ABAP Select data from SAP table ALSMSGVALR into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALSMSGVALR
*  INTO TABLE @DATA(IT_ALSMSGVALR2).
*--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_ALSMSGVALR INDEX 1 INTO DATA(WA_ALSMSGVALR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALSMSGVALR>-TID = 1.
<ALSMSGVALR>-MTSYSID = 1.
<ALSMSGVALR>-MTMCNAME = 1.
<ALSMSGVALR>-MTNUMRANGE = 1.
<ALSMSGVALR>-MTUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALSMSGVALR-MTCLASS, sy-vline,
  WA_ALSMSGVALR-MTINDEX, sy-vline,
  WA_ALSMSGVALR-EXTINDEX, sy-vline,
  WA_ALSMSGVALR-RC, sy-vline,
  WA_ALSMSGVALR-VALUE, sy-vline,
  WA_ALSMSGVALR-SMSGVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALSMSGVALR 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_ALSMSGVALR 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_ALSMSGVALR INTO WA_ALSMSGVALR.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ALSMSGVALR_STR, 
TID TYPE STRING,
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
MTNUMRANGE TYPE STRING,
MTUID TYPE STRING,
MTCLASS TYPE STRING,
MTINDEX TYPE STRING,
EXTINDEX TYPE STRING,
RC TYPE STRING,
VALUE TYPE STRING,
SMSGVALUE TYPE STRING,
SMSGDATE TYPE STRING,
SMSGTIME TYPE STRING,
SMSGDUMMY TYPE STRING,
MSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALSMSGVALR_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_ALSMSGVALR_STR-TID sy-vline 
WA_ALSMSGVALR_STR-MTSYSID sy-vline 
WA_ALSMSGVALR_STR-MTMCNAME sy-vline 
WA_ALSMSGVALR_STR-MTNUMRANGE sy-vline 
WA_ALSMSGVALR_STR-MTUID sy-vline 
WA_ALSMSGVALR_STR-MTCLASS sy-vline 
WA_ALSMSGVALR_STR-MTINDEX sy-vline 
WA_ALSMSGVALR_STR-EXTINDEX sy-vline 
WA_ALSMSGVALR_STR-RC sy-vline 
WA_ALSMSGVALR_STR-VALUE sy-vline 
WA_ALSMSGVALR_STR-SMSGVALUE sy-vline 
WA_ALSMSGVALR_STR-SMSGDATE sy-vline 
WA_ALSMSGVALR_STR-SMSGTIME sy-vline 
WA_ALSMSGVALR_STR-SMSGDUMMY sy-vline 
WA_ALSMSGVALR_STR-MSG sy-vline      INTO ld_text SEPARATED BY SPACE.

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