From 9d492a8d93268cb9e1f7ea0d152b5fcbdc215479 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Tue, 2 Jun 2020 17:09:56 +0800
Subject: [PATCH] [td-225] fix bugs in dynamic set tags values during on demand
 create table

---
 src/client/src/tscParseInsert.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/client/src/tscParseInsert.c b/src/client/src/tscParseInsert.c
index 79872e22c8..999d103c12 100644
--- a/src/client/src/tscParseInsert.c
+++ b/src/client/src/tscParseInsert.c
@@ -925,7 +925,11 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
 
       for (int32_t i = 0; i < spd.numOfCols; ++i) {
         if (!spd.hasVal[i]) {  // current tag column do not have any value to insert, set it to null
-          setNull(ptr, pTagSchema[i].type, pTagSchema[i].bytes);
+          if (pTagSchema[i].type == TSDB_DATA_TYPE_BINARY || pTagSchema[i].type == TSDB_DATA_TYPE_NCHAR) {
+            setVardataNull(ptr, pTagSchema[i].type);
+          } else {
+            setNull(ptr, pTagSchema[i].type, pTagSchema[i].bytes);
+          }
         }
 
         ptr += pTagSchema[i].bytes;
-- 
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