diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 5b699c5e2454f2039681fe198103ddcc606b8913..be53d353c9cd5b16b91b4d33650d340f25c939af 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -93,6 +93,9 @@ static int32_t mnodeProcessAlterTableMsg(SMnodeMsg *pMsg);
 static void    mnodeProcessAlterTableRsp(SRpcMsg *rpcMsg);
 
 static int32_t mnodeFindSuperTableColumnIndex(SSTableObj *pStable, char *colName);
+static int32_t mnodeChangeSuperTableColumn(SMnodeMsg *pMsg);
+static int32_t mnodeChangeSuperTableTag(SMnodeMsg *pMsg);
+static int32_t mnodeChangeNormalTableColumn(SMnodeMsg *pMsg);
 
 static void mnodeDestroyChildTable(SCTableObj *pTable) {
   tfree(pTable->info.tableId);
@@ -1457,31 +1460,52 @@ static int32_t mnodeChangeSuperTableColumnCb(SMnodeMsg *pMsg, int32_t code) {
   return code;
 }
 
-static int32_t mnodeChangeSuperTableColumn(SMnodeMsg *pMsg, char *oldName, char *newName) {
+static int32_t mnodeChangeSuperTableColumn(SMnodeMsg *pMsg) {
+  SAlterTableMsg *pAlter = pMsg->rpcMsg.pCont;
+  char* name = pAlter->schema[0].name;
   SSTableObj *pStable = (SSTableObj *)pMsg->pTable;
-  int32_t col = mnodeFindSuperTableColumnIndex(pStable, oldName);
+  int32_t col = mnodeFindSuperTableColumnIndex(pStable, name);
   if (col < 0) {
-    mError("msg:%p, app:%p stable:%s, change column, oldName:%s, newName:%s", pMsg, pMsg->rpcMsg.ahandle,
-           pStable->info.tableId, oldName, newName);
+    mError("msg:%p, app:%p stable:%s, change column, name:%s", pMsg, pMsg->rpcMsg.ahandle,
+           pStable->info.tableId, name);
     return TSDB_CODE_MND_FIELD_NOT_EXIST;
   }
 
-  // int32_t  rowSize = 0;
-  uint32_t len = (uint32_t)strlen(newName);
-  if (len >= TSDB_COL_NAME_LEN) {
-    return TSDB_CODE_MND_COL_NAME_TOO_LONG;
-  }
+  // update
+  SSchema *schema = (SSchema *) (pStable->schema + col);
+  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 column %s len to %d", pMsg, pMsg->rpcMsg.ahandle, pStable->info.tableId,
+         name, schema->bytes);
+
+  SSdbRow row = {
+    .type   = SDB_OPER_GLOBAL,
+    .pTable = tsSuperTableSdb,
+    .pObj   = pStable,
+    .pMsg   = pMsg,
+    .fpRsp  = mnodeChangeSuperTableColumnCb
+  };
+
+  return sdbUpdateRow(&row);
+}
 
-  if (mnodeFindSuperTableColumnIndex(pStable, newName) >= 0) {
-    return TSDB_CODE_MND_FIELD_ALREAY_EXIST;
+static int32_t mnodeChangeSuperTableTag(SMnodeMsg *pMsg) {
+  SAlterTableMsg *pAlter = pMsg->rpcMsg.pCont;
+  char* name = pAlter->schema[0].name;
+  SSTableObj *pStable = (SSTableObj *)pMsg->pTable;
+  int32_t col = mnodeFindSuperTableTagIndex(pStable, name);
+  if (col < 0) {
+    mError("msg:%p, app:%p stable:%s, change column, name:%s", pMsg, pMsg->rpcMsg.ahandle,
+           pStable->info.tableId, name);
+    return TSDB_CODE_MND_FIELD_NOT_EXIST;
   }
 
   // update
   SSchema *schema = (SSchema *) (pStable->schema + col);
-  tstrncpy(schema->name, newName, sizeof(schema->name));
-
-  mInfo("msg:%p, app:%p stable %s, start to modify column %s to %s", pMsg, pMsg->rpcMsg.ahandle, pStable->info.tableId,
-         oldName, newName);
+  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,
+         name, schema->bytes);
 
   SSdbRow row = {
     .type   = SDB_OPER_GLOBAL,
@@ -2355,31 +2379,23 @@ static int32_t mnodeDropNormalTableColumn(SMnodeMsg *pMsg, char *colName) {
   return sdbUpdateRow(&row);
 }
 
