休眠中的DateDiff

Question

如何在Hibernate中使用Datediff（of MySQL）？

Answer 1

也許這可以幫助：https://forum.hibernate.org/viewtopic.php?p=2393545

Answer 2

更好地實現自己的方言。像這樣的東西

import org.hibernate.dialect.SQLServerDialect; 
import org.hibernate.dialect.function.VarArgsSQLFunction; 
import org.hibernate.type.StandardBasicTypes; 

public class MsSqlDialect extends SQLServerDialect { 
    public MsSqlDialect() { 
     super(); 
     registerFunction("DATEDIFF", new VarArgsSQLFunction(StandardBasicTypes.INTEGER, "dateDiff(", ",", ")")); 
    } 
}