ABAP Select data from SAP table GHO_ALC_SRC_NWM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GHO_ALC_SRC_NWM 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_ALC_SRC_NWM. 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_ALC_SRC_NWM 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_ALC_SRC_NWM TYPE STANDARD TABLE OF GHO_ALC_SRC_NWM,
      WA_GHO_ALC_SRC_NWM TYPE GHO_ALC_SRC_NWM,
      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_ALC_SRC_NWM> TYPE GHO_ALC_SRC_NWM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GHO_ALC_SRC_NWM
*  INTO TABLE @DATA(IT_GHO_ALC_SRC_NWM2).
*--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_ALC_SRC_NWM INDEX 1 INTO DATA(WA_GHO_ALC_SRC_NWM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GHO_ALC_SRC_NWM>-CLIENT = 1.
<GHO_ALC_SRC_NWM>-ALC_SRC_GUID = 1.
<GHO_ALC_SRC_NWM>-ALLOC_NETID = 1.
<GHO_ALC_SRC_NWM>-ALLOC_MEDIUM = 1.
<GHO_ALC_SRC_NWM>-KANTE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GHO_ALC_SRC_NWM-MLANG, sy-vline,
  WA_GHO_ALC_SRC_NWM-NETID, sy-vline,
  WA_GHO_ALC_SRC_NWM-KANTYP, sy-vline,
  WA_GHO_ALC_SRC_NWM-TPVON, sy-vline,
  WA_GHO_ALC_SRC_NWM-EQVON, sy-vline,
  WA_GHO_ALC_SRC_NWM-TPNACH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GHO_ALC_SRC_NWM 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_ALC_SRC_NWM 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_ALC_SRC_NWM INTO WA_GHO_ALC_SRC_NWM.


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

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

*Conversion exit ISOLA, internal->external for field MLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_GHO_ALC_SRC_NWM-MLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GHO_ALC_SRC_NWM-MLANG.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_GHO_ALC_SRC_NWM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GHO_ALC_SRC_NWM-MATNR.
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_ALC_SRC_NWM_STR, 
CLIENT TYPE STRING,
ALC_SRC_GUID TYPE STRING,
ALLOC_NETID TYPE STRING,
ALLOC_MEDIUM TYPE STRING,
KANTE TYPE STRING,
MLANG TYPE STRING,
NETID TYPE STRING,
KANTYP TYPE STRING,
TPVON TYPE STRING,
EQVON TYPE STRING,
TPNACH TYPE STRING,
EQNACH TYPE STRING,
LFDKNR TYPE STRING,
DATVA TYPE STRING,
ZEITVA TYPE STRING,
DATVB TYPE STRING,
ZEITVB TYPE STRING,
STATUS TYPE STRING,
TPKANT TYPE STRING,
EQKANT TYPE STRING,
MEDIU TYPE STRING,
BEZARP TYPE STRING,
BEZARL TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LVORM TYPE STRING,
NETYP TYPE STRING,
MATNR TYPE STRING,
ACTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GHO_ALC_SRC_NWM_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_ALC_SRC_NWM_STR-CLIENT sy-vline 
WA_GHO_ALC_SRC_NWM_STR-ALC_SRC_GUID sy-vline 
WA_GHO_ALC_SRC_NWM_STR-ALLOC_NETID sy-vline 
WA_GHO_ALC_SRC_NWM_STR-ALLOC_MEDIUM sy-vline 
WA_GHO_ALC_SRC_NWM_STR-KANTE sy-vline 
WA_GHO_ALC_SRC_NWM_STR-MLANG sy-vline 
WA_GHO_ALC_SRC_NWM_STR-NETID sy-vline 
WA_GHO_ALC_SRC_NWM_STR-KANTYP sy-vline 
WA_GHO_ALC_SRC_NWM_STR-TPVON sy-vline 
WA_GHO_ALC_SRC_NWM_STR-EQVON sy-vline 
WA_GHO_ALC_SRC_NWM_STR-TPNACH sy-vline 
WA_GHO_ALC_SRC_NWM_STR-EQNACH sy-vline 
WA_GHO_ALC_SRC_NWM_STR-LFDKNR sy-vline 
WA_GHO_ALC_SRC_NWM_STR-DATVA sy-vline 
WA_GHO_ALC_SRC_NWM_STR-ZEITVA sy-vline 
WA_GHO_ALC_SRC_NWM_STR-DATVB sy-vline 
WA_GHO_ALC_SRC_NWM_STR-ZEITVB sy-vline 
WA_GHO_ALC_SRC_NWM_STR-STATUS sy-vline 
WA_GHO_ALC_SRC_NWM_STR-TPKANT sy-vline 
WA_GHO_ALC_SRC_NWM_STR-EQKANT sy-vline 
WA_GHO_ALC_SRC_NWM_STR-MEDIU sy-vline 
WA_GHO_ALC_SRC_NWM_STR-BEZARP sy-vline 
WA_GHO_ALC_SRC_NWM_STR-BEZARL sy-vline 
WA_GHO_ALC_SRC_NWM_STR-ERDAT sy-vline 
WA_GHO_ALC_SRC_NWM_STR-ERNAM sy-vline 
WA_GHO_ALC_SRC_NWM_STR-AEDAT sy-vline 
WA_GHO_ALC_SRC_NWM_STR-AENAM sy-vline 
WA_GHO_ALC_SRC_NWM_STR-BEGRU sy-vline 
WA_GHO_ALC_SRC_NWM_STR-LVORM sy-vline 
WA_GHO_ALC_SRC_NWM_STR-NETYP sy-vline 
WA_GHO_ALC_SRC_NWM_STR-MATNR sy-vline 
WA_GHO_ALC_SRC_NWM_STR-ACTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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