DEALLOCATE

    DeallocateStmt:

    DeallocateSym:

    Identifier:

      1. Query OK, 0 rows affected (0.00 sec)
      2. | num  |
      3. +------+
      4. +------+
      5. 1 row in set (0.00 sec)

      DEALLOCATE 语句与 MySQL 完全兼容。如有任何兼容性差异，请在 GitHub 上提交 issue。