ABAP Select data from SAP table BIW_ISU_EIDESWTMSGDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BIW_ISU_EIDESWTMSGDATA
*  INTO TABLE @DATA(IT_BIW_ISU_EIDESWTMSGDATA2).
*--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_BIW_ISU_EIDESWTMSGDATA INDEX 1 INTO DATA(WA_BIW_ISU_EIDESWTMSGDATA2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BIW_ISU_EIDESWTMSGDATA-CATEGORY, sy-vline,
  WA_BIW_ISU_EIDESWTMSGDATA-DEXTASKID, sy-vline,
  WA_BIW_ISU_EIDESWTMSGDATA-DIRECTION, sy-vline,
  WA_BIW_ISU_EIDESWTMSGDATA-COMPARTNER, sy-vline,
  WA_BIW_ISU_EIDESWTMSGDATA-IDREFNR, sy-vline,
  WA_BIW_ISU_EIDESWTMSGDATA-METERNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BIW_ISU_EIDESWTMSGDATA 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_BIW_ISU_EIDESWTMSGDATA 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_BIW_ISU_EIDESWTMSGDATA INTO WA_BIW_ISU_EIDESWTMSGDATA.


*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 CUNIT, internal->external for field MAXDEM_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BIW_ISU_EIDESWTMSGDATA-MAXDEM_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_ISU_EIDESWTMSGDATA-MAXDEM_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PRGYCONS_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BIW_ISU_EIDESWTMSGDATA-PRGYCONS_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_ISU_EIDESWTMSGDATA-PRGYCONS_UNIT.
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_BIW_ISU_EIDESWTMSGDATA_STR, 
MANDT TYPE STRING,
SWITCHNUM TYPE STRING,
MSGDATANUM TYPE STRING,
MSGDATE TYPE STRING,
MSGTIME TYPE STRING,
CATEGORY TYPE STRING,
DEXTASKID TYPE STRING,
DIRECTION TYPE STRING,
COMPARTNER TYPE STRING,
IDREFNR TYPE STRING,
METERNR TYPE STRING,
NAME_L TYPE STRING,
NAME_F TYPE STRING,
STREET TYPE STRING,
HOUSENR TYPE STRING,
HOUSENREXT TYPE STRING,
POSTCODE TYPE STRING,
CITY TYPE STRING,
TRANSREASON TYPE STRING,
SETTLRESP TYPE STRING,
METMETHOD TYPE STRING,
PROFILE TYPE STRING,
PROGYEARCONS TYPE STRING,
MAXDEMAND TYPE STRING,
MSGSTATUS TYPE STRING,
PROCSTATUS TYPE STRING,
PROCSTATUSTIMEST TYPE STRING,
MOVEINDATE TYPE STRING,
MOVEOUTDATE TYPE STRING,
EXT_UI TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
STREET_BU TYPE STRING,
HOUSENR_BU TYPE STRING,
HOUSENREXT_BU TYPE STRING,
POSTCODE_BU TYPE STRING,
CITY_BU TYPE STRING,
SETTLUNITEXT TYPE STRING,
MAXDEM_UNIT TYPE STRING,
PRGYCONS_UNIT TYPE STRING,
MSGDATANUM_BW TYPE STRING,
DEXTASKID_BW TYPE STRING,
RODMUPDMOD TYPE STRING,
LOEVM_BW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BIW_ISU_EIDESWTMSGDATA_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_BIW_ISU_EIDESWTMSGDATA_STR-MANDT sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-SWITCHNUM sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MSGDATANUM sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MSGDATE sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MSGTIME sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-CATEGORY sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-DEXTASKID sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-DIRECTION sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-COMPARTNER sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-IDREFNR sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-METERNR sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-NAME_L sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-NAME_F sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-STREET sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-HOUSENR sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-HOUSENREXT sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-POSTCODE sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-CITY sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-TRANSREASON sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-SETTLRESP sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-METMETHOD sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-PROFILE sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-PROGYEARCONS sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MAXDEMAND sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MSGSTATUS sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-PROCSTATUS sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-PROCSTATUSTIMEST sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MOVEINDATE sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MOVEOUTDATE sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-EXT_UI sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-ERDAT sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-ERNAM sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-AEDAT sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-AENAM sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-BEGRU sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-LOEVM sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-STREET_BU sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-HOUSENR_BU sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-HOUSENREXT_BU sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-POSTCODE_BU sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-CITY_BU sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-SETTLUNITEXT sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MAXDEM_UNIT sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-PRGYCONS_UNIT sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-MSGDATANUM_BW sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-DEXTASKID_BW sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-RODMUPDMOD sy-vline 
WA_BIW_ISU_EIDESWTMSGDATA_STR-LOEVM_BW sy-vline      INTO ld_text SEPARATED BY SPACE.

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