ABAP Select data from SAP table HRV_RHABLAUF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRV_RHABLAUF
*  INTO TABLE @DATA(IT_HRV_RHABLAUF2).
*--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_HRV_RHABLAUF INDEX 1 INTO DATA(WA_HRV_RHABLAUF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRV_RHABLAUF>-EVETY = 1.
<HRV_RHABLAUF>-EVEID = 1.
<HRV_RHABLAUF>-EVSHT = 1.
<HRV_RHABLAUF>-EVSTX = 1.
<HRV_RHABLAUF>-EVBEG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRV_RHABLAUF-EVEND, sy-vline,
  WA_HRV_RHABLAUF-DAYNR, sy-vline,
  WA_HRV_RHABLAUF-DAYDATE, sy-vline,
  WA_HRV_RHABLAUF-DAYTXT, sy-vline,
  WA_HRV_RHABLAUF-BEGUZ, sy-vline,
  WA_HRV_RHABLAUF-ENDUZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRV_RHABLAUF 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_HRV_RHABLAUF 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_HRV_RHABLAUF INTO WA_HRV_RHABLAUF.


*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_HRV_RHABLAUF_STR, 
EVETY TYPE STRING,
EVEID TYPE STRING,
EVSHT TYPE STRING,
EVSTX TYPE STRING,
EVBEG TYPE STRING,
EVEND TYPE STRING,
DAYNR TYPE STRING,
DAYDATE TYPE STRING,
DAYTXT TYPE STRING,
BEGUZ TYPE STRING,
ENDUZ TYPE STRING,
NODAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRV_RHABLAUF_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_HRV_RHABLAUF_STR-EVETY sy-vline 
WA_HRV_RHABLAUF_STR-EVEID sy-vline 
WA_HRV_RHABLAUF_STR-EVSHT sy-vline 
WA_HRV_RHABLAUF_STR-EVSTX sy-vline 
WA_HRV_RHABLAUF_STR-EVBEG sy-vline 
WA_HRV_RHABLAUF_STR-EVEND sy-vline 
WA_HRV_RHABLAUF_STR-DAYNR sy-vline 
WA_HRV_RHABLAUF_STR-DAYDATE sy-vline 
WA_HRV_RHABLAUF_STR-DAYTXT sy-vline 
WA_HRV_RHABLAUF_STR-BEGUZ sy-vline 
WA_HRV_RHABLAUF_STR-ENDUZ sy-vline 
WA_HRV_RHABLAUF_STR-NODAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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