ABAP Select data from SAP table IDCN_S_DOC_INFO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IDCN_S_DOC_INFO 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_S_DOC_INFO. 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_S_DOC_INFO 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_S_DOC_INFO TYPE STANDARD TABLE OF IDCN_S_DOC_INFO,
      WA_IDCN_S_DOC_INFO TYPE IDCN_S_DOC_INFO,
      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_S_DOC_INFO> TYPE IDCN_S_DOC_INFO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDCN_S_DOC_INFO
*  INTO TABLE @DATA(IT_IDCN_S_DOC_INFO2).
*--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_S_DOC_INFO INDEX 1 INTO DATA(WA_IDCN_S_DOC_INFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDCN_S_DOC_INFO>-BELNR = 1.
<IDCN_S_DOC_INFO>-GJAHR = 1.
<IDCN_S_DOC_INFO>-MONAT = 1.
<IDCN_S_DOC_INFO>-BUDAT = 1.
<IDCN_S_DOC_INFO>-TITLE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDCN_S_DOC_INFO-TOTAL, sy-vline,
  WA_IDCN_S_DOC_INFO-MANGR, sy-vline,
  WA_IDCN_S_DOC_INFO-APPVR, sy-vline,
  WA_IDCN_S_DOC_INFO-NAME_FIRST, sy-vline,
  WA_IDCN_S_DOC_INFO-NAME_LAST, sy-vline,
  WA_IDCN_S_DOC_INFO-BLART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDCN_S_DOC_INFO 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_S_DOC_INFO 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_S_DOC_INFO INTO WA_IDCN_S_DOC_INFO.


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

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

*Conversion exit ODNIT, internal->external for field XBLNR_ALT
CALL FUNCTION 'CONVERSION_EXIT_ODNIT_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_S_DOC_INFO-XBLNR_ALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_S_DOC_INFO-XBLNR_ALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_S_DOC_INFO-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_S_DOC_INFO-KURSF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field TOTAL_NUM
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_S_DOC_INFO-TOTAL_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_S_DOC_INFO-TOTAL_NUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_S_DOC_INFO-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_S_DOC_INFO-LANGU.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ODNIT, internal->external for field XBLNR_ALT_NO
CALL FUNCTION 'CONVERSION_EXIT_ODNIT_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_S_DOC_INFO-XBLNR_ALT_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_S_DOC_INFO-XBLNR_ALT_NO.
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_S_DOC_INFO_STR, 
BELNR TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
BUDAT TYPE STRING,
TITLE TYPE STRING,
TOTAL TYPE STRING,
MANGR TYPE STRING,
APPVR TYPE STRING,
NAME_FIRST TYPE STRING,
NAME_LAST TYPE STRING,
BLART TYPE STRING,
XBLNR TYPE STRING,
XBLNR_ALT TYPE STRING,
KURSF TYPE STRING,
CURFLG TYPE STRING,
NUMPG TYPE STRING,
TOTAL_NUM TYPE STRING,
TOTAL_CURR TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
LANGU TYPE STRING,
ALTKT TYPE STRING,
FCURRDEC TYPE STRING,
LCURRDEC TYPE STRING,
STBLG TYPE STRING,
STJAH TYPE STRING,
BLDAT TYPE STRING,
XBLNR_ALT_NO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDCN_S_DOC_INFO_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_S_DOC_INFO_STR-BELNR sy-vline 
WA_IDCN_S_DOC_INFO_STR-GJAHR sy-vline 
WA_IDCN_S_DOC_INFO_STR-MONAT sy-vline 
WA_IDCN_S_DOC_INFO_STR-BUDAT sy-vline 
WA_IDCN_S_DOC_INFO_STR-TITLE sy-vline 
WA_IDCN_S_DOC_INFO_STR-TOTAL sy-vline 
WA_IDCN_S_DOC_INFO_STR-MANGR sy-vline 
WA_IDCN_S_DOC_INFO_STR-APPVR sy-vline 
WA_IDCN_S_DOC_INFO_STR-NAME_FIRST sy-vline 
WA_IDCN_S_DOC_INFO_STR-NAME_LAST sy-vline 
WA_IDCN_S_DOC_INFO_STR-BLART sy-vline 
WA_IDCN_S_DOC_INFO_STR-XBLNR sy-vline 
WA_IDCN_S_DOC_INFO_STR-XBLNR_ALT sy-vline 
WA_IDCN_S_DOC_INFO_STR-KURSF sy-vline 
WA_IDCN_S_DOC_INFO_STR-CURFLG sy-vline 
WA_IDCN_S_DOC_INFO_STR-NUMPG sy-vline 
WA_IDCN_S_DOC_INFO_STR-TOTAL_NUM sy-vline 
WA_IDCN_S_DOC_INFO_STR-TOTAL_CURR sy-vline 
WA_IDCN_S_DOC_INFO_STR-BUKRS sy-vline 
WA_IDCN_S_DOC_INFO_STR-BUTXT sy-vline 
WA_IDCN_S_DOC_INFO_STR-LANGU sy-vline 
WA_IDCN_S_DOC_INFO_STR-ALTKT sy-vline 
WA_IDCN_S_DOC_INFO_STR-FCURRDEC sy-vline 
WA_IDCN_S_DOC_INFO_STR-LCURRDEC sy-vline 
WA_IDCN_S_DOC_INFO_STR-STBLG sy-vline 
WA_IDCN_S_DOC_INFO_STR-STJAH sy-vline 
WA_IDCN_S_DOC_INFO_STR-BLDAT sy-vline 
WA_IDCN_S_DOC_INFO_STR-XBLNR_ALT_NO sy-vline      INTO ld_text SEPARATED BY SPACE.

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