ABAP Select data from SAP table EWFCALS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWFCALS
*  INTO TABLE @DATA(IT_EWFCALS2).
*--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_EWFCALS INDEX 1 INTO DATA(WA_EWFCALS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWFCALS>-MANDT = 1.
<EWFCALS>-ACTSTAT = 1.
<EWFCALS>-LANGU = 1.
<EWFCALS>-CONFIG = 1.
<EWFCALS>-CALLID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWFCALS-DESCRIPT, sy-vline,
  WA_EWFCALS-MENUTEXT, sy-vline,
  WA_EWFCALS-CALLGROUP, sy-vline,
  WA_EWFCALS-POSNR, sy-vline,
  WA_EWFCALS-DUMMYPROC, sy-vline,
  WA_EWFCALS-INACTIVE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWFCALS 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_EWFCALS 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_EWFCALS INTO WA_EWFCALS.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EWFCALS-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWFCALS-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SLOTNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWFCALS-SLOTNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWFCALS-SLOTNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWFCALS-LOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWFCALS-LOGICALSYSTEM.
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_EWFCALS_STR, 
MANDT TYPE STRING,
ACTSTAT TYPE STRING,
LANGU TYPE STRING,
CONFIG TYPE STRING,
CALLID TYPE STRING,
DESCRIPT TYPE STRING,
MENUTEXT TYPE STRING,
CALLGROUP TYPE STRING,
POSNR TYPE STRING,
DUMMYPROC TYPE STRING,
INACTIVE TYPE STRING,
PROCID TYPE STRING,
FINDOBJTYP TYPE STRING,
MULTISELCT TYPE STRING,
ASYNC TYPE STRING,
ASYNC_FIX TYPE STRING,
PARAMDIA TYPE STRING,
PARAMOBJTYP TYPE STRING,
PARAMMETH TYPE STRING,
ICONNAME TYPE STRING,
CICACCESSTYPE TYPE STRING,
FKEYFUNC TYPE STRING,
LIFETIME TYPE STRING,
NEW_MODE TYPE STRING,
SLOTNAME TYPE STRING,
WEBGUI_MODE TYPE STRING,
PROCLTYPE TYPE STRING,
OBJTYP TYPE STRING,
METHOD TYPE STRING,
WFTASKID TYPE STRING,
WFTASKTYP TYPE STRING,
FOPROCID TYPE STRING,
CATTID TYPE STRING,
CATTVAR TYPE STRING,
BDC_NAME TYPE STRING,
HTMLCONF TYPE STRING,
CALLED_FROM_HTML TYPE STRING,
CL_METHOD TYPE STRING,
CL_WORKFL TYPE STRING,
CL_FOPROC TYPE STRING,
CL_EDITOR TYPE STRING,
CL_CATT TYPE STRING,
CL_BDC TYPE STRING,
CL_HTMLOP TYPE STRING,
LOGICALSYSTEM TYPE STRING,
CMPWSP TYPE STRING,
CMPCONF TYPE STRING,
CL_CMPWSP TYPE STRING,
NEW_CALLGR TYPE STRING,
NEW_CALLID TYPE STRING,
RB_PD_STD TYPE STRING,
RD_PD_METH TYPE STRING,
END_WITH_CONTACT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWFCALS_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_EWFCALS_STR-MANDT sy-vline 
WA_EWFCALS_STR-ACTSTAT sy-vline 
WA_EWFCALS_STR-LANGU sy-vline 
WA_EWFCALS_STR-CONFIG sy-vline 
WA_EWFCALS_STR-CALLID sy-vline 
WA_EWFCALS_STR-DESCRIPT sy-vline 
WA_EWFCALS_STR-MENUTEXT sy-vline 
WA_EWFCALS_STR-CALLGROUP sy-vline 
WA_EWFCALS_STR-POSNR sy-vline 
WA_EWFCALS_STR-DUMMYPROC sy-vline 
WA_EWFCALS_STR-INACTIVE sy-vline 
WA_EWFCALS_STR-PROCID sy-vline 
WA_EWFCALS_STR-FINDOBJTYP sy-vline 
WA_EWFCALS_STR-MULTISELCT sy-vline 
WA_EWFCALS_STR-ASYNC sy-vline 
WA_EWFCALS_STR-ASYNC_FIX sy-vline 
WA_EWFCALS_STR-PARAMDIA sy-vline 
WA_EWFCALS_STR-PARAMOBJTYP sy-vline 
WA_EWFCALS_STR-PARAMMETH sy-vline 
WA_EWFCALS_STR-ICONNAME sy-vline 
WA_EWFCALS_STR-CICACCESSTYPE sy-vline 
WA_EWFCALS_STR-FKEYFUNC sy-vline 
WA_EWFCALS_STR-LIFETIME sy-vline 
WA_EWFCALS_STR-NEW_MODE sy-vline 
WA_EWFCALS_STR-SLOTNAME sy-vline 
WA_EWFCALS_STR-WEBGUI_MODE sy-vline 
WA_EWFCALS_STR-PROCLTYPE sy-vline 
WA_EWFCALS_STR-OBJTYP sy-vline 
WA_EWFCALS_STR-METHOD sy-vline 
WA_EWFCALS_STR-WFTASKID sy-vline 
WA_EWFCALS_STR-WFTASKTYP sy-vline 
WA_EWFCALS_STR-FOPROCID sy-vline 
WA_EWFCALS_STR-CATTID sy-vline 
WA_EWFCALS_STR-CATTVAR sy-vline 
WA_EWFCALS_STR-BDC_NAME sy-vline 
WA_EWFCALS_STR-HTMLCONF sy-vline 
WA_EWFCALS_STR-CALLED_FROM_HTML sy-vline 
WA_EWFCALS_STR-CL_METHOD sy-vline 
WA_EWFCALS_STR-CL_WORKFL sy-vline 
WA_EWFCALS_STR-CL_FOPROC sy-vline 
WA_EWFCALS_STR-CL_EDITOR sy-vline 
WA_EWFCALS_STR-CL_CATT sy-vline 
WA_EWFCALS_STR-CL_BDC sy-vline 
WA_EWFCALS_STR-CL_HTMLOP sy-vline 
WA_EWFCALS_STR-LOGICALSYSTEM sy-vline 
WA_EWFCALS_STR-CMPWSP sy-vline 
WA_EWFCALS_STR-CMPCONF sy-vline 
WA_EWFCALS_STR-CL_CMPWSP sy-vline 
WA_EWFCALS_STR-NEW_CALLGR sy-vline 
WA_EWFCALS_STR-NEW_CALLID sy-vline 
WA_EWFCALS_STR-RB_PD_STD sy-vline 
WA_EWFCALS_STR-RD_PD_METH sy-vline 
WA_EWFCALS_STR-END_WITH_CONTACT sy-vline      INTO ld_text SEPARATED BY SPACE.

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