类的使用
org.h2.engine.UserAggregate

使用UserAggregate的程序包

程序包	说明
org.h2.engine	Contains high level classes of the database and classes that don't fit in another sub-package.
org.h2.expression	Expressions include mathematical operations, conditions, simple values, and functions.

org.h2.engine中UserAggregate的使用

返回UserAggregate的org.h2.engine中的方法

限定符和类型	方法和说明
UserAggregate	Database.findAggregate(String name) Get the user defined aggregate function if it exists, or null if not.

返回变量类型为UserAggregate的类型的org.h2.engine中的方法

限定符和类型	方法和说明
ArrayList<UserAggregate>	Database.getAllAggregates()

org.h2.expression中UserAggregate的使用

参数类型为UserAggregate的org.h2.expression中的构造器

构造器和说明
JavaAggregate(UserAggregate userAggregate, Expression[] args, Select select)