ABAP Select data from SAP table /SAPSRM/S_HISTORY_BKEND_PO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPSRM/S_HISTORY_BKEND_PO 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 /SAPSRM/S_HISTORY_BKEND_PO. 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 /SAPSRM/S_HISTORY_BKEND_PO 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_/SAPSRM/S_HISTORY_BKEND_PO TYPE STANDARD TABLE OF /SAPSRM/S_HISTORY_BKEND_PO,
      WA_/SAPSRM/S_HISTORY_BKEND_PO TYPE /SAPSRM/S_HISTORY_BKEND_PO,
      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: </SAPSRM/S_HISTORY_BKEND_PO> TYPE /SAPSRM/S_HISTORY_BKEND_PO.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPSRM/S_HISTORY_BKEND_PO
  INTO TABLE IT_/SAPSRM/S_HISTORY_BKEND_PO.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPSRM/S_HISTORY_BKEND_PO
*  INTO TABLE @DATA(IT_/SAPSRM/S_HISTORY_BKEND_PO2).
*--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_/SAPSRM/S_HISTORY_BKEND_PO INDEX 1 INTO DATA(WA_/SAPSRM/S_HISTORY_BKEND_PO2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPSRM/S_HISTORY_BKEND_PO ASSIGNING </SAPSRM/S_HISTORY_BKEND_PO>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPSRM/S_HISTORY_BKEND_PO>-ITEM_NO = 1.
</SAPSRM/S_HISTORY_BKEND_PO>-QUANTITY = 1.
</SAPSRM/S_HISTORY_BKEND_PO>-PRICE = 1.
</SAPSRM/S_HISTORY_BKEND_PO>-NET_VALUE = 1.
</SAPSRM/S_HISTORY_BKEND_PO>-PO_DATE = 1.

ENDLOOP.

LOOP AT IT_/SAPSRM/S_HISTORY_BKEND_PO INTO WA_/SAPSRM/S_HISTORY_BKEND_PO.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPSRM/S_HISTORY_BKEND_PO-DELIVERY_DATE, sy-vline,
  WA_/SAPSRM/S_HISTORY_BKEND_PO-MATERIAL, sy-vline,
  WA_/SAPSRM/S_HISTORY_BKEND_PO-PLANT, sy-vline,
  WA_/SAPSRM/S_HISTORY_BKEND_PO-MATERIAL_GROUP, sy-vline,
  WA_/SAPSRM/S_HISTORY_BKEND_PO-SUPPLIER, sy-vline,
  WA_/SAPSRM/S_HISTORY_BKEND_PO-PURCHASING_ORGANIZATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPSRM/S_HISTORY_BKEND_PO 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_/SAPSRM/S_HISTORY_BKEND_PO 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_/SAPSRM/S_HISTORY_BKEND_PO INTO WA_/SAPSRM/S_HISTORY_BKEND_PO.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPSRM/S_HISTORY_BKEND_PO-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPSRM/S_HISTORY_BKEND_PO-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field BE_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPSRM/S_HISTORY_BKEND_PO-BE_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPSRM/S_HISTORY_BKEND_PO-BE_LOGSYS.
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_/SAPSRM/S_HISTORY_BKEND_PO_STR, 
ITEM_NO TYPE STRING,
QUANTITY TYPE STRING,
PRICE TYPE STRING,
NET_VALUE TYPE STRING,
PO_DATE TYPE STRING,
DELIVERY_DATE TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
MATERIAL_GROUP TYPE STRING,
SUPPLIER TYPE STRING,
PURCHASING_ORGANIZATION TYPE STRING,
PURCHASING_GROUP TYPE STRING,
PURCHASING_INFO_RECORD TYPE STRING,
ACCOUNTS_ASSIGNMENT TYPE STRING,
ACKNOWLEDGEMENT TYPE STRING,
COMPANY_CODE TYPE STRING,
PO_NUMBER TYPE STRING,
OBJTYPE TYPE STRING,
OBJECT_ID TYPE STRING,
NUMBER_INT TYPE STRING,
BE_LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPSRM/S_HISTORY_BKEND_PO_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_/SAPSRM/S_HISTORY_BKEND_PO_STR-ITEM_NO sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-QUANTITY sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-PRICE sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-NET_VALUE sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-PO_DATE sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-DELIVERY_DATE sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-MATERIAL sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-PLANT sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-MATERIAL_GROUP sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-SUPPLIER sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-PURCHASING_ORGANIZATION sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-PURCHASING_GROUP sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-PURCHASING_INFO_RECORD sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-ACCOUNTS_ASSIGNMENT sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-ACKNOWLEDGEMENT sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-COMPANY_CODE sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-PO_NUMBER sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-OBJTYPE sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-OBJECT_ID sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-NUMBER_INT sy-vline 
WA_/SAPSRM/S_HISTORY_BKEND_PO_STR-BE_LOGSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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