morningman commented on a change in pull request #2979: Incomplete support 
Array type (#2871)
URL: https://github.com/apache/incubator-doris/pull/2979#discussion_r386759459
 
 

 ##########
 File path: be/src/util/mysql_row_buffer.cpp
 ##########
 @@ -109,15 +132,24 @@ int MysqlRowBuffer::push_tinyint(int8_t data) {
         return ret;
     }
 
-    int length = snprintf(_pos + 1, MAX_TINYINT_WIDTH + 2, "%d", data);
+    int size_bytes = 0;
+    if (NOT_DYNAMIC_MODE) {
 
 Review comment:
   In most case, NOT_DYNAMIC_MODE is true, so here we have to set size_bytes 
twice.
   How about change it to
   ```
   int size_bytes = 1;
   if (DYNAMIC_MODE) {
       size_bytes = 0;
   }
   ```

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