ABAP Select data from SAP table EHSWAC_MNCAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHSWAC_MNCAT
*  INTO TABLE @DATA(IT_EHSWAC_MNCAT2).
*--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_EHSWAC_MNCAT INDEX 1 INTO DATA(WA_EHSWAC_MNCAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHSWAC_MNCAT>-MANDT = 1.
<EHSWAC_MNCAT>-MNCAT = 1.
<EHSWAC_MNCAT>-MNINOINT = 1.
<EHSWAC_MNCAT>-MNINOEXT = 1.
<EHSWAC_MNCAT>-MNCATP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHSWAC_MNCAT-MNDATREC, sy-vline,
  WA_EHSWAC_MNCAT-MNSTSMA, sy-vline,
  WA_EHSWAC_MNCAT-MNRVLIDCTRY, sy-vline,
  WA_EHSWAC_MNCAT-MNNORGECTRYEXT, sy-vline,
  WA_EHSWAC_MNCAT-MNNORGECTRYINT, sy-vline,
  WA_EHSWAC_MNCAT-MNNOPRECTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHSWAC_MNCAT 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_EHSWAC_MNCAT 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_EHSWAC_MNCAT INTO WA_EHSWAC_MNCAT.


*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 CHRID, internal->external for field MNLDEPID
CALL FUNCTION 'CONVERSION_EXIT_CHRID_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAC_MNCAT-MNLDEPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAC_MNCAT-MNLDEPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MNQUANT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAC_MNCAT-MNQUANT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAC_MNCAT-MNQUANT.
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_EHSWAC_MNCAT_STR, 
MANDT TYPE STRING,
MNCAT TYPE STRING,
MNINOINT TYPE STRING,
MNINOEXT TYPE STRING,
MNCATP TYPE STRING,
MNDATREC TYPE STRING,
MNSTSMA TYPE STRING,
MNRVLIDCTRY TYPE STRING,
MNNORGECTRYEXT TYPE STRING,
MNNORGECTRYINT TYPE STRING,
MNNOPRECTRY TYPE STRING,
MNNORGESTEXT TYPE STRING,
MNORGESTINT TYPE STRING,
MNNOPRESTATE TYPE STRING,
MNPBO TYPE STRING,
MNPAI TYPE STRING,
DYNPNR TYPE STRING,
DYNPNR2 TYPE STRING,
PROGNAME TYPE STRING,
MNLDEPID TYPE STRING,
MNDEFPAR TYPE STRING,
MNQUANT TYPE STRING,
MNSTOREROLE TYPE STRING,
MNCHKWAKEY TYPE STRING,
MNCHKMATKEY TYPE STRING,
MNMATAUTO TYPE STRING,
MNSGLCODE TYPE STRING,
MNGETCODES TYPE STRING,
PARTNER4APPROVAL TYPE STRING,
MNSETDATE TYPE STRING,
MNPRNID TYPE STRING,
MNPRNQINT TYPE STRING,
MNAUTHID TYPE STRING,
NEEDAPPROVAL TYPE STRING,
NEEDDISWAY TYPE STRING,
NEEDBPWASTE TYPE STRING,
MNCHKWST TYPE STRING,
MNCHKCODE TYPE STRING,
MNMKTOT TYPE STRING,
MNDIVTOT TYPE STRING,
MNAPPMAT TYPE STRING,
MNMAXLENGTH TYPE STRING,
MNMAXLENGSTATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHSWAC_MNCAT_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_EHSWAC_MNCAT_STR-MANDT sy-vline 
WA_EHSWAC_MNCAT_STR-MNCAT sy-vline 
WA_EHSWAC_MNCAT_STR-MNINOINT sy-vline 
WA_EHSWAC_MNCAT_STR-MNINOEXT sy-vline 
WA_EHSWAC_MNCAT_STR-MNCATP sy-vline 
WA_EHSWAC_MNCAT_STR-MNDATREC sy-vline 
WA_EHSWAC_MNCAT_STR-MNSTSMA sy-vline 
WA_EHSWAC_MNCAT_STR-MNRVLIDCTRY sy-vline 
WA_EHSWAC_MNCAT_STR-MNNORGECTRYEXT sy-vline 
WA_EHSWAC_MNCAT_STR-MNNORGECTRYINT sy-vline 
WA_EHSWAC_MNCAT_STR-MNNOPRECTRY sy-vline 
WA_EHSWAC_MNCAT_STR-MNNORGESTEXT sy-vline 
WA_EHSWAC_MNCAT_STR-MNORGESTINT sy-vline 
WA_EHSWAC_MNCAT_STR-MNNOPRESTATE sy-vline 
WA_EHSWAC_MNCAT_STR-MNPBO sy-vline 
WA_EHSWAC_MNCAT_STR-MNPAI sy-vline 
WA_EHSWAC_MNCAT_STR-DYNPNR sy-vline 
WA_EHSWAC_MNCAT_STR-DYNPNR2 sy-vline 
WA_EHSWAC_MNCAT_STR-PROGNAME sy-vline 
WA_EHSWAC_MNCAT_STR-MNLDEPID sy-vline 
WA_EHSWAC_MNCAT_STR-MNDEFPAR sy-vline 
WA_EHSWAC_MNCAT_STR-MNQUANT sy-vline 
WA_EHSWAC_MNCAT_STR-MNSTOREROLE sy-vline 
WA_EHSWAC_MNCAT_STR-MNCHKWAKEY sy-vline 
WA_EHSWAC_MNCAT_STR-MNCHKMATKEY sy-vline 
WA_EHSWAC_MNCAT_STR-MNMATAUTO sy-vline 
WA_EHSWAC_MNCAT_STR-MNSGLCODE sy-vline 
WA_EHSWAC_MNCAT_STR-MNGETCODES sy-vline 
WA_EHSWAC_MNCAT_STR-PARTNER4APPROVAL sy-vline 
WA_EHSWAC_MNCAT_STR-MNSETDATE sy-vline 
WA_EHSWAC_MNCAT_STR-MNPRNID sy-vline 
WA_EHSWAC_MNCAT_STR-MNPRNQINT sy-vline 
WA_EHSWAC_MNCAT_STR-MNAUTHID sy-vline 
WA_EHSWAC_MNCAT_STR-NEEDAPPROVAL sy-vline 
WA_EHSWAC_MNCAT_STR-NEEDDISWAY sy-vline 
WA_EHSWAC_MNCAT_STR-NEEDBPWASTE sy-vline 
WA_EHSWAC_MNCAT_STR-MNCHKWST sy-vline 
WA_EHSWAC_MNCAT_STR-MNCHKCODE sy-vline 
WA_EHSWAC_MNCAT_STR-MNMKTOT sy-vline 
WA_EHSWAC_MNCAT_STR-MNDIVTOT sy-vline 
WA_EHSWAC_MNCAT_STR-MNAPPMAT sy-vline 
WA_EHSWAC_MNCAT_STR-MNMAXLENGTH sy-vline 
WA_EHSWAC_MNCAT_STR-MNMAXLENGSTATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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