ABAP Select data from SAP table WRF_MPA_MARA_STY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_MPA_MARA_STY
*  INTO TABLE @DATA(IT_WRF_MPA_MARA_STY2).
*--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_WRF_MPA_MARA_STY INDEX 1 INTO DATA(WA_WRF_MPA_MARA_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_MPA_MARA_STY>-MATNR = 1.
<WRF_MPA_MARA_STY>-MAKTX = 1.
<WRF_MPA_MARA_STY>-MTART = 1.
<WRF_MPA_MARA_STY>-MATKL = 1.
<WRF_MPA_MARA_STY>-SAISO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_MPA_MARA_STY-SAISJ, sy-vline,
  WA_WRF_MPA_MARA_STY-SATNR, sy-vline,
  WA_WRF_MPA_MARA_STY-ATTYP, sy-vline,
  WA_WRF_MPA_MARA_STY-PMATA, sy-vline,
  WA_WRF_MPA_MARA_STY-SPROF, sy-vline,
  WA_WRF_MPA_MARA_STY-SAITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_MPA_MARA_STY 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_WRF_MPA_MARA_STY 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_WRF_MPA_MARA_STY INTO WA_WRF_MPA_MARA_STY.


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

*Conversion exit GJAHR, internal->external for field SAISJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WRF_MPA_MARA_STY-SAISJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_MPA_MARA_STY-SAISJ.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ATINN, internal->external for field COLOR_ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_WRF_MPA_MARA_STY-COLOR_ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_MPA_MARA_STY-COLOR_ATINN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ATINN, internal->external for field SIZE1_ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_WRF_MPA_MARA_STY-SIZE1_ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_MPA_MARA_STY-SIZE1_ATINN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ATINN, internal->external for field SIZE2_ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_WRF_MPA_MARA_STY-SIZE2_ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_MPA_MARA_STY-SIZE2_ATINN.
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_WRF_MPA_MARA_STY_STR, 
MATNR TYPE STRING,
MAKTX TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
SAISO TYPE STRING,
SAISJ TYPE STRING,
SATNR TYPE STRING,
ATTYP TYPE STRING,
PMATA TYPE STRING,
SPROF TYPE STRING,
SAITY TYPE STRING,
FASHGRD TYPE STRING,
COLOR TYPE STRING,
SIZE1 TYPE STRING,
SIZE2 TYPE STRING,
VA_FLAG TYPE STRING,
HELP_FLAG TYPE STRING,
COLOR_ATINN TYPE STRING,
SIZE1_ATINN TYPE STRING,
SIZE2_ATINN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_MPA_MARA_STY_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_WRF_MPA_MARA_STY_STR-MATNR sy-vline 
WA_WRF_MPA_MARA_STY_STR-MAKTX sy-vline 
WA_WRF_MPA_MARA_STY_STR-MTART sy-vline 
WA_WRF_MPA_MARA_STY_STR-MATKL sy-vline 
WA_WRF_MPA_MARA_STY_STR-SAISO sy-vline 
WA_WRF_MPA_MARA_STY_STR-SAISJ sy-vline 
WA_WRF_MPA_MARA_STY_STR-SATNR sy-vline 
WA_WRF_MPA_MARA_STY_STR-ATTYP sy-vline 
WA_WRF_MPA_MARA_STY_STR-PMATA sy-vline 
WA_WRF_MPA_MARA_STY_STR-SPROF sy-vline 
WA_WRF_MPA_MARA_STY_STR-SAITY sy-vline 
WA_WRF_MPA_MARA_STY_STR-FASHGRD sy-vline 
WA_WRF_MPA_MARA_STY_STR-COLOR sy-vline 
WA_WRF_MPA_MARA_STY_STR-SIZE1 sy-vline 
WA_WRF_MPA_MARA_STY_STR-SIZE2 sy-vline 
WA_WRF_MPA_MARA_STY_STR-VA_FLAG sy-vline 
WA_WRF_MPA_MARA_STY_STR-HELP_FLAG sy-vline 
WA_WRF_MPA_MARA_STY_STR-COLOR_ATINN sy-vline 
WA_WRF_MPA_MARA_STY_STR-SIZE1_ATINN sy-vline 
WA_WRF_MPA_MARA_STY_STR-SIZE2_ATINN sy-vline      INTO ld_text SEPARATED BY SPACE.

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