CREATE BROADCAST TABLE RULE 语法用于为需要广播的表(广播表)创建广播规则
CreateBroadcastTableRule ::=
  'CREATE' 'BROADCAST' 'TABLE' 'RULE'  tableName (',' tableName)* 
tableName ::=
  identifier
tableName 可使用已经存在的表或者将要创建的表;CREATE BROADCAST TABLE RULE。-- 将 t_province, t_city 添加到广播规则中 
CREATE BROADCAST TABLE RULE t_province, t_city;
CREATE、BROADCAST、TABLE、RULE
