ABAP Select data from SAP table SWW_EXCDAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SWW_EXCDAT
*  INTO TABLE @DATA(IT_SWW_EXCDAT2).
*--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_SWW_EXCDAT INDEX 1 INTO DATA(WA_SWW_EXCDAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SWW_EXCDAT>-TYPE = 1.
<SWW_EXCDAT>-RETURN = 1.
<SWW_EXCDAT>-CATID = 1.
<SWW_EXCDAT>-EXCP_TYPE = 1.
<SWW_EXCDAT>-CODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SWW_EXCDAT-ERRORTYPE, sy-vline,
  WA_SWW_EXCDAT-WORKAREA, sy-vline,
  WA_SWW_EXCDAT-MESSAGE, sy-vline,
  WA_SWW_EXCDAT-MSGTYP, sy-vline,
  WA_SWW_EXCDAT-TEXT, sy-vline,
  WA_SWW_EXCDAT-VARIABLE1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SWW_EXCDAT 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_SWW_EXCDAT 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_SWW_EXCDAT INTO WA_SWW_EXCDAT.


*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_SWW_EXCDAT_STR, 
TYPE TYPE STRING,
RETURN TYPE STRING,
CATID TYPE STRING,
EXCP_TYPE TYPE STRING,
CODE TYPE STRING,
ERRORTYPE TYPE STRING,
WORKAREA TYPE STRING,
MESSAGE TYPE STRING,
MSGTYP TYPE STRING,
TEXT TYPE STRING,
VARIABLE1 TYPE STRING,
VARIABLE2 TYPE STRING,
VARIABLE3 TYPE STRING,
VARIABLE4 TYPE STRING,
EXC_CLSNAM TYPE STRING,
EDGE_TYPE TYPE STRING,
SUBRC TYPE STRING,
GUID TYPE STRING,
METHOD_CONTAINER TYPE STRING,
EXCEPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SWW_EXCDAT_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_SWW_EXCDAT_STR-TYPE sy-vline 
WA_SWW_EXCDAT_STR-RETURN sy-vline 
WA_SWW_EXCDAT_STR-CATID sy-vline 
WA_SWW_EXCDAT_STR-EXCP_TYPE sy-vline 
WA_SWW_EXCDAT_STR-CODE sy-vline 
WA_SWW_EXCDAT_STR-ERRORTYPE sy-vline 
WA_SWW_EXCDAT_STR-WORKAREA sy-vline 
WA_SWW_EXCDAT_STR-MESSAGE sy-vline 
WA_SWW_EXCDAT_STR-MSGTYP sy-vline 
WA_SWW_EXCDAT_STR-TEXT sy-vline 
WA_SWW_EXCDAT_STR-VARIABLE1 sy-vline 
WA_SWW_EXCDAT_STR-VARIABLE2 sy-vline 
WA_SWW_EXCDAT_STR-VARIABLE3 sy-vline 
WA_SWW_EXCDAT_STR-VARIABLE4 sy-vline 
WA_SWW_EXCDAT_STR-EXC_CLSNAM sy-vline 
WA_SWW_EXCDAT_STR-EDGE_TYPE sy-vline 
WA_SWW_EXCDAT_STR-SUBRC sy-vline 
WA_SWW_EXCDAT_STR-GUID sy-vline 
WA_SWW_EXCDAT_STR-METHOD_CONTAINER sy-vline 
WA_SWW_EXCDAT_STR-EXCEPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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