ABAP Select data from SAP table V_7CN20_SI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_7CN20_SI 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_7CN20_SI. 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_7CN20_SI 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_7CN20_SI TYPE STANDARD TABLE OF V_7CN20_SI,
      WA_V_7CN20_SI TYPE V_7CN20_SI,
      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_7CN20_SI> TYPE V_7CN20_SI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_7CN20_SI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_7CN20_SI
  INTO TABLE IT_V_7CN20_SI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_7CN20_SI
*  INTO TABLE @DATA(IT_V_7CN20_SI2).
*--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_7CN20_SI INDEX 1 INTO DATA(WA_V_7CN20_SI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_7CN20_SI ASSIGNING <V_7CN20_SI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_7CN20_SI>-MANDT = 1.
<V_7CN20_SI>-INFTY = 1.
<V_7CN20_SI>-INTYP = 1.
<V_7CN20_SI>-CONBR = 1.
<V_7CN20_SI>-CONAR = 1.

ENDLOOP.

LOOP AT IT_V_7CN20_SI INTO WA_V_7CN20_SI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_7CN20_SI-CONGR, sy-vline,
  WA_V_7CN20_SI-CONLV, sy-vline,
  WA_V_7CN20_SI-ENDDA, sy-vline,
  WA_V_7CN20_SI-PASSR, sy-vline,
  WA_V_7CN20_SI-BEGDA, sy-vline,
  WA_V_7CN20_SI-EEIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_7CN20_SI 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_7CN20_SI 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_7CN20_SI INTO WA_V_7CN20_SI.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_V_7CN20_SI_STR, 
MANDT TYPE STRING,
INFTY TYPE STRING,
INTYP TYPE STRING,
CONBR TYPE STRING,
CONAR TYPE STRING,
CONGR TYPE STRING,
CONLV TYPE STRING,
ENDDA TYPE STRING,
PASSR TYPE STRING,
BEGDA TYPE STRING,
EEIND TYPE STRING,
EERAT TYPE STRING,
EECON TYPE STRING,
ECCUR TYPE STRING,
EELOW TYPE STRING,
EELCU TYPE STRING,
EEHIG TYPE STRING,
EEHCU TYPE STRING,
ERIND TYPE STRING,
ERRAT TYPE STRING,
ERCON TYPE STRING,
RCCUR TYPE STRING,
ERLOW TYPE STRING,
ERLCU TYPE STRING,
ERHIG TYPE STRING,
ERHCU TYPE STRING,
TYTXT TYPE STRING,
ARTXT TYPE STRING,
EEWGE TYPE STRING,
ERWGE TYPE STRING,
EEBSR TYPE STRING,
EECOR TYPE STRING,
ERBSR TYPE STRING,
ERCOR TYPE STRING,
ERDIF TYPE STRING,
EEAHI TYPE STRING,
EEAHC TYPE STRING,
ERAHI TYPE STRING,
ERAHC TYPE STRING,
EEALO TYPE STRING,
EEALC TYPE STRING,
ERALO TYPE STRING,
ERALC TYPE STRING,
STEXT TYPE STRING,
CONGRT TYPE STRING,
CONLVT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_7CN20_SI_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_7CN20_SI_STR-MANDT sy-vline 
WA_V_7CN20_SI_STR-INFTY sy-vline 
WA_V_7CN20_SI_STR-INTYP sy-vline 
WA_V_7CN20_SI_STR-CONBR sy-vline 
WA_V_7CN20_SI_STR-CONAR sy-vline 
WA_V_7CN20_SI_STR-CONGR sy-vline 
WA_V_7CN20_SI_STR-CONLV sy-vline 
WA_V_7CN20_SI_STR-ENDDA sy-vline 
WA_V_7CN20_SI_STR-PASSR sy-vline 
WA_V_7CN20_SI_STR-BEGDA sy-vline 
WA_V_7CN20_SI_STR-EEIND sy-vline 
WA_V_7CN20_SI_STR-EERAT sy-vline 
WA_V_7CN20_SI_STR-EECON sy-vline 
WA_V_7CN20_SI_STR-ECCUR sy-vline 
WA_V_7CN20_SI_STR-EELOW sy-vline 
WA_V_7CN20_SI_STR-EELCU sy-vline 
WA_V_7CN20_SI_STR-EEHIG sy-vline 
WA_V_7CN20_SI_STR-EEHCU sy-vline 
WA_V_7CN20_SI_STR-ERIND sy-vline 
WA_V_7CN20_SI_STR-ERRAT sy-vline 
WA_V_7CN20_SI_STR-ERCON sy-vline 
WA_V_7CN20_SI_STR-RCCUR sy-vline 
WA_V_7CN20_SI_STR-ERLOW sy-vline 
WA_V_7CN20_SI_STR-ERLCU sy-vline 
WA_V_7CN20_SI_STR-ERHIG sy-vline 
WA_V_7CN20_SI_STR-ERHCU sy-vline 
WA_V_7CN20_SI_STR-TYTXT sy-vline 
WA_V_7CN20_SI_STR-ARTXT sy-vline 
WA_V_7CN20_SI_STR-EEWGE sy-vline 
WA_V_7CN20_SI_STR-ERWGE sy-vline 
WA_V_7CN20_SI_STR-EEBSR sy-vline 
WA_V_7CN20_SI_STR-EECOR sy-vline 
WA_V_7CN20_SI_STR-ERBSR sy-vline 
WA_V_7CN20_SI_STR-ERCOR sy-vline 
WA_V_7CN20_SI_STR-ERDIF sy-vline 
WA_V_7CN20_SI_STR-EEAHI sy-vline 
WA_V_7CN20_SI_STR-EEAHC sy-vline 
WA_V_7CN20_SI_STR-ERAHI sy-vline 
WA_V_7CN20_SI_STR-ERAHC sy-vline 
WA_V_7CN20_SI_STR-EEALO sy-vline 
WA_V_7CN20_SI_STR-EEALC sy-vline 
WA_V_7CN20_SI_STR-ERALO sy-vline 
WA_V_7CN20_SI_STR-ERALC sy-vline 
WA_V_7CN20_SI_STR-STEXT sy-vline 
WA_V_7CN20_SI_STR-CONGRT sy-vline 
WA_V_7CN20_SI_STR-CONLVT sy-vline      INTO ld_text SEPARATED BY SPACE.

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