ABAP Select data from SAP table BAPIGENFIELDS into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPIGENFIELDS 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 BAPIGENFIELDS. 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 BAPIGENFIELDS 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_BAPIGENFIELDS TYPE STANDARD TABLE OF BAPIGENFIELDS,
      WA_BAPIGENFIELDS TYPE BAPIGENFIELDS,
      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: <BAPIGENFIELDS> TYPE BAPIGENFIELDS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPIGENFIELDS
*  INTO TABLE @DATA(IT_BAPIGENFIELDS2).
*--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_BAPIGENFIELDS INDEX 1 INTO DATA(WA_BAPIGENFIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPIGENFIELDS>-LOGSYSTEM = 1.
<BAPIGENFIELDS>-BUSGROUP = 1.
<BAPIGENFIELDS>-WRITEAPPLLOG = 1.
<BAPIGENFIELDS>-ORDER_TYPE = 1.
<BAPIGENFIELDS>-YES_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPIGENFIELDS-SEL_ROWS, sy-vline,
  WA_BAPIGENFIELDS-EC_APPL, sy-vline,
  WA_BAPIGENFIELDS-DELTAFLAG, sy-vline,
  WA_BAPIGENFIELDS-PEGDIR, sy-vline,
  WA_BAPIGENFIELDS-PEGMETHOD, sy-vline,
  WA_BAPIGENFIELDS-TABIX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPIGENFIELDS 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_BAPIGENFIELDS 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_BAPIGENFIELDS INTO WA_BAPIGENFIELDS.


*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 LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPIGENFIELDS-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIGENFIELDS-LOGSYSTEM.
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_BAPIGENFIELDS_STR, 
LOGSYSTEM TYPE STRING,
BUSGROUP TYPE STRING,
WRITEAPPLLOG TYPE STRING,
ORDER_TYPE TYPE STRING,
YES_NO TYPE STRING,
SEL_ROWS TYPE STRING,
EC_APPL TYPE STRING,
DELTAFLAG TYPE STRING,
PEGDIR TYPE STRING,
PEGMETHOD TYPE STRING,
TABIX TYPE STRING,
START_T TYPE STRING,
END_T TYPE STRING,
TRANSMODE TYPE STRING,
RESID TYPE STRING,
MATID TYPE STRING,
LOCID TYPE STRING,
ORDID TYPE STRING,
COMMCONTROL TYPE STRING,
EXT_NR_FLAG TYPE STRING,
FIX_BLOCK TYPE STRING,
IO_NODE_SEL TYPE STRING,
AUTO_DEL TYPE STRING,
VRSIOEX TYPE STRING,
COMMCTRL2 TYPE STRING,
MODELID TYPE STRING,
NO_CREATE TYPE STRING,
PLAN_USAGE TYPE STRING,
MAX_ROWS TYPE STRING,
TESTRUN TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPIGENFIELDS_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_BAPIGENFIELDS_STR-LOGSYSTEM sy-vline 
WA_BAPIGENFIELDS_STR-BUSGROUP sy-vline 
WA_BAPIGENFIELDS_STR-WRITEAPPLLOG sy-vline 
WA_BAPIGENFIELDS_STR-ORDER_TYPE sy-vline 
WA_BAPIGENFIELDS_STR-YES_NO sy-vline 
WA_BAPIGENFIELDS_STR-SEL_ROWS sy-vline 
WA_BAPIGENFIELDS_STR-EC_APPL sy-vline 
WA_BAPIGENFIELDS_STR-DELTAFLAG sy-vline 
WA_BAPIGENFIELDS_STR-PEGDIR sy-vline 
WA_BAPIGENFIELDS_STR-PEGMETHOD sy-vline 
WA_BAPIGENFIELDS_STR-TABIX sy-vline 
WA_BAPIGENFIELDS_STR-START_T sy-vline 
WA_BAPIGENFIELDS_STR-END_T sy-vline 
WA_BAPIGENFIELDS_STR-TRANSMODE sy-vline 
WA_BAPIGENFIELDS_STR-RESID sy-vline 
WA_BAPIGENFIELDS_STR-MATID sy-vline 
WA_BAPIGENFIELDS_STR-LOCID sy-vline 
WA_BAPIGENFIELDS_STR-ORDID sy-vline 
WA_BAPIGENFIELDS_STR-COMMCONTROL sy-vline 
WA_BAPIGENFIELDS_STR-EXT_NR_FLAG sy-vline 
WA_BAPIGENFIELDS_STR-FIX_BLOCK sy-vline 
WA_BAPIGENFIELDS_STR-IO_NODE_SEL sy-vline 
WA_BAPIGENFIELDS_STR-AUTO_DEL sy-vline 
WA_BAPIGENFIELDS_STR-VRSIOEX sy-vline 
WA_BAPIGENFIELDS_STR-COMMCTRL2 sy-vline 
WA_BAPIGENFIELDS_STR-MODELID sy-vline 
WA_BAPIGENFIELDS_STR-NO_CREATE sy-vline 
WA_BAPIGENFIELDS_STR-PLAN_USAGE sy-vline 
WA_BAPIGENFIELDS_STR-MAX_ROWS sy-vline 
WA_BAPIGENFIELDS_STR-TESTRUN sy-vline 
WA_BAPIGENFIELDS_STR-DATE_FROM sy-vline 
WA_BAPIGENFIELDS_STR-DATE_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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