ABAP Select data from SAP table HRVPREBK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRVPREBK
*  INTO TABLE @DATA(IT_HRVPREBK2).
*--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_HRVPREBK INDEX 1 INTO DATA(WA_HRVPREBK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRVPREBK>-PICK = 1.
<HRVPREBK>-EVETTYP = 1.
<HRVPREBK>-EVETID = 1.
<HRVPREBK>-PARTYP = 1.
<HRVPREBK>-PARTYP_TXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRVPREBK-PARID, sy-vline,
  WA_HRVPREBK-PARSHT, sy-vline,
  WA_HRVPREBK-PARTXT, sy-vline,
  WA_HRVPREBK-EMPTYP, sy-vline,
  WA_HRVPREBK-EMPTYP_TXT, sy-vline,
  WA_HRVPREBK-EMPID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRVPREBK 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_HRVPREBK 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_HRVPREBK INTO WA_HRVPREBK.


*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 LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_HRVPREBK-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRVPREBK-LANGU.
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_HRVPREBK_STR, 
PICK TYPE STRING,
EVETTYP TYPE STRING,
EVETID TYPE STRING,
PARTYP TYPE STRING,
PARTYP_TXT TYPE STRING,
PARID TYPE STRING,
PARSHT TYPE STRING,
PARTXT TYPE STRING,
EMPTYP TYPE STRING,
EMPTYP_TXT TYPE STRING,
EMPID TYPE STRING,
EMPSHT TYPE STRING,
EMPTXT TYPE STRING,
PRIOX TYPE STRING,
MANZL TYPE STRING,
BUDAT TYPE STRING,
LANGU TYPE STRING,
PREBEG TYPE STRING,
PREEND TYPE STRING,
LOCID TYPE STRING,
EVLOC TYPE STRING,
LOCTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRVPREBK_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_HRVPREBK_STR-PICK sy-vline 
WA_HRVPREBK_STR-EVETTYP sy-vline 
WA_HRVPREBK_STR-EVETID sy-vline 
WA_HRVPREBK_STR-PARTYP sy-vline 
WA_HRVPREBK_STR-PARTYP_TXT sy-vline 
WA_HRVPREBK_STR-PARID sy-vline 
WA_HRVPREBK_STR-PARSHT sy-vline 
WA_HRVPREBK_STR-PARTXT sy-vline 
WA_HRVPREBK_STR-EMPTYP sy-vline 
WA_HRVPREBK_STR-EMPTYP_TXT sy-vline 
WA_HRVPREBK_STR-EMPID sy-vline 
WA_HRVPREBK_STR-EMPSHT sy-vline 
WA_HRVPREBK_STR-EMPTXT sy-vline 
WA_HRVPREBK_STR-PRIOX sy-vline 
WA_HRVPREBK_STR-MANZL sy-vline 
WA_HRVPREBK_STR-BUDAT sy-vline 
WA_HRVPREBK_STR-LANGU sy-vline 
WA_HRVPREBK_STR-PREBEG sy-vline 
WA_HRVPREBK_STR-PREEND sy-vline 
WA_HRVPREBK_STR-LOCID sy-vline 
WA_HRVPREBK_STR-EVLOC sy-vline 
WA_HRVPREBK_STR-LOCTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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