ABAP Select data from SAP table CPS_SEGSEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPS_SEGSEL
*  INTO TABLE @DATA(IT_CPS_SEGSEL2).
*--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_CPS_SEGSEL INDEX 1 INTO DATA(WA_CPS_SEGSEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPS_SEGSEL>-DIRECTION = 1.
<CPS_SEGSEL>-TOP = 1.
<CPS_SEGSEL>-SHOWCP = 1.
<CPS_SEGSEL>-SHOWSEG = 1.
<CPS_SEGSEL>-SHOWCHA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPS_SEGSEL-SHOWCOD, sy-vline,
  WA_CPS_SEGSEL-SOCP, sy-vline,
  WA_CPS_SEGSEL-SOSEG, sy-vline,
  WA_CPS_SEGSEL-SOCHA, sy-vline,
  WA_CPS_SEGSEL-SOCOD, sy-vline,
  WA_CPS_SEGSEL-SOMBL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPS_SEGSEL 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_CPS_SEGSEL 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_CPS_SEGSEL INTO WA_CPS_SEGSEL.


*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_CPS_SEGSEL_STR, 
DIRECTION TYPE STRING,
TOP TYPE STRING,
SHOWCP TYPE STRING,
SHOWSEG TYPE STRING,
SHOWCHA TYPE STRING,
SHOWCOD TYPE STRING,
SOCP TYPE STRING,
SOSEG TYPE STRING,
SOCHA TYPE STRING,
SOCOD TYPE STRING,
SOMBL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPS_SEGSEL_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_CPS_SEGSEL_STR-DIRECTION sy-vline 
WA_CPS_SEGSEL_STR-TOP sy-vline 
WA_CPS_SEGSEL_STR-SHOWCP sy-vline 
WA_CPS_SEGSEL_STR-SHOWSEG sy-vline 
WA_CPS_SEGSEL_STR-SHOWCHA sy-vline 
WA_CPS_SEGSEL_STR-SHOWCOD sy-vline 
WA_CPS_SEGSEL_STR-SOCP sy-vline 
WA_CPS_SEGSEL_STR-SOSEG sy-vline 
WA_CPS_SEGSEL_STR-SOCHA sy-vline 
WA_CPS_SEGSEL_STR-SOCOD sy-vline 
WA_CPS_SEGSEL_STR-SOMBL sy-vline      INTO ld_text SEPARATED BY SPACE.

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