ABAP Select data from SAP table MASEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MASEL
*  INTO TABLE @DATA(IT_MASEL2).
*--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_MASEL INDEX 1 INTO DATA(WA_MASEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MASEL>-ALAUM = 1.
<MASEL>-NEAUM = 1.
<MASEL>-OLAUM = 1.
<MASEL>-SELUE = 1.
<MASEL>-SELAU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MASEL-SELAB, sy-vline,
  WA_MASEL-SELDA, sy-vline,
  WA_MASEL-SABAL, sy-vline,
  WA_MASEL-NAVIG, sy-vline,
  WA_MASEL-SABKD, sy-vline,
  WA_MASEL-KDANR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MASEL 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_MASEL 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_MASEL INTO WA_MASEL.


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

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MASEL-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MASEL-PSPEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PRANR
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_MASEL-PRANR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MASEL-PRANR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MASEL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MASEL-MATNR.
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_MASEL_STR, 
ALAUM TYPE STRING,
NEAUM TYPE STRING,
OLAUM TYPE STRING,
SELUE TYPE STRING,
SELAU TYPE STRING,
SELAB TYPE STRING,
SELDA TYPE STRING,
SABAL TYPE STRING,
NAVIG TYPE STRING,
SABKD TYPE STRING,
KDANR TYPE STRING,
KDAPS TYPE STRING,
SABPR TYPE STRING,
PSPEL TYPE STRING,
PRANR TYPE STRING,
DAT00 TYPE STRING,
DAT01 TYPE STRING,
VLINE TYPE STRING,
BLINE TYPE STRING,
XLINE TYPE STRING,
YLINE TYPE STRING,
SABLC TYPE STRING,
SABLG TYPE STRING,
SABCH TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
RWDA1 TYPE STRING,
BERW1 TYPE STRING,
RWDA2 TYPE STRING,
BERW2 TYPE STRING,
RWDA3 TYPE STRING,
BERW3 TYPE STRING,
DSDAB TYPE STRING,
SLKZ1 TYPE STRING,
SLKZ2 TYPE STRING,
SLKZ3 TYPE STRING,
SLKZ4 TYPE STRING,
SLKZ5 TYPE STRING,
SLKZ6 TYPE STRING,
SLKZ7 TYPE STRING,
SLKZ8 TYPE STRING,
BDBKZ TYPE STRING,
NBEKZ TYPE STRING,
NAUKZ TYPE STRING,
AMSLR TYPE STRING,
AMSLY TYPE STRING,
AMSLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MASEL_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_MASEL_STR-ALAUM sy-vline 
WA_MASEL_STR-NEAUM sy-vline 
WA_MASEL_STR-OLAUM sy-vline 
WA_MASEL_STR-SELUE sy-vline 
WA_MASEL_STR-SELAU sy-vline 
WA_MASEL_STR-SELAB sy-vline 
WA_MASEL_STR-SELDA sy-vline 
WA_MASEL_STR-SABAL sy-vline 
WA_MASEL_STR-NAVIG sy-vline 
WA_MASEL_STR-SABKD sy-vline 
WA_MASEL_STR-KDANR sy-vline 
WA_MASEL_STR-KDAPS sy-vline 
WA_MASEL_STR-SABPR sy-vline 
WA_MASEL_STR-PSPEL sy-vline 
WA_MASEL_STR-PRANR sy-vline 
WA_MASEL_STR-DAT00 sy-vline 
WA_MASEL_STR-DAT01 sy-vline 
WA_MASEL_STR-VLINE sy-vline 
WA_MASEL_STR-BLINE sy-vline 
WA_MASEL_STR-XLINE sy-vline 
WA_MASEL_STR-YLINE sy-vline 
WA_MASEL_STR-SABLC sy-vline 
WA_MASEL_STR-SABLG sy-vline 
WA_MASEL_STR-SABCH sy-vline 
WA_MASEL_STR-MATNR sy-vline 
WA_MASEL_STR-MAKTX sy-vline 
WA_MASEL_STR-RWDA1 sy-vline 
WA_MASEL_STR-BERW1 sy-vline 
WA_MASEL_STR-RWDA2 sy-vline 
WA_MASEL_STR-BERW2 sy-vline 
WA_MASEL_STR-RWDA3 sy-vline 
WA_MASEL_STR-BERW3 sy-vline 
WA_MASEL_STR-DSDAB sy-vline 
WA_MASEL_STR-SLKZ1 sy-vline 
WA_MASEL_STR-SLKZ2 sy-vline 
WA_MASEL_STR-SLKZ3 sy-vline 
WA_MASEL_STR-SLKZ4 sy-vline 
WA_MASEL_STR-SLKZ5 sy-vline 
WA_MASEL_STR-SLKZ6 sy-vline 
WA_MASEL_STR-SLKZ7 sy-vline 
WA_MASEL_STR-SLKZ8 sy-vline 
WA_MASEL_STR-BDBKZ sy-vline 
WA_MASEL_STR-NBEKZ sy-vline 
WA_MASEL_STR-NAUKZ sy-vline 
WA_MASEL_STR-AMSLR sy-vline 
WA_MASEL_STR-AMSLY sy-vline 
WA_MASEL_STR-AMSLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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