ABAP Select data from SAP table PCTRCURRCONV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCTRCURRCONV
*  INTO TABLE @DATA(IT_PCTRCURRCONV2).
*--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_PCTRCURRCONV INDEX 1 INTO DATA(WA_PCTRCURRCONV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCTRCURRCONV>-MANDT = 1.
<PCTRCURRCONV>-PURCHASECONTRACT = 1.
<PCTRCURRCONV>-PURCHASECONTRACTITEM = 1.
<PCTRCURRCONV>-RELEASEORDER = 1.
<PCTRCURRCONV>-RELEASEORDERITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCTRCURRCONV-PURCHASINGDOCUMENTCATEGORY, sy-vline,
  WA_PCTRCURRCONV-PURCHASECONTRACTTYPE, sy-vline,
  WA_PCTRCURRCONV-DOCUMENTCURRENCY, sy-vline,
  WA_PCTRCURRCONV-PURCHASECONTRACTTARGETAMOUNT, sy-vline,
  WA_PCTRCURRCONV-RELEASEORDERITEMORDERQUANTITY, sy-vline,
  WA_PCTRCURRCONV-PURCHASECONTRACTCLASSIFICATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCTRCURRCONV 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_PCTRCURRCONV 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_PCTRCURRCONV INTO WA_PCTRCURRCONV.


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

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

*Conversion exit CUNIT, internal->external for field RELEASEORDERITEMQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PCTRCURRCONV-RELEASEORDERITEMQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCTRCURRCONV-RELEASEORDERITEMQUANTITYUNIT.
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_PCTRCURRCONV_STR, 
MANDT TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
RELEASEORDER TYPE STRING,
RELEASEORDERITEM TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
PURCHASECONTRACTTYPE TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
PURCHASECONTRACTTARGETAMOUNT TYPE STRING,
RELEASEORDERITEMORDERQUANTITY TYPE STRING,
PURCHASECONTRACTCLASSIFICATION TYPE STRING,
CONSUMEDVALUEFORQUANTITY TYPE STRING,
TARGETAMOUNT TYPE STRING,
RELEASEORDERCURRENCY TYPE STRING,
RELEASEORDERITEMNETAMOUNT TYPE STRING,
RELEASEORDERITEMISDELETED TYPE STRING,
RELEASEORDERITEMLASTCHGDATE TYPE STRING,
RELEASEORDERITEMQUANTITYUNIT TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCTRCURRCONV_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_PCTRCURRCONV_STR-MANDT sy-vline 
WA_PCTRCURRCONV_STR-PURCHASECONTRACT sy-vline 
WA_PCTRCURRCONV_STR-PURCHASECONTRACTITEM sy-vline 
WA_PCTRCURRCONV_STR-RELEASEORDER sy-vline 
WA_PCTRCURRCONV_STR-RELEASEORDERITEM sy-vline 
WA_PCTRCURRCONV_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_PCTRCURRCONV_STR-PURCHASECONTRACTTYPE sy-vline 
WA_PCTRCURRCONV_STR-DOCUMENTCURRENCY sy-vline 
WA_PCTRCURRCONV_STR-PURCHASECONTRACTTARGETAMOUNT sy-vline 
WA_PCTRCURRCONV_STR-RELEASEORDERITEMORDERQUANTITY sy-vline 
WA_PCTRCURRCONV_STR-PURCHASECONTRACTCLASSIFICATION sy-vline 
WA_PCTRCURRCONV_STR-CONSUMEDVALUEFORQUANTITY sy-vline 
WA_PCTRCURRCONV_STR-TARGETAMOUNT sy-vline 
WA_PCTRCURRCONV_STR-RELEASEORDERCURRENCY sy-vline 
WA_PCTRCURRCONV_STR-RELEASEORDERITEMNETAMOUNT sy-vline 
WA_PCTRCURRCONV_STR-RELEASEORDERITEMISDELETED sy-vline 
WA_PCTRCURRCONV_STR-RELEASEORDERITEMLASTCHGDATE sy-vline 
WA_PCTRCURRCONV_STR-RELEASEORDERITEMQUANTITYUNIT sy-vline 
WA_PCTRCURRCONV_STR-VALIDITYSTARTDATE sy-vline 
WA_PCTRCURRCONV_STR-VALIDITYENDDATE sy-vline 
WA_PCTRCURRCONV_STR-CREATEDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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