diff --git a/include/common/tdataformat.h b/include/common/tdataformat.h
index 179b46db0a..0ad2a1d305 100644
--- a/include/common/tdataformat.h
+++ b/include/common/tdataformat.h
@@ -94,7 +94,6 @@ void    tRowGet(SRow *pRow, STSchema *pTSchema, int32_t iCol, SColVal *pColVal);
 int32_t  tRowIterOpen(SRow *pRow, STSchema *pTSchema, SRowIter **ppIter);
 void     tRowIterClose(SRowIter **ppIter);
 SColVal *tRowIterNext(SRowIter *pIter);
-SColVal *tRowIterNextNotNone(SRowIter *pIter);
 
 // STag ================================
 int32_t tTagNew(SArray *pArray, int32_t version, int8_t isJson, STag **ppTag);
diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index dd64c20a71..823b9182c2 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -708,11 +708,6 @@ _exit:
   return &pIter->cv;
 }
 
-SColVal *tRowIterNextNotNone(SRowIter *pIter) {
-  // todo
-  return NULL;
-}
-
 // STSchema ========================================
 void tTSchemaDestroy(STSchema *pTSchema) {
   if (pTSchema) taosMemoryFree(pTSchema);