ABAP Select data from SAP table FISG_LINEITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FISG_LINEITEM table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to FISG_LINEITEM. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the FISG_LINEITEM table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_FISG_LINEITEM TYPE STANDARD TABLE OF FISG_LINEITEM,
      WA_FISG_LINEITEM TYPE FISG_LINEITEM,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <FISG_LINEITEM> TYPE FISG_LINEITEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FISG_LINEITEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FISG_LINEITEM
  INTO TABLE IT_FISG_LINEITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FISG_LINEITEM
*  INTO TABLE @DATA(IT_FISG_LINEITEM2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_FISG_LINEITEM INDEX 1 INTO DATA(WA_FISG_LINEITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FISG_LINEITEM ASSIGNING <FISG_LINEITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FISG_LINEITEM>-BUZEI = 1.
<FISG_LINEITEM>-MWSKZ = 1.
<FISG_LINEITEM>-KOART = 1.
<FISG_LINEITEM>-BUZID = 1.
<FISG_LINEITEM>-UMSKZ = 1.

ENDLOOP.

LOOP AT IT_FISG_LINEITEM INTO WA_FISG_LINEITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FISG_LINEITEM-UMSKS, sy-vline,
  WA_FISG_LINEITEM-SHKZG, sy-vline,
  WA_FISG_LINEITEM-BSCHL, sy-vline,
  WA_FISG_LINEITEM-QSSKZ, sy-vline,
  WA_FISG_LINEITEM-HKONT, sy-vline,
  WA_FISG_LINEITEM-DMBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FISG_LINEITEM you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_FISG_LINEITEM TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_FISG_LINEITEM INTO WA_FISG_LINEITEM.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FISG_LINEITEM-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FISG_LINEITEM-HKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FISG_LINEITEM-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FISG_LINEITEM-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FISG_LINEITEM-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FISG_LINEITEM-WRBTR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FISG_LINEITEM_STR, 
BUZEI TYPE STRING,
MWSKZ TYPE STRING,
KOART TYPE STRING,
BUZID TYPE STRING,
UMSKZ TYPE STRING,
UMSKS TYPE STRING,
SHKZG TYPE STRING,
BSCHL TYPE STRING,
QSSKZ TYPE STRING,
HKONT TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
SGTXT TYPE STRING,
ZLSCH TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
H_WAERS TYPE STRING,
H_HWAER TYPE STRING,
TXDAT_FROM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FISG_LINEITEM_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_FISG_LINEITEM_STR-BUZEI sy-vline 
WA_FISG_LINEITEM_STR-MWSKZ sy-vline 
WA_FISG_LINEITEM_STR-KOART sy-vline 
WA_FISG_LINEITEM_STR-BUZID sy-vline 
WA_FISG_LINEITEM_STR-UMSKZ sy-vline 
WA_FISG_LINEITEM_STR-UMSKS sy-vline 
WA_FISG_LINEITEM_STR-SHKZG sy-vline 
WA_FISG_LINEITEM_STR-BSCHL sy-vline 
WA_FISG_LINEITEM_STR-QSSKZ sy-vline 
WA_FISG_LINEITEM_STR-HKONT sy-vline 
WA_FISG_LINEITEM_STR-DMBTR sy-vline 
WA_FISG_LINEITEM_STR-WRBTR sy-vline 
WA_FISG_LINEITEM_STR-SGTXT sy-vline 
WA_FISG_LINEITEM_STR-ZLSCH sy-vline 
WA_FISG_LINEITEM_STR-HBKID sy-vline 
WA_FISG_LINEITEM_STR-HKTID sy-vline 
WA_FISG_LINEITEM_STR-H_WAERS sy-vline 
WA_FISG_LINEITEM_STR-H_HWAER sy-vline 
WA_FISG_LINEITEM_STR-TXDAT_FROM sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.