ABAP Select data from SAP table CDGACMPSTNCOMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDGACMPSTNCOMP
*  INTO TABLE @DATA(IT_CDGACMPSTNCOMP2).
*--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_CDGACMPSTNCOMP INDEX 1 INTO DATA(WA_CDGACMPSTNCOMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDGACMPSTNCOMP>-MANDT = 1.
<CDGACMPSTNCOMP>-CHMLCOMPUUID = 1.
<CDGACMPSTNCOMP>-CHMLCOMPOSITIONUUID = 1.
<CDGACMPSTNCOMP>-CHMLCOMPOSITIONRELEASEDUUID = 1.
<CDGACMPSTNCOMP>-CHMLCMPSTNRELDISACTIVEENTITY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDGACMPSTNCOMP-CHMLCMPSTNRELDSTATUS, sy-vline,
  WA_CDGACMPSTNCOMP-CHMLCOMPOSITIONTYPE, sy-vline,
  WA_CDGACMPSTNCOMP-CHMLCOMPOSITIONSTATUS, sy-vline,
  WA_CDGACMPSTNCOMP-CHMLCMPLNCINFOUUID, sy-vline,
  WA_CDGACMPSTNCOMP-SUBSTANCEUUID, sy-vline,
  WA_CDGACMPSTNCOMP-CASNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDGACMPSTNCOMP 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_CDGACMPSTNCOMP 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_CDGACMPSTNCOMP INTO WA_CDGACMPSTNCOMP.


*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 CUNIT, internal->external for field CHMLCOMPQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CDGACMPSTNCOMP-CHMLCOMPQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDGACMPSTNCOMP-CHMLCOMPQTYUNIT.
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_CDGACMPSTNCOMP_STR, 
MANDT TYPE STRING,
CHMLCOMPUUID TYPE STRING,
CHMLCOMPOSITIONUUID TYPE STRING,
CHMLCOMPOSITIONRELEASEDUUID TYPE STRING,
CHMLCMPSTNRELDISACTIVEENTITY TYPE STRING,
CHMLCMPSTNRELDSTATUS TYPE STRING,
CHMLCOMPOSITIONTYPE TYPE STRING,
CHMLCOMPOSITIONSTATUS TYPE STRING,
CHMLCMPLNCINFOUUID TYPE STRING,
SUBSTANCEUUID TYPE STRING,
CASNUMBER TYPE STRING,
CHMLCOMPNAME TYPE STRING,
SUBSTANCETECHNAMEISEXISTING TYPE STRING,
SUBSTANCETECHNAMEISEDITABLE TYPE STRING,
SUBSTANCETECHNAMETEXT TYPE STRING,
CHMLCOMPTYPE TYPE STRING,
CHMLCOMPTYPENAME TYPE STRING,
CHMLCOMPQTY TYPE STRING,
CHMLCOMPQTYASTEXT TYPE STRING,
CHMLCOMPOPERATORLOWERLIMIT TYPE STRING,
CHMLCOMPQTYLOWERLIMITASTEXT TYPE STRING,
CHMLCOMPOPERATORUPPERLIMIT TYPE STRING,
CHMLCOMPQTYUPPERLIMITASTEXT TYPE STRING,
CHMLCOMPQTYUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDGACMPSTNCOMP_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_CDGACMPSTNCOMP_STR-MANDT sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPUUID sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPOSITIONUUID sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPOSITIONRELEASEDUUID sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCMPSTNRELDISACTIVEENTITY sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCMPSTNRELDSTATUS sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPOSITIONTYPE sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPOSITIONSTATUS sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCMPLNCINFOUUID sy-vline 
WA_CDGACMPSTNCOMP_STR-SUBSTANCEUUID sy-vline 
WA_CDGACMPSTNCOMP_STR-CASNUMBER sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPNAME sy-vline 
WA_CDGACMPSTNCOMP_STR-SUBSTANCETECHNAMEISEXISTING sy-vline 
WA_CDGACMPSTNCOMP_STR-SUBSTANCETECHNAMEISEDITABLE sy-vline 
WA_CDGACMPSTNCOMP_STR-SUBSTANCETECHNAMETEXT sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPTYPE sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPTYPENAME sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPQTY sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPQTYASTEXT sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPOPERATORLOWERLIMIT sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPQTYLOWERLIMITASTEXT sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPOPERATORUPPERLIMIT sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPQTYUPPERLIMITASTEXT sy-vline 
WA_CDGACMPSTNCOMP_STR-CHMLCOMPQTYUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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