Mybatis 异常: The content of elements must consist of well-formed character data or markup

今天写了一个SQL语句，放入工程

SELECT *
FROM GR_EDUCATION_BACKGROUND
WHERE SYSDATE - decode(eb_end_date, null, sysdate, EB_END_DATE) < 730
结果报错，The content of elements must consist of well-formed character data or markup，查了很多，结果发现，貌似mybatis不能有小于号，把代码更换成

SELECT *
FROM GR_EDUCATION_BACKGROUND
WHERE 730 > SYSDATE - decode(eb_end_date, null, sysdate, EB_END_DATE)

结果错误就很神奇的消失了。。。。。