ABAP Select data from SAP table BIW_MARA_V into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BIW_MARA_V
*  INTO TABLE @DATA(IT_BIW_MARA_V2).
*--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_BIW_MARA_V INDEX 1 INTO DATA(WA_BIW_MARA_V2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BIW_MARA_V>-MANDT = 1.
<BIW_MARA_V>-MATNR = 1.
<BIW_MARA_V>-MTART = 1.
<BIW_MARA_V>-MATKL = 1.
<BIW_MARA_V>-SPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BIW_MARA_V-PRDHA, sy-vline,
  WA_BIW_MARA_V-GROES, sy-vline,
  WA_BIW_MARA_V-WRKST, sy-vline,
  WA_BIW_MARA_V-NORMT, sy-vline,
  WA_BIW_MARA_V-BRGEW, sy-vline,
  WA_BIW_MARA_V-NTGEW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BIW_MARA_V 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_BIW_MARA_V 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_BIW_MARA_V INTO WA_BIW_MARA_V.


*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_BIW_MARA_V-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_MARA_V-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field VOLEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BIW_MARA_V-VOLEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_MARA_V-VOLEH.
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_BIW_MARA_V_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
SPART TYPE STRING,
PRDHA TYPE STRING,
GROES TYPE STRING,
WRKST TYPE STRING,
NORMT TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BIW_MARA_V_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_BIW_MARA_V_STR-MANDT sy-vline 
WA_BIW_MARA_V_STR-MATNR sy-vline 
WA_BIW_MARA_V_STR-MTART sy-vline 
WA_BIW_MARA_V_STR-MATKL sy-vline 
WA_BIW_MARA_V_STR-SPART sy-vline 
WA_BIW_MARA_V_STR-PRDHA sy-vline 
WA_BIW_MARA_V_STR-GROES sy-vline 
WA_BIW_MARA_V_STR-WRKST sy-vline 
WA_BIW_MARA_V_STR-NORMT sy-vline 
WA_BIW_MARA_V_STR-BRGEW sy-vline 
WA_BIW_MARA_V_STR-NTGEW sy-vline 
WA_BIW_MARA_V_STR-GEWEI sy-vline 
WA_BIW_MARA_V_STR-VOLUM sy-vline 
WA_BIW_MARA_V_STR-VOLEH sy-vline      INTO ld_text SEPARATED BY SPACE.

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