diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index e8206399b2a849858867c70c71ea0e2ea8f52b3a..cbfc0e360bd8813e8b1cbb21407460e7db47a52e 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -875,6 +875,8 @@ int32_t convertScalarParamToDataBlock(SScalarParam *input, int32_t numOfCols, SS
     }
   }
 
+  output->info.rows = numOfRows;
+
   return 0;
 }