ABAP Select data from SAP table CHVW_INC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CHVW_INC
*  INTO TABLE @DATA(IT_CHVW_INC2).
*--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_CHVW_INC INDEX 1 INTO DATA(WA_CHVW_INC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CHVW_INC>-MANDT = 1.
<CHVW_INC>-FMATNR = 1.
<CHVW_INC>-FCHARG = 1.
<CHVW_INC>-FWERKS = 1.
<CHVW_INC>-AUFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CHVW_INC-AUFPS, sy-vline,
  WA_CHVW_INC-KMATNR, sy-vline,
  WA_CHVW_INC-KCHARG, sy-vline,
  WA_CHVW_INC-KWERKS, sy-vline,
  WA_CHVW_INC-MENGE, sy-vline,
  WA_CHVW_INC-MEINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CHVW_INC 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_CHVW_INC 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_CHVW_INC INTO WA_CHVW_INC.


*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 MATN1, internal->external for field FMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CHVW_INC-FMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CHVW_INC-FMATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field KMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CHVW_INC-KMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CHVW_INC-KMATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field FMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CHVW_INC-FMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CHVW_INC-FMEINS.
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_CHVW_INC_STR, 
MANDT TYPE STRING,
FMATNR TYPE STRING,
FCHARG TYPE STRING,
FWERKS TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
KMATNR TYPE STRING,
KCHARG TYPE STRING,
KWERKS TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
/CWM/MENGE TYPE STRING,
/CWM/MEINS TYPE STRING,
FMENGE TYPE STRING,
FMEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CHVW_INC_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_CHVW_INC_STR-MANDT sy-vline 
WA_CHVW_INC_STR-FMATNR sy-vline 
WA_CHVW_INC_STR-FCHARG sy-vline 
WA_CHVW_INC_STR-FWERKS sy-vline 
WA_CHVW_INC_STR-AUFNR sy-vline 
WA_CHVW_INC_STR-AUFPS sy-vline 
WA_CHVW_INC_STR-KMATNR sy-vline 
WA_CHVW_INC_STR-KCHARG sy-vline 
WA_CHVW_INC_STR-KWERKS sy-vline 
WA_CHVW_INC_STR-MENGE sy-vline 
WA_CHVW_INC_STR-MEINS sy-vline 
WA_CHVW_INC_STR-/CWM/MENGE sy-vline 
WA_CHVW_INC_STR-/CWM/MEINS sy-vline 
WA_CHVW_INC_STR-FMENGE sy-vline 
WA_CHVW_INC_STR-FMEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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