ABAP Select data from SAP table M_OIJFA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM M_OIJFA
*  INTO TABLE @DATA(IT_M_OIJFA2).
*--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_M_OIJFA INDEX 1 INTO DATA(WA_M_OIJFA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<M_OIJFA>-MANDT = 1.
<M_OIJFA>-VBELN = 1.
<M_OIJFA>-POSNR = 1.
<M_OIJFA>-MATNR = 1.
<M_OIJFA>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_M_OIJFA-LGORT, sy-vline,
  WA_M_OIJFA-KUNNR, sy-vline,
  WA_M_OIJFA-NAME1, sy-vline,
  WA_M_OIJFA-VKORG, sy-vline,
  WA_M_OIJFA-AUART, sy-vline,
  WA_M_OIJFA-AUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_M_OIJFA 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_M_OIJFA 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_M_OIJFA INTO WA_M_OIJFA.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_M_OIJFA-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_OIJFA-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_M_OIJFA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_OIJFA-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_M_OIJFA-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_OIJFA-AUART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_M_OIJFA-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_OIJFA-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_M_OIJFA-WKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_OIJFA-WKTNR.
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_M_OIJFA_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
KUNNR TYPE STRING,
NAME1 TYPE STRING,
VKORG TYPE STRING,
AUART TYPE STRING,
AUDAT TYPE STRING,
KWMENG TYPE STRING,
VRKME TYPE STRING,
CHARG TYPE STRING,
BWTAR TYPE STRING,
NETPR TYPE STRING,
WKTNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_M_OIJFA_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_M_OIJFA_STR-MANDT sy-vline 
WA_M_OIJFA_STR-VBELN sy-vline 
WA_M_OIJFA_STR-POSNR sy-vline 
WA_M_OIJFA_STR-MATNR sy-vline 
WA_M_OIJFA_STR-WERKS sy-vline 
WA_M_OIJFA_STR-LGORT sy-vline 
WA_M_OIJFA_STR-KUNNR sy-vline 
WA_M_OIJFA_STR-NAME1 sy-vline 
WA_M_OIJFA_STR-VKORG sy-vline 
WA_M_OIJFA_STR-AUART sy-vline 
WA_M_OIJFA_STR-AUDAT sy-vline 
WA_M_OIJFA_STR-KWMENG sy-vline 
WA_M_OIJFA_STR-VRKME sy-vline 
WA_M_OIJFA_STR-CHARG sy-vline 
WA_M_OIJFA_STR-BWTAR sy-vline 
WA_M_OIJFA_STR-NETPR sy-vline 
WA_M_OIJFA_STR-WKTNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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