ABAP Select data from SAP table HRV1002A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HRV1002A 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 HRV1002A. 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 HRV1002A 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_HRV1002A TYPE STANDARD TABLE OF HRV1002A,
      WA_HRV1002A TYPE HRV1002A,
      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: <HRV1002A> TYPE HRV1002A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HRV1002A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HRV1002A
  INTO TABLE IT_HRV1002A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRV1002A
*  INTO TABLE @DATA(IT_HRV1002A2).
*--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_HRV1002A INDEX 1 INTO DATA(WA_HRV1002A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HRV1002A ASSIGNING <HRV1002A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRV1002A>-MANDT = 1.
<HRV1002A>-PLVAR = 1.
<HRV1002A>-OTYPE = 1.
<HRV1002A>-OBJID = 1.
<HRV1002A>-SUBTY = 1.

ENDLOOP.

LOOP AT IT_HRV1002A INTO WA_HRV1002A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRV1002A-ISTAT, sy-vline,
  WA_HRV1002A-BEGDA, sy-vline,
  WA_HRV1002A-ENDDA, sy-vline,
  WA_HRV1002A-LANGU, sy-vline,
  WA_HRV1002A-FILLER, sy-vline,
  WA_HRV1002A-SEQNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRV1002A 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_HRV1002A 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_HRV1002A INTO WA_HRV1002A.


*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_HRV1002A-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRV1002A-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_HRV1002A_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
LANGU TYPE STRING,
FILLER TYPE STRING,
SEQNR TYPE STRING,
TABSEQNR TYPE STRING,
OTJID TYPE STRING,
TFORMAT TYPE STRING,
TLINE TYPE STRING,
HISTO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRV1002A_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_HRV1002A_STR-MANDT sy-vline 
WA_HRV1002A_STR-PLVAR sy-vline 
WA_HRV1002A_STR-OTYPE sy-vline 
WA_HRV1002A_STR-OBJID sy-vline 
WA_HRV1002A_STR-SUBTY sy-vline 
WA_HRV1002A_STR-ISTAT sy-vline 
WA_HRV1002A_STR-BEGDA sy-vline 
WA_HRV1002A_STR-ENDDA sy-vline 
WA_HRV1002A_STR-LANGU sy-vline 
WA_HRV1002A_STR-FILLER sy-vline 
WA_HRV1002A_STR-SEQNR sy-vline 
WA_HRV1002A_STR-TABSEQNR sy-vline 
WA_HRV1002A_STR-OTJID sy-vline 
WA_HRV1002A_STR-TFORMAT sy-vline 
WA_HRV1002A_STR-TLINE sy-vline 
WA_HRV1002A_STR-HISTO sy-vline      INTO ld_text SEPARATED BY SPACE.

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