ABAP Select data from SAP table CLOIKAPA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLOIKAPA
*  INTO TABLE @DATA(IT_CLOIKAPA2).
*--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_CLOIKAPA INDEX 1 INTO DATA(WA_CLOIKAPA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLOIKAPA>-MANDT = 1.
<CLOIKAPA>-KAPID = 1.
<CLOIKAPA>-VERSN = 1.
<CLOIKAPA>-DATUB = 1.
<CLOIKAPA>-TAGNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLOIKAPA-SCHNR, sy-vline,
  WA_CLOIKAPA-ANZHL, sy-vline,
  WA_CLOIKAPA-BEGZT, sy-vline,
  WA_CLOIKAPA-EINZT, sy-vline,
  WA_CLOIKAPA-ENDZT, sy-vline,
  WA_CLOIKAPA-FABTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLOIKAPA 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_CLOIKAPA 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_CLOIKAPA INTO WA_CLOIKAPA.


*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_CLOIKAPA_STR, 
MANDT TYPE STRING,
KAPID TYPE STRING,
VERSN TYPE STRING,
DATUB TYPE STRING,
TAGNR TYPE STRING,
SCHNR TYPE STRING,
ANZHL TYPE STRING,
BEGZT TYPE STRING,
EINZT TYPE STRING,
ENDZT TYPE STRING,
FABTG TYPE STRING,
KAPAZ TYPE STRING,
PAUSE TYPE STRING,
NGRAD TYPE STRING,
TPROG TYPE STRING,
WOTAG TYPE STRING,
ANG_MIN TYPE STRING,
ANG_MAX TYPE STRING,
MSGFN TYPE STRING,
XIDOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLOIKAPA_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_CLOIKAPA_STR-MANDT sy-vline 
WA_CLOIKAPA_STR-KAPID sy-vline 
WA_CLOIKAPA_STR-VERSN sy-vline 
WA_CLOIKAPA_STR-DATUB sy-vline 
WA_CLOIKAPA_STR-TAGNR sy-vline 
WA_CLOIKAPA_STR-SCHNR sy-vline 
WA_CLOIKAPA_STR-ANZHL sy-vline 
WA_CLOIKAPA_STR-BEGZT sy-vline 
WA_CLOIKAPA_STR-EINZT sy-vline 
WA_CLOIKAPA_STR-ENDZT sy-vline 
WA_CLOIKAPA_STR-FABTG sy-vline 
WA_CLOIKAPA_STR-KAPAZ sy-vline 
WA_CLOIKAPA_STR-PAUSE sy-vline 
WA_CLOIKAPA_STR-NGRAD sy-vline 
WA_CLOIKAPA_STR-TPROG sy-vline 
WA_CLOIKAPA_STR-WOTAG sy-vline 
WA_CLOIKAPA_STR-ANG_MIN sy-vline 
WA_CLOIKAPA_STR-ANG_MAX sy-vline 
WA_CLOIKAPA_STR-MSGFN sy-vline 
WA_CLOIKAPA_STR-XIDOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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