ABAP Select data from SAP table EDISCOBJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EDISCOBJ
*  INTO TABLE @DATA(IT_EDISCOBJ2).
*--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_EDISCOBJ INDEX 1 INTO DATA(WA_EDISCOBJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EDISCOBJ>-MANDT = 1.
<EDISCOBJ>-DISCNO = 1.
<EDISCOBJ>-DISCOBJ = 1.
<EDISCOBJ>-DISCOBJTYP = 1.
<EDISCOBJ>-ANLAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EDISCOBJ-LOGIKNR, sy-vline,
  WA_EDISCOBJ-LOGIKZW, sy-vline,
  WA_EDISCOBJ-DISCSTATE, sy-vline,
  WA_EDISCOBJ-NEWDISCNO, sy-vline,
  WA_EDISCOBJ-VACANTFLAG, sy-vline,
  WA_EDISCOBJ-AMIFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EDISCOBJ 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_EDISCOBJ 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_EDISCOBJ INTO WA_EDISCOBJ.


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

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

*Conversion exit ALPHA, internal->external for field NEWDISCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EDISCOBJ-NEWDISCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDISCOBJ-NEWDISCNO.
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_EDISCOBJ_STR, 
MANDT TYPE STRING,
DISCNO TYPE STRING,
DISCOBJ TYPE STRING,
DISCOBJTYP TYPE STRING,
ANLAGE TYPE STRING,
LOGIKNR TYPE STRING,
LOGIKZW TYPE STRING,
DISCSTATE TYPE STRING,
NEWDISCNO TYPE STRING,
VACANTFLAG TYPE STRING,
AMIFLAG TYPE STRING,
AMITRIGGERED TYPE STRING,
REMOV_FLAG TYPE STRING,
REPLACE_DISCOBJ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EDISCOBJ_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_EDISCOBJ_STR-MANDT sy-vline 
WA_EDISCOBJ_STR-DISCNO sy-vline 
WA_EDISCOBJ_STR-DISCOBJ sy-vline 
WA_EDISCOBJ_STR-DISCOBJTYP sy-vline 
WA_EDISCOBJ_STR-ANLAGE sy-vline 
WA_EDISCOBJ_STR-LOGIKNR sy-vline 
WA_EDISCOBJ_STR-LOGIKZW sy-vline 
WA_EDISCOBJ_STR-DISCSTATE sy-vline 
WA_EDISCOBJ_STR-NEWDISCNO sy-vline 
WA_EDISCOBJ_STR-VACANTFLAG sy-vline 
WA_EDISCOBJ_STR-AMIFLAG sy-vline 
WA_EDISCOBJ_STR-AMITRIGGERED sy-vline 
WA_EDISCOBJ_STR-REMOV_FLAG sy-vline 
WA_EDISCOBJ_STR-REPLACE_DISCOBJ sy-vline      INTO ld_text SEPARATED BY SPACE.

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