ABAP Select data from SAP table OIH_MEPO_TRAN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIH_MEPO_TRAN
*  INTO TABLE @DATA(IT_OIH_MEPO_TRAN2).
*--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_OIH_MEPO_TRAN INDEX 1 INTO DATA(WA_OIH_MEPO_TRAN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIH_MEPO_TRAN>-OITRKNR = 1.
<OIH_MEPO_TRAN>-OITRKJR = 1.
<OIH_MEPO_TRAN>-OIEXTNR = 1.
<OIH_MEPO_TRAN>-OIITMNR = 1.
<OIH_MEPO_TRAN>-OIFTIND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIH_MEPO_TRAN-OIPRIOP, sy-vline,
  WA_OIH_MEPO_TRAN-OITRIND, sy-vline,
  WA_OIH_MEPO_TRAN-OIGHNDL, sy-vline,
  WA_OIH_MEPO_TRAN-OIUMBAR, sy-vline,
  WA_OIH_MEPO_TRAN-BWTAR, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_OIH_MEPO_TRAN 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_OIH_MEPO_TRAN 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_OIH_MEPO_TRAN INTO WA_OIH_MEPO_TRAN.


*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 OITRKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIH_MEPO_TRAN-OITRKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH_MEPO_TRAN-OITRKNR.
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_OIH_MEPO_TRAN_STR, 
OITRKNR TYPE STRING,
OITRKJR TYPE STRING,
OIEXTNR TYPE STRING,
OIITMNR TYPE STRING,
OIFTIND TYPE STRING,
OIPRIOP TYPE STRING,
OITRIND TYPE STRING,
OIGHNDL TYPE STRING,
OIUMBAR TYPE STRING,
BWTAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIH_MEPO_TRAN_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_OIH_MEPO_TRAN_STR-OITRKNR sy-vline 
WA_OIH_MEPO_TRAN_STR-OITRKJR sy-vline 
WA_OIH_MEPO_TRAN_STR-OIEXTNR sy-vline 
WA_OIH_MEPO_TRAN_STR-OIITMNR sy-vline 
WA_OIH_MEPO_TRAN_STR-OIFTIND sy-vline 
WA_OIH_MEPO_TRAN_STR-OIPRIOP sy-vline 
WA_OIH_MEPO_TRAN_STR-OITRIND sy-vline 
WA_OIH_MEPO_TRAN_STR-OIGHNDL sy-vline 
WA_OIH_MEPO_TRAN_STR-OIUMBAR sy-vline 
WA_OIH_MEPO_TRAN_STR-BWTAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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