ABAP Select data from SAP table WFAS_CDI_EMP_WORKRULES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFAS_CDI_EMP_WORKRULES
*  INTO TABLE @DATA(IT_WFAS_CDI_EMP_WORKRULES2).
*--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_WFAS_CDI_EMP_WORKRULES INDEX 1 INTO DATA(WA_WFAS_CDI_EMP_WORKRULES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFAS_CDI_EMP_WORKRULES>-WORKRULESET_ID = 1.
<WFAS_CDI_EMP_WORKRULES>-MINHRSWEEK = 1.
<WFAS_CDI_EMP_WORKRULES>-MAXHRSWEEK = 1.
<WFAS_CDI_EMP_WORKRULES>-MINHOURSSHIFT = 1.
<WFAS_CDI_EMP_WORKRULES>-MAXHOURSSHIFT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFAS_CDI_EMP_WORKRULES-WKENDMAXHRSSHIFT, sy-vline,
  WA_WFAS_CDI_EMP_WORKRULES-MAXSCHEDDAYSWEEK, sy-vline,
  WA_WFAS_CDI_EMP_WORKRULES-MINTIMBTSHIFTS, sy-vline,
  WA_WFAS_CDI_EMP_WORKRULES-MAXCONSECUTIVEDS, sy-vline,
  WA_WFAS_CDI_EMP_WORKRULES-TWODAYSOFFINROW, sy-vline,
  WA_WFAS_CDI_EMP_WORKRULES-TWODAYSOFFWKEND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFAS_CDI_EMP_WORKRULES 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_WFAS_CDI_EMP_WORKRULES 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_WFAS_CDI_EMP_WORKRULES INTO WA_WFAS_CDI_EMP_WORKRULES.


*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_WFAS_CDI_EMP_WORKRULES_STR, 
WORKRULESET_ID TYPE STRING,
MINHRSWEEK TYPE STRING,
MAXHRSWEEK TYPE STRING,
MINHOURSSHIFT TYPE STRING,
MAXHOURSSHIFT TYPE STRING,
WKENDMAXHRSSHIFT TYPE STRING,
MAXSCHEDDAYSWEEK TYPE STRING,
MINTIMBTSHIFTS TYPE STRING,
MAXCONSECUTIVEDS TYPE STRING,
TWODAYSOFFINROW TYPE STRING,
TWODAYSOFFWKEND TYPE STRING,
ALTWEEKENDSOFF TYPE STRING,
HOLIDAYOFF TYPE STRING,
ALLOWOVERTIME TYPE STRING,
MAXOTDAY TYPE STRING,
MAXOTWEEK TYPE STRING,
SPLIT_SHIFTS TYPE STRING,
MAX_PARTS_DAY TYPE STRING,
MAX_SPLIT_DAYS TYPE STRING,
MIN_HOUR_PART TYPE STRING,
MIN_GAP_PART TYPE STRING,
MAX_GAP_PART TYPE STRING,
ONE_WEEK_REST TYPE STRING,
SPECIAL_DAYP1 TYPE STRING,
SPECIAL_DAYP_M1 TYPE STRING,
SPECIAL_DAYP2 TYPE STRING,
SPECIAL_DAYP_M2 TYPE STRING,
SPECIAL_DAYP3 TYPE STRING,
SPECIAL_DAYP_M3 TYPE STRING,
SPECIAL_DAYP4 TYPE STRING,
SPECIAL_DAYP_M4 TYPE STRING,
SPECIAL_DAYP5 TYPE STRING,
SPECIAL_DAYP_M5 TYPE STRING,
SPECIAL_DAYP6 TYPE STRING,
SPECIAL_DAYP_M6 TYPE STRING,
MIN_TARGET_HRS TYPE STRING,
MAX_TARGET_HRS TYPE STRING,
TARGET_DAYS TYPE STRING,
REMAINING_DAYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFAS_CDI_EMP_WORKRULES_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_WFAS_CDI_EMP_WORKRULES_STR-WORKRULESET_ID sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MINHRSWEEK sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAXHRSWEEK sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MINHOURSSHIFT sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAXHOURSSHIFT sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-WKENDMAXHRSSHIFT sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAXSCHEDDAYSWEEK sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MINTIMBTSHIFTS sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAXCONSECUTIVEDS sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-TWODAYSOFFINROW sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-TWODAYSOFFWKEND sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-ALTWEEKENDSOFF sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-HOLIDAYOFF sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-ALLOWOVERTIME sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAXOTDAY sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAXOTWEEK sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPLIT_SHIFTS sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAX_PARTS_DAY sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAX_SPLIT_DAYS sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MIN_HOUR_PART sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MIN_GAP_PART sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAX_GAP_PART sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-ONE_WEEK_REST sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP1 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP_M1 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP2 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP_M2 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP3 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP_M3 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP4 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP_M4 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP5 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP_M5 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP6 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-SPECIAL_DAYP_M6 sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MIN_TARGET_HRS sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-MAX_TARGET_HRS sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-TARGET_DAYS sy-vline 
WA_WFAS_CDI_EMP_WORKRULES_STR-REMAINING_DAYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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