ABAP Select data from SAP table SMC_S_PURCHDATA_X into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMC_S_PURCHDATA_X
*  INTO TABLE @DATA(IT_SMC_S_PURCHDATA_X2).
*--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_SMC_S_PURCHDATA_X INDEX 1 INTO DATA(WA_SMC_S_PURCHDATA_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMC_S_PURCHDATA_X>-CHANGE_MODE = 1.
<SMC_S_PURCHDATA_X>-LOGSYS = 1.
<SMC_S_PURCHDATA_X>-ERP_EKORG = 1.
<SMC_S_PURCHDATA_X>-BBP_EKORG = 1.
<SMC_S_PURCHDATA_X>-PO_CURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMC_S_PURCHDATA_X-PAYMENT_TERMS, sy-vline,
  WA_SMC_S_PURCHDATA_X-GR_BASEDIV, sy-vline,
  WA_SMC_S_PURCHDATA_X-ERS, sy-vline,
  WA_SMC_S_PURCHDATA_X-SEND_MEDIUM, sy-vline,
  WA_SMC_S_PURCHDATA_X-OWN_ACCOUNT_NO, sy-vline,
  WA_SMC_S_PURCHDATA_X-INVOICE_CONFEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMC_S_PURCHDATA_X 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_SMC_S_PURCHDATA_X 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_SMC_S_PURCHDATA_X INTO WA_SMC_S_PURCHDATA_X.


*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_SMC_S_PURCHDATA_X_STR, 
CHANGE_MODE TYPE STRING,
LOGSYS TYPE STRING,
ERP_EKORG TYPE STRING,
BBP_EKORG TYPE STRING,
PO_CURRENCY TYPE STRING,
PAYMENT_TERMS TYPE STRING,
GR_BASEDIV TYPE STRING,
ERS TYPE STRING,
SEND_MEDIUM TYPE STRING,
OWN_ACCOUNT_NO TYPE STRING,
INVOICE_CONFEX TYPE STRING,
GOODSREC_CONFEX TYPE STRING,
ORDER_RESP_EXP TYPE STRING,
ASN_EXPECTED TYPE STRING,
PURCHASE_BLOCK TYPE STRING,
INCOTERM1 TYPE STRING,
INCOTERM2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMC_S_PURCHDATA_X_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_SMC_S_PURCHDATA_X_STR-CHANGE_MODE sy-vline 
WA_SMC_S_PURCHDATA_X_STR-LOGSYS sy-vline 
WA_SMC_S_PURCHDATA_X_STR-ERP_EKORG sy-vline 
WA_SMC_S_PURCHDATA_X_STR-BBP_EKORG sy-vline 
WA_SMC_S_PURCHDATA_X_STR-PO_CURRENCY sy-vline 
WA_SMC_S_PURCHDATA_X_STR-PAYMENT_TERMS sy-vline 
WA_SMC_S_PURCHDATA_X_STR-GR_BASEDIV sy-vline 
WA_SMC_S_PURCHDATA_X_STR-ERS sy-vline 
WA_SMC_S_PURCHDATA_X_STR-SEND_MEDIUM sy-vline 
WA_SMC_S_PURCHDATA_X_STR-OWN_ACCOUNT_NO sy-vline 
WA_SMC_S_PURCHDATA_X_STR-INVOICE_CONFEX sy-vline 
WA_SMC_S_PURCHDATA_X_STR-GOODSREC_CONFEX sy-vline 
WA_SMC_S_PURCHDATA_X_STR-ORDER_RESP_EXP sy-vline 
WA_SMC_S_PURCHDATA_X_STR-ASN_EXPECTED sy-vline 
WA_SMC_S_PURCHDATA_X_STR-PURCHASE_BLOCK sy-vline 
WA_SMC_S_PURCHDATA_X_STR-INCOTERM1 sy-vline 
WA_SMC_S_PURCHDATA_X_STR-INCOTERM2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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