ABAP Select data from SAP table ICRVSUBLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICRVSUBLIST
*  INTO TABLE @DATA(IT_ICRVSUBLIST2).
*--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_ICRVSUBLIST INDEX 1 INTO DATA(WA_ICRVSUBLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICRVSUBLIST>-MANDT = 1.
<ICRVSUBLIST>-SUBSTANCELISTUUID = 1.
<ICRVSUBLIST>-CMPLRQVERS = 1.
<ICRVSUBLIST>-CMPLRQVERSUUID = 1.
<ICRVSUBLIST>-SUBSTANCELIST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICRVSUBLIST-SUBSTANCELISTINTVERS, sy-vline,
  WA_ICRVSUBLIST-SUBSTANCELISTINTVERSDATE, sy-vline,
  WA_ICRVSUBLIST-SUBSTANCELISTTYPE, sy-vline,
  WA_ICRVSUBLIST-SUBSTANCELISTCOPYRIGHTTXT, sy-vline,
  WA_ICRVSUBLIST-COMPONENTTHRESHOLD, sy-vline,
  WA_ICRVSUBLIST-COMPONENTTHRESHOLDUOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICRVSUBLIST 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_ICRVSUBLIST 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_ICRVSUBLIST INTO WA_ICRVSUBLIST.


*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 EHUNI, internal->external for field COMPONENTTHRESHOLDUOM
CALL FUNCTION 'CONVERSION_EXIT_EHUNI_OUTPUT'
  EXPORTING
    input =                      WA_ICRVSUBLIST-COMPONENTTHRESHOLDUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICRVSUBLIST-COMPONENTTHRESHOLDUOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EHUNI, internal->external for field VOLUMETHRESHOLDUOM
CALL FUNCTION 'CONVERSION_EXIT_EHUNI_OUTPUT'
  EXPORTING
    input =                      WA_ICRVSUBLIST-VOLUMETHRESHOLDUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICRVSUBLIST-VOLUMETHRESHOLDUOM.
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_ICRVSUBLIST_STR, 
MANDT TYPE STRING,
SUBSTANCELISTUUID TYPE STRING,
CMPLRQVERS TYPE STRING,
CMPLRQVERSUUID TYPE STRING,
SUBSTANCELIST TYPE STRING,
SUBSTANCELISTINTVERS TYPE STRING,
SUBSTANCELISTINTVERSDATE TYPE STRING,
SUBSTANCELISTTYPE TYPE STRING,
SUBSTANCELISTCOPYRIGHTTXT TYPE STRING,
COMPONENTTHRESHOLD TYPE STRING,
COMPONENTTHRESHOLDUOM TYPE STRING,
VOLUMETHRESHOLD TYPE STRING,
VOLUMETHRESHOLDUOM TYPE STRING,
THRESHOLDPERIOD TYPE STRING,
CMPLRQVERSPARAGRAPHUUID TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICRVSUBLIST_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_ICRVSUBLIST_STR-MANDT sy-vline 
WA_ICRVSUBLIST_STR-SUBSTANCELISTUUID sy-vline 
WA_ICRVSUBLIST_STR-CMPLRQVERS sy-vline 
WA_ICRVSUBLIST_STR-CMPLRQVERSUUID sy-vline 
WA_ICRVSUBLIST_STR-SUBSTANCELIST sy-vline 
WA_ICRVSUBLIST_STR-SUBSTANCELISTINTVERS sy-vline 
WA_ICRVSUBLIST_STR-SUBSTANCELISTINTVERSDATE sy-vline 
WA_ICRVSUBLIST_STR-SUBSTANCELISTTYPE sy-vline 
WA_ICRVSUBLIST_STR-SUBSTANCELISTCOPYRIGHTTXT sy-vline 
WA_ICRVSUBLIST_STR-COMPONENTTHRESHOLD sy-vline 
WA_ICRVSUBLIST_STR-COMPONENTTHRESHOLDUOM sy-vline 
WA_ICRVSUBLIST_STR-VOLUMETHRESHOLD sy-vline 
WA_ICRVSUBLIST_STR-VOLUMETHRESHOLDUOM sy-vline 
WA_ICRVSUBLIST_STR-THRESHOLDPERIOD sy-vline 
WA_ICRVSUBLIST_STR-CMPLRQVERSPARAGRAPHUUID sy-vline 
WA_ICRVSUBLIST_STR-CREATEDBYUSER sy-vline 
WA_ICRVSUBLIST_STR-LASTCHANGEDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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