Merge pull request #6389 from taosdata/hotfix/TD-4564

[TD-4564]fix string issue

src/client/src/tscSQLParser.c

@@ -314,7 +314,9 @@ int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo) {
         }
         
       } else if (pInfo->type == TSDB_SQL_DROP_DNODE) {
-        pzName->n = strdequote(pzName->z);
+        if (pzName->type == TK_STRING) {
+          pzName->n = strdequote(pzName->z);
+        }
         strncpy(pCmd->payload, pzName->z, pzName->n);
       } else {  // drop user/account
         if (pzName->n >= TSDB_USER_LEN) {
@@ -392,7 +394,9 @@ int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo) {
       }
 
       SStrToken* id = taosArrayGet(pInfo->pMiscInfo->a, 0);
-      id->n = strdequote(id->z);
+      if (id->type == TK_STRING) {
+        id->n = strdequote(id->z);
+      }
       break;
     }