ABAP Select data from SAP table ICRVMLPRDF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICRVMLPRDF
*  INTO TABLE @DATA(IT_ICRVMLPRDF2).
*--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_ICRVMLPRDF INDEX 1 INTO DATA(WA_ICRVMLPRDF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICRVMLPRDF>-MANDT = 1.
<ICRVMLPRDF>-CHMLCMPLNCINFOUUID = 1.
<ICRVMLPRDF>-CHMLCOMPOSITIONTYPE = 1.
<ICRVMLPRDF>-PRODUCT = 1.
<ICRVMLPRDF>-CMPLRQVERSSUBSTLISTCNCTNTDNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICRVMLPRDF-COUNTRY, sy-vline,
  WA_ICRVMLPRDF-SUBSTANCEUUID, sy-vline,
  WA_ICRVMLPRDF-SUBSTANCEVARASSGMTUUID, sy-vline,
  WA_ICRVMLPRDF-SUBSTANCELISTITMUUID, sy-vline,
  WA_ICRVMLPRDF-LISTEDSUBSTANCE, sy-vline,
  WA_ICRVMLPRDF-COMPANYSUBSTANCENAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICRVMLPRDF 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_ICRVMLPRDF 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_ICRVMLPRDF INTO WA_ICRVMLPRDF.


*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 PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ICRVMLPRDF-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICRVMLPRDF-PRODUCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LISTEDSUBSTANCE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICRVMLPRDF-LISTEDSUBSTANCE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICRVMLPRDF-LISTEDSUBSTANCE.
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_ICRVMLPRDF_STR, 
MANDT TYPE STRING,
CHMLCMPLNCINFOUUID TYPE STRING,
CHMLCOMPOSITIONTYPE TYPE STRING,
PRODUCT TYPE STRING,
CMPLRQVERSSUBSTLISTCNCTNTDNAME TYPE STRING,
COUNTRY TYPE STRING,
SUBSTANCEUUID TYPE STRING,
SUBSTANCEVARASSGMTUUID TYPE STRING,
SUBSTANCELISTITMUUID TYPE STRING,
LISTEDSUBSTANCE TYPE STRING,
COMPANYSUBSTANCENAME TYPE STRING,
MATERIALGROUP TYPE STRING,
CHMLCMPLNCPRODNALLWD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICRVMLPRDF_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_ICRVMLPRDF_STR-MANDT sy-vline 
WA_ICRVMLPRDF_STR-CHMLCMPLNCINFOUUID sy-vline 
WA_ICRVMLPRDF_STR-CHMLCOMPOSITIONTYPE sy-vline 
WA_ICRVMLPRDF_STR-PRODUCT sy-vline 
WA_ICRVMLPRDF_STR-CMPLRQVERSSUBSTLISTCNCTNTDNAME sy-vline 
WA_ICRVMLPRDF_STR-COUNTRY sy-vline 
WA_ICRVMLPRDF_STR-SUBSTANCEUUID sy-vline 
WA_ICRVMLPRDF_STR-SUBSTANCEVARASSGMTUUID sy-vline 
WA_ICRVMLPRDF_STR-SUBSTANCELISTITMUUID sy-vline 
WA_ICRVMLPRDF_STR-LISTEDSUBSTANCE sy-vline 
WA_ICRVMLPRDF_STR-COMPANYSUBSTANCENAME sy-vline 
WA_ICRVMLPRDF_STR-MATERIALGROUP sy-vline 
WA_ICRVMLPRDF_STR-CHMLCMPLNCPRODNALLWD sy-vline      INTO ld_text SEPARATED BY SPACE.

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