ABAP Select data from SAP table HRVMSG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRVMSG
*  INTO TABLE @DATA(IT_HRVMSG2).
*--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_HRVMSG INDEX 1 INTO DATA(WA_HRVMSG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRVMSG>-OKEY = 1.
<HRVMSG>-OTEXT = 1.
<HRVMSG>-LKEY = 1.
<HRVMSG>-LSHORT = 1.
<HRVMSG>-LTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRVMSG-DKEY, sy-vline,
  WA_HRVMSG-DSHORT, sy-vline,
  WA_HRVMSG-DTEXT, sy-vline,
  WA_HRVMSG-EKEY, sy-vline,
  WA_HRVMSG-ESHORT, sy-vline,
  WA_HRVMSG-ETEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRVMSG 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_HRVMSG 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_HRVMSG INTO WA_HRVMSG.


*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 ISOLA, internal->external for field HEADER4
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_HRVMSG-HEADER4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRVMSG-HEADER4.
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_HRVMSG_STR, 
OKEY TYPE STRING,
OTEXT TYPE STRING,
LKEY TYPE STRING,
LSHORT TYPE STRING,
LTEXT TYPE STRING,
DKEY TYPE STRING,
DSHORT TYPE STRING,
DTEXT TYPE STRING,
EKEY TYPE STRING,
ESHORT TYPE STRING,
ETEXT TYPE STRING,
AKEY TYPE STRING,
ASHORT TYPE STRING,
ATEXT TYPE STRING,
HEADER1 TYPE STRING,
HEADER2 TYPE STRING,
HEADER3 TYPE STRING,
HEADER4 TYPE STRING,
HEADER5 TYPE STRING,
TEXT3E TYPE STRING,
TEXT5E TYPE STRING,
TEXT7E TYPE STRING,
TEXT4P TYPE STRING,
TEXT6E TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRVMSG_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_HRVMSG_STR-OKEY sy-vline 
WA_HRVMSG_STR-OTEXT sy-vline 
WA_HRVMSG_STR-LKEY sy-vline 
WA_HRVMSG_STR-LSHORT sy-vline 
WA_HRVMSG_STR-LTEXT sy-vline 
WA_HRVMSG_STR-DKEY sy-vline 
WA_HRVMSG_STR-DSHORT sy-vline 
WA_HRVMSG_STR-DTEXT sy-vline 
WA_HRVMSG_STR-EKEY sy-vline 
WA_HRVMSG_STR-ESHORT sy-vline 
WA_HRVMSG_STR-ETEXT sy-vline 
WA_HRVMSG_STR-AKEY sy-vline 
WA_HRVMSG_STR-ASHORT sy-vline 
WA_HRVMSG_STR-ATEXT sy-vline 
WA_HRVMSG_STR-HEADER1 sy-vline 
WA_HRVMSG_STR-HEADER2 sy-vline 
WA_HRVMSG_STR-HEADER3 sy-vline 
WA_HRVMSG_STR-HEADER4 sy-vline 
WA_HRVMSG_STR-HEADER5 sy-vline 
WA_HRVMSG_STR-TEXT3E sy-vline 
WA_HRVMSG_STR-TEXT5E sy-vline 
WA_HRVMSG_STR-TEXT7E sy-vline 
WA_HRVMSG_STR-TEXT4P sy-vline 
WA_HRVMSG_STR-TEXT6E sy-vline      INTO ld_text SEPARATED BY SPACE.

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