diff --git a/source/dnode/vnode/src/tsdb/tsdbSnapshot.c b/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
index befaf4a3e0c2d3883e732e2717e28f3c9d59e1c4..ded4a208604277cc72ff13ec1a6854278f1128fc 100644
--- a/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
+++ b/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
@@ -678,7 +678,7 @@ static int32_t tsdbSnapReadTimeSeriesData(STsdbSnapReader* pReader, uint8_t** pp
 
   STsdb* pTsdb = pReader->pTsdb;
 
-  tBlockDataClear(&pReader->bData);
+  tBlockDataReset(&pReader->bData);
 
   for (;;) {
     // start a new file read if need