ABAP Select data from SAP table EISU_IL_MD_EDISCOBJ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EISU_IL_MD_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 EISU_IL_MD_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 EISU_IL_MD_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_EISU_IL_MD_EDISCOBJ TYPE STANDARD TABLE OF EISU_IL_MD_EDISCOBJ,
      WA_EISU_IL_MD_EDISCOBJ TYPE EISU_IL_MD_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: <EISU_IL_MD_EDISCOBJ> TYPE EISU_IL_MD_EDISCOBJ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EISU_IL_MD_EDISCOBJ
*  INTO TABLE @DATA(IT_EISU_IL_MD_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_EISU_IL_MD_EDISCOBJ INDEX 1 INTO DATA(WA_EISU_IL_MD_EDISCOBJ2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EISU_IL_MD_EDISCOBJ-LOGIKNR, sy-vline,
  WA_EISU_IL_MD_EDISCOBJ-LOGIKZW, sy-vline,
  WA_EISU_IL_MD_EDISCOBJ-DISCSTATE, sy-vline,
  WA_EISU_IL_MD_EDISCOBJ-NEWDISCNO, sy-vline,
  WA_EISU_IL_MD_EDISCOBJ-VACANTFLAG, sy-vline,
  WA_EISU_IL_MD_EDISCOBJ-AMIFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EISU_IL_MD_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_EISU_IL_MD_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_EISU_IL_MD_EDISCOBJ INTO WA_EISU_IL_MD_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_EISU_IL_MD_EDISCOBJ-DISCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EISU_IL_MD_EDISCOBJ-DISCNO.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field DISCTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EISU_IL_MD_EDISCOBJ-DISCTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EISU_IL_MD_EDISCOBJ-DISCTYPE.
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_EISU_IL_MD_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,
EQUNR TYPE STRING,
OBJTXT TYPE STRING,
OBJCATTXT TYPE STRING,
DISCSTATTXT TYPE STRING,
BIS TYPE STRING,
BIS_TIME TYPE STRING,
DISCACT_BEGIN TYPE STRING,
AB TYPE STRING,
AB_TIME TYPE STRING,
DISCACT_END TYPE STRING,
SELECTED TYPE STRING,
REMOTEDISCONNECT TYPE STRING,
REQUEST_REMOTE TYPE STRING,
SMART_METER TYPE STRING,
SUPPLY_GAR TYPE STRING,
SUPPLY_GARTXT TYPE STRING,
IS_OTHER_USE TYPE STRING,
DISCTYPE TYPE STRING,
DISCTYPET TYPE STRING,
DISCSTATE_ICON TYPE STRING,
IS_CHANGEABLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EISU_IL_MD_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_EISU_IL_MD_EDISCOBJ_STR-MANDT sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCNO sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCOBJ sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCOBJTYP sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-ANLAGE sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-LOGIKNR sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-LOGIKZW sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCSTATE sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-NEWDISCNO sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-VACANTFLAG sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-AMIFLAG sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-AMITRIGGERED sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-REMOV_FLAG sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-REPLACE_DISCOBJ sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-EQUNR sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-OBJTXT sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-OBJCATTXT sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCSTATTXT sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-BIS sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-BIS_TIME sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCACT_BEGIN sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-AB sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-AB_TIME sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCACT_END sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-SELECTED sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-REMOTEDISCONNECT sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-REQUEST_REMOTE sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-SMART_METER sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-SUPPLY_GAR sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-SUPPLY_GARTXT sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-IS_OTHER_USE sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCTYPE sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCTYPET sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-DISCSTATE_ICON sy-vline 
WA_EISU_IL_MD_EDISCOBJ_STR-IS_CHANGEABLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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