ABAP Select data from SAP table WB2_TOCR_RQ_IT_PUR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WB2_TOCR_RQ_IT_PUR 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_TOCR_RQ_IT_PUR. 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_TOCR_RQ_IT_PUR 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_TOCR_RQ_IT_PUR TYPE STANDARD TABLE OF WB2_TOCR_RQ_IT_PUR,
      WA_WB2_TOCR_RQ_IT_PUR TYPE WB2_TOCR_RQ_IT_PUR,
      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_TOCR_RQ_IT_PUR> TYPE WB2_TOCR_RQ_IT_PUR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WB2_TOCR_RQ_IT_PUR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WB2_TOCR_RQ_IT_PUR
  INTO TABLE IT_WB2_TOCR_RQ_IT_PUR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WB2_TOCR_RQ_IT_PUR
*  INTO TABLE @DATA(IT_WB2_TOCR_RQ_IT_PUR2).
*--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_TOCR_RQ_IT_PUR INDEX 1 INTO DATA(WA_WB2_TOCR_RQ_IT_PUR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WB2_TOCR_RQ_IT_PUR ASSIGNING <WB2_TOCR_RQ_IT_PUR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WB2_TOCR_RQ_IT_PUR>-CONTROLLER = 1.
<WB2_TOCR_RQ_IT_PUR>-SELLER_REFERENCE_ID = 1.
<WB2_TOCR_RQ_IT_PUR>-EXCHANGE_RATE_TYPE_CODE = 1.
<WB2_TOCR_RQ_IT_PUR>-EXCHANGE_RATE = 1.
<WB2_TOCR_RQ_IT_PUR>-CONTROLLER = 1.

ENDLOOP.

LOOP AT IT_WB2_TOCR_RQ_IT_PUR INTO WA_WB2_TOCR_RQ_IT_PUR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WB2_TOCR_RQ_IT_PUR-UNIT_CURRENCY, sy-vline,
  WA_WB2_TOCR_RQ_IT_PUR-QUOTED_CURRENCY, sy-vline,
  WA_WB2_TOCR_RQ_IT_PUR-RATE, sy-vline,
  WA_WB2_TOCR_RQ_IT_PUR-QUOTATION_DATE_TIME, sy-vline,
  WA_WB2_TOCR_RQ_IT_PUR-CASH_DISC_DEDUCT_INDICATOR, sy-vline,
  WA_WB2_TOCR_RQ_IT_PUR-PRICE_DETERMINATION_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WB2_TOCR_RQ_IT_PUR 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_TOCR_RQ_IT_PUR 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_TOCR_RQ_IT_PUR INTO WA_WB2_TOCR_RQ_IT_PUR.


*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_WB2_TOCR_RQ_IT_PUR_STR, 
CONTROLLER TYPE STRING,
SELLER_REFERENCE_ID TYPE STRING,
EXCHANGE_RATE_TYPE_CODE TYPE STRING,
EXCHANGE_RATE TYPE STRING,
CONTROLLER TYPE STRING,
UNIT_CURRENCY TYPE STRING,
QUOTED_CURRENCY TYPE STRING,
RATE TYPE STRING,
QUOTATION_DATE_TIME TYPE STRING,
CASH_DISC_DEDUCT_INDICATOR TYPE STRING,
PRICE_DETERMINATION_DATE TYPE STRING,
DATE TYPE STRING,
QUOTATION_VALIDITY_START_DATE TYPE STRING,
DELIVERY_DATE TYPE STRING,
SCHEDULE_LINE TYPE STRING,
DELIVERY_TERMS TYPE STRING,
CONTROLLER TYPE STRING,
INCOTERMS TYPE STRING,
CONTROLLER TYPE STRING,
CLASSIFICATION_CODE TYPE STRING,
TRANSFER_LOCATION_NAME TYPE STRING,
QUANTITY_TOLERANCE TYPE STRING,
CONTROLLER TYPE STRING,
OVER_PERCENT TYPE STRING,
OVER_PERCENT_UNLIMTD_INDICATOR TYPE STRING,
UNDER_PERCENT TYPE STRING,
CASH_DISCOUNT_TERMS TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
DUE_DATE TYPE STRING,
PRICING_TERMS TYPE STRING,
CONFIG_PROPERTY_VALUATION TYPE STRING,
TOTAL_VALUES TYPE STRING,
CONTROLLER TYPE STRING,
QUANTITY TYPE STRING,
CONTROLLER TYPE STRING,
UNIT_CODE TYPE STRING,
CONTENT TYPE STRING,
NET_PRICE TYPE STRING,
CONTROLLER TYPE STRING,
AMOUNT TYPE STRING,
CONTROLLER TYPE STRING,
CURRENCY_CODE TYPE STRING,
CONTENT TYPE STRING,
BASE_QUANTITY TYPE STRING,
CONTROLLER TYPE STRING,
UNIT_CODE TYPE STRING,
CONTENT TYPE STRING,
BASE_QUANTITY_TYPE_CODE TYPE STRING,
GROSS_WEIGHT_MEASURE TYPE STRING,
CONTROLLER TYPE STRING,
UNIT_CODE TYPE STRING,
CONTENT TYPE STRING,
NET_WEIGHT_MEASURE TYPE STRING,
CONTROLLER TYPE STRING,
UNIT_CODE TYPE STRING,
CONTENT TYPE STRING,
VOLUME_MEASURE TYPE STRING,
CONTROLLER TYPE STRING,
UNIT_CODE TYPE STRING,
CONTENT TYPE STRING,
COMMODITY_FUTURE_ITEM TYPE STRING,
EXCHANGE_RATE_FIXED_INDICATOR TYPE STRING,
VALIDITY_START_DATE TYPE STRING,
VALIDITY_END_DATE TYPE STRING,
PPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WB2_TOCR_RQ_IT_PUR_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_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-SELLER_REFERENCE_ID sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-EXCHANGE_RATE_TYPE_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-EXCHANGE_RATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-UNIT_CURRENCY sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-QUOTED_CURRENCY sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-RATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-QUOTATION_DATE_TIME sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CASH_DISC_DEDUCT_INDICATOR sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-PRICE_DETERMINATION_DATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-DATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-QUOTATION_VALIDITY_START_DATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-DELIVERY_DATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-SCHEDULE_LINE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-DELIVERY_TERMS sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-INCOTERMS sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CLASSIFICATION_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-TRANSFER_LOCATION_NAME sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-QUANTITY_TOLERANCE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-OVER_PERCENT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-OVER_PERCENT_UNLIMTD_INDICATOR sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-UNDER_PERCENT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CASH_DISCOUNT_TERMS sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-DUE_DATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-PRICING_TERMS sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONFIG_PROPERTY_VALUATION sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-TOTAL_VALUES sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-QUANTITY sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-UNIT_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTENT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-NET_PRICE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-AMOUNT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CURRENCY_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTENT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-BASE_QUANTITY sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-UNIT_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTENT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-BASE_QUANTITY_TYPE_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-GROSS_WEIGHT_MEASURE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-UNIT_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTENT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-NET_WEIGHT_MEASURE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-UNIT_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTENT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-VOLUME_MEASURE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTROLLER sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-UNIT_CODE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-CONTENT sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-COMMODITY_FUTURE_ITEM sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-EXCHANGE_RATE_FIXED_INDICATOR sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-VALIDITY_START_DATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-VALIDITY_END_DATE sy-vline 
WA_WB2_TOCR_RQ_IT_PUR_STR-PPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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