diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index 44a138cec422fe4315126778987b64dd9677e058..9bcada27cbe0c54c18ebf6ab90e04de7ccb1a914 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -375,6 +375,7 @@ int tdInitDataCols(SDataCols *pCols, STSchema *pSchema) {
 
   for (i = 0; i < schemaNCols(pSchema); i++) {
     dataColInit(pCols->cols + i, schemaColAt(pSchema, i), pCols->maxPoints);
+    pCols->cols[i].spaceSize = 0;
     tdAllocMemForCol(pCols->cols + i, pCols->maxPoints);
   }