ABAP Select data from SAP table AEFMS_0820_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_0820_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_0820_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_0820_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_0820_MAIN TYPE STANDARD TABLE OF AEFMS_0820_MAIN,
      WA_AEFMS_0820_MAIN TYPE AEFMS_0820_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_0820_MAIN> TYPE AEFMS_0820_MAIN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AEFMS_0820_MAIN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AEFMS_0820_MAIN
  INTO TABLE IT_AEFMS_0820_MAIN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AEFMS_0820_MAIN
*  INTO TABLE @DATA(IT_AEFMS_0820_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_0820_MAIN INDEX 1 INTO DATA(WA_AEFMS_0820_MAIN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AEFMS_0820_MAIN ASSIGNING <AEFMS_0820_MAIN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AEFMS_0820_MAIN>-FICTR = 1.
<AEFMS_0820_MAIN>-FICTRT = 1.
<AEFMS_0820_MAIN>-CMIT = 1.
<AEFMS_0820_MAIN>-CMITT = 1.
<AEFMS_0820_MAIN>-PRGRM = 1.

ENDLOOP.

LOOP AT IT_AEFMS_0820_MAIN INTO WA_AEFMS_0820_MAIN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AEFMS_0820_MAIN-PRGRMT, sy-vline,
  WA_AEFMS_0820_MAIN-PRGRS, sy-vline,
  WA_AEFMS_0820_MAIN-PRGRST, sy-vline,
  WA_AEFMS_0820_MAIN-TEXT50, sy-vline,
  WA_AEFMS_0820_MAIN-BUDSEND, sy-vline,
  WA_AEFMS_0820_MAIN-BUDRECV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AEFMS_0820_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_0820_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_0820_MAIN INTO WA_AEFMS_0820_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.

*Conversion exit FMCIL, internal->external for field CMIT
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_AEFMS_0820_MAIN-CMIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AEFMS_0820_MAIN-CMIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AEFMS_0820_MAIN-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AEFMS_0820_MAIN-DOCNR.
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_AEFMS_0820_MAIN_STR, 
FICTR TYPE STRING,
FICTRT TYPE STRING,
CMIT TYPE STRING,
CMITT TYPE STRING,
PRGRM TYPE STRING,
PRGRMT TYPE STRING,
PRGRS TYPE STRING,
PRGRST TYPE STRING,
TEXT50 TYPE STRING,
BUDSEND TYPE STRING,
BUDRECV TYPE STRING,
DOCNR TYPE STRING,
DOCDATE TYPE STRING,
XBLNR TYPE STRING,
RTCUR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AEFMS_0820_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_0820_MAIN_STR-FICTR sy-vline 
WA_AEFMS_0820_MAIN_STR-FICTRT sy-vline 
WA_AEFMS_0820_MAIN_STR-CMIT sy-vline 
WA_AEFMS_0820_MAIN_STR-CMITT sy-vline 
WA_AEFMS_0820_MAIN_STR-PRGRM sy-vline 
WA_AEFMS_0820_MAIN_STR-PRGRMT sy-vline 
WA_AEFMS_0820_MAIN_STR-PRGRS sy-vline 
WA_AEFMS_0820_MAIN_STR-PRGRST sy-vline 
WA_AEFMS_0820_MAIN_STR-TEXT50 sy-vline 
WA_AEFMS_0820_MAIN_STR-BUDSEND sy-vline 
WA_AEFMS_0820_MAIN_STR-BUDRECV sy-vline 
WA_AEFMS_0820_MAIN_STR-DOCNR sy-vline 
WA_AEFMS_0820_MAIN_STR-DOCDATE sy-vline 
WA_AEFMS_0820_MAIN_STR-XBLNR sy-vline 
WA_AEFMS_0820_MAIN_STR-RTCUR sy-vline      INTO ld_text SEPARATED BY SPACE.

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