ABAP Select data from SAP table P_VALUETOCOLLSTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P_VALUETOCOLLSTR
*  INTO TABLE @DATA(IT_P_VALUETOCOLLSTR2).
*--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_P_VALUETOCOLLSTR INDEX 1 INTO DATA(WA_P_VALUETOCOLLSTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P_VALUETOCOLLSTR>-MANDT = 1.
<P_VALUETOCOLLSTR>-COLLECTIONSTRATEGY = 1.
<P_VALUETOCOLLSTR>-COLLRULESQNCNMBRINSTRGY = 1.
<P_VALUETOCOLLSTR>-COLLSELOPTNCNTRINSTRGY = 1.
<P_VALUETOCOLLSTR>-COLLBASICRULESTRUC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P_VALUETOCOLLSTR-COLLBASICRULEFIELDNAME, sy-vline,
  WA_P_VALUETOCOLLSTR-SETRANGESIGN, sy-vline,
  WA_P_VALUETOCOLLSTR-SETRANGEOPTION, sy-vline,
  WA_P_VALUETOCOLLSTR-SETRANGEFROMVALUE, sy-vline,
  WA_P_VALUETOCOLLSTR-SETRANGETOVALUE, sy-vline,
  WA_P_VALUETOCOLLSTR-COLLSTRGYCURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P_VALUETOCOLLSTR 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_P_VALUETOCOLLSTR 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_P_VALUETOCOLLSTR INTO WA_P_VALUETOCOLLSTR.


*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 COLLECTIONSTRATEGY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P_VALUETOCOLLSTR-COLLECTIONSTRATEGY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P_VALUETOCOLLSTR-COLLECTIONSTRATEGY.
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_P_VALUETOCOLLSTR_STR, 
MANDT TYPE STRING,
COLLECTIONSTRATEGY TYPE STRING,
COLLRULESQNCNMBRINSTRGY TYPE STRING,
COLLSELOPTNCNTRINSTRGY TYPE STRING,
COLLBASICRULESTRUC TYPE STRING,
COLLBASICRULEFIELDNAME TYPE STRING,
SETRANGESIGN TYPE STRING,
SETRANGEOPTION TYPE STRING,
SETRANGEFROMVALUE TYPE STRING,
SETRANGETOVALUE TYPE STRING,
COLLSTRGYCURRENCY TYPE STRING,
MINTARGETAMOUNT TYPE STRING,
MAXTARGETAMOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P_VALUETOCOLLSTR_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_P_VALUETOCOLLSTR_STR-MANDT sy-vline 
WA_P_VALUETOCOLLSTR_STR-COLLECTIONSTRATEGY sy-vline 
WA_P_VALUETOCOLLSTR_STR-COLLRULESQNCNMBRINSTRGY sy-vline 
WA_P_VALUETOCOLLSTR_STR-COLLSELOPTNCNTRINSTRGY sy-vline 
WA_P_VALUETOCOLLSTR_STR-COLLBASICRULESTRUC sy-vline 
WA_P_VALUETOCOLLSTR_STR-COLLBASICRULEFIELDNAME sy-vline 
WA_P_VALUETOCOLLSTR_STR-SETRANGESIGN sy-vline 
WA_P_VALUETOCOLLSTR_STR-SETRANGEOPTION sy-vline 
WA_P_VALUETOCOLLSTR_STR-SETRANGEFROMVALUE sy-vline 
WA_P_VALUETOCOLLSTR_STR-SETRANGETOVALUE sy-vline 
WA_P_VALUETOCOLLSTR_STR-COLLSTRGYCURRENCY sy-vline 
WA_P_VALUETOCOLLSTR_STR-MINTARGETAMOUNT sy-vline 
WA_P_VALUETOCOLLSTR_STR-MAXTARGETAMOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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