diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index f13e5e5de83fbe70ab2be6c17a859035ba26a5c0..d5bb6fbb1ff68e742c916fb1a2d5e8e76430d735 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -1255,7 +1255,7 @@ int32_t getEndPosInDataBlock(STsdbQueryHandle* pQueryHandle, SDataBlockInfo* pBl
 
 // only return the qualified data to client in terms of query time window, data rows in the same block but do not
 // be included in the query time window will be discarded
-static void doMergeTwoLevelData(STsdbQueryHandle* pQueryHandle, STableCheckInfo* pCheckInfo, SCompBlock* pBlock) {
+static UNUSED_FUNC void doMergeTwoLevelData(STsdbQueryHandle* pQueryHandle, STableCheckInfo* pCheckInfo, SCompBlock* pBlock) {
   SQueryFilePos* cur = &pQueryHandle->cur;
   SDataBlockInfo blockInfo = GET_FILE_DATA_BLOCK_INFO(pCheckInfo, pBlock);