ABAP Select data from SAP table ISCDPOS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISCDPOS
*  INTO TABLE @DATA(IT_ISCDPOS2).
*--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_ISCDPOS INDEX 1 INTO DATA(WA_ISCDPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISCDPOS>-USERNAME = 1.
<ISCDPOS>-UDATE = 1.
<ISCDPOS>-UTIME = 1.
<ISCDPOS>-TCODE = 1.
<ISCDPOS>-MANDANT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISCDPOS-OBJECTCLAS, sy-vline,
  WA_ISCDPOS-OBJECTID, sy-vline,
  WA_ISCDPOS-CHANGENR, sy-vline,
  WA_ISCDPOS-TABNAME, sy-vline,
  WA_ISCDPOS-TABKEY, sy-vline,
  WA_ISCDPOS-FNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISCDPOS 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_ISCDPOS 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_ISCDPOS INTO WA_ISCDPOS.


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

*Conversion exit ALPHA, internal->external for field CHANGENR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISCDPOS-CHANGENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISCDPOS-CHANGENR.
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_ISCDPOS_STR, 
USERNAME TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
TCODE TYPE STRING,
MANDANT TYPE STRING,
OBJECTCLAS TYPE STRING,
OBJECTID TYPE STRING,
CHANGENR TYPE STRING,
TABNAME TYPE STRING,
TABKEY TYPE STRING,
FNAME TYPE STRING,
CHNGIND TYPE STRING,
TEXT_CASE TYPE STRING,
UNIT_OLD TYPE STRING,
UNIT_NEW TYPE STRING,
CUKY_OLD TYPE STRING,
CUKY_NEW TYPE STRING,
VALUE_NEW TYPE STRING,
VALUE_OLD TYPE STRING,
_DATAAGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISCDPOS_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_ISCDPOS_STR-USERNAME sy-vline 
WA_ISCDPOS_STR-UDATE sy-vline 
WA_ISCDPOS_STR-UTIME sy-vline 
WA_ISCDPOS_STR-TCODE sy-vline 
WA_ISCDPOS_STR-MANDANT sy-vline 
WA_ISCDPOS_STR-OBJECTCLAS sy-vline 
WA_ISCDPOS_STR-OBJECTID sy-vline 
WA_ISCDPOS_STR-CHANGENR sy-vline 
WA_ISCDPOS_STR-TABNAME sy-vline 
WA_ISCDPOS_STR-TABKEY sy-vline 
WA_ISCDPOS_STR-FNAME sy-vline 
WA_ISCDPOS_STR-CHNGIND sy-vline 
WA_ISCDPOS_STR-TEXT_CASE sy-vline 
WA_ISCDPOS_STR-UNIT_OLD sy-vline 
WA_ISCDPOS_STR-UNIT_NEW sy-vline 
WA_ISCDPOS_STR-CUKY_OLD sy-vline 
WA_ISCDPOS_STR-CUKY_NEW sy-vline 
WA_ISCDPOS_STR-VALUE_NEW sy-vline 
WA_ISCDPOS_STR-VALUE_OLD sy-vline 
WA_ISCDPOS_STR-_DATAAGING sy-vline      INTO ld_text SEPARATED BY SPACE.

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