ABAP性能实例七例-技术开发专区

ABAP性能实例七例

作者：cnblogs.com 编辑：李倩 2009-08-07 09:46 来源：IT168�

四、Typing

1.Typed vs. untyped Parameters<类型化与非类型化参数>

如果你在源程序中指定了参数的类型，那么ABAP/4编译器能够彻底的对代码进行优化。另外，使用错误顺序参数的风险更少。

    PERFORM UP1 USING 10 M6-DIMID M6-ZAEHL M6-ISOCODE M6-ANDEC M6-PRIMARY.


    FORM UP1 USING

                   REPEAT

                   DIMID

                   ZAEHL

                   ISOCODE

                   ANDEC

                   PRIMARY.

    * Identical source code left and right:

     DO REPEAT TIMES.

       T006_WA-DIMID   = DIMID.

       T006_WA-ZAEHL   = ZAEHL.

       T006_WA-ISOCODE = ISOCODE.

       T006_WA-ANDEC   = ANDEC.

       T006_WA-PRIMARY = PRIMARY.

     ENDDO.

    ENDFORM.


    PERFORM UP2 USING 10 M6-DIMID M6-ZAEHL M6-ISOCODE M6-ANDEC M6-PRIMARY.


    FORM UP2 USING

                REPEAT   TYPE I

                DIMID    LIKE T006-DIMID

                ZAEHL    LIKE T006-ZAEHL

                ISOCODE  LIKE T006-ISOCODE

                ANDEC    LIKE T006-ANDEC

                PRIMARY  LIKE T006-PRIMARY.

    * Identical source code left and right:

     DO REPEAT TIMES.

       T006_WA-DIMID   = DIMID.

       T006_WA-ZAEHL   = ZAEHL.

       T006_WA-ISOCODE = ISOCODE.

       T006_WA-ANDEC   = ANDEC.

       T006_WA-PRIMARY = PRIMARY.

      ENDDO.

    ENDFORM.

第1页：SQL Interface 第2页：Index and Buffer Support 第3页：Context 第4页：Sorted and Hashed Tables 第5页：Building unique standard tables 第6页：Filling nested internal tables 第7页：Array Operations－Appending tables 第8页：Deleting a sequence of lin 第9页：Sorting internal tables 第10页：Intersection of internal tables 第11页：Typing-Typed vs. untyped Parameters 第12页：Typed vs untyped Field-Symbols 第13页：Field Conversion 第14页：Character/String Manipulation

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