ABAP Select data from SAP table FIAPEG_S_SEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIAPEG_S_SEL
*  INTO TABLE @DATA(IT_FIAPEG_S_SEL2).
*--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_FIAPEG_S_SEL INDEX 1 INTO DATA(WA_FIAPEG_S_SEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIAPEG_S_SEL>-BUKRS = 1.
<FIAPEG_S_SEL>-GJAHR = 1.
<FIAPEG_S_SEL>-MONAT = 1.
<FIAPEG_S_SEL>-WHT = 1.
<FIAPEG_S_SEL>-WHN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIAPEG_S_SEL-STM, sy-vline,
  WA_FIAPEG_S_SEL-BELNR, sy-vline,
  WA_FIAPEG_S_SEL-FROM, sy-vline,
  WA_FIAPEG_S_SEL-TO, sy-vline,
  WA_FIAPEG_S_SEL-ALV, sy-vline,
  WA_FIAPEG_S_SEL-PDF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIAPEG_S_SEL 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_FIAPEG_S_SEL 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_FIAPEG_S_SEL INTO WA_FIAPEG_S_SEL.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FIAPEG_S_SEL-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIAPEG_S_SEL-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LAN
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_FIAPEG_S_SEL-LAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIAPEG_S_SEL-LAN.
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_FIAPEG_S_SEL_STR, 
BUKRS TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
WHT TYPE STRING,
WHN TYPE STRING,
STM TYPE STRING,
BELNR TYPE STRING,
FROM TYPE STRING,
TO TYPE STRING,
ALV TYPE STRING,
PDF TYPE STRING,
DIR TYPE STRING,
PRI TYPE STRING,
LEG TYPE STRING,
PAY TYPE STRING,
LAN TYPE STRING,
VER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIAPEG_S_SEL_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_FIAPEG_S_SEL_STR-BUKRS sy-vline 
WA_FIAPEG_S_SEL_STR-GJAHR sy-vline 
WA_FIAPEG_S_SEL_STR-MONAT sy-vline 
WA_FIAPEG_S_SEL_STR-WHT sy-vline 
WA_FIAPEG_S_SEL_STR-WHN sy-vline 
WA_FIAPEG_S_SEL_STR-STM sy-vline 
WA_FIAPEG_S_SEL_STR-BELNR sy-vline 
WA_FIAPEG_S_SEL_STR-FROM sy-vline 
WA_FIAPEG_S_SEL_STR-TO sy-vline 
WA_FIAPEG_S_SEL_STR-ALV sy-vline 
WA_FIAPEG_S_SEL_STR-PDF sy-vline 
WA_FIAPEG_S_SEL_STR-DIR sy-vline 
WA_FIAPEG_S_SEL_STR-PRI sy-vline 
WA_FIAPEG_S_SEL_STR-LEG sy-vline 
WA_FIAPEG_S_SEL_STR-PAY sy-vline 
WA_FIAPEG_S_SEL_STR-LAN sy-vline 
WA_FIAPEG_S_SEL_STR-VER sy-vline      INTO ld_text SEPARATED BY SPACE.

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