ABAP Select data from SAP table /MVA/AMUVRULEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MVA/AMUVRULEM
*  INTO TABLE @DATA(IT_/MVA/AMUVRULEM2).
*--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_/MVA/AMUVRULEM INDEX 1 INTO DATA(WA_/MVA/AMUVRULEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MVA/AMUVRULEM>-CLIENT = 1.
</MVA/AMUVRULEM>-COUNTRY_CD = 1.
</MVA/AMUVRULEM>-PROC_CD = 1.
</MVA/AMUVRULEM>-MSG_CD = 1.
</MVA/AMUVRULEM>-SEQ_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MVA/AMUVRULEM-FILTER_ID, sy-vline,
  WA_/MVA/AMUVRULEM-AMOUNT_VL, sy-vline,
  WA_/MVA/AMUVRULEM-GROUP_CD, sy-vline,
  WA_/MVA/AMUVRULEM-COMMENT_TT, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_/MVA/AMUVRULEM 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_/MVA/AMUVRULEM 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_/MVA/AMUVRULEM INTO WA_/MVA/AMUVRULEM.


*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 COMMENT_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MVA/AMUVRULEM-COMMENT_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MVA/AMUVRULEM-COMMENT_TT.
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_/MVA/AMUVRULEM_STR, 
CLIENT TYPE STRING,
COUNTRY_CD TYPE STRING,
PROC_CD TYPE STRING,
MSG_CD TYPE STRING,
SEQ_ID TYPE STRING,
FILTER_ID TYPE STRING,
AMOUNT_VL TYPE STRING,
GROUP_CD TYPE STRING,
COMMENT_TT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MVA/AMUVRULEM_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_/MVA/AMUVRULEM_STR-CLIENT sy-vline 
WA_/MVA/AMUVRULEM_STR-COUNTRY_CD sy-vline 
WA_/MVA/AMUVRULEM_STR-PROC_CD sy-vline 
WA_/MVA/AMUVRULEM_STR-MSG_CD sy-vline 
WA_/MVA/AMUVRULEM_STR-SEQ_ID sy-vline 
WA_/MVA/AMUVRULEM_STR-FILTER_ID sy-vline 
WA_/MVA/AMUVRULEM_STR-AMOUNT_VL sy-vline 
WA_/MVA/AMUVRULEM_STR-GROUP_CD sy-vline 
WA_/MVA/AMUVRULEM_STR-COMMENT_TT sy-vline      INTO ld_text SEPARATED BY SPACE.

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