ABAP Select data from SAP table WFABIWS_WEEKDAYLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFABIWS_WEEKDAYLIST
*  INTO TABLE @DATA(IT_WFABIWS_WEEKDAYLIST2).
*--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_WFABIWS_WEEKDAYLIST INDEX 1 INTO DATA(WA_WFABIWS_WEEKDAYLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFABIWS_WEEKDAYLIST>-DATE1 = 1.
<WFABIWS_WEEKDAYLIST>-DAY1 = 1.
<WFABIWS_WEEKDAYLIST>-DATE2 = 1.
<WFABIWS_WEEKDAYLIST>-DAY2 = 1.
<WFABIWS_WEEKDAYLIST>-DATE3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFABIWS_WEEKDAYLIST-DAY3, sy-vline,
  WA_WFABIWS_WEEKDAYLIST-DATE4, sy-vline,
  WA_WFABIWS_WEEKDAYLIST-DAY4, sy-vline,
  WA_WFABIWS_WEEKDAYLIST-DATE5, sy-vline,
  WA_WFABIWS_WEEKDAYLIST-DAY5, sy-vline,
  WA_WFABIWS_WEEKDAYLIST-DATE6, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFABIWS_WEEKDAYLIST 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_WFABIWS_WEEKDAYLIST 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_WFABIWS_WEEKDAYLIST INTO WA_WFABIWS_WEEKDAYLIST.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WFABIWS_WEEKDAYLIST_STR, 
DATE1 TYPE STRING,
DAY1 TYPE STRING,
DATE2 TYPE STRING,
DAY2 TYPE STRING,
DATE3 TYPE STRING,
DAY3 TYPE STRING,
DATE4 TYPE STRING,
DAY4 TYPE STRING,
DATE5 TYPE STRING,
DAY5 TYPE STRING,
DATE6 TYPE STRING,
DAY6 TYPE STRING,
DATE7 TYPE STRING,
DAY7 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFABIWS_WEEKDAYLIST_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_WFABIWS_WEEKDAYLIST_STR-DATE1 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DAY1 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DATE2 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DAY2 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DATE3 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DAY3 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DATE4 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DAY4 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DATE5 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DAY5 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DATE6 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DAY6 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DATE7 sy-vline 
WA_WFABIWS_WEEKDAYLIST_STR-DAY7 sy-vline      INTO ld_text SEPARATED BY SPACE.

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