ABAP Select data from SAP table GOCOMP_TV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GOCOMP_TV
*  INTO TABLE @DATA(IT_GOCOMP_TV2).
*--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_GOCOMP_TV INDEX 1 INTO DATA(WA_GOCOMP_TV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GOCOMP_TV>-EBELN = 1.
<GOCOMP_TV>-EBELP = 1.
<GOCOMP_TV>-GJAHR = 1.
<GOCOMP_TV>-BELNR = 1.
<GOCOMP_TV>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GOCOMP_TV-LINE_ID, sy-vline,
  WA_GOCOMP_TV-MATNR, sy-vline,
  WA_GOCOMP_TV-WERKS, sy-vline,
  WA_GOCOMP_TV-LAGME, sy-vline,
  WA_GOCOMP_TV-ERFME, sy-vline,
  WA_GOCOMP_TV-BDMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GOCOMP_TV 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_GOCOMP_TV 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_GOCOMP_TV INTO WA_GOCOMP_TV.


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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field /CWM/ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_GOCOMP_TV-/CWM/ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GOCOMP_TV-/CWM/ERFME.
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_GOCOMP_TV_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
LINE_ID TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LAGME TYPE STRING,
ERFME TYPE STRING,
BDMNG TYPE STRING,
ERFMG TYPE STRING,
WAMNG TYPE STRING,
WAWRT TYPE STRING,
SHKZG TYPE STRING,
SOBKZ TYPE STRING,
LGPRO TYPE STRING,
CHARG TYPE STRING,
/CWM/ERFMG TYPE STRING,
/CWM/ERFME TYPE STRING,
/CWM/TY2TQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GOCOMP_TV_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_GOCOMP_TV_STR-EBELN sy-vline 
WA_GOCOMP_TV_STR-EBELP sy-vline 
WA_GOCOMP_TV_STR-GJAHR sy-vline 
WA_GOCOMP_TV_STR-BELNR sy-vline 
WA_GOCOMP_TV_STR-BUZEI sy-vline 
WA_GOCOMP_TV_STR-LINE_ID sy-vline 
WA_GOCOMP_TV_STR-MATNR sy-vline 
WA_GOCOMP_TV_STR-WERKS sy-vline 
WA_GOCOMP_TV_STR-LAGME sy-vline 
WA_GOCOMP_TV_STR-ERFME sy-vline 
WA_GOCOMP_TV_STR-BDMNG sy-vline 
WA_GOCOMP_TV_STR-ERFMG sy-vline 
WA_GOCOMP_TV_STR-WAMNG sy-vline 
WA_GOCOMP_TV_STR-WAWRT sy-vline 
WA_GOCOMP_TV_STR-SHKZG sy-vline 
WA_GOCOMP_TV_STR-SOBKZ sy-vline 
WA_GOCOMP_TV_STR-LGPRO sy-vline 
WA_GOCOMP_TV_STR-CHARG sy-vline 
WA_GOCOMP_TV_STR-/CWM/ERFMG sy-vline 
WA_GOCOMP_TV_STR-/CWM/ERFME sy-vline 
WA_GOCOMP_TV_STR-/CWM/TY2TQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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