-static int32_t mnodeChangeNormalTableColumn(SMnodeMsg *pMsg, char *oldName, char *newName) {
+static int32_t mnodeChangeNormalTableColumn(SMnodeMsg *pMsg) {
+  SAlterTableMsg *pAlter = pMsg->rpcMsg.pCont;
+  char* name = pAlter->schema[0].name;
   SCTableObj *pTable = (SCTableObj *)pMsg->pTable;
-  int32_t col = mnodeFindNormalTableColumnIndex(pTable, oldName);
+  int32_t col = mnodeFindNormalTableColumnIndex(pTable, name);
   if (col < 0) {
-    mError("msg:%p, app:%p ctable:%s, change column, oldName: %s, newName: %s", pMsg, pMsg->rpcMsg.ahandle,
-           pTable->info.tableId, oldName, newName);
+    mError("msg:%p, app:%p ctable:%s, change column, name: %s", pMsg, pMsg->rpcMsg.ahandle,
+           pTable->info.tableId, name);
     return TSDB_CODE_MND_FIELD_NOT_EXIST;
   }
 
-  // int32_t  rowSize = 0;
-  uint32_t len = (uint32_t)strlen(newName);
-  if (len >= TSDB_COL_NAME_LEN) {
-    return TSDB_CODE_MND_COL_NAME_TOO_LONG;
-  }
-
-  if (mnodeFindNormalTableColumnIndex(pTable, newName) >= 0) {
-    return TSDB_CODE_MND_FIELD_ALREAY_EXIST;
-  }
-
-  // update
   SSchema *schema = (SSchema *) (pTable->schema + col);
-  tstrncpy(schema->name, newName, sizeof(schema->name));
+  ASSERT(schema->type == TSDB_DATA_TYPE_BINARY || schema->type == TSDB_DATA_TYPE_NCHAR);
+  schema->bytes = pAlter->schema[0].bytes;
 
-  mInfo("msg:%p, app:%p ctable %s, start to modify column %s to %s", pMsg, pMsg->rpcMsg.ahandle, pTable->info.tableId,
-         oldName, newName);
+  mInfo("msg:%p, app:%p ctable %s, start to modify column %s len to %d", pMsg, pMsg->rpcMsg.ahandle, pTable->info.tableId,
+         name, schema->bytes);
 
   SSdbRow row = {
     .type   = SDB_OPER_GLOBAL,
@@ -3214,15 +3230,9 @@ static int32_t mnodeProcessAlterTableMsg(SMnodeMsg *pMsg) {
     } else if (pAlter->type == TSDB_ALTER_TABLE_DROP_COLUMN) {
       code = mnodeDropSuperTableColumn(pMsg, pAlter->schema[0].name);
     } else if (pAlter->type == TSDB_ALTER_TABLE_CHANGE_COLUMN) {
-      //code = mnodeChangeSuperTableColumn(pMsg, pAlter->schema[0].name, pAlter->schema[1].name);
-      (void)mnodeChangeSuperTableColumn;
-      mError("change table[%s] column[%s] length to [%d] is not processed", pAlter->tableFname, pAlter->schema[0].name, pAlter->schema[0].bytes);
-      code = TSDB_CODE_SUCCESS;
+      code = mnodeChangeSuperTableColumn(pMsg);
     } else if (pAlter->type == TSDB_ALTER_TABLE_MODIFY_TAG_COLUMN) {
-      //code = mnodeChangeSuperTableColumn(pMsg, pAlter->schema[0].name, pAlter->schema[1].name);
-      (void)mnodeChangeSuperTableColumn;
-      mError("change table[%s] tag[%s] length to [%d] is not processed", pAlter->tableFname, pAlter->schema[0].name, pAlter->schema[0].bytes);
-      code = TSDB_CODE_SUCCESS;
+      code = mnodeChangeSuperTableTag(pMsg);
     } else {
     }
   } else {
@@ -3234,10 +3244,7 @@ static int32_t mnodeProcessAlterTableMsg(SMnodeMsg *pMsg) {
     } else if (pAlter->type == TSDB_ALTER_TABLE_DROP_COLUMN) {
       code = mnodeDropNormalTableColumn(pMsg, pAlter->schema[0].name);
     } else if (pAlter->type == TSDB_ALTER_TABLE_CHANGE_COLUMN) {
-      //code = mnodeChangeNormalTableColumn(pMsg, pAlter->schema[0].name, pAlter->schema[1].name);      
-      (void)mnodeChangeNormalTableColumn;
-      mError("change table[%s] column[%s] length to [%d] is not processed", pAlter->tableFname, pAlter->schema[0].name, pAlter->schema[0].bytes);
-      code = TSDB_CODE_SUCCESS;
+      code = mnodeChangeNormalTableColumn(pMsg);
     } else {
     }
   }