ABAP Select data from SAP table EIDESWITCH_DOC_MSG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EIDESWITCH_DOC_MSG
*  INTO TABLE @DATA(IT_EIDESWITCH_DOC_MSG2).
*--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_EIDESWITCH_DOC_MSG INDEX 1 INTO DATA(WA_EIDESWITCH_DOC_MSG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EIDESWITCH_DOC_MSG>-SWITCHNUM = 1.
<EIDESWITCH_DOC_MSG>-MSGDATANUM = 1.
<EIDESWITCH_DOC_MSG>-MSGDATE = 1.
<EIDESWITCH_DOC_MSG>-MSGTIME = 1.
<EIDESWITCH_DOC_MSG>-CATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EIDESWITCH_DOC_MSG-DIRECTION, sy-vline,
  WA_EIDESWITCH_DOC_MSG-COMPARTNER, sy-vline,
  WA_EIDESWITCH_DOC_MSG-COMPARTNERNAME, sy-vline,
  WA_EIDESWITCH_DOC_MSG-CREATETYPE, sy-vline,
  WA_EIDESWITCH_DOC_MSG-PROCSTATUS, sy-vline,
  WA_EIDESWITCH_DOC_MSG-PROCSTATUSDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EIDESWITCH_DOC_MSG 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_EIDESWITCH_DOC_MSG 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_EIDESWITCH_DOC_MSG INTO WA_EIDESWITCH_DOC_MSG.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EIDESWITCH_DOC_MSG_STR, 
SWITCHNUM TYPE STRING,
MSGDATANUM TYPE STRING,
MSGDATE TYPE STRING,
MSGTIME TYPE STRING,
CATEGORY TYPE STRING,
DIRECTION TYPE STRING,
COMPARTNER TYPE STRING,
COMPARTNERNAME TYPE STRING,
CREATETYPE TYPE STRING,
PROCSTATUS TYPE STRING,
PROCSTATUSDATE TYPE STRING,
PROCSTATUSTIME TYPE STRING,
IDREFNR TYPE STRING,
TRANSREASON TYPE STRING,
METMETHOD TYPE STRING,
PROGYEARCONS TYPE STRING,
MAXDEMAND TYPE STRING,
MSGSTATUS TYPE STRING,
COMMENTFLAG TYPE STRING,
SWITCHMOVEINDATE TYPE STRING,
SWITCHMOVEOUTDATE TYPE STRING,
PARTNERLASTNAME TYPE STRING,
PARTNERFIRSTNAME TYPE STRING,
PREMISESTREET TYPE STRING,
PREMISEHOUSENUMBER TYPE STRING,
PREMISESUPPLHOUSENUMBER TYPE STRING,
PREMISEPOSTALCODE TYPE STRING,
PREMISECITY TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
STREET_BU TYPE STRING,
HOUSENR_BU TYPE STRING,
HOUSENREXT_BU TYPE STRING,
POSTCODE_BU TYPE STRING,
CITY_BU TYPE STRING,
SETTLRESP TYPE STRING,
METERNR TYPE STRING,
PROFILE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EIDESWITCH_DOC_MSG_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_EIDESWITCH_DOC_MSG_STR-SWITCHNUM sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-MSGDATANUM sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-MSGDATE sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-MSGTIME sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-CATEGORY sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-DIRECTION sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-COMPARTNER sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-COMPARTNERNAME sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-CREATETYPE sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PROCSTATUS sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PROCSTATUSDATE sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PROCSTATUSTIME sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-IDREFNR sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-TRANSREASON sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-METMETHOD sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PROGYEARCONS sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-MAXDEMAND sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-MSGSTATUS sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-COMMENTFLAG sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-SWITCHMOVEINDATE sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-SWITCHMOVEOUTDATE sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PARTNERLASTNAME sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PARTNERFIRSTNAME sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PREMISESTREET sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PREMISEHOUSENUMBER sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PREMISESUPPLHOUSENUMBER sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PREMISEPOSTALCODE sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PREMISECITY sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-ERDAT sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-ERNAM sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-AEDAT sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-AENAM sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-STREET_BU sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-HOUSENR_BU sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-HOUSENREXT_BU sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-POSTCODE_BU sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-CITY_BU sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-SETTLRESP sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-METERNR sy-vline 
WA_EIDESWITCH_DOC_MSG_STR-PROFILE sy-vline      INTO ld_text SEPARATED BY SPACE.

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