ABAP Select data from SAP table RPMRP_CRITPROD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPMRP_CRITPROD
*  INTO TABLE @DATA(IT_RPMRP_CRITPROD2).
*--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_RPMRP_CRITPROD INDEX 1 INTO DATA(WA_RPMRP_CRITPROD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPMRP_CRITPROD>-MANDT = 1.
<RPMRP_CRITPROD>-PMRPSIMULATION = 1.
<RPMRP_CRITPROD>-PMRPFLXBLCSTRTPRODUCTGROUP = 1.
<RPMRP_CRITPROD>-PRODUCT = 1.
<RPMRP_CRITPROD>-PLANT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPMRP_CRITPROD-MRPAREA, sy-vline,
  WA_RPMRP_CRITPROD-PMRPSUPPLYGROUPCATEGORY, sy-vline,
  WA_RPMRP_CRITPROD-PMRPSUPPLYGROUP, sy-vline,
  WA_RPMRP_CRITPROD-PMRPSOURCEOFSUPPLYINTERNALID, sy-vline,
  WA_RPMRP_CRITPROD-BUCKETINTERNALID, sy-vline,
  WA_RPMRP_CRITPROD-CONSTRAINTISSUESCRITICALITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPMRP_CRITPROD 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_RPMRP_CRITPROD 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_RPMRP_CRITPROD INTO WA_RPMRP_CRITPROD.


*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_RPMRP_CRITPROD-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPMRP_CRITPROD-PRODUCT.
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_RPMRP_CRITPROD_STR, 
MANDT TYPE STRING,
PMRPSIMULATION TYPE STRING,
PMRPFLXBLCSTRTPRODUCTGROUP TYPE STRING,
PRODUCT TYPE STRING,
PLANT TYPE STRING,
MRPAREA TYPE STRING,
PMRPSUPPLYGROUPCATEGORY TYPE STRING,
PMRPSUPPLYGROUP TYPE STRING,
PMRPSOURCEOFSUPPLYINTERNALID TYPE STRING,
BUCKETINTERNALID TYPE STRING,
CONSTRAINTISSUESCRITICALITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPMRP_CRITPROD_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_RPMRP_CRITPROD_STR-MANDT sy-vline 
WA_RPMRP_CRITPROD_STR-PMRPSIMULATION sy-vline 
WA_RPMRP_CRITPROD_STR-PMRPFLXBLCSTRTPRODUCTGROUP sy-vline 
WA_RPMRP_CRITPROD_STR-PRODUCT sy-vline 
WA_RPMRP_CRITPROD_STR-PLANT sy-vline 
WA_RPMRP_CRITPROD_STR-MRPAREA sy-vline 
WA_RPMRP_CRITPROD_STR-PMRPSUPPLYGROUPCATEGORY sy-vline 
WA_RPMRP_CRITPROD_STR-PMRPSUPPLYGROUP sy-vline 
WA_RPMRP_CRITPROD_STR-PMRPSOURCEOFSUPPLYINTERNALID sy-vline 
WA_RPMRP_CRITPROD_STR-BUCKETINTERNALID sy-vline 
WA_RPMRP_CRITPROD_STR-CONSTRAINTISSUESCRITICALITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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