ABAP Select data from SAP table AAB_VAR_SFIELDS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AAB_VAR_SFIELDS 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 AAB_VAR_SFIELDS. 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 AAB_VAR_SFIELDS 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_AAB_VAR_SFIELDS TYPE STANDARD TABLE OF AAB_VAR_SFIELDS,
      WA_AAB_VAR_SFIELDS TYPE AAB_VAR_SFIELDS,
      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: <AAB_VAR_SFIELDS> TYPE AAB_VAR_SFIELDS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AAB_VAR_SFIELDS
*  INTO TABLE @DATA(IT_AAB_VAR_SFIELDS2).
*--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_AAB_VAR_SFIELDS INDEX 1 INTO DATA(WA_AAB_VAR_SFIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AAB_VAR_SFIELDS>-NAME = 1.
<AAB_VAR_SFIELDS>-DESCRIPT = 1.
<AAB_VAR_SFIELDS>-LOCAL = 1.
<AAB_VAR_SFIELDS>-CREATE_USER = 1.
<AAB_VAR_SFIELDS>-CREATE_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AAB_VAR_SFIELDS-ACT_USER, sy-vline,
  WA_AAB_VAR_SFIELDS-ACT_DATE, sy-vline,
  WA_AAB_VAR_SFIELDS-ACT_TIME, sy-vline,
  WA_AAB_VAR_SFIELDS-DEVCLASS, sy-vline,
  WA_AAB_VAR_SFIELDS-MASTERLANG, sy-vline,
  WA_AAB_VAR_SFIELDS-DEVCLASS_TXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AAB_VAR_SFIELDS 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_AAB_VAR_SFIELDS 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_AAB_VAR_SFIELDS INTO WA_AAB_VAR_SFIELDS.


*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 ISOLA, internal->external for field MASTERLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_AAB_VAR_SFIELDS-MASTERLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AAB_VAR_SFIELDS-MASTERLANG.
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_AAB_VAR_SFIELDS_STR, 
NAME TYPE STRING,
DESCRIPT TYPE STRING,
LOCAL TYPE STRING,
CREATE_USER TYPE STRING,
CREATE_DATE TYPE STRING,
ACT_USER TYPE STRING,
ACT_DATE TYPE STRING,
ACT_TIME TYPE STRING,
DEVCLASS TYPE STRING,
MASTERLANG TYPE STRING,
DEVCLASS_TXT TYPE STRING,
MASTERLANG_TXT TYPE STRING,
COMPONENT TYPE STRING,
COMPONENT_TXT TYPE STRING,
NAME_COPY_FROM TYPE STRING,
LOCAL_COPY_FROM TYPE STRING,
NAME_COPY_TO TYPE STRING,
LOCAL_COPY_TO TYPE STRING,
NAME_SEL TYPE STRING,
LOCAL_SEL TYPE STRING,
RB_ACT1 TYPE STRING,
RB_ACT2 TYPE STRING,
RB_ACT3 TYPE STRING,
PROG TYPE STRING,
CLASS TYPE STRING,
FUGR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AAB_VAR_SFIELDS_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_AAB_VAR_SFIELDS_STR-NAME sy-vline 
WA_AAB_VAR_SFIELDS_STR-DESCRIPT sy-vline 
WA_AAB_VAR_SFIELDS_STR-LOCAL sy-vline 
WA_AAB_VAR_SFIELDS_STR-CREATE_USER sy-vline 
WA_AAB_VAR_SFIELDS_STR-CREATE_DATE sy-vline 
WA_AAB_VAR_SFIELDS_STR-ACT_USER sy-vline 
WA_AAB_VAR_SFIELDS_STR-ACT_DATE sy-vline 
WA_AAB_VAR_SFIELDS_STR-ACT_TIME sy-vline 
WA_AAB_VAR_SFIELDS_STR-DEVCLASS sy-vline 
WA_AAB_VAR_SFIELDS_STR-MASTERLANG sy-vline 
WA_AAB_VAR_SFIELDS_STR-DEVCLASS_TXT sy-vline 
WA_AAB_VAR_SFIELDS_STR-MASTERLANG_TXT sy-vline 
WA_AAB_VAR_SFIELDS_STR-COMPONENT sy-vline 
WA_AAB_VAR_SFIELDS_STR-COMPONENT_TXT sy-vline 
WA_AAB_VAR_SFIELDS_STR-NAME_COPY_FROM sy-vline 
WA_AAB_VAR_SFIELDS_STR-LOCAL_COPY_FROM sy-vline 
WA_AAB_VAR_SFIELDS_STR-NAME_COPY_TO sy-vline 
WA_AAB_VAR_SFIELDS_STR-LOCAL_COPY_TO sy-vline 
WA_AAB_VAR_SFIELDS_STR-NAME_SEL sy-vline 
WA_AAB_VAR_SFIELDS_STR-LOCAL_SEL sy-vline 
WA_AAB_VAR_SFIELDS_STR-RB_ACT1 sy-vline 
WA_AAB_VAR_SFIELDS_STR-RB_ACT2 sy-vline 
WA_AAB_VAR_SFIELDS_STR-RB_ACT3 sy-vline 
WA_AAB_VAR_SFIELDS_STR-PROG sy-vline 
WA_AAB_VAR_SFIELDS_STR-CLASS sy-vline 
WA_AAB_VAR_SFIELDS_STR-FUGR sy-vline      INTO ld_text SEPARATED BY SPACE.

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