ABAP Select data from SAP table V_CWTY001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_CWTY001 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_CWTY001. 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_CWTY001 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_CWTY001 TYPE STANDARD TABLE OF V_CWTY001,
      WA_V_CWTY001 TYPE V_CWTY001,
      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_CWTY001> TYPE V_CWTY001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_CWTY001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_CWTY001
  INTO TABLE IT_V_CWTY001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_CWTY001
*  INTO TABLE @DATA(IT_V_CWTY0012).
*--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_CWTY001 INDEX 1 INTO DATA(WA_V_CWTY0012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_CWTY001 ASSIGNING <V_CWTY001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_CWTY001>-MANDT = 1.
<V_CWTY001>-CLMTY = 1.
<V_CWTY001>-CLMTY_DES = 1.
<V_CWTY001>-NUMKI = 1.
<V_CWTY001>-NUMKE = 1.

ENDLOOP.

LOOP AT IT_V_CWTY001 INTO WA_V_CWTY001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_CWTY001-HEADER_DYNPRO, sy-vline,
  WA_V_CWTY001-LAYOUT_TREE, sy-vline,
  WA_V_CWTY001-LAYOUT, sy-vline,
  WA_V_CWTY001-AAPROF, sy-vline,
  WA_V_CWTY001-PARVW, sy-vline,
  WA_V_CWTY001-PARNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_CWTY001 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_CWTY001 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_CWTY001 INTO WA_V_CWTY001.


*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 PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_V_CWTY001-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_CWTY001-PARVW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_CWTY001-PARNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_CWTY001-PARNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW_IC
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_V_CWTY001-PARVW_IC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_CWTY001-PARVW_IC.
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_CWTY001_STR, 
MANDT TYPE STRING,
CLMTY TYPE STRING,
CLMTY_DES TYPE STRING,
NUMKI TYPE STRING,
NUMKE TYPE STRING,
HEADER_DYNPRO TYPE STRING,
LAYOUT_TREE TYPE STRING,
LAYOUT TYPE STRING,
AAPROF TYPE STRING,
PARVW TYPE STRING,
PARNR TYPE STRING,
PARVW_IC TYPE STRING,
KALSM_PR TYPE STRING,
KALSM_NA TYPE STRING,
KALSM_KO TYPE STRING,
ASTATE TYPE STRING,
WERKS TYPE STRING,
CRNCY_IC TYPE STRING,
START_KATEG TYPE STRING,
BLART_R TYPE STRING,
BLART_P TYPE STRING,
ERSCH TYPE STRING,
VTWEG TYPE STRING,
VKORG TYPE STRING,
SPART TYPE STRING,
SPLCR TYPE STRING,
ASTATE_IV TYPE STRING,
EKORG TYPE STRING,
RECALL TYPE STRING,
CHANGEDOC TYPE STRING,
POSKT_GRP TYPE STRING,
AUTO TYPE STRING,
PARGR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_CWTY001_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_CWTY001_STR-MANDT sy-vline 
WA_V_CWTY001_STR-CLMTY sy-vline 
WA_V_CWTY001_STR-CLMTY_DES sy-vline 
WA_V_CWTY001_STR-NUMKI sy-vline 
WA_V_CWTY001_STR-NUMKE sy-vline 
WA_V_CWTY001_STR-HEADER_DYNPRO sy-vline 
WA_V_CWTY001_STR-LAYOUT_TREE sy-vline 
WA_V_CWTY001_STR-LAYOUT sy-vline 
WA_V_CWTY001_STR-AAPROF sy-vline 
WA_V_CWTY001_STR-PARVW sy-vline 
WA_V_CWTY001_STR-PARNR sy-vline 
WA_V_CWTY001_STR-PARVW_IC sy-vline 
WA_V_CWTY001_STR-KALSM_PR sy-vline 
WA_V_CWTY001_STR-KALSM_NA sy-vline 
WA_V_CWTY001_STR-KALSM_KO sy-vline 
WA_V_CWTY001_STR-ASTATE sy-vline 
WA_V_CWTY001_STR-WERKS sy-vline 
WA_V_CWTY001_STR-CRNCY_IC sy-vline 
WA_V_CWTY001_STR-START_KATEG sy-vline 
WA_V_CWTY001_STR-BLART_R sy-vline 
WA_V_CWTY001_STR-BLART_P sy-vline 
WA_V_CWTY001_STR-ERSCH sy-vline 
WA_V_CWTY001_STR-VTWEG sy-vline 
WA_V_CWTY001_STR-VKORG sy-vline 
WA_V_CWTY001_STR-SPART sy-vline 
WA_V_CWTY001_STR-SPLCR sy-vline 
WA_V_CWTY001_STR-ASTATE_IV sy-vline 
WA_V_CWTY001_STR-EKORG sy-vline 
WA_V_CWTY001_STR-RECALL sy-vline 
WA_V_CWTY001_STR-CHANGEDOC sy-vline 
WA_V_CWTY001_STR-POSKT_GRP sy-vline 
WA_V_CWTY001_STR-AUTO sy-vline 
WA_V_CWTY001_STR-PARGR sy-vline      INTO ld_text SEPARATED BY SPACE.

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