ABAP Select data from SAP table VRMSLA_INVA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VRMSLA_INVA
*  INTO TABLE @DATA(IT_VRMSLA_INVA2).
*--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_VRMSLA_INVA INDEX 1 INTO DATA(WA_VRMSLA_INVA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VRMSLA_INVA>-MANDT = 1.
<VRMSLA_INVA>-LABELID = 1.
<VRMSLA_INVA>-LISTCNT = 1.
<VRMSLA_INVA>-AENNR = 1.
<VRMSLA_INVA>-ITEMCNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VRMSLA_INVA-VALTYPE, sy-vline,
  WA_VRMSLA_INVA-VALUE, sy-vline,
  WA_VRMSLA_INVA-UNIT, sy-vline,
  WA_VRMSLA_INVA-DECIMALS, sy-vline,
  WA_VRMSLA_INVA-KZ, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_VRMSLA_INVA 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_VRMSLA_INVA 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_VRMSLA_INVA INTO WA_VRMSLA_INVA.


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

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

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VRMSLA_INVA-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VRMSLA_INVA-UNIT.
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_VRMSLA_INVA_STR, 
MANDT TYPE STRING,
LABELID TYPE STRING,
LISTCNT TYPE STRING,
AENNR TYPE STRING,
ITEMCNT TYPE STRING,
VALTYPE TYPE STRING,
VALUE TYPE STRING,
UNIT TYPE STRING,
DECIMALS TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VRMSLA_INVA_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_VRMSLA_INVA_STR-MANDT sy-vline 
WA_VRMSLA_INVA_STR-LABELID sy-vline 
WA_VRMSLA_INVA_STR-LISTCNT sy-vline 
WA_VRMSLA_INVA_STR-AENNR sy-vline 
WA_VRMSLA_INVA_STR-ITEMCNT sy-vline 
WA_VRMSLA_INVA_STR-VALTYPE sy-vline 
WA_VRMSLA_INVA_STR-VALUE sy-vline 
WA_VRMSLA_INVA_STR-UNIT sy-vline 
WA_VRMSLA_INVA_STR-DECIMALS sy-vline 
WA_VRMSLA_INVA_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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