ABAP Select data from SAP table IUUC_S4_REFC_CHC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IUUC_S4_REFC_CHC 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 IUUC_S4_REFC_CHC. 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 IUUC_S4_REFC_CHC 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_IUUC_S4_REFC_CHC TYPE STANDARD TABLE OF IUUC_S4_REFC_CHC,
      WA_IUUC_S4_REFC_CHC TYPE IUUC_S4_REFC_CHC,
      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: <IUUC_S4_REFC_CHC> TYPE IUUC_S4_REFC_CHC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IUUC_S4_REFC_CHC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IUUC_S4_REFC_CHC
  INTO TABLE IT_IUUC_S4_REFC_CHC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IUUC_S4_REFC_CHC
*  INTO TABLE @DATA(IT_IUUC_S4_REFC_CHC2).
*--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_IUUC_S4_REFC_CHC INDEX 1 INTO DATA(WA_IUUC_S4_REFC_CHC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IUUC_S4_REFC_CHC ASSIGNING <IUUC_S4_REFC_CHC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IUUC_S4_REFC_CHC>-MANDT = 1.
<IUUC_S4_REFC_CHC>-ATINN = 1.
<IUUC_S4_REFC_CHC>-ADZHL = 1.
<IUUC_S4_REFC_CHC>-ATTAB = 1.
<IUUC_S4_REFC_CHC>-ATFEL = 1.

ENDLOOP.

LOOP AT IT_IUUC_S4_REFC_CHC INTO WA_IUUC_S4_REFC_CHC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IUUC_S4_REFC_CHC-ATFOR, sy-vline,
  WA_IUUC_S4_REFC_CHC-ATKON, sy-vline,
  WA_IUUC_S4_REFC_CHC-MSEHI, sy-vline,
  WA_IUUC_S4_REFC_CHC-ANZDZ, sy-vline,
  WA_IUUC_S4_REFC_CHC-LKENZ, sy-vline,
  WA_IUUC_S4_REFC_CHC-ATXAC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IUUC_S4_REFC_CHC 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_IUUC_S4_REFC_CHC 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_IUUC_S4_REFC_CHC INTO WA_IUUC_S4_REFC_CHC.


*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_IUUC_S4_REFC_CHC_STR, 
MANDT TYPE STRING,
ATINN TYPE STRING,
ADZHL TYPE STRING,
ATTAB TYPE STRING,
ATFEL TYPE STRING,
ATFOR TYPE STRING,
ATKON TYPE STRING,
MSEHI TYPE STRING,
ANZDZ TYPE STRING,
LKENZ TYPE STRING,
ATXAC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IUUC_S4_REFC_CHC_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_IUUC_S4_REFC_CHC_STR-MANDT sy-vline 
WA_IUUC_S4_REFC_CHC_STR-ATINN sy-vline 
WA_IUUC_S4_REFC_CHC_STR-ADZHL sy-vline 
WA_IUUC_S4_REFC_CHC_STR-ATTAB sy-vline 
WA_IUUC_S4_REFC_CHC_STR-ATFEL sy-vline 
WA_IUUC_S4_REFC_CHC_STR-ATFOR sy-vline 
WA_IUUC_S4_REFC_CHC_STR-ATKON sy-vline 
WA_IUUC_S4_REFC_CHC_STR-MSEHI sy-vline 
WA_IUUC_S4_REFC_CHC_STR-ANZDZ sy-vline 
WA_IUUC_S4_REFC_CHC_STR-LKENZ sy-vline 
WA_IUUC_S4_REFC_CHC_STR-ATXAC sy-vline      INTO ld_text SEPARATED BY SPACE.

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