diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index 5610f0f75e..d7b2af8706 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -259,7 +259,7 @@ bool isNEleNull(SDataCol *pCol, int nEle) {
     case TSDB_DATA_TYPE_BINARY:
     case TSDB_DATA_TYPE_NCHAR:
       for (int i = 0; i < nEle; i++) {
-        if (!isNull(varDataVal(tdGetColDataOfRow(pCol, i)), pCol->type)) return false;
+        if (!isNull(tdGetColDataOfRow(pCol, i), pCol->type)) return false;
       }
       return true;
     default:
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 8f565cd9c6..aeacdd2351 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -2219,7 +2219,7 @@ static void doSetTagValueInParam(void *tsdb, void* pTable, int32_t tagColId, tVa
     }
     
     if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
-      if (isNull(varDataVal(val), type)) {
+      if (isNull(val, type)) {
         tag->nType = TSDB_DATA_TYPE_NULL;
         return;
       }