This section describes the syntax for the BEGIN ... END compound statement and other statements that can be used in the body of stored programs: Stored procedures and functions, triggers, and events. These objects are defined in terms of SQL code that is stored on the server for later invocation (see Chapter 27, Stored Objects).

复合语句是一个代码块，可以包含其他代码块；变量、条件处理程序和游标的声明；以及如循环和条件测试等流程控制结构。A compound statement is a block that can contain other blocks; declarations for variables, condition handlers, and cursors; and flow control constructs such as loops and conditional tests.