ABAP Select data from SAP table DIWPS_RV into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIWPS_RV
*  INTO TABLE @DATA(IT_DIWPS_RV2).
*--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_DIWPS_RV INDEX 1 INTO DATA(WA_DIWPS_RV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIWPS_RV>-MANDT = 1.
<DIWPS_RV>-IWERK = 1.
<DIWPS_RV>-REVNR = 1.
<DIWPS_RV>-REVTX = 1.
<DIWPS_RV>-TPLNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIWPS_RV-REVBD, sy-vline,
  WA_DIWPS_RV-REVBZ, sy-vline,
  WA_DIWPS_RV-REVED, sy-vline,
  WA_DIWPS_RV-REVEZ, sy-vline,
  WA_DIWPS_RV-PSPEL, sy-vline,
  WA_DIWPS_RV-AUFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIWPS_RV 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_DIWPS_RV 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_DIWPS_RV INTO WA_DIWPS_RV.


*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 TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_RV-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_RV-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_RV-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_RV-PSPEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_RV-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_RV-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DAUNE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_RV-DAUNE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_RV-DAUNE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ARBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_RV-ARBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_RV-ARBEH.
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_DIWPS_RV_STR, 
MANDT TYPE STRING,
IWERK TYPE STRING,
REVNR TYPE STRING,
REVTX TYPE STRING,
TPLNR TYPE STRING,
REVBD TYPE STRING,
REVBZ TYPE STRING,
REVED TYPE STRING,
REVEZ TYPE STRING,
PSPEL TYPE STRING,
AUFNR TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
VAPLZ TYPE STRING,
VAWRK TYPE STRING,
DTVOR TYPE STRING,
DAUNE TYPE STRING,
ARBEH TYPE STRING,
REVAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIWPS_RV_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_DIWPS_RV_STR-MANDT sy-vline 
WA_DIWPS_RV_STR-IWERK sy-vline 
WA_DIWPS_RV_STR-REVNR sy-vline 
WA_DIWPS_RV_STR-REVTX sy-vline 
WA_DIWPS_RV_STR-TPLNR sy-vline 
WA_DIWPS_RV_STR-REVBD sy-vline 
WA_DIWPS_RV_STR-REVBZ sy-vline 
WA_DIWPS_RV_STR-REVED sy-vline 
WA_DIWPS_RV_STR-REVEZ sy-vline 
WA_DIWPS_RV_STR-PSPEL sy-vline 
WA_DIWPS_RV_STR-AUFNR sy-vline 
WA_DIWPS_RV_STR-AENAM sy-vline 
WA_DIWPS_RV_STR-AEDAT sy-vline 
WA_DIWPS_RV_STR-ERNAM sy-vline 
WA_DIWPS_RV_STR-ERDAT sy-vline 
WA_DIWPS_RV_STR-VAPLZ sy-vline 
WA_DIWPS_RV_STR-VAWRK sy-vline 
WA_DIWPS_RV_STR-DTVOR sy-vline 
WA_DIWPS_RV_STR-DAUNE sy-vline 
WA_DIWPS_RV_STR-ARBEH sy-vline 
WA_DIWPS_RV_STR-REVAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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