ABAP Select data from SAP table EPDESC_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EPDESC_D
*  INTO TABLE @DATA(IT_EPDESC_D2).
*--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_EPDESC_D INDEX 1 INTO DATA(WA_EPDESC_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EPDESC_D>-NODETYPE = 1.
<EPDESC_D>-AUTONOM = 1.
<EPDESC_D>-NODEEVAL = 1.
<EPDESC_D>-NODEQUALIFY = 1.
<EPDESC_D>-MATERIAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EPDESC_D-VALIDFROM, sy-vline,
  WA_EPDESC_D-VALIDTO, sy-vline,
  WA_EPDESC_D-CREA_USER, sy-vline,
  WA_EPDESC_D-CREA_DATE, sy-vline,
  WA_EPDESC_D-CHAN_USER, sy-vline,
  WA_EPDESC_D-CHAN_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EPDESC_D 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_EPDESC_D 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_EPDESC_D INTO WA_EPDESC_D.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_EPDESC_D-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EPDESC_D-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EPDESC_D-LOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EPDESC_D-LOGICALSYSTEM.
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_EPDESC_D_STR, 
NODETYPE TYPE STRING,
AUTONOM TYPE STRING,
NODEEVAL TYPE STRING,
NODEQUALIFY TYPE STRING,
MATERIAL TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
CREA_USER TYPE STRING,
CREA_DATE TYPE STRING,
CHAN_USER TYPE STRING,
CHAN_DATE TYPE STRING,
REFTYPE TYPE STRING,
TABELEM TYPE STRING,
REFOBJTYPE TYPE STRING,
REFSTRUCT TYPE STRING,
REFFIELD TYPE STRING,
LOGICALSYSTEM TYPE STRING,
RFCDEST TYPE STRING,
ELEMTYPE TYPE STRING,
OBLIGIMP TYPE STRING,
EDITORDER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EPDESC_D_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_EPDESC_D_STR-NODETYPE sy-vline 
WA_EPDESC_D_STR-AUTONOM sy-vline 
WA_EPDESC_D_STR-NODEEVAL sy-vline 
WA_EPDESC_D_STR-NODEQUALIFY sy-vline 
WA_EPDESC_D_STR-MATERIAL sy-vline 
WA_EPDESC_D_STR-VALIDFROM sy-vline 
WA_EPDESC_D_STR-VALIDTO sy-vline 
WA_EPDESC_D_STR-CREA_USER sy-vline 
WA_EPDESC_D_STR-CREA_DATE sy-vline 
WA_EPDESC_D_STR-CHAN_USER sy-vline 
WA_EPDESC_D_STR-CHAN_DATE sy-vline 
WA_EPDESC_D_STR-REFTYPE sy-vline 
WA_EPDESC_D_STR-TABELEM sy-vline 
WA_EPDESC_D_STR-REFOBJTYPE sy-vline 
WA_EPDESC_D_STR-REFSTRUCT sy-vline 
WA_EPDESC_D_STR-REFFIELD sy-vline 
WA_EPDESC_D_STR-LOGICALSYSTEM sy-vline 
WA_EPDESC_D_STR-RFCDEST sy-vline 
WA_EPDESC_D_STR-ELEMTYPE sy-vline 
WA_EPDESC_D_STR-OBLIGIMP sy-vline 
WA_EPDESC_D_STR-EDITORDER sy-vline      INTO ld_text SEPARATED BY SPACE.

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