ABAP Select data from SAP table EDP21 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 EDP21 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 EDP21. 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 EDP21 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_EDP21 TYPE STANDARD TABLE OF EDP21,
      WA_EDP21 TYPE EDP21,
      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: <EDP21> TYPE EDP21.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_EDP21.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM EDP21
  INTO TABLE IT_EDP21.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EDP21
*  INTO TABLE @DATA(IT_EDP212).
*--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_EDP21 INDEX 1 INTO DATA(WA_EDP212).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_EDP21 ASSIGNING <EDP21>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EDP21>-MANDT = 1.
<EDP21>-SNDPRN = 1.
<EDP21>-SNDPRT = 1.
<EDP21>-SNDPFC = 1.
<EDP21>-MESTYP = 1.

ENDLOOP.

LOOP AT IT_EDP21 INTO WA_EDP21.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EDP21-MESCOD, sy-vline,
  WA_EDP21-MESFCT, sy-vline,
  WA_EDP21-TEST, sy-vline,
  WA_EDP21-EVCODE, sy-vline,
  WA_EDP21-SYNCHK, sy-vline,
  WA_EDP21-METHOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EDP21 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_EDP21 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_EDP21 INTO WA_EDP21.


*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 SNDPRN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EDP21-SNDPRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDP21-SNDPRN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EDIPV, internal->external for field SNDPFC
CALL FUNCTION 'CONVERSION_EXIT_EDIPV_OUTPUT'
  EXPORTING
    input =                      WA_EDP21-SNDPFC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDP21-SNDPFC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field USRLNG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EDP21-USRLNG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDP21-USRLNG.
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_EDP21_STR, 
MANDT TYPE STRING,
SNDPRN TYPE STRING,
SNDPRT TYPE STRING,
SNDPFC TYPE STRING,
MESTYP TYPE STRING,
MESCOD TYPE STRING,
MESFCT TYPE STRING,
TEST TYPE STRING,
EVCODE TYPE STRING,
SYNCHK TYPE STRING,
METHOD TYPE STRING,
USRTYP TYPE STRING,
USRKEY TYPE STRING,
USRLNG TYPE STRING,
INMOD TYPE STRING,
DCART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EDP21_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_EDP21_STR-MANDT sy-vline 
WA_EDP21_STR-SNDPRN sy-vline 
WA_EDP21_STR-SNDPRT sy-vline 
WA_EDP21_STR-SNDPFC sy-vline 
WA_EDP21_STR-MESTYP sy-vline 
WA_EDP21_STR-MESCOD sy-vline 
WA_EDP21_STR-MESFCT sy-vline 
WA_EDP21_STR-TEST sy-vline 
WA_EDP21_STR-EVCODE sy-vline 
WA_EDP21_STR-SYNCHK sy-vline 
WA_EDP21_STR-METHOD sy-vline 
WA_EDP21_STR-USRTYP sy-vline 
WA_EDP21_STR-USRKEY sy-vline 
WA_EDP21_STR-USRLNG sy-vline 
WA_EDP21_STR-INMOD sy-vline 
WA_EDP21_STR-DCART sy-vline      INTO ld_text SEPARATED BY SPACE.

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