ABAP Select data from SAP table IDCN_ACCTBLNSTR_SELSCREEN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IDCN_ACCTBLNSTR_SELSCREEN 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_ACCTBLNSTR_SELSCREEN. 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_ACCTBLNSTR_SELSCREEN 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_ACCTBLNSTR_SELSCREEN TYPE STANDARD TABLE OF IDCN_ACCTBLNSTR_SELSCREEN,
      WA_IDCN_ACCTBLNSTR_SELSCREEN TYPE IDCN_ACCTBLNSTR_SELSCREEN,
      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_ACCTBLNSTR_SELSCREEN> TYPE IDCN_ACCTBLNSTR_SELSCREEN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDCN_ACCTBLNSTR_SELSCREEN
*  INTO TABLE @DATA(IT_IDCN_ACCTBLNSTR_SELSCREEN2).
*--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_ACCTBLNSTR_SELSCREEN INDEX 1 INTO DATA(WA_IDCN_ACCTBLNSTR_SELSCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDCN_ACCTBLNSTR_SELSCREEN>-BUKRS = 1.
<IDCN_ACCTBLNSTR_SELSCREEN>-KTOPL = 1.
<IDCN_ACCTBLNSTR_SELSCREEN>-HKONT = 1.
<IDCN_ACCTBLNSTR_SELSCREEN>-TOPACCGROUP = 1.
<IDCN_ACCTBLNSTR_SELSCREEN>-ACCGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDCN_ACCTBLNSTR_SELSCREEN-ACCGROUPDESC, sy-vline,
  WA_IDCN_ACCTBLNSTR_SELSCREEN-RLDNR, sy-vline,
  WA_IDCN_ACCTBLNSTR_SELSCREEN-GJAHR, sy-vline,
  WA_IDCN_ACCTBLNSTR_SELSCREEN-START_MONAT, sy-vline,
  WA_IDCN_ACCTBLNSTR_SELSCREEN-ENDE_MONAT, sy-vline,
  WA_IDCN_ACCTBLNSTR_SELSCREEN-OUTPUT_ALV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDCN_ACCTBLNSTR_SELSCREEN 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_ACCTBLNSTR_SELSCREEN 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_ACCTBLNSTR_SELSCREEN INTO WA_IDCN_ACCTBLNSTR_SELSCREEN.


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

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

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

*Conversion exit SPDEV, internal->external for field PADEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_ACCTBLNSTR_SELSCREEN-PADEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_ACCTBLNSTR_SELSCREEN-PADEST.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit AC172, internal->external for field CREDIT
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_ACCTBLNSTR_SELSCREEN-CREDIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_ACCTBLNSTR_SELSCREEN-CREDIT.
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_ACCTBLNSTR_SELSCREEN_STR, 
BUKRS TYPE STRING,
KTOPL TYPE STRING,
HKONT TYPE STRING,
TOPACCGROUP TYPE STRING,
ACCGROUP TYPE STRING,
ACCGROUPDESC TYPE STRING,
RLDNR TYPE STRING,
GJAHR TYPE STRING,
START_MONAT TYPE STRING,
ENDE_MONAT TYPE STRING,
OUTPUT_ALV TYPE STRING,
BCF_FLAG TYPE STRING,
OUTPUT_PDF TYPE STRING,
OUTPUT_DIRECT TYPE STRING,
PADEST TYPE STRING,
TITLE TYPE STRING,
SHOW_DELETED TYPE STRING,
SAKNR TYPE STRING,
TXT50 TYPE STRING,
WAERS TYPE STRING,
DEBIT TYPE STRING,
CREDIT TYPE STRING,
SHOW_CUMUL TYPE STRING,
OLDTXT_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDCN_ACCTBLNSTR_SELSCREEN_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_ACCTBLNSTR_SELSCREEN_STR-BUKRS sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-KTOPL sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-HKONT sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-TOPACCGROUP sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-ACCGROUP sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-ACCGROUPDESC sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-RLDNR sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-GJAHR sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-START_MONAT sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-ENDE_MONAT sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-OUTPUT_ALV sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-BCF_FLAG sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-OUTPUT_PDF sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-OUTPUT_DIRECT sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-PADEST sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-TITLE sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-SHOW_DELETED sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-SAKNR sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-TXT50 sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-WAERS sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-DEBIT sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-CREDIT sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-SHOW_CUMUL sy-vline 
WA_IDCN_ACCTBLNSTR_SELSCREEN_STR-OLDTXT_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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