ABAP Select data from SAP table COMPCOMP into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP COMPCOMP 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 COMPCOMP. 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 COMPCOMP 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_COMPCOMP TYPE STANDARD TABLE OF COMPCOMP,
      WA_COMPCOMP TYPE COMPCOMP,
      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: <COMPCOMP> TYPE COMPCOMP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COMPCOMP
*  INTO TABLE @DATA(IT_COMPCOMP2).
*--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_COMPCOMP INDEX 1 INTO DATA(WA_COMPCOMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COMPCOMP>-LEAD_AUFNR = 1.
<COMPCOMP>-VSNMR = 1.
<COMPCOMP>-AUFPL = 1.
<COMPCOMP>-APLZL = 1.
<COMPCOMP>-RSNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COMPCOMP-RSPOS, sy-vline,
  WA_COMPCOMP-RSART, sy-vline,
  WA_COMPCOMP-XLOEK, sy-vline,
  WA_COMPCOMP-MATNR, sy-vline,
  WA_COMPCOMP-WERKS, sy-vline,
  WA_COMPCOMP-POSNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COMPCOMP 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_COMPCOMP 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_COMPCOMP INTO WA_COMPCOMP.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_COMPCOMP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPCOMP-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_COMPCOMP-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPCOMP-POSNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_COMPCOMP-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPCOMP-STLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_COMPCOMP-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPCOMP-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LTXSP
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_COMPCOMP-LTXSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPCOMP-LTXSP.
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_COMPCOMP_STR, 
LEAD_AUFNR TYPE STRING,
VSNMR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
XLOEK TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
POSNR TYPE STRING,
SCHGT TYPE STRING,
STLTY TYPE STRING,
STLAL TYPE STRING,
STLNR TYPE STRING,
STLKN TYPE STRING,
STVKN TYPE STRING,
RELMNG TYPE STRING,
BDMNG TYPE STRING,
SHKZG TYPE STRING,
MEINS TYPE STRING,
ESMNG TYPE STRING,
FMENG TYPE STRING,
BDART TYPE STRING,
CHARG TYPE STRING,
POTX1 TYPE STRING,
DUMPS TYPE STRING,
DBSKZ TYPE STRING,
AUFST TYPE STRING,
FLGEX TYPE STRING,
MATXT TYPE STRING,
RGEKZ TYPE STRING,
XFIELD TYPE STRING,
ALPGR TYPE STRING,
ALPRF TYPE STRING,
ALPST TYPE STRING,
EWAHR TYPE STRING,
OBJTYPE TYPE STRING,
LGORT TYPE STRING,
LTXSP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COMPCOMP_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_COMPCOMP_STR-LEAD_AUFNR sy-vline 
WA_COMPCOMP_STR-VSNMR sy-vline 
WA_COMPCOMP_STR-AUFPL sy-vline 
WA_COMPCOMP_STR-APLZL sy-vline 
WA_COMPCOMP_STR-RSNUM sy-vline 
WA_COMPCOMP_STR-RSPOS sy-vline 
WA_COMPCOMP_STR-RSART sy-vline 
WA_COMPCOMP_STR-XLOEK sy-vline 
WA_COMPCOMP_STR-MATNR sy-vline 
WA_COMPCOMP_STR-WERKS sy-vline 
WA_COMPCOMP_STR-POSNR sy-vline 
WA_COMPCOMP_STR-SCHGT sy-vline 
WA_COMPCOMP_STR-STLTY sy-vline 
WA_COMPCOMP_STR-STLAL sy-vline 
WA_COMPCOMP_STR-STLNR sy-vline 
WA_COMPCOMP_STR-STLKN sy-vline 
WA_COMPCOMP_STR-STVKN sy-vline 
WA_COMPCOMP_STR-RELMNG sy-vline 
WA_COMPCOMP_STR-BDMNG sy-vline 
WA_COMPCOMP_STR-SHKZG sy-vline 
WA_COMPCOMP_STR-MEINS sy-vline 
WA_COMPCOMP_STR-ESMNG sy-vline 
WA_COMPCOMP_STR-FMENG sy-vline 
WA_COMPCOMP_STR-BDART sy-vline 
WA_COMPCOMP_STR-CHARG sy-vline 
WA_COMPCOMP_STR-POTX1 sy-vline 
WA_COMPCOMP_STR-DUMPS sy-vline 
WA_COMPCOMP_STR-DBSKZ sy-vline 
WA_COMPCOMP_STR-AUFST sy-vline 
WA_COMPCOMP_STR-FLGEX sy-vline 
WA_COMPCOMP_STR-MATXT sy-vline 
WA_COMPCOMP_STR-RGEKZ sy-vline 
WA_COMPCOMP_STR-XFIELD sy-vline 
WA_COMPCOMP_STR-ALPGR sy-vline 
WA_COMPCOMP_STR-ALPRF sy-vline 
WA_COMPCOMP_STR-ALPST sy-vline 
WA_COMPCOMP_STR-EWAHR sy-vline 
WA_COMPCOMP_STR-OBJTYPE sy-vline 
WA_COMPCOMP_STR-LGORT sy-vline 
WA_COMPCOMP_STR-LTXSP sy-vline      INTO ld_text SEPARATED BY SPACE.

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