ABAP Select data from SAP table V_WRPT_MCAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_WRPT_MCAT
*  INTO TABLE @DATA(IT_V_WRPT_MCAT2).
*--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_V_WRPT_MCAT INDEX 1 INTO DATA(WA_V_WRPT_MCAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_WRPT_MCAT>-MANDT = 1.
<V_WRPT_MCAT>-KUNNR = 1.
<V_WRPT_MCAT>-MATNR = 1.
<V_WRPT_MCAT>-STOCK = 1.
<V_WRPT_MCAT>-CHNGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_WRPT_MCAT-PLTIMEPT, sy-vline,
  WA_V_WRPT_MCAT-PLTIMEZONE, sy-vline,
  WA_V_WRPT_MCAT-GRTIMEPT, sy-vline,
  WA_V_WRPT_MCAT-GRTIMEZONE, sy-vline,
  WA_V_WRPT_MCAT-RPLID, sy-vline,
  WA_V_WRPT_MCAT-RPLRQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_WRPT_MCAT 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_V_WRPT_MCAT 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_V_WRPT_MCAT INTO WA_V_WRPT_MCAT.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_V_WRPT_MCAT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_WRPT_MCAT-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_WRPT_MCAT-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_WRPT_MCAT-MEINS.
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_V_WRPT_MCAT_STR, 
MANDT TYPE STRING,
KUNNR TYPE STRING,
MATNR TYPE STRING,
STOCK TYPE STRING,
CHNGE TYPE STRING,
PLTIMEPT TYPE STRING,
PLTIMEZONE TYPE STRING,
GRTIMEPT TYPE STRING,
GRTIMEZONE TYPE STRING,
RPLID TYPE STRING,
RPLRQ TYPE STRING,
RPLST TYPE STRING,
CHCNT TYPE STRING,
ONORD TYPE STRING,
SRP_NPLDAT TYPE STRING,
SRP_CONSUMPTION TYPE STRING,
SRP_RECEIPTS TYPE STRING,
SRP_UMLMC TYPE STRING,
SRP_ARPLRQ TYPE STRING,
SRP_ARPLME TYPE STRING,
SRP_ARESWK TYPE STRING,
SRP_ALIFNR TYPE STRING,
SRP_AEINDT TYPE STRING,
SRP_AUZEIT TYPE STRING,
SRP_FFNR TYPE STRING,
SRP_BRPLRQ TYPE STRING,
SRP_BRPLME TYPE STRING,
SRP_BRESWK TYPE STRING,
SRP_BLIFNR TYPE STRING,
SRP_OBJTYPE TYPE STRING,
SRP_BELNR TYPE STRING,
SRP_POSNR TYPE STRING,
SRP_EINDT TYPE STRING,
SRP_UZEIT TYPE STRING,
SRP_BSTYP TYPE STRING,
SRP_BSART TYPE STRING,
SRP_DC_RQU TYPE STRING,
SRP_DC_CQU TYPE STRING,
SRP_DC_CUN TYPE STRING,
SRP_DC_OBJTYPE TYPE STRING,
SRP_DC_BELNR TYPE STRING,
SRP_DC_POSNR TYPE STRING,
MATKL TYPE STRING,
MEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_WRPT_MCAT_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_V_WRPT_MCAT_STR-MANDT sy-vline 
WA_V_WRPT_MCAT_STR-KUNNR sy-vline 
WA_V_WRPT_MCAT_STR-MATNR sy-vline 
WA_V_WRPT_MCAT_STR-STOCK sy-vline 
WA_V_WRPT_MCAT_STR-CHNGE sy-vline 
WA_V_WRPT_MCAT_STR-PLTIMEPT sy-vline 
WA_V_WRPT_MCAT_STR-PLTIMEZONE sy-vline 
WA_V_WRPT_MCAT_STR-GRTIMEPT sy-vline 
WA_V_WRPT_MCAT_STR-GRTIMEZONE sy-vline 
WA_V_WRPT_MCAT_STR-RPLID sy-vline 
WA_V_WRPT_MCAT_STR-RPLRQ sy-vline 
WA_V_WRPT_MCAT_STR-RPLST sy-vline 
WA_V_WRPT_MCAT_STR-CHCNT sy-vline 
WA_V_WRPT_MCAT_STR-ONORD sy-vline 
WA_V_WRPT_MCAT_STR-SRP_NPLDAT sy-vline 
WA_V_WRPT_MCAT_STR-SRP_CONSUMPTION sy-vline 
WA_V_WRPT_MCAT_STR-SRP_RECEIPTS sy-vline 
WA_V_WRPT_MCAT_STR-SRP_UMLMC sy-vline 
WA_V_WRPT_MCAT_STR-SRP_ARPLRQ sy-vline 
WA_V_WRPT_MCAT_STR-SRP_ARPLME sy-vline 
WA_V_WRPT_MCAT_STR-SRP_ARESWK sy-vline 
WA_V_WRPT_MCAT_STR-SRP_ALIFNR sy-vline 
WA_V_WRPT_MCAT_STR-SRP_AEINDT sy-vline 
WA_V_WRPT_MCAT_STR-SRP_AUZEIT sy-vline 
WA_V_WRPT_MCAT_STR-SRP_FFNR sy-vline 
WA_V_WRPT_MCAT_STR-SRP_BRPLRQ sy-vline 
WA_V_WRPT_MCAT_STR-SRP_BRPLME sy-vline 
WA_V_WRPT_MCAT_STR-SRP_BRESWK sy-vline 
WA_V_WRPT_MCAT_STR-SRP_BLIFNR sy-vline 
WA_V_WRPT_MCAT_STR-SRP_OBJTYPE sy-vline 
WA_V_WRPT_MCAT_STR-SRP_BELNR sy-vline 
WA_V_WRPT_MCAT_STR-SRP_POSNR sy-vline 
WA_V_WRPT_MCAT_STR-SRP_EINDT sy-vline 
WA_V_WRPT_MCAT_STR-SRP_UZEIT sy-vline 
WA_V_WRPT_MCAT_STR-SRP_BSTYP sy-vline 
WA_V_WRPT_MCAT_STR-SRP_BSART sy-vline 
WA_V_WRPT_MCAT_STR-SRP_DC_RQU sy-vline 
WA_V_WRPT_MCAT_STR-SRP_DC_CQU sy-vline 
WA_V_WRPT_MCAT_STR-SRP_DC_CUN sy-vline 
WA_V_WRPT_MCAT_STR-SRP_DC_OBJTYPE sy-vline 
WA_V_WRPT_MCAT_STR-SRP_DC_BELNR sy-vline 
WA_V_WRPT_MCAT_STR-SRP_DC_POSNR sy-vline 
WA_V_WRPT_MCAT_STR-MATKL sy-vline 
WA_V_WRPT_MCAT_STR-MEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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