ABAP Select data from SAP table IDCN_GA_APAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDCN_GA_APAR
*  INTO TABLE @DATA(IT_IDCN_GA_APAR2).
*--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_IDCN_GA_APAR INDEX 1 INTO DATA(WA_IDCN_GA_APAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDCN_GA_APAR>-BUKRS = 1.
<IDCN_GA_APAR>-DTCODE = 1.
<IDCN_GA_APAR>-DTCODE_D = 1.
<IDCN_GA_APAR>-TTCODE = 1.
<IDCN_GA_APAR>-TTCODE_D = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDCN_GA_APAR-KUNNR, sy-vline,
  WA_IDCN_GA_APAR-LIFNR, sy-vline,
  WA_IDCN_GA_APAR-HKONT, sy-vline,
  WA_IDCN_GA_APAR-BLDAT, sy-vline,
  WA_IDCN_GA_APAR-BUDAT, sy-vline,
  WA_IDCN_GA_APAR-GJAHR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDCN_GA_APAR 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_IDCN_GA_APAR 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_IDCN_GA_APAR INTO WA_IDCN_GA_APAR.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_GA_APAR-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_GA_APAR-KUNNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_GA_APAR-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_GA_APAR-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_GA_APAR-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_GA_APAR-WRBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR_TOT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_GA_APAR-DMBTR_TOT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_GA_APAR-DMBTR_TOT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR_TOT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_GA_APAR-WRBTR_TOT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_GA_APAR-WRBTR_TOT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BOENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_GA_APAR-BOENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_GA_APAR-BOENUM.
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_IDCN_GA_APAR_STR, 
BUKRS TYPE STRING,
DTCODE TYPE STRING,
DTCODE_D TYPE STRING,
TTCODE TYPE STRING,
TTCODE_D TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
HKONT TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
BLART TYPE STRING,
BELNR TYPE STRING,
HWAER TYPE STRING,
KURSF TYPE STRING,
SHKZG TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
DMBTR_TOT TYPE STRING,
DOC_CURR TYPE STRING,
WRBTR_TOT TYPE STRING,
SGTXT TYPE STRING,
VALUT TYPE STRING,
AUGBL TYPE STRING,
AUGDT_CLR TYPE STRING,
DTCODE1 TYPE STRING,
TTCODE1 TYPE STRING,
VBELN TYPE STRING,
XBLNR TYPE STRING,
VBELN_VA TYPE STRING,
EBELN TYPE STRING,
ZLSCH TYPE STRING,
AUGDT TYPE STRING,
CLFLAG TYPE STRING,
BOENUM TYPE STRING,
DUMAR TYPE STRING,
DUMAP TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDCN_GA_APAR_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_IDCN_GA_APAR_STR-BUKRS sy-vline 
WA_IDCN_GA_APAR_STR-DTCODE sy-vline 
WA_IDCN_GA_APAR_STR-DTCODE_D sy-vline 
WA_IDCN_GA_APAR_STR-TTCODE sy-vline 
WA_IDCN_GA_APAR_STR-TTCODE_D sy-vline 
WA_IDCN_GA_APAR_STR-KUNNR sy-vline 
WA_IDCN_GA_APAR_STR-LIFNR sy-vline 
WA_IDCN_GA_APAR_STR-HKONT sy-vline 
WA_IDCN_GA_APAR_STR-BLDAT sy-vline 
WA_IDCN_GA_APAR_STR-BUDAT sy-vline 
WA_IDCN_GA_APAR_STR-GJAHR sy-vline 
WA_IDCN_GA_APAR_STR-MONAT sy-vline 
WA_IDCN_GA_APAR_STR-BLART sy-vline 
WA_IDCN_GA_APAR_STR-BELNR sy-vline 
WA_IDCN_GA_APAR_STR-HWAER sy-vline 
WA_IDCN_GA_APAR_STR-KURSF sy-vline 
WA_IDCN_GA_APAR_STR-SHKZG sy-vline 
WA_IDCN_GA_APAR_STR-DMBTR sy-vline 
WA_IDCN_GA_APAR_STR-WRBTR sy-vline 
WA_IDCN_GA_APAR_STR-DMBTR_TOT sy-vline 
WA_IDCN_GA_APAR_STR-DOC_CURR sy-vline 
WA_IDCN_GA_APAR_STR-WRBTR_TOT sy-vline 
WA_IDCN_GA_APAR_STR-SGTXT sy-vline 
WA_IDCN_GA_APAR_STR-VALUT sy-vline 
WA_IDCN_GA_APAR_STR-AUGBL sy-vline 
WA_IDCN_GA_APAR_STR-AUGDT_CLR sy-vline 
WA_IDCN_GA_APAR_STR-DTCODE1 sy-vline 
WA_IDCN_GA_APAR_STR-TTCODE1 sy-vline 
WA_IDCN_GA_APAR_STR-VBELN sy-vline 
WA_IDCN_GA_APAR_STR-XBLNR sy-vline 
WA_IDCN_GA_APAR_STR-VBELN_VA sy-vline 
WA_IDCN_GA_APAR_STR-EBELN sy-vline 
WA_IDCN_GA_APAR_STR-ZLSCH sy-vline 
WA_IDCN_GA_APAR_STR-AUGDT sy-vline 
WA_IDCN_GA_APAR_STR-CLFLAG sy-vline 
WA_IDCN_GA_APAR_STR-BOENUM sy-vline 
WA_IDCN_GA_APAR_STR-DUMAR sy-vline 
WA_IDCN_GA_APAR_STR-DUMAP sy-vline 
WA_IDCN_GA_APAR_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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