ABAP Select data from SAP table WFMCAS_WA_LOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFMCAS_WA_LOC
*  INTO TABLE @DATA(IT_WFMCAS_WA_LOC2).
*--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_WFMCAS_WA_LOC INDEX 1 INTO DATA(WA_WFMCAS_WA_LOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFMCAS_WA_LOC>-MANDT = 1.
<WFMCAS_WA_LOC>-WRKAREA_ID = 1.
<WFMCAS_WA_LOC>-LOCATION_TYPE = 1.
<WFMCAS_WA_LOC>-START_DATE = 1.
<WFMCAS_WA_LOC>-END_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFMCAS_WA_LOC-TEMP_FLAG, sy-vline,
  WA_WFMCAS_WA_LOC-DUR_SETUP, sy-vline,
  WA_WFMCAS_WA_LOC-DUR_UNIT, sy-vline,
  WA_WFMCAS_WA_LOC-DUR_CLOSEOUT, sy-vline,
  WA_WFMCAS_WA_LOC-MAXPEOPLE, sy-vline,
  WA_WFMCAS_WA_LOC-WRKA_HIST_GUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFMCAS_WA_LOC 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_WFMCAS_WA_LOC 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_WFMCAS_WA_LOC INTO WA_WFMCAS_WA_LOC.


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

*Conversion exit CUNIT, internal->external for field DUR_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_WA_LOC-DUR_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_WA_LOC-DUR_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TZTMP, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TZTMP_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_WA_LOC-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_WA_LOC-CREATED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TZTMP, internal->external for field CHANGED_AT
CALL FUNCTION 'CONVERSION_EXIT_TZTMP_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_WA_LOC-CHANGED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_WA_LOC-CHANGED_AT.
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_WFMCAS_WA_LOC_STR, 
MANDT TYPE STRING,
WRKAREA_ID TYPE STRING,
LOCATION_TYPE TYPE STRING,
START_DATE TYPE STRING,
END_DATE TYPE STRING,
TEMP_FLAG TYPE STRING,
DUR_SETUP TYPE STRING,
DUR_UNIT TYPE STRING,
DUR_CLOSEOUT TYPE STRING,
MAXPEOPLE TYPE STRING,
WRKA_HIST_GUID TYPE STRING,
MIN_PEOPLE TYPE STRING,
WRKAREA_TMAP_ID TYPE STRING,
MON_DAYRANK TYPE STRING,
TUE_DAYRANK TYPE STRING,
WED_DAYRANK TYPE STRING,
THU_DAYRANK TYPE STRING,
FRI_DAYRANK TYPE STRING,
SAT_DAYRANK TYPE STRING,
SUN_DAYRANK TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AT TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_AT TYPE STRING,
EXCLFROMINDAYCL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFMCAS_WA_LOC_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_WFMCAS_WA_LOC_STR-MANDT sy-vline 
WA_WFMCAS_WA_LOC_STR-WRKAREA_ID sy-vline 
WA_WFMCAS_WA_LOC_STR-LOCATION_TYPE sy-vline 
WA_WFMCAS_WA_LOC_STR-START_DATE sy-vline 
WA_WFMCAS_WA_LOC_STR-END_DATE sy-vline 
WA_WFMCAS_WA_LOC_STR-TEMP_FLAG sy-vline 
WA_WFMCAS_WA_LOC_STR-DUR_SETUP sy-vline 
WA_WFMCAS_WA_LOC_STR-DUR_UNIT sy-vline 
WA_WFMCAS_WA_LOC_STR-DUR_CLOSEOUT sy-vline 
WA_WFMCAS_WA_LOC_STR-MAXPEOPLE sy-vline 
WA_WFMCAS_WA_LOC_STR-WRKA_HIST_GUID sy-vline 
WA_WFMCAS_WA_LOC_STR-MIN_PEOPLE sy-vline 
WA_WFMCAS_WA_LOC_STR-WRKAREA_TMAP_ID sy-vline 
WA_WFMCAS_WA_LOC_STR-MON_DAYRANK sy-vline 
WA_WFMCAS_WA_LOC_STR-TUE_DAYRANK sy-vline 
WA_WFMCAS_WA_LOC_STR-WED_DAYRANK sy-vline 
WA_WFMCAS_WA_LOC_STR-THU_DAYRANK sy-vline 
WA_WFMCAS_WA_LOC_STR-FRI_DAYRANK sy-vline 
WA_WFMCAS_WA_LOC_STR-SAT_DAYRANK sy-vline 
WA_WFMCAS_WA_LOC_STR-SUN_DAYRANK sy-vline 
WA_WFMCAS_WA_LOC_STR-CREATED_BY sy-vline 
WA_WFMCAS_WA_LOC_STR-CREATED_AT sy-vline 
WA_WFMCAS_WA_LOC_STR-CHANGED_BY sy-vline 
WA_WFMCAS_WA_LOC_STR-CHANGED_AT sy-vline 
WA_WFMCAS_WA_LOC_STR-EXCLFROMINDAYCL sy-vline      INTO ld_text SEPARATED BY SPACE.

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