ABAP Select data from SAP table EHSWAC_EANOCAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EHSWAC_EANOCAT 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_EANOCAT. 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_EANOCAT 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_EANOCAT TYPE STANDARD TABLE OF EHSWAC_EANOCAT,
      WA_EHSWAC_EANOCAT TYPE EHSWAC_EANOCAT,
      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_EANOCAT> TYPE EHSWAC_EANOCAT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHSWAC_EANOCAT
*  INTO TABLE @DATA(IT_EHSWAC_EANOCAT2).
*--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_EANOCAT INDEX 1 INTO DATA(WA_EHSWAC_EANOCAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHSWAC_EANOCAT>-MANDT = 1.
<EHSWAC_EANOCAT>-EANOCAT = 1.
<EHSWAC_EANOCAT>-NUMIN = 1.
<EHSWAC_EANOCAT>-NUMEX = 1.
<EHSWAC_EANOCAT>-EASTSMA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHSWAC_EANOCAT-OPTACT, sy-vline,
  WA_EHSWAC_EANOCAT-FOFACT, sy-vline,
  WA_EHSWAC_EANOCAT-IMACT, sy-vline,
  WA_EHSWAC_EANOCAT-WMACT, sy-vline,
  WA_EHSWAC_EANOCAT-BATACT, sy-vline,
  WA_EHSWAC_EANOCAT-BASUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHSWAC_EANOCAT 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_EANOCAT 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_EANOCAT INTO WA_EHSWAC_EANOCAT.


*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 CUNIT, internal->external for field BASUM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAC_EANOCAT-BASUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAC_EANOCAT-BASUM.
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_EANOCAT_STR, 
MANDT TYPE STRING,
EANOCAT TYPE STRING,
NUMIN TYPE STRING,
NUMEX TYPE STRING,
EASTSMA TYPE STRING,
OPTACT TYPE STRING,
FOFACT TYPE STRING,
IMACT TYPE STRING,
WMACT TYPE STRING,
BATACT TYPE STRING,
BASUM TYPE STRING,
PROGNAM TYPE STRING,
DYNPNR3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHSWAC_EANOCAT_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_EANOCAT_STR-MANDT sy-vline 
WA_EHSWAC_EANOCAT_STR-EANOCAT sy-vline 
WA_EHSWAC_EANOCAT_STR-NUMIN sy-vline 
WA_EHSWAC_EANOCAT_STR-NUMEX sy-vline 
WA_EHSWAC_EANOCAT_STR-EASTSMA sy-vline 
WA_EHSWAC_EANOCAT_STR-OPTACT sy-vline 
WA_EHSWAC_EANOCAT_STR-FOFACT sy-vline 
WA_EHSWAC_EANOCAT_STR-IMACT sy-vline 
WA_EHSWAC_EANOCAT_STR-WMACT sy-vline 
WA_EHSWAC_EANOCAT_STR-BATACT sy-vline 
WA_EHSWAC_EANOCAT_STR-BASUM sy-vline 
WA_EHSWAC_EANOCAT_STR-PROGNAM sy-vline 
WA_EHSWAC_EANOCAT_STR-DYNPNR3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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