:original_name: ddm_12_0008.html

.. _ddm_12_0008:

Unsupported DML Statements
==========================


Unsupported DML Statements
--------------------------

.. table:: **Table 1** Syntax restrictions on DML

   +------------------+-----------------------------------------------------------------------------------+
   | DML Syntax       | Restriction                                                                       |
   +==================+===================================================================================+
   | DELETE statement | PARTITION clauses are not supported.                                              |
   +------------------+-----------------------------------------------------------------------------------+
   | UPDATE statement | Cross-shard subquery is not supported.                                            |
   +------------------+-----------------------------------------------------------------------------------+
   | SELECT statement | User-defined sequencing similar to **ORDER BY FIELD(id,1,2,3)** is not supported. |
   +------------------+-----------------------------------------------------------------------------------+