ABAP Select data from SAP table IFMRPWTREVDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFMRPWTREVDOC
*  INTO TABLE @DATA(IT_IFMRPWTREVDOC2).
*--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_IFMRPWTREVDOC INDEX 1 INTO DATA(WA_IFMRPWTREVDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFMRPWTREVDOC>-BKPF = 1.
<IFMRPWTREVDOC>-STYPE = 1.
<IFMRPWTREVDOC>-TCODE = 1.
<IFMRPWTREVDOC>-BLDAT = 1.
<IFMRPWTREVDOC>-BLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFMRPWTREVDOC-BUKRS, sy-vline,
  WA_IFMRPWTREVDOC-BUDAT, sy-vline,
  WA_IFMRPWTREVDOC-MONAT, sy-vline,
  WA_IFMRPWTREVDOC-WAERS, sy-vline,
  WA_IFMRPWTREVDOC-KURSF, sy-vline,
  WA_IFMRPWTREVDOC-BELNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFMRPWTREVDOC 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_IFMRPWTREVDOC 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_IFMRPWTREVDOC INTO WA_IFMRPWTREVDOC.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IFMRPWTREVDOC-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFMRPWTREVDOC-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field DBBLG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IFMRPWTREVDOC-DBBLG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFMRPWTREVDOC-DBBLG.
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_IFMRPWTREVDOC_STR, 
BKPF TYPE STRING,
STYPE TYPE STRING,
TCODE TYPE STRING,
BLDAT TYPE STRING,
BLART TYPE STRING,
BUKRS TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
WAERS TYPE STRING,
KURSF TYPE STRING,
BELNR TYPE STRING,
WWERT TYPE STRING,
XBLNR TYPE STRING,
BVORG TYPE STRING,
BKTXT TYPE STRING,
PARGB TYPE STRING,
AUGLV TYPE STRING,
VBUND TYPE STRING,
XMWST TYPE STRING,
DOCID TYPE STRING,
BARCD TYPE STRING,
STODT TYPE STRING,
BRNCH TYPE STRING,
NUMPG TYPE STRING,
STGRD TYPE STRING,
KURSF_M TYPE STRING,
AUGTX TYPE STRING,
XPRFG TYPE STRING,
PSOTY TYPE STRING,
PSOAK TYPE STRING,
PSOKS TYPE STRING,
PSOSG TYPE STRING,
PSOFN TYPE STRING,
LOTKZ TYPE STRING,
XLOTE TYPE STRING,
PSODT TYPE STRING,
PSOTM TYPE STRING,
DBBLG TYPE STRING,
LOTEXNO TYPE STRING,
SENDE TYPE STRING,
BSEG_T TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFMRPWTREVDOC_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_IFMRPWTREVDOC_STR-BKPF sy-vline 
WA_IFMRPWTREVDOC_STR-STYPE sy-vline 
WA_IFMRPWTREVDOC_STR-TCODE sy-vline 
WA_IFMRPWTREVDOC_STR-BLDAT sy-vline 
WA_IFMRPWTREVDOC_STR-BLART sy-vline 
WA_IFMRPWTREVDOC_STR-BUKRS sy-vline 
WA_IFMRPWTREVDOC_STR-BUDAT sy-vline 
WA_IFMRPWTREVDOC_STR-MONAT sy-vline 
WA_IFMRPWTREVDOC_STR-WAERS sy-vline 
WA_IFMRPWTREVDOC_STR-KURSF sy-vline 
WA_IFMRPWTREVDOC_STR-BELNR sy-vline 
WA_IFMRPWTREVDOC_STR-WWERT sy-vline 
WA_IFMRPWTREVDOC_STR-XBLNR sy-vline 
WA_IFMRPWTREVDOC_STR-BVORG sy-vline 
WA_IFMRPWTREVDOC_STR-BKTXT sy-vline 
WA_IFMRPWTREVDOC_STR-PARGB sy-vline 
WA_IFMRPWTREVDOC_STR-AUGLV sy-vline 
WA_IFMRPWTREVDOC_STR-VBUND sy-vline 
WA_IFMRPWTREVDOC_STR-XMWST sy-vline 
WA_IFMRPWTREVDOC_STR-DOCID sy-vline 
WA_IFMRPWTREVDOC_STR-BARCD sy-vline 
WA_IFMRPWTREVDOC_STR-STODT sy-vline 
WA_IFMRPWTREVDOC_STR-BRNCH sy-vline 
WA_IFMRPWTREVDOC_STR-NUMPG sy-vline 
WA_IFMRPWTREVDOC_STR-STGRD sy-vline 
WA_IFMRPWTREVDOC_STR-KURSF_M sy-vline 
WA_IFMRPWTREVDOC_STR-AUGTX sy-vline 
WA_IFMRPWTREVDOC_STR-XPRFG sy-vline 
WA_IFMRPWTREVDOC_STR-PSOTY sy-vline 
WA_IFMRPWTREVDOC_STR-PSOAK sy-vline 
WA_IFMRPWTREVDOC_STR-PSOKS sy-vline 
WA_IFMRPWTREVDOC_STR-PSOSG sy-vline 
WA_IFMRPWTREVDOC_STR-PSOFN sy-vline 
WA_IFMRPWTREVDOC_STR-LOTKZ sy-vline 
WA_IFMRPWTREVDOC_STR-XLOTE sy-vline 
WA_IFMRPWTREVDOC_STR-PSODT sy-vline 
WA_IFMRPWTREVDOC_STR-PSOTM sy-vline 
WA_IFMRPWTREVDOC_STR-DBBLG sy-vline 
WA_IFMRPWTREVDOC_STR-LOTEXNO sy-vline 
WA_IFMRPWTREVDOC_STR-SENDE sy-vline 
WA_IFMRPWTREVDOC_STR-BSEG_T sy-vline      INTO ld_text SEPARATED BY SPACE.

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