ABAP Select data from SAP table VNWCHLCOEA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VNWCHLCOEA
*  INTO TABLE @DATA(IT_VNWCHLCOEA2).
*--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_VNWCHLCOEA INDEX 1 INTO DATA(WA_VNWCHLCOEA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VNWCHLCOEA>-MANDT = 1.
<VNWCHLCOEA>-VBELN = 1.
<VNWCHLCOEA>-POSNR = 1.
<VNWCHLCOEA>-LNRKO = 1.
<VNWCHLCOEA>-LNRLS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VNWCHLCOEA-UBDAT, sy-vline,
  WA_VNWCHLCOEA-UMENG, sy-vline,
  WA_VNWCHLCOEA-LSTAR, sy-vline,
  WA_VNWCHLCOEA-LMENG, sy-vline,
  WA_VNWCHLCOEA-LEINH, sy-vline,
  WA_VNWCHLCOEA-ORGID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VNWCHLCOEA 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_VNWCHLCOEA 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_VNWCHLCOEA INTO WA_VNWCHLCOEA.


*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_VNWCHLCOEA-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNWCHLCOEA-VBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field LEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VNWCHLCOEA-LEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNWCHLCOEA-LEINH.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_VNWCHLCOEA-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNWCHLCOEA-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BZLST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VNWCHLCOEA-BZLST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNWCHLCOEA-BZLST.
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_VNWCHLCOEA_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
LNRKO TYPE STRING,
LNRLS TYPE STRING,
UBDAT TYPE STRING,
UMENG TYPE STRING,
LSTAR TYPE STRING,
LMENG TYPE STRING,
LEINH TYPE STRING,
ORGID TYPE STRING,
ANFOE TYPE STRING,
ANPOE TYPE STRING,
ERBOE TYPE STRING,
SKOST TYPE STRING,
EKOST TYPE STRING,
EAUFN TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
STOBL TYPE STRING,
STORN TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
USNAM TYPE STRING,
TCODE TYPE STRING,
VORGN TYPE STRING,
PERIO TYPE STRING,
GJAHR TYPE STRING,
BZLST TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VNWCHLCOEA_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_VNWCHLCOEA_STR-MANDT sy-vline 
WA_VNWCHLCOEA_STR-VBELN sy-vline 
WA_VNWCHLCOEA_STR-POSNR sy-vline 
WA_VNWCHLCOEA_STR-LNRKO sy-vline 
WA_VNWCHLCOEA_STR-LNRLS sy-vline 
WA_VNWCHLCOEA_STR-UBDAT sy-vline 
WA_VNWCHLCOEA_STR-UMENG sy-vline 
WA_VNWCHLCOEA_STR-LSTAR sy-vline 
WA_VNWCHLCOEA_STR-LMENG sy-vline 
WA_VNWCHLCOEA_STR-LEINH sy-vline 
WA_VNWCHLCOEA_STR-ORGID sy-vline 
WA_VNWCHLCOEA_STR-ANFOE sy-vline 
WA_VNWCHLCOEA_STR-ANPOE sy-vline 
WA_VNWCHLCOEA_STR-ERBOE sy-vline 
WA_VNWCHLCOEA_STR-SKOST sy-vline 
WA_VNWCHLCOEA_STR-EKOST sy-vline 
WA_VNWCHLCOEA_STR-EAUFN sy-vline 
WA_VNWCHLCOEA_STR-KOKRS sy-vline 
WA_VNWCHLCOEA_STR-BELNR sy-vline 
WA_VNWCHLCOEA_STR-STOBL sy-vline 
WA_VNWCHLCOEA_STR-STORN sy-vline 
WA_VNWCHLCOEA_STR-BLDAT sy-vline 
WA_VNWCHLCOEA_STR-BUDAT sy-vline 
WA_VNWCHLCOEA_STR-USNAM sy-vline 
WA_VNWCHLCOEA_STR-TCODE sy-vline 
WA_VNWCHLCOEA_STR-VORGN sy-vline 
WA_VNWCHLCOEA_STR-PERIO sy-vline 
WA_VNWCHLCOEA_STR-GJAHR sy-vline 
WA_VNWCHLCOEA_STR-BZLST sy-vline 
WA_VNWCHLCOEA_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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