From c8a42e11826c3762bf2c6c25686860884fafcf86 Mon Sep 17 00:00:00 2001
From: lichuang <lichuang1982@gmail.com>
Date: Tue, 15 Jun 2021 10:54:59 +0800
Subject: [PATCH] [TD-4394]fix core when modify tag width

---
 src/mnode/src/mnodeTable.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index be53d353c9..a225c0d938 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1501,7 +1501,7 @@ static int32_t mnodeChangeSuperTableTag(SMnodeMsg *pMsg) {
   }
 
   // update
-  SSchema *schema = (SSchema *) (pStable->schema + col);
+  SSchema *schema = (SSchema *) (pStable->schema + col + pStable->numOfColumns);
   ASSERT(schema->type == TSDB_DATA_TYPE_BINARY || schema->type == TSDB_DATA_TYPE_NCHAR);
   schema->bytes = pAlter->schema[0].bytes;
   mInfo("msg:%p, app:%p stable %s, start to modify tag len %s to %d", pMsg, pMsg->rpcMsg.ahandle, pStable->info.tableId,
-- 
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