBPK> start_limit;
+    std::optional<RawTiDBPK> end_limit;
+
+    SSTScanSoftLimit(size_t split_id_, TiKVKey && raw_start_, TiKVKey && raw_end_)
+        : split_id(split_id_)
+        , raw_start(std::move(raw_start_))
+        , raw_end(std::move(raw_end_))
+    {
+        if (!raw_start.empty())
+        {
+            decoded_start = RecordKVFormat::decodeTiKVKey(raw_start);
+        }
+        if (!raw_end.empty())
+        {
+            decoded_end = RecordKVFormat::decodeTiKVKey(raw_end);
+        }
+        if (!decoded_start.empty())
+        {
+            start_limit = RecordKVFormat::getRawTiDBPK(decoded_start);
+        }
+        if (!decoded_end.empty())
+        {
+            end_limit = RecordKVFormat::getRawTiDBPK(decoded_end);
+        }
+    }
+
+    SSTScanSoftLimit clone() const { return SSTScanSoftLimit(split_id, raw_start.toString(), raw_end.toString()); }
+
+    const std::optional<RawTiDBPK> & getStartLimit() const { return start_limit; }
+
+    const std::optional<RawTiDBPK> & getEndLimit() const { return end_limit; }
+
+    std::string toDebugString() const
+    {
+        return fmt::format("{}:{}", raw_start.toDebugString(), raw_end.toDebugString());
+    }
+};
+
+} // namespace DB::DM