不太写触发器，今天遇到个语法问题，在朋友（DBA）的帮助下解决了，记录下来。
需求：在CLASS_PROPERTY_REL删除记录时，调用存储过程gen_ci_property_value
问题反馈：
SQL 错误 [1064] [42000]: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DELIMITERCREATE TRIGGER cpr_del AFTER DELETE ON CLASS_PROPERTY_REL FOR EACH ROW' at line 1
DELIMITER $$CREATE TRIGGER cpr_del AFTER DELETE ON CLASS_PROPERTY_REL FOR EACH ROW BEGIN CALL gen_ci_property_value();END$$DELIMITER ;
因为创建proc的语句是个整体，你不希望执行一行就结束了，所以需要临时改变一下定界符，结束后，‘DELIMITER ;’是把定界符再改回默认
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