动态取得数据的方法

动态取得数据的方法

ABAP动态查询的实现：可以完全实现动态查询，每个字段都可以动态。

（1）         利用宏

（2）         利用abap指针

（3）         利用FIELD-SYMBOL

具体实现：

1.结构的动态查询

DEFINE SELECT_DATA_TO_WA.

 SELECT &1

    FROM &2

    INTO CORRESPONDING FIELDS OF &3

   WHERE (&4).

    EXIT.

 ENDSELECT.

END-OF-DEFINITION.

2.变量的动态查询

DEFINE SELECT_DATA_TO_VARIANT.

 SELECT &1

    FROM &2

    INTO &3

   WHERE (&4).

    EXIT.

 ENDSELECT.

END-OF-DEFINITION.

3.内表的动态查询

DEFINE SELECT_DATA_TO_VARIANT.

 SELECT &1

    FROM &2

    INTO CORRESPONDING FIELDS OF TABLE &3

   WHERE (&4).

    EXIT.

 ENDSELECT.

END-OF-DEFINITION.

 

 

具体程序实现：

 

DATA: L_FIELD(100) TYPE C,

       L_TABLE(10) TYPE C,

       L_COND(100) TYPE C.

DATA: I_COND TYPE TALBE OF L_COND.

FIELD-SYMBOLS <fs> TYPE ANY.

 

START-OF-SELECTION.

 CONCATENATE ‘CARRID’ ‘CONNID’ ‘CITYFROM’

            INTO L_S

   SEPARATE BY SPACE.

 CONCATENATE ‘CONNID = ‘ ‘’ ‘0123’ ‘’’’ INTO L_COND.

APPEND COND TO I_COND.

L_TABLE = ‘SPFLI’.

IF <fs> IS ASSIGNED.

 UNASSIGN  <fs>.

 ASSIGN SPFLI TO <fs>.

ELSE.

ASSIGN SPFLI TO <fs>.

ENDIF.

 

SELECT_DATA_TO_WA (L_S) (L_TABLE) <fs> I_COND.