UUID含义是通用唯一识别码 (Universally Unique Identifier)，通俗一点就是一个不重复的字符串，有时会把UUID作为数据库的一个主键，这样就不用担心主键重复的问题。
SAP中有个专门生成CL_SYSTEM_UUID，提供了4个静态方法创建生成不同类型的UUID：2进制，16进制，64位以及32位uuid。
也可以进行不同类型UUID之间的相互转换。
代码：
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REPORT ztest_uuid. DATA:l_uuid22 TYPE sysuuid_c22, l_uuid32 TYPE sysuuid_c32, l_uuid26 TYPE sysuuid_c26, l_uuid16 TYPE sysuuid_x16. TRY. CALL METHOD cl_system_uuid=>if_system_uuid_static~create_uuid_x16 RECEIVING uuid = l_uuid16. CATCH cx_uuid_error . ENDTRY. TRY. CALL METHOD cl_system_uuid=>if_system_uuid_static~create_uuid_c22 RECEIVING uuid = l_uuid22. CATCH cx_uuid_error . ENDTRY. TRY. CALL METHOD cl_system_uuid=>if_system_uuid_static~create_uuid_c32 RECEIVING uuid = l_uuid32. CATCH cx_uuid_error . ENDTRY. TRY. CALL METHOD cl_system_uuid=>if_system_uuid_static~create_uuid_c26 RECEIVING uuid = l_uuid26. CATCH cx_uuid_error . ENDTRY. WRITE: `Binary Format UUID:`,l_uuid16. WRITE:/ `Base64 UUID: `,l_uuid22. WRITE:/ `Base32 UUID: `,l_uuid26. WRITE:/ `Hex Format UUID: `,l_uuid32. |
运行结果：
也可以通过函数SYSTEM_UUID_CREATE来生成UUID，SE37
看一下代码，其中也是调用类CL_SYSTEM_UUID创建的二进制类型UUID
以上。
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