ABAP Select data from SAP table E3MARDM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E3MARDM 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 E3MARDM. 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 E3MARDM 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_E3MARDM TYPE STANDARD TABLE OF E3MARDM,
      WA_E3MARDM TYPE E3MARDM,
      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: <E3MARDM> TYPE E3MARDM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E3MARDM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E3MARDM
  INTO TABLE IT_E3MARDM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E3MARDM
*  INTO TABLE @DATA(IT_E3MARDM2).
*--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_E3MARDM INDEX 1 INTO DATA(WA_E3MARDM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E3MARDM ASSIGNING <E3MARDM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E3MARDM>-MSGFN = 1.
<E3MARDM>-LGORT = 1.
<E3MARDM>-PSTAT = 1.
<E3MARDM>-LVORM = 1.
<E3MARDM>-DISKZ = 1.

ENDLOOP.

LOOP AT IT_E3MARDM INTO WA_E3MARDM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E3MARDM-LSOBS, sy-vline,
  WA_E3MARDM-LMINB, sy-vline,
  WA_E3MARDM-LBSTF, sy-vline,
  WA_E3MARDM-HERKL, sy-vline,
  WA_E3MARDM-EXPPG, sy-vline,
  WA_E3MARDM-EXVER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E3MARDM 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_E3MARDM 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_E3MARDM INTO WA_E3MARDM.


*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 PRCTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3MARDM-PRCTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MARDM-PRCTL.
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_E3MARDM_STR, 
MSGFN TYPE STRING,
LGORT TYPE STRING,
PSTAT TYPE STRING,
LVORM TYPE STRING,
DISKZ TYPE STRING,
LSOBS TYPE STRING,
LMINB TYPE STRING,
LBSTF TYPE STRING,
HERKL TYPE STRING,
EXPPG TYPE STRING,
EXVER TYPE STRING,
LGPBE TYPE STRING,
PRCTL TYPE STRING,
LWMKB TYPE STRING,
BSKRF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E3MARDM_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_E3MARDM_STR-MSGFN sy-vline 
WA_E3MARDM_STR-LGORT sy-vline 
WA_E3MARDM_STR-PSTAT sy-vline 
WA_E3MARDM_STR-LVORM sy-vline 
WA_E3MARDM_STR-DISKZ sy-vline 
WA_E3MARDM_STR-LSOBS sy-vline 
WA_E3MARDM_STR-LMINB sy-vline 
WA_E3MARDM_STR-LBSTF sy-vline 
WA_E3MARDM_STR-HERKL sy-vline 
WA_E3MARDM_STR-EXPPG sy-vline 
WA_E3MARDM_STR-EXVER sy-vline 
WA_E3MARDM_STR-LGPBE sy-vline 
WA_E3MARDM_STR-PRCTL sy-vline 
WA_E3MARDM_STR-LWMKB sy-vline 
WA_E3MARDM_STR-BSKRF sy-vline      INTO ld_text SEPARATED BY SPACE.

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