ABAP Select data from SAP table V_NCH43A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_NCH43A 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_NCH43A. 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_NCH43A 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_NCH43A TYPE STANDARD TABLE OF V_NCH43A,
      WA_V_NCH43A TYPE V_NCH43A,
      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_NCH43A> TYPE V_NCH43A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_NCH43A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_NCH43A
  INTO TABLE IT_V_NCH43A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_NCH43A
*  INTO TABLE @DATA(IT_V_NCH43A2).
*--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_NCH43A INDEX 1 INTO DATA(WA_V_NCH43A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_NCH43A ASSIGNING <V_NCH43A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_NCH43A>-MANDT = 1.
<V_NCH43A>-EINRI = 1.
<V_NCH43A>-RGART = 1.
<V_NCH43A>-ABRVB = 1.
<V_NCH43A>-CLASS = 1.

ENDLOOP.

LOOP AT IT_V_NCH43A INTO WA_V_NCH43A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_NCH43A-ANFOE, sy-vline,
  WA_V_NCH43A-ERBOE, sy-vline,
  WA_V_NCH43A-TARID, sy-vline,
  WA_V_NCH43A-TARLS, sy-vline,
  WA_V_NCH43A-TAGRU, sy-vline,
  WA_V_NCH43A-ENTGA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_NCH43A 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_NCH43A 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_NCH43A INTO WA_V_NCH43A.


*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_NCH43A-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABRVB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-ABRVB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-ABRVB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CLASS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-CLASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-CLASS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-ANFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-ANFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERBOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-ERBOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-ERBOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TARID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-TARID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-TARID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TARLS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-TARLS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-TARLS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TAGRU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-TAGRU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-TAGRU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTGA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-ENTGA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-ENTGA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROLTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-ROLTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-ROLTP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RANK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-RANK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-RANK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROLEA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-ROLEA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-ROLEA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROLEB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NCH43A-ROLEB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NCH43A-ROLEB.
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_NCH43A_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
RGART TYPE STRING,
ABRVB TYPE STRING,
CLASS TYPE STRING,
ANFOE TYPE STRING,
ERBOE TYPE STRING,
TARID TYPE STRING,
TARLS TYPE STRING,
TAGRU TYPE STRING,
ENTGA TYPE STRING,
ROLTP TYPE STRING,
RANK TYPE STRING,
POSNO TYPE STRING,
ROLNO TYPE STRING,
ROLEA TYPE STRING,
ROLEB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_NCH43A_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_NCH43A_STR-MANDT sy-vline 
WA_V_NCH43A_STR-EINRI sy-vline 
WA_V_NCH43A_STR-RGART sy-vline 
WA_V_NCH43A_STR-ABRVB sy-vline 
WA_V_NCH43A_STR-CLASS sy-vline 
WA_V_NCH43A_STR-ANFOE sy-vline 
WA_V_NCH43A_STR-ERBOE sy-vline 
WA_V_NCH43A_STR-TARID sy-vline 
WA_V_NCH43A_STR-TARLS sy-vline 
WA_V_NCH43A_STR-TAGRU sy-vline 
WA_V_NCH43A_STR-ENTGA sy-vline 
WA_V_NCH43A_STR-ROLTP sy-vline 
WA_V_NCH43A_STR-RANK sy-vline 
WA_V_NCH43A_STR-POSNO sy-vline 
WA_V_NCH43A_STR-ROLNO sy-vline 
WA_V_NCH43A_STR-ROLEA sy-vline 
WA_V_NCH43A_STR-ROLEB sy-vline      INTO ld_text SEPARATED BY SPACE.

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