ABAP Select data from SAP table EPDESCPTRB_R into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EPDESCPTRB_R
*  INTO TABLE @DATA(IT_EPDESCPTRB_R2).
*--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_EPDESCPTRB_R INDEX 1 INTO DATA(WA_EPDESCPTRB_R2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EPDESCPTRB_R>-DELEMENT = 1.
<EPDESCPTRB_R>-PRIORITY = 1.
<EPDESCPTRB_R>-DCOMPONENT = 1.
<EPDESCPTRB_R>-ELEMTYPE = 1.
<EPDESCPTRB_R>-DREFTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EPDESCPTRB_R-DOBJTYPE, sy-vline,
  WA_EPDESCPTRB_R-DREFSTRUCT, sy-vline,
  WA_EPDESCPTRB_R-DREFFIELD, sy-vline,
  WA_EPDESCPTRB_R-DTABELEM, sy-vline,
  WA_EPDESCPTRB_R-DOBLIG, sy-vline,
  WA_EPDESCPTRB_R-DCOMPOBLIG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EPDESCPTRB_R 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_EPDESCPTRB_R 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_EPDESCPTRB_R INTO WA_EPDESCPTRB_R.


*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 ALPHA, internal->external for field DLOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EPDESCPTRB_R-DLOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EPDESCPTRB_R-DLOGICALSYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SLOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EPDESCPTRB_R-SLOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EPDESCPTRB_R-SLOGICALSYSTEM.
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_EPDESCPTRB_R_STR, 
DELEMENT TYPE STRING,
PRIORITY TYPE STRING,
DCOMPONENT TYPE STRING,
ELEMTYPE TYPE STRING,
DREFTYPE TYPE STRING,
DOBJTYPE TYPE STRING,
DREFSTRUCT TYPE STRING,
DREFFIELD TYPE STRING,
DTABELEM TYPE STRING,
DOBLIG TYPE STRING,
DCOMPOBLIG TYPE STRING,
SELEMENT TYPE STRING,
SCOMPONENT TYPE STRING,
SREFTYPE TYPE STRING,
SOBJTYPE TYPE STRING,
SREFSTRUCT TYPE STRING,
SREFFIELD TYPE STRING,
STABELEM TYPE STRING,
SLITERAL TYPE STRING,
DLOGICALSYSTEM TYPE STRING,
SLOGICALSYSTEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EPDESCPTRB_R_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_EPDESCPTRB_R_STR-DELEMENT sy-vline 
WA_EPDESCPTRB_R_STR-PRIORITY sy-vline 
WA_EPDESCPTRB_R_STR-DCOMPONENT sy-vline 
WA_EPDESCPTRB_R_STR-ELEMTYPE sy-vline 
WA_EPDESCPTRB_R_STR-DREFTYPE sy-vline 
WA_EPDESCPTRB_R_STR-DOBJTYPE sy-vline 
WA_EPDESCPTRB_R_STR-DREFSTRUCT sy-vline 
WA_EPDESCPTRB_R_STR-DREFFIELD sy-vline 
WA_EPDESCPTRB_R_STR-DTABELEM sy-vline 
WA_EPDESCPTRB_R_STR-DOBLIG sy-vline 
WA_EPDESCPTRB_R_STR-DCOMPOBLIG sy-vline 
WA_EPDESCPTRB_R_STR-SELEMENT sy-vline 
WA_EPDESCPTRB_R_STR-SCOMPONENT sy-vline 
WA_EPDESCPTRB_R_STR-SREFTYPE sy-vline 
WA_EPDESCPTRB_R_STR-SOBJTYPE sy-vline 
WA_EPDESCPTRB_R_STR-SREFSTRUCT sy-vline 
WA_EPDESCPTRB_R_STR-SREFFIELD sy-vline 
WA_EPDESCPTRB_R_STR-STABELEM sy-vline 
WA_EPDESCPTRB_R_STR-SLITERAL sy-vline 
WA_EPDESCPTRB_R_STR-DLOGICALSYSTEM sy-vline 
WA_EPDESCPTRB_R_STR-SLOGICALSYSTEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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