ABAP Select data from SAP table /CWM/MIG_VALU_PV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /CWM/MIG_VALU_PV 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 /CWM/MIG_VALU_PV. 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 /CWM/MIG_VALU_PV 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_/CWM/MIG_VALU_PV TYPE STANDARD TABLE OF /CWM/MIG_VALU_PV,
      WA_/CWM/MIG_VALU_PV TYPE /CWM/MIG_VALU_PV,
      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: </CWM/MIG_VALU_PV> TYPE /CWM/MIG_VALU_PV.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /CWM/MIG_VALU_PV
  INTO TABLE IT_/CWM/MIG_VALU_PV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /CWM/MIG_VALU_PV
*  INTO TABLE @DATA(IT_/CWM/MIG_VALU_PV2).
*--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_/CWM/MIG_VALU_PV INDEX 1 INTO DATA(WA_/CWM/MIG_VALU_PV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/CWM/MIG_VALU_PV ASSIGNING </CWM/MIG_VALU_PV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</CWM/MIG_VALU_PV>-MANDT = 1.
</CWM/MIG_VALU_PV>-MATNR = 1.
</CWM/MIG_VALU_PV>-BWKEY = 1.
</CWM/MIG_VALU_PV>-BWTAR = 1.
</CWM/MIG_VALU_PV>-LBKUM = 1.

ENDLOOP.

LOOP AT IT_/CWM/MIG_VALU_PV INTO WA_/CWM/MIG_VALU_PV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/CWM/MIG_VALU_PV-SALK3, sy-vline,
  WA_/CWM/MIG_VALU_PV-VPRSV, sy-vline,
  WA_/CWM/MIG_VALU_PV-VERPR, sy-vline,
  WA_/CWM/MIG_VALU_PV-STPRS, sy-vline,
  WA_/CWM/MIG_VALU_PV-PEINH, sy-vline,
  WA_/CWM/MIG_VALU_PV-BKLAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/CWM/MIG_VALU_PV 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_/CWM/MIG_VALU_PV 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_/CWM/MIG_VALU_PV INTO WA_/CWM/MIG_VALU_PV.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/CWM/MIG_VALU_PV-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CWM/MIG_VALU_PV-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_/CWM/MIG_VALU_PV-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CWM/MIG_VALU_PV-LFGJA.
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_/CWM/MIG_VALU_PV_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
LBKUM TYPE STRING,
SALK3 TYPE STRING,
VPRSV TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
PEINH TYPE STRING,
BKLAS TYPE STRING,
SALKV TYPE STRING,
VMPEI TYPE STRING,
VJPEI TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
BWTTY TYPE STRING,
TIMESTAMP TYPE STRING,
KALN1 TYPE STRING,
KALNR TYPE STRING,
MLMAA TYPE STRING,
MLAST TYPE STRING,
VKSAL TYPE STRING,
MTUSE TYPE STRING,
MTORG TYPE STRING,
OWNPR TYPE STRING,
MBRUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/CWM/MIG_VALU_PV_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_/CWM/MIG_VALU_PV_STR-MANDT sy-vline 
WA_/CWM/MIG_VALU_PV_STR-MATNR sy-vline 
WA_/CWM/MIG_VALU_PV_STR-BWKEY sy-vline 
WA_/CWM/MIG_VALU_PV_STR-BWTAR sy-vline 
WA_/CWM/MIG_VALU_PV_STR-LBKUM sy-vline 
WA_/CWM/MIG_VALU_PV_STR-SALK3 sy-vline 
WA_/CWM/MIG_VALU_PV_STR-VPRSV sy-vline 
WA_/CWM/MIG_VALU_PV_STR-VERPR sy-vline 
WA_/CWM/MIG_VALU_PV_STR-STPRS sy-vline 
WA_/CWM/MIG_VALU_PV_STR-PEINH sy-vline 
WA_/CWM/MIG_VALU_PV_STR-BKLAS sy-vline 
WA_/CWM/MIG_VALU_PV_STR-SALKV sy-vline 
WA_/CWM/MIG_VALU_PV_STR-VMPEI sy-vline 
WA_/CWM/MIG_VALU_PV_STR-VJPEI sy-vline 
WA_/CWM/MIG_VALU_PV_STR-LFGJA sy-vline 
WA_/CWM/MIG_VALU_PV_STR-LFMON sy-vline 
WA_/CWM/MIG_VALU_PV_STR-BWTTY sy-vline 
WA_/CWM/MIG_VALU_PV_STR-TIMESTAMP sy-vline 
WA_/CWM/MIG_VALU_PV_STR-KALN1 sy-vline 
WA_/CWM/MIG_VALU_PV_STR-KALNR sy-vline 
WA_/CWM/MIG_VALU_PV_STR-MLMAA sy-vline 
WA_/CWM/MIG_VALU_PV_STR-MLAST sy-vline 
WA_/CWM/MIG_VALU_PV_STR-VKSAL sy-vline 
WA_/CWM/MIG_VALU_PV_STR-MTUSE sy-vline 
WA_/CWM/MIG_VALU_PV_STR-MTORG sy-vline 
WA_/CWM/MIG_VALU_PV_STR-OWNPR sy-vline 
WA_/CWM/MIG_VALU_PV_STR-MBRUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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