ABAP Select data from SAP table EWFCAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWFCAL
*  INTO TABLE @DATA(IT_EWFCAL2).
*--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_EWFCAL INDEX 1 INTO DATA(WA_EWFCAL2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWFCAL-POSNR, sy-vline,
  WA_EWFCAL-DUMMYPROC, sy-vline,
  WA_EWFCAL-INACTIVE, sy-vline,
  WA_EWFCAL-PROCID, sy-vline,
  WA_EWFCAL-FINDOBJTYP, sy-vline,
  WA_EWFCAL-MULTISELCT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWFCAL 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_EWFCAL 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_EWFCAL INTO WA_EWFCAL.


*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 SLOTNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWFCAL-SLOTNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWFCAL-SLOTNAME.
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_EWFCAL_STR, 
MANDT TYPE STRING,
ACTSTAT TYPE STRING,
CONFIG TYPE STRING,
CALLID 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,
END_WITH_CONTACT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWFCAL_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_EWFCAL_STR-MANDT sy-vline 
WA_EWFCAL_STR-ACTSTAT sy-vline 
WA_EWFCAL_STR-CONFIG sy-vline 
WA_EWFCAL_STR-CALLID sy-vline 
WA_EWFCAL_STR-CALLGROUP sy-vline 
WA_EWFCAL_STR-POSNR sy-vline 
WA_EWFCAL_STR-DUMMYPROC sy-vline 
WA_EWFCAL_STR-INACTIVE sy-vline 
WA_EWFCAL_STR-PROCID sy-vline 
WA_EWFCAL_STR-FINDOBJTYP sy-vline 
WA_EWFCAL_STR-MULTISELCT sy-vline 
WA_EWFCAL_STR-ASYNC sy-vline 
WA_EWFCAL_STR-ASYNC_FIX sy-vline 
WA_EWFCAL_STR-PARAMDIA sy-vline 
WA_EWFCAL_STR-PARAMOBJTYP sy-vline 
WA_EWFCAL_STR-PARAMMETH sy-vline 
WA_EWFCAL_STR-ICONNAME sy-vline 
WA_EWFCAL_STR-CICACCESSTYPE sy-vline 
WA_EWFCAL_STR-FKEYFUNC sy-vline 
WA_EWFCAL_STR-LIFETIME sy-vline 
WA_EWFCAL_STR-NEW_MODE sy-vline 
WA_EWFCAL_STR-SLOTNAME sy-vline 
WA_EWFCAL_STR-WEBGUI_MODE sy-vline 
WA_EWFCAL_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.