hibernate ifnull

mysql中sql语句的ifnull函数,在hibernate的hql中可用coalesce代替。

例:

mysql的sql:select ifnull(max(sort),0) from table;

hibernate的hql:select coalesce(max(sort),0) from table;

经测试,这2个sql在mysql中都能执行:

select ifnull(max(sort),0) from table;

select coalesce(max(sort),0) from table;

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参考:https://forum.hibernate.org/viewtopic.php?f=1&t=938874

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转载自www.cnblogs.com/cdfive2018/p/9061199.html