ABAP Select data from SAP table WB2_S_TCHEADER_SEL_EXPND into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WB2_S_TCHEADER_SEL_EXPND 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_S_TCHEADER_SEL_EXPND. 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_S_TCHEADER_SEL_EXPND 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_S_TCHEADER_SEL_EXPND TYPE STANDARD TABLE OF WB2_S_TCHEADER_SEL_EXPND,
      WA_WB2_S_TCHEADER_SEL_EXPND TYPE WB2_S_TCHEADER_SEL_EXPND,
      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_S_TCHEADER_SEL_EXPND> TYPE WB2_S_TCHEADER_SEL_EXPND.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WB2_S_TCHEADER_SEL_EXPND.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WB2_S_TCHEADER_SEL_EXPND
  INTO TABLE IT_WB2_S_TCHEADER_SEL_EXPND.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WB2_S_TCHEADER_SEL_EXPND
*  INTO TABLE @DATA(IT_WB2_S_TCHEADER_SEL_EXPND2).
*--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_S_TCHEADER_SEL_EXPND INDEX 1 INTO DATA(WA_WB2_S_TCHEADER_SEL_EXPND2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WB2_S_TCHEADER_SEL_EXPND ASSIGNING <WB2_S_TCHEADER_SEL_EXPND>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WB2_S_TCHEADER_SEL_EXPND>-TKONN = 1.
<WB2_S_TCHEADER_SEL_EXPND>-TKONN_EX = 1.
<WB2_S_TCHEADER_SEL_EXPND>-TCTYP = 1.
<WB2_S_TCHEADER_SEL_EXPND>-TCTYP_NAME = 1.
<WB2_S_TCHEADER_SEL_EXPND>-ERDAT = 1.

ENDLOOP.

LOOP AT IT_WB2_S_TCHEADER_SEL_EXPND INTO WA_WB2_S_TCHEADER_SEL_EXPND.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WB2_S_TCHEADER_SEL_EXPND-EINDT, sy-vline,
  WA_WB2_S_TCHEADER_SEL_EXPND-LPEIN_INT, sy-vline,
  WA_WB2_S_TCHEADER_SEL_EXPND-EDATU_VBAK, sy-vline,
  WA_WB2_S_TCHEADER_SEL_EXPND-PRGRS_VBAK, sy-vline,
  WA_WB2_S_TCHEADER_SEL_EXPND-COMPANY_CODE, sy-vline,
  WA_WB2_S_TCHEADER_SEL_EXPND-COMPANY_CODE_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WB2_S_TCHEADER_SEL_EXPND 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_S_TCHEADER_SEL_EXPND 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_S_TCHEADER_SEL_EXPND INTO WA_WB2_S_TCHEADER_SEL_EXPND.


*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 TKONN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_S_TCHEADER_SEL_EXPND-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_S_TCHEADER_SEL_EXPND-TKONN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ELIFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_S_TCHEADER_SEL_EXPND-ELIFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_S_TCHEADER_SEL_EXPND-ELIFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ELIFN_ITEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_S_TCHEADER_SEL_EXPND-ELIFN_ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_S_TCHEADER_SEL_EXPND-ELIFN_ITEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WB2_S_TCHEADER_SEL_EXPND-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_S_TCHEADER_SEL_EXPND-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field QUANTITY_SALES_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WB2_S_TCHEADER_SEL_EXPND-QUANTITY_SALES_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_S_TCHEADER_SEL_EXPND-QUANTITY_SALES_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field QUANTITY_PURCH_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WB2_S_TCHEADER_SEL_EXPND-QUANTITY_PURCH_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_S_TCHEADER_SEL_EXPND-QUANTITY_PURCH_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_WB2_S_TCHEADER_SEL_EXPND_STR, 
TKONN TYPE STRING,
TKONN_EX TYPE STRING,
TCTYP TYPE STRING,
TCTYP_NAME TYPE STRING,
ERDAT TYPE STRING,
EINDT TYPE STRING,
LPEIN_INT TYPE STRING,
EDATU_VBAK TYPE STRING,
PRGRS_VBAK TYPE STRING,
COMPANY_CODE TYPE STRING,
COMPANY_CODE_NAME TYPE STRING,
TDTPV TYPE STRING,
TDTPC TYPE STRING,
TPOSN TYPE STRING,
ELIFN TYPE STRING,
ELIFN_NAME TYPE STRING,
ELIFN_ITEM TYPE STRING,
ELIFN_ITEM_NAME TYPE STRING,
PLANT TYPE STRING,
PLANT_NAME TYPE STRING,
MATNR TYPE STRING,
MATNR_NAME TYPE STRING,
QUANTITY_SALES TYPE STRING,
QUANTITY_SALES_UNIT TYPE STRING,
VALUE_SALES TYPE STRING,
VALUE_SALES_CURRENCY TYPE STRING,
QUANTITY_PURCH TYPE STRING,
QUANTITY_PURCH_UNIT TYPE STRING,
VALUE_PURCH TYPE STRING,
VALUE_PURCH_CURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WB2_S_TCHEADER_SEL_EXPND_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_S_TCHEADER_SEL_EXPND_STR-TKONN sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-TKONN_EX sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-TCTYP sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-TCTYP_NAME sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-ERDAT sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-EINDT sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-LPEIN_INT sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-EDATU_VBAK sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-PRGRS_VBAK sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-COMPANY_CODE sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-COMPANY_CODE_NAME sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-TDTPV sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-TDTPC sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-TPOSN sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-ELIFN sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-ELIFN_NAME sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-ELIFN_ITEM sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-ELIFN_ITEM_NAME sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-PLANT sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-PLANT_NAME sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-MATNR sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-MATNR_NAME sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-QUANTITY_SALES sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-QUANTITY_SALES_UNIT sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-VALUE_SALES sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-VALUE_SALES_CURRENCY sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-QUANTITY_PURCH sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-QUANTITY_PURCH_UNIT sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-VALUE_PURCH sy-vline 
WA_WB2_S_TCHEADER_SEL_EXPND_STR-VALUE_PURCH_CURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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