ABAP Select data from SAP table HRPAD_S_OLD_NEW_KEY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRPAD_S_OLD_NEW_KEY
*  INTO TABLE @DATA(IT_HRPAD_S_OLD_NEW_KEY2).
*--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_HRPAD_S_OLD_NEW_KEY INDEX 1 INTO DATA(WA_HRPAD_S_OLD_NEW_KEY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRPAD_S_OLD_NEW_KEY>-OBJECT_KEY = 1.
<HRPAD_S_OLD_NEW_KEY>-OLD_PSKEY = 1.
<HRPAD_S_OLD_NEW_KEY>-PERNR = 1.
<HRPAD_S_OLD_NEW_KEY>-INFTY = 1.
<HRPAD_S_OLD_NEW_KEY>-SUBTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRPAD_S_OLD_NEW_KEY-OBJPS, sy-vline,
  WA_HRPAD_S_OLD_NEW_KEY-SPRPS, sy-vline,
  WA_HRPAD_S_OLD_NEW_KEY-ENDDA, sy-vline,
  WA_HRPAD_S_OLD_NEW_KEY-BEGDA, sy-vline,
  WA_HRPAD_S_OLD_NEW_KEY-SEQNR, sy-vline,
  WA_HRPAD_S_OLD_NEW_KEY-NEW_PSKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRPAD_S_OLD_NEW_KEY 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_HRPAD_S_OLD_NEW_KEY 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_HRPAD_S_OLD_NEW_KEY INTO WA_HRPAD_S_OLD_NEW_KEY.


*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_HRPAD_S_OLD_NEW_KEY_STR, 
OBJECT_KEY TYPE STRING,
OLD_PSKEY TYPE STRING,
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
NEW_PSKEY TYPE STRING,
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
OBJECT_AREA TYPE STRING,
OBJECT_NAME TYPE STRING,
SAVE_SUCCESSFUL TYPE STRING,
OPERA TYPE STRING,
PNNNN TYPE STRING,
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
HISTO TYPE STRING,
ITXEX TYPE STRING,
REFEX TYPE STRING,
ORDEX TYPE STRING,
ITBLD TYPE STRING,
PREAS TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
RESE1 TYPE STRING,
RESE2 TYPE STRING,
GRPVL TYPE STRING,
DATA1 TYPE STRING,
DATA2 TYPE STRING,
DATA3 TYPE STRING,
DATA4 TYPE STRING,
DATA5 TYPE STRING,
DATA6 TYPE STRING,
DATA7 TYPE STRING,
PERNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRPAD_S_OLD_NEW_KEY_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_HRPAD_S_OLD_NEW_KEY_STR-OBJECT_KEY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-OLD_PSKEY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-PERNR sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-INFTY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SUBTY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-OBJPS sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SPRPS sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-ENDDA sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-BEGDA sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SEQNR sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-NEW_PSKEY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-PERNR sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-INFTY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SUBTY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-OBJPS sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SPRPS sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-ENDDA sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-BEGDA sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SEQNR sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-OBJECT_AREA sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-OBJECT_NAME sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SAVE_SUCCESSFUL sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-OPERA sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-PNNNN sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-PERNR sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-INFTY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SUBTY sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-OBJPS sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SPRPS sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-ENDDA sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-BEGDA sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-SEQNR sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-AEDTM sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-UNAME sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-HISTO sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-ITXEX sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-REFEX sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-ORDEX sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-ITBLD sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-PREAS sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-FLAG1 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-FLAG2 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-FLAG3 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-FLAG4 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-RESE1 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-RESE2 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-GRPVL sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-DATA1 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-DATA2 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-DATA3 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-DATA4 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-DATA5 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-DATA6 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-DATA7 sy-vline 
WA_HRPAD_S_OLD_NEW_KEY_STR-PERNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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