ABAP Select data from SAP table HRPAFIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRPAFIELDS
*  INTO TABLE @DATA(IT_HRPAFIELDS2).
*--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_HRPAFIELDS INDEX 1 INTO DATA(WA_HRPAFIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRPAFIELDS>-ENDDA = 1.
<HRPAFIELDS>-BEGDA = 1.
<HRPAFIELDS>-SEQNR = 1.
<HRPAFIELDS>-INFTY = 1.
<HRPAFIELDS>-SUBTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRPAFIELDS-TABNAME, sy-vline,
  WA_HRPAFIELDS-FIELDNAME, sy-vline,
  WA_HRPAFIELDS-FIELDTEXT, sy-vline,
  WA_HRPAFIELDS-VALUE, sy-vline,
  WA_HRPAFIELDS-OLD_VALUE, sy-vline,
  WA_HRPAFIELDS-ACTIVE_VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRPAFIELDS 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_HRPAFIELDS 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_HRPAFIELDS INTO WA_HRPAFIELDS.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_HRPAFIELDS-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRPAFIELDS-DATATYPE.
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_HRPAFIELDS_STR, 
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
FIELDTEXT TYPE STRING,
VALUE TYPE STRING,
OLD_VALUE TYPE STRING,
ACTIVE_VALUE TYPE STRING,
TEXT_VALUE TYPE STRING,
TEXT_ACTIVE_VALUE TYPE STRING,
TEXTEXIST TYPE STRING,
CHANGED TYPE STRING,
SCREEN_INPUT TYPE STRING,
OUTPUTLEN TYPE STRING,
WA_OFFSET TYPE STRING,
LENG TYPE STRING,
SELECTED TYPE STRING,
FIELDTYPE TYPE STRING,
EDOPT TYPE STRING,
DELDT TYPE STRING,
ZEITB TYPE STRING,
DATATYPE TYPE STRING,
F4AVAILABL TYPE STRING,
SUBTYBLANK TYPE STRING,
STEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRPAFIELDS_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_HRPAFIELDS_STR-ENDDA sy-vline 
WA_HRPAFIELDS_STR-BEGDA sy-vline 
WA_HRPAFIELDS_STR-SEQNR sy-vline 
WA_HRPAFIELDS_STR-INFTY sy-vline 
WA_HRPAFIELDS_STR-SUBTY sy-vline 
WA_HRPAFIELDS_STR-TABNAME sy-vline 
WA_HRPAFIELDS_STR-FIELDNAME sy-vline 
WA_HRPAFIELDS_STR-FIELDTEXT sy-vline 
WA_HRPAFIELDS_STR-VALUE sy-vline 
WA_HRPAFIELDS_STR-OLD_VALUE sy-vline 
WA_HRPAFIELDS_STR-ACTIVE_VALUE sy-vline 
WA_HRPAFIELDS_STR-TEXT_VALUE sy-vline 
WA_HRPAFIELDS_STR-TEXT_ACTIVE_VALUE sy-vline 
WA_HRPAFIELDS_STR-TEXTEXIST sy-vline 
WA_HRPAFIELDS_STR-CHANGED sy-vline 
WA_HRPAFIELDS_STR-SCREEN_INPUT sy-vline 
WA_HRPAFIELDS_STR-OUTPUTLEN sy-vline 
WA_HRPAFIELDS_STR-WA_OFFSET sy-vline 
WA_HRPAFIELDS_STR-LENG sy-vline 
WA_HRPAFIELDS_STR-SELECTED sy-vline 
WA_HRPAFIELDS_STR-FIELDTYPE sy-vline 
WA_HRPAFIELDS_STR-EDOPT sy-vline 
WA_HRPAFIELDS_STR-DELDT sy-vline 
WA_HRPAFIELDS_STR-ZEITB sy-vline 
WA_HRPAFIELDS_STR-DATATYPE sy-vline 
WA_HRPAFIELDS_STR-F4AVAILABL sy-vline 
WA_HRPAFIELDS_STR-SUBTYBLANK sy-vline 
WA_HRPAFIELDS_STR-STEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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