[ABAP] Daten von interner Tabelle lesen (Index, Key, Feldsymbol)

Typen & Daten

* Zeilentyp der internen Tabelle
TYPES : BEGIN OF ty_s_persons,
          pernr TYPE i,
          name  TYPE string,
          age   TYPE i,
        END OF ty_s_persons.

* Typ: Interne Tabelle mit Primärschlüssel pernr und Sekundärschlüssel persons
TYPES: ty_it_persons TYPE STANDARD TABLE OF ty_s_persons WITH KEY pernr
                                                         WITH NON-UNIQUE SORTED KEY persons COMPONENTS name.

* Daten
DATA(it_persons) = VALUE ty_it_persons(
                                        ( pernr = 1 name = |Udo|    age = 20 )
                                        ( pernr = 2 name = |Heinz|  age = 30 )
                                        ( pernr = 3 name = |Jochen| age = 40 )
                                        ( pernr = 4 name = |Ede|    age = 50 )
                                        ( pernr = 5 name = |Ina|    age = 60 )
                                        ( pernr = 6 name = |Erika|  age = 70 )
                                        ( pernr = 7 name = |Erna|   age = 80 )
                                      ).

Datensatz mit Index 1 auslesen

* table expressions
IF line_exists( it_persons[ 1 ] ).
* Datenstruktur
  DATA(lv_per1) = it_persons[ 1 ].
  WRITE: / lv_per1-pernr, lv_per1-name, lv_per1-age.

* Feldsymbol
  ASSIGN it_persons[ 1 ] TO FIELD-SYMBOL(<p1>).
  IF <p1> IS ASSIGNED.
    WRITE: / <p1>-pernr, <p1>-name, <p1>-age.
  ENDIF.
ENDIF.

* READ TABLE
* Datenstruktur
READ TABLE it_persons INDEX 1 INTO DATA(lv_per2).
IF sy-subrc = 0.
  WRITE: / lv_per2-pernr, lv_per2-name, lv_per2-age.
ENDIF.
* Feldsymbol
READ TABLE it_persons INDEX 1 ASSIGNING FIELD-SYMBOL(<p2>).
IF sy-subrc = 0 AND <p2> IS ASSIGNED.
  WRITE: / <p2>-pernr, <p2>-name, <p2>-age.
ENDIF.

Datensatz mit Primärschlüssel auslesen

* table expressions
IF line_exists( it_persons[ pernr = 2 ] ).
* Datenstruktur
  DATA(lv_per3) = it_persons[ pernr = 2 ].
  WRITE: / lv_per3-pernr, lv_per3-name, lv_per3-age.

* Feldsymbol
  ASSIGN it_persons[ pernr = 2 ] TO FIELD-SYMBOL(<p3>).
  IF <p3> IS ASSIGNED.
    WRITE: / <p3>-pernr, <p3>-name, <p3>-age.
  ENDIF.
ENDIF.

* READ TABLE
* Datenstruktur
READ TABLE it_persons WITH TABLE KEY pernr = 2 INTO DATA(lv_per4).
IF sy-subrc = 0.
  WRITE: / lv_per4-pernr, lv_per4-name, lv_per4-age.
ENDIF.
* Feldsymbol
READ TABLE it_persons WITH TABLE KEY pernr = 2 ASSIGNING FIELD-SYMBOL(<p4>).
IF sy-subrc = 0 AND <p4> IS ASSIGNED.
  WRITE: / <p4>-pernr, <p4>-name, <p4>-age.
ENDIF.

Datensatz mit Sekundärschlüssel auslesen

* table expressions
IF line_exists( it_persons[ KEY persons COMPONENTS name = 'Ina' ] ).
* Datenstruktur
  DATA(lv_per5) = it_persons[ KEY persons COMPONENTS name = 'Ina' ].
  WRITE: / lv_per5-pernr, lv_per5-name, lv_per5-age.

* Feldsymbol
  ASSIGN it_persons[ KEY persons COMPONENTS name = 'Ina' ] TO FIELD-SYMBOL(<p5>).
  IF <p5> IS ASSIGNED.
    WRITE: / <p5>-pernr, <p5>-name, <p5>-age.
  ENDIF.
ENDIF.

* READ TABLE
* Datenstruktur
READ TABLE it_persons WITH KEY persons COMPONENTS name = 'Ina' INTO DATA(lv_per6).
IF sy-subrc = 0.
  WRITE: / lv_per6-pernr, lv_per6-name, lv_per6-age.
ENDIF.
* Feldsymbol
READ TABLE it_persons WITH KEY persons COMPONENTS name = 'Ina' ASSIGNING FIELD-SYMBOL(<p6>).
IF sy-subrc = 0 AND <p6> IS ASSIGNED.
  WRITE: / <p6>-pernr, <p6>-name, <p6>-age.
ENDIF.

[ABAP] Verwendung von Feldsymbolen (Zeiger)

* Zeilentyp
TYPES: BEGIN OF ty_data,
         name TYPE string,
         ort TYPE string,
       END   OF ty_data.

* Tabellentyp
TYPES: ty_it_itab TYPE STANDARD TABLE OF ty_data WITH DEFAULT KEY.

* Tabelle
DATA: it_itab TYPE ty_it_itab.

* Feldsymbol definieren
FIELD-SYMBOLS: <fs_line> TYPE ty_data.

* Beispielausgabe 1 mit Feldsymbol
LOOP AT itab ASSIGNING <fs_line>.
  WRITE: / <fs_line>-name, <fs_line>-ort.
ENDLOOP.

* Beispielausgabe 2 mit Inline-Feldsymbol
LOOP AT itab ASSIGNING FIELD-SYMBOL(<fs_inline>).
  WRITE: / <fs_inline>-name, <fs_inline>-ort.
ENDLOOP.