ABAP Select data from SAP table AEFMS_RE020_MAIN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AEFMS_RE020_MAIN 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 AEFMS_RE020_MAIN. 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 AEFMS_RE020_MAIN 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_AEFMS_RE020_MAIN TYPE STANDARD TABLE OF AEFMS_RE020_MAIN,
      WA_AEFMS_RE020_MAIN TYPE AEFMS_RE020_MAIN,
      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: <AEFMS_RE020_MAIN> TYPE AEFMS_RE020_MAIN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AEFMS_RE020_MAIN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AEFMS_RE020_MAIN
  INTO TABLE IT_AEFMS_RE020_MAIN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AEFMS_RE020_MAIN
*  INTO TABLE @DATA(IT_AEFMS_RE020_MAIN2).
*--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_AEFMS_RE020_MAIN INDEX 1 INTO DATA(WA_AEFMS_RE020_MAIN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AEFMS_RE020_MAIN ASSIGNING <AEFMS_RE020_MAIN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AEFMS_RE020_MAIN>-BDCHP = 1.
<AEFMS_RE020_MAIN>-BDCHPT = 1.
<AEFMS_RE020_MAIN>-PRGRM = 1.
<AEFMS_RE020_MAIN>-PRGRMT = 1.
<AEFMS_RE020_MAIN>-PRGRS = 1.

ENDLOOP.

LOOP AT IT_AEFMS_RE020_MAIN INTO WA_AEFMS_RE020_MAIN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AEFMS_RE020_MAIN-PRGRST, sy-vline,
  WA_AEFMS_RE020_MAIN-PRJCT, sy-vline,
  WA_AEFMS_RE020_MAIN-PRJCTT, sy-vline,
  WA_AEFMS_RE020_MAIN-DPRTM, sy-vline,
  WA_AEFMS_RE020_MAIN-RTCUR, sy-vline,
  WA_AEFMS_RE020_MAIN-ABTOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AEFMS_RE020_MAIN 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_AEFMS_RE020_MAIN 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_AEFMS_RE020_MAIN INTO WA_AEFMS_RE020_MAIN.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_AEFMS_RE020_MAIN_STR, 
BDCHP TYPE STRING,
BDCHPT TYPE STRING,
PRGRM TYPE STRING,
PRGRMT TYPE STRING,
PRGRS TYPE STRING,
PRGRST TYPE STRING,
PRJCT TYPE STRING,
PRJCTT TYPE STRING,
DPRTM TYPE STRING,
RTCUR TYPE STRING,
ABTOR TYPE STRING,
ABTAD TYPE STRING,
APTPY TYPE STRING,
ABTAL TYPE STRING,
AFRBA TYPE STRING,
ABTS1 TYPE STRING,
ABTS2 TYPE STRING,
ABTS3 TYPE STRING,
ABTS4 TYPE STRING,
ABTS5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AEFMS_RE020_MAIN_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_AEFMS_RE020_MAIN_STR-BDCHP sy-vline 
WA_AEFMS_RE020_MAIN_STR-BDCHPT sy-vline 
WA_AEFMS_RE020_MAIN_STR-PRGRM sy-vline 
WA_AEFMS_RE020_MAIN_STR-PRGRMT sy-vline 
WA_AEFMS_RE020_MAIN_STR-PRGRS sy-vline 
WA_AEFMS_RE020_MAIN_STR-PRGRST sy-vline 
WA_AEFMS_RE020_MAIN_STR-PRJCT sy-vline 
WA_AEFMS_RE020_MAIN_STR-PRJCTT sy-vline 
WA_AEFMS_RE020_MAIN_STR-DPRTM sy-vline 
WA_AEFMS_RE020_MAIN_STR-RTCUR sy-vline 
WA_AEFMS_RE020_MAIN_STR-ABTOR sy-vline 
WA_AEFMS_RE020_MAIN_STR-ABTAD sy-vline 
WA_AEFMS_RE020_MAIN_STR-APTPY sy-vline 
WA_AEFMS_RE020_MAIN_STR-ABTAL sy-vline 
WA_AEFMS_RE020_MAIN_STR-AFRBA sy-vline 
WA_AEFMS_RE020_MAIN_STR-ABTS1 sy-vline 
WA_AEFMS_RE020_MAIN_STR-ABTS2 sy-vline 
WA_AEFMS_RE020_MAIN_STR-ABTS3 sy-vline 
WA_AEFMS_RE020_MAIN_STR-ABTS4 sy-vline 
WA_AEFMS_RE020_MAIN_STR-ABTS5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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