ABAP Select data from SAP table ISUWA_CAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISUWA_CAL
*  INTO TABLE @DATA(IT_ISUWA_CAL2).
*--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_ISUWA_CAL INDEX 1 INTO DATA(WA_ISUWA_CAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISUWA_CAL>-ECAL = 1.
<ISUWA_CAL>-EWACAL = 1.
<ISUWA_CAL>-MANDT = 1.
<ISUWA_CAL>-WASTE_CAL = 1.
<ISUWA_CAL>-CAL_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISUWA_CAL-CORR_OPT, sy-vline,
  WA_ISUWA_CAL-WASTE_CAL_TXT, sy-vline,
  WA_ISUWA_CAL-ERDAT, sy-vline,
  WA_ISUWA_CAL-ERNAM, sy-vline,
  WA_ISUWA_CAL-AEDAT, sy-vline,
  WA_ISUWA_CAL-AENAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISUWA_CAL 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_ISUWA_CAL 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_ISUWA_CAL INTO WA_ISUWA_CAL.


*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_ISUWA_CAL_STR, 
ECAL TYPE STRING,
EWACAL TYPE STRING,
MANDT TYPE STRING,
WASTE_CAL TYPE STRING,
CAL_ID TYPE STRING,
CORR_OPT TYPE STRING,
WASTE_CAL_TXT TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
EWA_CAL_DATES TYPE STRING,
DB_ECAL TYPE STRING,
EWACAL TYPE STRING,
MANDT TYPE STRING,
WASTE_CAL TYPE STRING,
CAL_ID TYPE STRING,
CORR_OPT TYPE STRING,
WASTE_CAL_TXT TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
EWA_CAL_DATES TYPE STRING,
EWACALD TYPE STRING,
WASTE_CAL TYPE STRING,
HOLIDAY TYPE STRING,
CAL_ID TYPE STRING,
CORR_OPT TYPE STRING,
HOLIDAY_TXT TYPE STRING,
WASTE_CAL_TXT TYPE STRING,
AB TYPE STRING,
BIS TYPE STRING,
CONTR TYPE STRING,
WMODE TYPE STRING,
OPEN_WMODE TYPE STRING,
UPD_ONLINE TYPE STRING,
NO_DIALOG TYPE STRING,
NUM_RANGE TYPE STRING,
NO_CHANGE TYPE STRING,
NO_OTHER TYPE STRING,
NO_EVENT TYPE STRING,
NO_STATISTIC TYPE STRING,
NO_CHANGE_DOC TYPE STRING,
CALLED_BY_IDOC TYPE STRING,
PROPRICE TYPE STRING,
INPERR TYPE STRING,
ENQ_DONE TYPE STRING,
CURFIELD TYPE STRING,
CURLINE TYPE STRING,
CURDYNNR TYPE STRING,
SETCURFIELD TYPE STRING,
SETCURLINE TYPE STRING,
SETCURDYNNR TYPE STRING,
TEXT_CHANGED TYPE STRING,
EXTINTKZ TYPE STRING,
EXIT_TYPE TYPE STRING,
FULLSCREEN TYPE STRING,
SAVE_OKCODE TYPE STRING,
TEILOBJ TYPE STRING,
S_FUBA TYPE STRING,
INPUT_FIELD_OFF TYPE STRING,
NOFULLSCREEN TYPE STRING,
DB_UPDATE TYPE STRING,
CHANGEFLAG TYPE STRING,
WA_ADR_DONE TYPE STRING,
OPEN_DONE TYPE STRING,
IS_CHANGED TYPE STRING,
CAL_KEY TYPE STRING,
DATES_TAB TYPE STRING,
CORR_OPT TYPE STRING,
HOLIDAY TYPE STRING,
HOLIDAY_TXT TYPE STRING,
DATE_NEW TYPE STRING,
WEEKDAY TYPE STRING,
WEEKDAY_NEW TYPE STRING,
MSG TYPE STRING,
MSGID TYPE STRING,
MSGTY TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
IEMSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISUWA_CAL_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_ISUWA_CAL_STR-ECAL sy-vline 
WA_ISUWA_CAL_STR-EWACAL sy-vline 
WA_ISUWA_CAL_STR-MANDT sy-vline 
WA_ISUWA_CAL_STR-WASTE_CAL sy-vline 
WA_ISUWA_CAL_STR-CAL_ID sy-vline 
WA_ISUWA_CAL_STR-CORR_OPT sy-vline 
WA_ISUWA_CAL_STR-WASTE_CAL_TXT sy-vline 
