ABAP Select data from SAP table ALSMSGRAWV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALSMSGRAWV
*  INTO TABLE @DATA(IT_ALSMSGRAWV2).
*--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_ALSMSGRAWV INDEX 1 INTO DATA(WA_ALSMSGRAWV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALSMSGRAWV>-SMSGVALUE = 1.
<ALSMSGRAWV>-SMSGDATE = 1.
<ALSMSGRAWV>-SMSGTIME = 1.
<ALSMSGRAWV>-SMSGDUMMY = 1.
<ALSMSGRAWV>-MSGCLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALSMSGRAWV-MSGID, sy-vline,
  WA_ALSMSGRAWV-MSGARG1, sy-vline,
  WA_ALSMSGRAWV-ARGTYPE1, sy-vline,
  WA_ALSMSGRAWV-MSGARG2, sy-vline,
  WA_ALSMSGRAWV-ARGTYPE2, sy-vline,
  WA_ALSMSGRAWV-MSGARG3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALSMSGRAWV 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_ALSMSGRAWV 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_ALSMSGRAWV INTO WA_ALSMSGRAWV.


*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_ALSMSGRAWV_STR, 
SMSGVALUE TYPE STRING,
SMSGDATE TYPE STRING,
SMSGTIME TYPE STRING,
SMSGDUMMY TYPE STRING,
MSGCLASS TYPE STRING,
MSGID TYPE STRING,
MSGARG1 TYPE STRING,
ARGTYPE1 TYPE STRING,
MSGARG2 TYPE STRING,
ARGTYPE2 TYPE STRING,
MSGARG3 TYPE STRING,
ARGTYPE3 TYPE STRING,
MSGARG4 TYPE STRING,
ARGTYPE4 TYPE STRING,
MSGTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALSMSGRAWV_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_ALSMSGRAWV_STR-SMSGVALUE sy-vline 
WA_ALSMSGRAWV_STR-SMSGDATE sy-vline 
WA_ALSMSGRAWV_STR-SMSGTIME sy-vline 
WA_ALSMSGRAWV_STR-SMSGDUMMY sy-vline 
WA_ALSMSGRAWV_STR-MSGCLASS sy-vline 
WA_ALSMSGRAWV_STR-MSGID sy-vline 
WA_ALSMSGRAWV_STR-MSGARG1 sy-vline 
WA_ALSMSGRAWV_STR-ARGTYPE1 sy-vline 
WA_ALSMSGRAWV_STR-MSGARG2 sy-vline 
WA_ALSMSGRAWV_STR-ARGTYPE2 sy-vline 
WA_ALSMSGRAWV_STR-MSGARG3 sy-vline 
WA_ALSMSGRAWV_STR-ARGTYPE3 sy-vline 
WA_ALSMSGRAWV_STR-MSGARG4 sy-vline 
WA_ALSMSGRAWV_STR-ARGTYPE4 sy-vline 
WA_ALSMSGRAWV_STR-MSGTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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