From 4a9d62b467f7f246650c8a83cb7f04ed5ae3d988 Mon Sep 17 00:00:00 2001
From: dapan1121 <wpan@taosdata.com>
Date: Wed, 19 Apr 2023 10:18:41 +0800
Subject: [PATCH] enh: ignore single row null data type validation

---
 source/common/src/tdataformat.c        | 8 +++++---
 source/libs/parser/src/parInsertStmt.c | 2 +-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index d6ab974c6c..f379084cf5 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -2503,9 +2503,11 @@ _exit:
 int32_t tColDataAddValueByBind(SColData *pColData, TAOS_MULTI_BIND *pBind) {
   int32_t code = 0;
 
-  ASSERT(pColData->type == pBind->buffer_type);
-
-  if (IS_VAR_DATA_TYPE(pBind->buffer_type)) {  // var-length data type
+  if (!(pBind->num == 1 && pBind->is_null && *pBind->is_null)) {
+    ASSERT(pColData->type == pBind->buffer_type);
+  }
+  
+  if (IS_VAR_DATA_TYPE(pColData->type)) {  // var-length data type
     for (int32_t i = 0; i < pBind->num; ++i) {
       if (pBind->is_null && pBind->is_null[i]) {
         code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NULL](pColData, NULL, 0);
diff --git a/source/libs/parser/src/parInsertStmt.c b/source/libs/parser/src/parInsertStmt.c
index 01a635e4b2..922a0f45ff 100644
--- a/source/libs/parser/src/parInsertStmt.c
+++ b/source/libs/parser/src/parInsertStmt.c
@@ -251,7 +251,7 @@ int32_t qBindStmtColsValue(void* pBlock, TAOS_MULTI_BIND* bind, char* msgBuf, in
       goto _return;
     }
 
-    if (bind[c].buffer_type != pColSchema->type) {
+    if ((!(rowNum == 1 && bind[c].is_null && *bind[c].is_null)) && bind[c].buffer_type != pColSchema->type) { // for rowNum ==1 , connector may not set buffer_type
       code = buildInvalidOperationMsg(&pBuf, "column type mis-match with buffer type");
       goto _return;
     }
-- 
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