ABAP Select data from SAP table IHRRELATN into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IHRRELATN
*  INTO TABLE @DATA(IT_IHRRELATN2).
*--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_IHRRELATN INDEX 1 INTO DATA(WA_IHRRELATN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IHRRELATN>-MANDT = 1.
<IHRRELATN>-PLANVERSION = 1.
<IHRRELATN>-OBJECTTYPE = 1.
<IHRRELATN>-HUMRSCEOBJECTID = 1.
<IHRRELATN>-HUMRSCERELSHPSPECIFICATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IHRRELATN-HUMRSCERELATIONSHIP, sy-vline,
  WA_IHRRELATN-STATUS, sy-vline,
  WA_IHRRELATN-STARTDATE, sy-vline,
  WA_IHRRELATN-ENDDATE, sy-vline,
  WA_IHRRELATN-RELATEDOBJECTTYPE, sy-vline,
  WA_IHRRELATN-HUMRSCERELATEDOBJECTID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IHRRELATN 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_IHRRELATN 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_IHRRELATN INTO WA_IHRRELATN.


*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_IHRRELATN_STR, 
MANDT TYPE STRING,
PLANVERSION TYPE STRING,
OBJECTTYPE TYPE STRING,
HUMRSCEOBJECTID TYPE STRING,
HUMRSCERELSHPSPECIFICATION TYPE STRING,
HUMRSCERELATIONSHIP TYPE STRING,
STATUS TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
RELATEDOBJECTTYPE TYPE STRING,
HUMRSCERELATEDOBJECTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IHRRELATN_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_IHRRELATN_STR-MANDT sy-vline 
WA_IHRRELATN_STR-PLANVERSION sy-vline 
WA_IHRRELATN_STR-OBJECTTYPE sy-vline 
WA_IHRRELATN_STR-HUMRSCEOBJECTID sy-vline 
WA_IHRRELATN_STR-HUMRSCERELSHPSPECIFICATION sy-vline 
WA_IHRRELATN_STR-HUMRSCERELATIONSHIP sy-vline 
WA_IHRRELATN_STR-STATUS sy-vline 
WA_IHRRELATN_STR-STARTDATE sy-vline 
WA_IHRRELATN_STR-ENDDATE sy-vline 
WA_IHRRELATN_STR-RELATEDOBJECTTYPE sy-vline 
WA_IHRRELATN_STR-HUMRSCERELATEDOBJECTID sy-vline      INTO ld_text SEPARATED BY SPACE.

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