From 36c19fc824f637cd7745e7ff8f4e5becb0d8defa Mon Sep 17 00:00:00 2001
From: wangmm0220 <wangmm0220@gmail.com>
Date: Tue, 19 Jul 2022 10:39:05 +0800
Subject: [PATCH] fix:tag is too long if type is nchar in schemaless influxdb

---
 source/client/src/clientSml.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index 49f26e2c24..078ecbb4db 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -1217,6 +1217,9 @@ static int32_t smlParseCols(const char *data, int32_t len, SArray *cols, char *c
     kv->value = value;
     kv->length = valueLen;
     if (isTag) {
+      if(valueLen > (TSDB_MAX_NCHAR_LEN - VARSTR_HEADER_SIZE) / TSDB_NCHAR_SIZE){
+        return TSDB_CODE_PAR_INVALID_VAR_COLUMN_LEN;
+      }
       kv->type = TSDB_DATA_TYPE_NCHAR;
     } else {
       int32_t ret = smlParseValue(kv, msg);