ABAP Select data from SAP table GTCN_S_BILL_DETAIL into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GTCN_S_BILL_DETAIL
*  INTO TABLE @DATA(IT_GTCN_S_BILL_DETAIL2).
*--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_GTCN_S_BILL_DETAIL INDEX 1 INTO DATA(WA_GTCN_S_BILL_DETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GTCN_S_BILL_DETAIL>-VBELN = 1.
<GTCN_S_BILL_DETAIL>-VKORG = 1.
<GTCN_S_BILL_DETAIL>-SONAME = 1.
<GTCN_S_BILL_DETAIL>-VTWEG = 1.
<GTCN_S_BILL_DETAIL>-DCNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GTCN_S_BILL_DETAIL-SPART, sy-vline,
  WA_GTCN_S_BILL_DETAIL-DVNAME, sy-vline,
  WA_GTCN_S_BILL_DETAIL-BZIRK, sy-vline,
  WA_GTCN_S_BILL_DETAIL-COMPANY_CODE, sy-vline,
  WA_GTCN_S_BILL_DETAIL-NETWR, sy-vline,
  WA_GTCN_S_BILL_DETAIL-FKDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GTCN_S_BILL_DETAIL 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_GTCN_S_BILL_DETAIL 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_GTCN_S_BILL_DETAIL INTO WA_GTCN_S_BILL_DETAIL.


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

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GTCN_S_BILL_DETAIL-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GTCN_S_BILL_DETAIL-KUNAG.
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_GTCN_S_BILL_DETAIL_STR, 
VBELN TYPE STRING,
VKORG TYPE STRING,
SONAME TYPE STRING,
VTWEG TYPE STRING,
DCNAME TYPE STRING,
SPART TYPE STRING,
DVNAME TYPE STRING,
BZIRK TYPE STRING,
COMPANY_CODE TYPE STRING,
NETWR TYPE STRING,
FKDAT TYPE STRING,
ERNAM TYPE STRING,
XBLNR TYPE STRING,
KUNAG TYPE STRING,
CNAME TYPE STRING,
LAND1 TYPE STRING,
ORT01 TYPE STRING,
STRAS TYPE STRING,
PSTLZ TYPE STRING,
ZLSCHV TYPE STRING,
DZTERM TYPE STRING,
INCO1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GTCN_S_BILL_DETAIL_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_GTCN_S_BILL_DETAIL_STR-VBELN sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-VKORG sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-SONAME sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-VTWEG sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-DCNAME sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-SPART sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-DVNAME sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-BZIRK sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-COMPANY_CODE sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-NETWR sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-FKDAT sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-ERNAM sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-XBLNR sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-KUNAG sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-CNAME sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-LAND1 sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-ORT01 sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-STRAS sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-PSTLZ sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-ZLSCHV sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-DZTERM sy-vline 
WA_GTCN_S_BILL_DETAIL_STR-INCO1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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