WA_ISUWA_CAL_STR-ERDAT sy-vline 
WA_ISUWA_CAL_STR-ERNAM sy-vline 
WA_ISUWA_CAL_STR-AEDAT sy-vline 
WA_ISUWA_CAL_STR-AENAM sy-vline 
WA_ISUWA_CAL_STR-BEGRU sy-vline 
WA_ISUWA_CAL_STR-LOEVM sy-vline 
WA_ISUWA_CAL_STR-EWA_CAL_DATES sy-vline 
WA_ISUWA_CAL_STR-DB_ECAL sy-vline 
WA_ISUWA_CAL_STR-EWACAL sy-vline 
WA_ISUWA_CAL_STR-MANDT sy-vline 
WA_ISUWA_CAL_STR-WASTE_CAL sy-vline 
WA_ISUWA_CAL_STR-CAL_ID sy-vline 
WA_ISUWA_CAL_STR-CORR_OPT sy-vline 
WA_ISUWA_CAL_STR-WASTE_CAL_TXT sy-vline 
WA_ISUWA_CAL_STR-ERDAT sy-vline 
WA_ISUWA_CAL_STR-ERNAM sy-vline 
WA_ISUWA_CAL_STR-AEDAT sy-vline 
WA_ISUWA_CAL_STR-AENAM sy-vline 
WA_ISUWA_CAL_STR-BEGRU sy-vline 
WA_ISUWA_CAL_STR-LOEVM sy-vline 
WA_ISUWA_CAL_STR-EWA_CAL_DATES sy-vline 
WA_ISUWA_CAL_STR-EWACALD sy-vline 
WA_ISUWA_CAL_STR-WASTE_CAL sy-vline 
WA_ISUWA_CAL_STR-HOLIDAY sy-vline 
WA_ISUWA_CAL_STR-CAL_ID sy-vline 
WA_ISUWA_CAL_STR-CORR_OPT sy-vline 
WA_ISUWA_CAL_STR-HOLIDAY_TXT sy-vline 
WA_ISUWA_CAL_STR-WASTE_CAL_TXT sy-vline 
WA_ISUWA_CAL_STR-AB sy-vline 
WA_ISUWA_CAL_STR-BIS sy-vline 
WA_ISUWA_CAL_STR-CONTR sy-vline 
WA_ISUWA_CAL_STR-WMODE sy-vline 
WA_ISUWA_CAL_STR-OPEN_WMODE sy-vline 
WA_ISUWA_CAL_STR-UPD_ONLINE sy-vline 
WA_ISUWA_CAL_STR-NO_DIALOG sy-vline 
WA_ISUWA_CAL_STR-NUM_RANGE sy-vline 
WA_ISUWA_CAL_STR-NO_CHANGE sy-vline 
WA_ISUWA_CAL_STR-NO_OTHER sy-vline 
WA_ISUWA_CAL_STR-NO_EVENT sy-vline 
WA_ISUWA_CAL_STR-NO_STATISTIC sy-vline 
WA_ISUWA_CAL_STR-NO_CHANGE_DOC sy-vline 
WA_ISUWA_CAL_STR-CALLED_BY_IDOC sy-vline 
WA_ISUWA_CAL_STR-PROPRICE sy-vline 
WA_ISUWA_CAL_STR-INPERR sy-vline 
WA_ISUWA_CAL_STR-ENQ_DONE sy-vline 
WA_ISUWA_CAL_STR-CURFIELD sy-vline 
WA_ISUWA_CAL_STR-CURLINE sy-vline 
WA_ISUWA_CAL_STR-CURDYNNR sy-vline 
WA_ISUWA_CAL_STR-SETCURFIELD sy-vline 
WA_ISUWA_CAL_STR-SETCURLINE sy-vline 
WA_ISUWA_CAL_STR-SETCURDYNNR sy-vline 
WA_ISUWA_CAL_STR-TEXT_CHANGED sy-vline 
WA_ISUWA_CAL_STR-EXTINTKZ sy-vline 
WA_ISUWA_CAL_STR-EXIT_TYPE sy-vline 
WA_ISUWA_CAL_STR-FULLSCREEN sy-vline 
WA_ISUWA_CAL_STR-SAVE_OKCODE sy-vline 
WA_ISUWA_CAL_STR-TEILOBJ sy-vline 
WA_ISUWA_CAL_STR-S_FUBA sy-vline 
WA_ISUWA_CAL_STR-INPUT_FIELD_OFF sy-vline 
WA_ISUWA_CAL_STR-NOFULLSCREEN sy-vline 
WA_ISUWA_CAL_STR-DB_UPDATE sy-vline 
WA_ISUWA_CAL_STR-CHANGEFLAG sy-vline 
WA_ISUWA_CAL_STR-WA_ADR_DONE sy-vline 
WA_ISUWA_CAL_STR-OPEN_DONE sy-vline 
WA_ISUWA_CAL_STR-IS_CHANGED sy-vline 
WA_ISUWA_CAL_STR-CAL_KEY sy-vline 
WA_ISUWA_CAL_STR-DATES_TAB sy-vline 
WA_ISUWA_CAL_STR-CORR_OPT sy-vline 
WA_ISUWA_CAL_STR-HOLIDAY sy-vline 
WA_ISUWA_CAL_STR-HOLIDAY_TXT sy-vline 
WA_ISUWA_CAL_STR-DATE_NEW sy-vline 
WA_ISUWA_CAL_STR-WEEKDAY sy-vline 
WA_ISUWA_CAL_STR-WEEKDAY_NEW sy-vline 
WA_ISUWA_CAL_STR-MSG sy-vline 
WA_ISUWA_CAL_STR-MSGID sy-vline 
WA_ISUWA_CAL_STR-MSGTY sy-vline 
WA_ISUWA_CAL_STR-MSGNO sy-vline 
WA_ISUWA_CAL_STR-MSGV1 sy-vline 
WA_ISUWA_CAL_STR-MSGV2 sy-vline 
WA_ISUWA_CAL_STR-MSGV3 sy-vline 
WA_ISUWA_CAL_STR-MSGV4 sy-vline 
WA_ISUWA_CAL_STR-IEMSG sy-vline      INTO ld_text SEPARATED BY SPACE.

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