ABAP Select data from SAP table WB2_WORKAREA_EXT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WB2_WORKAREA_EXT 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 WB2_WORKAREA_EXT. 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 WB2_WORKAREA_EXT 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_WB2_WORKAREA_EXT TYPE STANDARD TABLE OF WB2_WORKAREA_EXT,
      WA_WB2_WORKAREA_EXT TYPE WB2_WORKAREA_EXT,
      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: <WB2_WORKAREA_EXT> TYPE WB2_WORKAREA_EXT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WB2_WORKAREA_EXT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WB2_WORKAREA_EXT
  INTO TABLE IT_WB2_WORKAREA_EXT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WB2_WORKAREA_EXT
*  INTO TABLE @DATA(IT_WB2_WORKAREA_EXT2).
*--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_WB2_WORKAREA_EXT INDEX 1 INTO DATA(WA_WB2_WORKAREA_EXT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WB2_WORKAREA_EXT ASSIGNING <WB2_WORKAREA_EXT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WB2_WORKAREA_EXT>-EXP_CLASS = 1.
<WB2_WORKAREA_EXT>-ACCOUNT_TYPE = 1.
<WB2_WORKAREA_EXT>-POST_TYPE = 1.
<WB2_WORKAREA_EXT>-WBELN = 1.
<WB2_WORKAREA_EXT>-PARTNER = 1.

ENDLOOP.

LOOP AT IT_WB2_WORKAREA_EXT INTO WA_WB2_WORKAREA_EXT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WB2_WORKAREA_EXT-LFART, sy-vline,
  WA_WB2_WORKAREA_EXT-WFDAT, sy-vline,
  WA_WB2_WORKAREA_EXT-WAERL, sy-vline,
  WA_WB2_WORKAREA_EXT-MWSKZ, sy-vline,
  WA_WB2_WORKAREA_EXT-NETWR, sy-vline,
  WA_WB2_WORKAREA_EXT-XBLNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WB2_WORKAREA_EXT 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_WB2_WORKAREA_EXT 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_WB2_WORKAREA_EXT INTO WA_WB2_WORKAREA_EXT.


*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 WBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_WORKAREA_EXT-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_WORKAREA_EXT-WBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_WORKAREA_EXT-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_WORKAREA_EXT-PARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_WB2_WORKAREA_EXT-WKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_WORKAREA_EXT-WKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER_EXP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_WORKAREA_EXT-PARTNER_EXP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_WORKAREA_EXT-PARTNER_EXP.
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_WB2_WORKAREA_EXT_STR, 
EXP_CLASS TYPE STRING,
ACCOUNT_TYPE TYPE STRING,
POST_TYPE TYPE STRING,
WBELN TYPE STRING,
PARTNER TYPE STRING,
LFART TYPE STRING,
WFDAT TYPE STRING,
WAERL TYPE STRING,
MWSKZ TYPE STRING,
NETWR TYPE STRING,
XBLNR TYPE STRING,
VALDT TYPE STRING,
WKURS TYPE STRING,
ZTERM TYPE STRING,
BEZEI TYPE STRING,
EXP_CALC_TYPE TYPE STRING,
EXP_CLASS_GROUP TYPE STRING,
WB2_PERCENT TYPE STRING,
REF_VALUE TYPE STRING,
REF_VALUE_REF TYPE STRING,
WKURS_DAT TYPE STRING,
TEXT TYPE STRING,
BLDAT TYPE STRING,
KUFIX TYPE STRING,
PARTNER_EXP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WB2_WORKAREA_EXT_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_WB2_WORKAREA_EXT_STR-EXP_CLASS sy-vline 
WA_WB2_WORKAREA_EXT_STR-ACCOUNT_TYPE sy-vline 
WA_WB2_WORKAREA_EXT_STR-POST_TYPE sy-vline 
WA_WB2_WORKAREA_EXT_STR-WBELN sy-vline 
WA_WB2_WORKAREA_EXT_STR-PARTNER sy-vline 
WA_WB2_WORKAREA_EXT_STR-LFART sy-vline 
WA_WB2_WORKAREA_EXT_STR-WFDAT sy-vline 
WA_WB2_WORKAREA_EXT_STR-WAERL sy-vline 
WA_WB2_WORKAREA_EXT_STR-MWSKZ sy-vline 
WA_WB2_WORKAREA_EXT_STR-NETWR sy-vline 
WA_WB2_WORKAREA_EXT_STR-XBLNR sy-vline 
WA_WB2_WORKAREA_EXT_STR-VALDT sy-vline 
WA_WB2_WORKAREA_EXT_STR-WKURS sy-vline 
WA_WB2_WORKAREA_EXT_STR-ZTERM sy-vline 
WA_WB2_WORKAREA_EXT_STR-BEZEI sy-vline 
WA_WB2_WORKAREA_EXT_STR-EXP_CALC_TYPE sy-vline 
WA_WB2_WORKAREA_EXT_STR-EXP_CLASS_GROUP sy-vline 
WA_WB2_WORKAREA_EXT_STR-WB2_PERCENT sy-vline 
WA_WB2_WORKAREA_EXT_STR-REF_VALUE sy-vline 
WA_WB2_WORKAREA_EXT_STR-REF_VALUE_REF sy-vline 
WA_WB2_WORKAREA_EXT_STR-WKURS_DAT sy-vline 
WA_WB2_WORKAREA_EXT_STR-TEXT sy-vline 
WA_WB2_WORKAREA_EXT_STR-BLDAT sy-vline 
WA_WB2_WORKAREA_EXT_STR-KUFIX sy-vline 
WA_WB2_WORKAREA_EXT_STR-PARTNER_EXP sy-vline      INTO ld_text SEPARATED BY SPACE.

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