ABAP Select data from SAP table ISU_EDISCDVALOBJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU_EDISCDVALOBJ
*  INTO TABLE @DATA(IT_ISU_EDISCDVALOBJ2).
*--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_ISU_EDISCDVALOBJ INDEX 1 INTO DATA(WA_ISU_EDISCDVALOBJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU_EDISCDVALOBJ>-DISCOBJTYP = 1.
<ISU_EDISCDVALOBJ>-ANLAGE = 1.
<ISU_EDISCDVALOBJ>-LOGIKNR = 1.
<ISU_EDISCDVALOBJ>-LOGIKZW = 1.
<ISU_EDISCDVALOBJ>-EQUNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU_EDISCDVALOBJ-GERAET, sy-vline,
  WA_ISU_EDISCDVALOBJ-OBJTYPTEXT, sy-vline,
  WA_ISU_EDISCDVALOBJ-OBJKEYTEXT, sy-vline,
  WA_ISU_EDISCDVALOBJ-OBJTEXT, sy-vline,
  WA_ISU_EDISCDVALOBJ-IS_DISC, sy-vline,
  WA_ISU_EDISCDVALOBJ-IS_OTHER_USE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISU_EDISCDVALOBJ 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_ISU_EDISCDVALOBJ 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_ISU_EDISCDVALOBJ INTO WA_ISU_EDISCDVALOBJ.


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

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

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_ISU_EDISCDVALOBJ-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU_EDISCDVALOBJ-GERAET.
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_ISU_EDISCDVALOBJ_STR, 
DISCOBJTYP TYPE STRING,
ANLAGE TYPE STRING,
LOGIKNR TYPE STRING,
LOGIKZW TYPE STRING,
EQUNR TYPE STRING,
GERAET TYPE STRING,
OBJTYPTEXT TYPE STRING,
OBJKEYTEXT TYPE STRING,
OBJTEXT TYPE STRING,
IS_DISC TYPE STRING,
IS_OTHER_USE TYPE STRING,
IS_NODISCINST TYPE STRING,
IS_NEWDISCNO TYPE STRING,
IS_PART_OF_DISCOR TYPE STRING,
IS_PART_OF_RCORDER TYPE STRING,
IS_PART_OF_REMOVORDER TYPE STRING,
IS_PART_OF_DISCONNECTION TYPE STRING,
IS_PART_OF_RECONNECTION TYPE STRING,
IS_PART_OF_INSTALLATIONORDER TYPE STRING,
IS_PART_OF_REMOVE TYPE STRING,
IS_REPLACED TYPE STRING,
MAX_DISCSTATE TYPE STRING,
IS_RMT_DISCONNECTABLE TYPE STRING,
IS_RMT_DISCONNECTION TYPE STRING,
AMIFLAG TYPE STRING,
AMITRIGGERED TYPE STRING,
SELECTED TYPE STRING,
LOCKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU_EDISCDVALOBJ_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_ISU_EDISCDVALOBJ_STR-DISCOBJTYP sy-vline 
WA_ISU_EDISCDVALOBJ_STR-ANLAGE sy-vline 
WA_ISU_EDISCDVALOBJ_STR-LOGIKNR sy-vline 
WA_ISU_EDISCDVALOBJ_STR-LOGIKZW sy-vline 
WA_ISU_EDISCDVALOBJ_STR-EQUNR sy-vline 
WA_ISU_EDISCDVALOBJ_STR-GERAET sy-vline 
WA_ISU_EDISCDVALOBJ_STR-OBJTYPTEXT sy-vline 
WA_ISU_EDISCDVALOBJ_STR-OBJKEYTEXT sy-vline 
WA_ISU_EDISCDVALOBJ_STR-OBJTEXT sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_DISC sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_OTHER_USE sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_NODISCINST sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_NEWDISCNO sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_PART_OF_DISCOR sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_PART_OF_RCORDER sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_PART_OF_REMOVORDER sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_PART_OF_DISCONNECTION sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_PART_OF_RECONNECTION sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_PART_OF_INSTALLATIONORDER sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_PART_OF_REMOVE sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_REPLACED sy-vline 
WA_ISU_EDISCDVALOBJ_STR-MAX_DISCSTATE sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_RMT_DISCONNECTABLE sy-vline 
WA_ISU_EDISCDVALOBJ_STR-IS_RMT_DISCONNECTION sy-vline 
WA_ISU_EDISCDVALOBJ_STR-AMIFLAG sy-vline 
WA_ISU_EDISCDVALOBJ_STR-AMITRIGGERED sy-vline 
WA_ISU_EDISCDVALOBJ_STR-SELECTED sy-vline 
WA_ISU_EDISCDVALOBJ_STR-LOCKED sy-vline      INTO ld_text SEPARATED BY SPACE.

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