diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index 4e051b8b30430c4c919fb2e417cf8f3346b4e4b0..c455047146c343ea94c34eaea06f80040df52d21 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -1134,6 +1134,7 @@ void tBlockDataReset(SBlockData *pBlockData) {
   pBlockData->suid = 0;
   pBlockData->uid = 0;
   pBlockData->nRow = 0;
+  pBlockData->nColData = 0;
 }
 
 void tBlockDataClear(SBlockData *pBlockData) {