ABAP Select data from SAP table HRVCOST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRVCOST
*  INTO TABLE @DATA(IT_HRVCOST2).
*--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_HRVCOST INDEX 1 INTO DATA(WA_HRVCOST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRVCOST>-SCHED = 1.
<HRVCOST>-KOSUB = 1.
<HRVCOST>-MODE = 1.
<HRVCOST>-CANCEL = 1.
<HRVCOST>-BZG_TN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRVCOST-BZG_SM, sy-vline,
  WA_HRVCOST-BZG_ZE, sy-vline,
  WA_HRVCOST-BLGART, sy-vline,
  WA_HRVCOST-FLAG_X, sy-vline,
  WA_HRVCOST-OPTKA, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_HRVCOST 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_HRVCOST 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_HRVCOST INTO WA_HRVCOST.


*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_HRVCOST_STR, 
SCHED TYPE STRING,
KOSUB TYPE STRING,
MODE TYPE STRING,
CANCEL TYPE STRING,
BZG_TN TYPE STRING,
BZG_SM TYPE STRING,
BZG_ZE TYPE STRING,
BLGART TYPE STRING,
FLAG_X TYPE STRING,
OPTKA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRVCOST_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_HRVCOST_STR-SCHED sy-vline 
WA_HRVCOST_STR-KOSUB sy-vline 
WA_HRVCOST_STR-MODE sy-vline 
WA_HRVCOST_STR-CANCEL sy-vline 
WA_HRVCOST_STR-BZG_TN sy-vline 
WA_HRVCOST_STR-BZG_SM sy-vline 
WA_HRVCOST_STR-BZG_ZE sy-vline 
WA_HRVCOST_STR-BLGART sy-vline 
WA_HRVCOST_STR-FLAG_X sy-vline 
WA_HRVCOST_STR-OPTKA sy-vline      INTO ld_text SEPARATED BY SPACE.

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