ABAP Select data from SAP table KAEP_HCOXXAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KAEP_HCOXXAL
*  INTO TABLE @DATA(IT_KAEP_HCOXXAL2).
*--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_KAEP_HCOXXAL INDEX 1 INTO DATA(WA_KAEP_HCOXXAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KAEP_HCOXXAL>-PERIO = 1.
<KAEP_HCOXXAL>-CYCLE = 1.
<KAEP_HCOXXAL>-SDATE = 1.
<KAEP_HCOXXAL>-GJAHR = 1.
<KAEP_HCOXXAL>-CYCLE_TXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KAEP_HCOXXAL-USERFIELD, sy-vline,
  WA_KAEP_HCOXXAL-BUDAT, sy-vline,
  WA_KAEP_HCOXXAL-KSTAR, sy-vline,
  WA_KAEP_HCOXXAL-KOKRS, sy-vline,
  WA_KAEP_HCOXXAL-KTOPL, sy-vline,
  WA_KAEP_HCOXXAL-KWAER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KAEP_HCOXXAL 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_KAEP_HCOXXAL 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_KAEP_HCOXXAL INTO WA_KAEP_HCOXXAL.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_HCOXXAL-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_HCOXXAL-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_HCOXXAL-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_HCOXXAL-VERSN.
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_KAEP_HCOXXAL_STR, 
PERIO TYPE STRING,
CYCLE TYPE STRING,
SDATE TYPE STRING,
GJAHR TYPE STRING,
CYCLE_TXT TYPE STRING,
USERFIELD TYPE STRING,
BUDAT TYPE STRING,
KSTAR TYPE STRING,
KOKRS TYPE STRING,
KTOPL TYPE STRING,
KWAER TYPE STRING,
VERSN TYPE STRING,
VALUTYP TYPE STRING,
RWAER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KAEP_HCOXXAL_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_KAEP_HCOXXAL_STR-PERIO sy-vline 
WA_KAEP_HCOXXAL_STR-CYCLE sy-vline 
WA_KAEP_HCOXXAL_STR-SDATE sy-vline 
WA_KAEP_HCOXXAL_STR-GJAHR sy-vline 
WA_KAEP_HCOXXAL_STR-CYCLE_TXT sy-vline 
WA_KAEP_HCOXXAL_STR-USERFIELD sy-vline 
WA_KAEP_HCOXXAL_STR-BUDAT sy-vline 
WA_KAEP_HCOXXAL_STR-KSTAR sy-vline 
WA_KAEP_HCOXXAL_STR-KOKRS sy-vline 
WA_KAEP_HCOXXAL_STR-KTOPL sy-vline 
WA_KAEP_HCOXXAL_STR-KWAER sy-vline 
WA_KAEP_HCOXXAL_STR-VERSN sy-vline 
WA_KAEP_HCOXXAL_STR-VALUTYP sy-vline 
WA_KAEP_HCOXXAL_STR-RWAER sy-vline      INTO ld_text SEPARATED BY SPACE.

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