ABAP Select data from SAP table V_NCH61 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_NCH61 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 V_NCH61. 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 V_NCH61 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_V_NCH61 TYPE STANDARD TABLE OF V_NCH61,
      WA_V_NCH61 TYPE V_NCH61,
      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: <V_NCH61> TYPE V_NCH61.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_NCH61.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_NCH61
  INTO TABLE IT_V_NCH61.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_NCH61
*  INTO TABLE @DATA(IT_V_NCH612).
*--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_V_NCH61 INDEX 1 INTO DATA(WA_V_NCH612).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_NCH61 ASSIGNING <V_NCH61>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_NCH61>-MANDT = 1.
<V_NCH61>-EINRI = 1.
<V_NCH61>-NCH_PRIO = 1.
<V_NCH61>-EAUFN = 1.
<V_NCH61>-VONAGR = 1.

ENDLOOP.

LOOP AT IT_V_NCH61 INTO WA_V_NCH61.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_NCH61-BISAGR, sy-vline,
  WA_V_NCH61-GSCHL, sy-vline,
  WA_V_NCH61-VONDRG, sy-vline,
  WA_V_NCH61-BISDRG, sy-vline,
  WA_V_NCH61-VONFPP, sy-vline,
  WA_V_NCH61-BISFPP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_NCH61 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_V_NCH61 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_V_NCH61 INTO WA_V_NCH61.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH61-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH61-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EAUFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH61-EAUFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH61-EAUFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VONDRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH61-VONDRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH61-VONDRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BISDRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH61-BISDRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH61-BISDRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VONFPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH61-VONFPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH61-VONFPP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BISFPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH61-BISFPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH61-BISFPP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VONOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH61-VONOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH61-VONOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BISOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH61-BISOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH61-BISOE.
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_V_NCH61_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
NCH_PRIO TYPE STRING,
EAUFN TYPE STRING,
VONAGR TYPE STRING,
BISAGR TYPE STRING,
GSCHL TYPE STRING,
VONDRG TYPE STRING,
BISDRG TYPE STRING,
VONFPP TYPE STRING,
BISFPP TYPE STRING,
VONOE TYPE STRING,
BISOE TYPE STRING,
VONC06 TYPE STRING,
BISC06 TYPE STRING,
VONC07 TYPE STRING,
BISC07 TYPE STRING,
VONC08 TYPE STRING,
BISC08 TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
EINKB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_NCH61_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_V_NCH61_STR-MANDT sy-vline 
WA_V_NCH61_STR-EINRI sy-vline 
WA_V_NCH61_STR-NCH_PRIO sy-vline 
WA_V_NCH61_STR-EAUFN sy-vline 
WA_V_NCH61_STR-VONAGR sy-vline 
WA_V_NCH61_STR-BISAGR sy-vline 
WA_V_NCH61_STR-GSCHL sy-vline 
WA_V_NCH61_STR-VONDRG sy-vline 
WA_V_NCH61_STR-BISDRG sy-vline 
WA_V_NCH61_STR-VONFPP sy-vline 
WA_V_NCH61_STR-BISFPP sy-vline 
WA_V_NCH61_STR-VONOE sy-vline 
WA_V_NCH61_STR-BISOE sy-vline 
WA_V_NCH61_STR-VONC06 sy-vline 
WA_V_NCH61_STR-BISC06 sy-vline 
WA_V_NCH61_STR-VONC07 sy-vline 
WA_V_NCH61_STR-BISC07 sy-vline 
WA_V_NCH61_STR-VONC08 sy-vline 
WA_V_NCH61_STR-BISC08 sy-vline 
WA_V_NCH61_STR-BEGDT sy-vline 
WA_V_NCH61_STR-ENDDT sy-vline 
WA_V_NCH61_STR-EINKB sy-vline      INTO ld_text SEPARATED BY SPACE.

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