ABAP Select data from SAP table GHO_S_NW_MODELING_SRC_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GHO_S_NW_MODELING_SRC_DATA
*  INTO TABLE @DATA(IT_GHO_S_NW_MODELING_SRC_DATA2).
*--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_GHO_S_NW_MODELING_SRC_DATA INDEX 1 INTO DATA(WA_GHO_S_NW_MODELING_SRC_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GHO_S_NW_MODELING_SRC_DATA>-KANTE = 1.
<GHO_S_NW_MODELING_SRC_DATA>-ACTION = 1.
<GHO_S_NW_MODELING_SRC_DATA>-NETID = 1.
<GHO_S_NW_MODELING_SRC_DATA>-MEDIUM = 1.
<GHO_S_NW_MODELING_SRC_DATA>-TPVON = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GHO_S_NW_MODELING_SRC_DATA-TPNACH, sy-vline,
  WA_GHO_S_NW_MODELING_SRC_DATA-DATVA, sy-vline,
  WA_GHO_S_NW_MODELING_SRC_DATA-ZEITVA, sy-vline,
  WA_GHO_S_NW_MODELING_SRC_DATA-DATVB, sy-vline,
  WA_GHO_S_NW_MODELING_SRC_DATA-ZEITVB, sy-vline,
  WA_GHO_S_NW_MODELING_SRC_DATA-DATVA_N, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GHO_S_NW_MODELING_SRC_DATA 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_GHO_S_NW_MODELING_SRC_DATA 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_GHO_S_NW_MODELING_SRC_DATA INTO WA_GHO_S_NW_MODELING_SRC_DATA.


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

*Conversion exit TPLNR, internal->external for field NETID
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_GHO_S_NW_MODELING_SRC_DATA-NETID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GHO_S_NW_MODELING_SRC_DATA-NETID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPVON
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_GHO_S_NW_MODELING_SRC_DATA-TPVON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GHO_S_NW_MODELING_SRC_DATA-TPVON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPNACH
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_GHO_S_NW_MODELING_SRC_DATA-TPNACH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GHO_S_NW_MODELING_SRC_DATA-TPNACH.
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_GHO_S_NW_MODELING_SRC_DATA_STR, 
KANTE TYPE STRING,
ACTION TYPE STRING,
NETID TYPE STRING,
MEDIUM TYPE STRING,
TPVON TYPE STRING,
TPNACH TYPE STRING,
DATVA TYPE STRING,
ZEITVA TYPE STRING,
DATVB TYPE STRING,
ZEITVB TYPE STRING,
DATVA_N TYPE STRING,
ZEITVA_N TYPE STRING,
DATVB_N TYPE STRING,
ZEITVB_N TYPE STRING,
ELIGIBILITY_INDI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GHO_S_NW_MODELING_SRC_DATA_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_GHO_S_NW_MODELING_SRC_DATA_STR-KANTE sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-ACTION sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-NETID sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-MEDIUM sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-TPVON sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-TPNACH sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-DATVA sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-ZEITVA sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-DATVB sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-ZEITVB sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-DATVA_N sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-ZEITVA_N sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-DATVB_N sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-ZEITVB_N sy-vline 
WA_GHO_S_NW_MODELING_SRC_DATA_STR-ELIGIBILITY_INDI sy-vline      INTO ld_text SEPARATED BY SPACE.

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