ABAP Select data from SAP table CPURCTRPRTNRS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPURCTRPRTNRS
*  INTO TABLE @DATA(IT_CPURCTRPRTNRS2).
*--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_CPURCTRPRTNRS INDEX 1 INTO DATA(WA_CPURCTRPRTNRS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPURCTRPRTNRS>-MANDT = 1.
<CPURCTRPRTNRS>-PURCHASECONTRACT = 1.
<CPURCTRPRTNRS>-PURCHASECONTRACTITEM = 1.
<CPURCTRPRTNRS>-PURCHASINGORGANIZATION = 1.
<CPURCTRPRTNRS>-SUPPLIERSUBRANGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPURCTRPRTNRS-PLANT, sy-vline,
  WA_CPURCTRPRTNRS-PARTNERFUNCTION, sy-vline,
  WA_CPURCTRPRTNRS-PARTNERCOUNTER, sy-vline,
  WA_CPURCTRPRTNRS-PURCHASINGORGANIZATIONFOREDIT, sy-vline,
  WA_CPURCTRPRTNRS-SUPPLIERSUBRANGEFOREDIT, sy-vline,
  WA_CPURCTRPRTNRS-PLANTFOREDIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPURCTRPRTNRS 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_CPURCTRPRTNRS 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_CPURCTRPRTNRS INTO WA_CPURCTRPRTNRS.


*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_CPURCTRPRTNRS-PURCHASECONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPURCTRPRTNRS-PURCHASECONTRACT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PURCHASINGDOCUMENTPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CPURCTRPRTNRS-PURCHASINGDOCUMENTPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPURCTRPRTNRS-PURCHASINGDOCUMENTPARTNER.
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_CPURCTRPRTNRS_STR, 
MANDT TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
SUPPLIERSUBRANGE TYPE STRING,
PLANT TYPE STRING,
PARTNERFUNCTION TYPE STRING,
PARTNERCOUNTER TYPE STRING,
PURCHASINGORGANIZATIONFOREDIT TYPE STRING,
SUPPLIERSUBRANGEFOREDIT TYPE STRING,
PLANTFOREDIT TYPE STRING,
PARTNERFUNCTIONFOREDIT TYPE STRING,
PARTNERCOUNTERFOREDIT TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
PURCHASINGDOCUMENTTYPE TYPE STRING,
PURCHASECONTRACTTYPE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
PURCHASINGDOCUMENTPARTNERTYPE TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERCONTACT TYPE STRING,
EMPLOYMENTINTERNALID TYPE STRING,
DEFAULTPARTNER TYPE STRING,
PURCHASINGDOCUMENTPARTNER TYPE STRING,
PURCHASINGDOCUMENTPARTNERNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPURCTRPRTNRS_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_CPURCTRPRTNRS_STR-MANDT sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASECONTRACT sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASECONTRACTITEM sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASINGORGANIZATION sy-vline 
WA_CPURCTRPRTNRS_STR-SUPPLIERSUBRANGE sy-vline 
WA_CPURCTRPRTNRS_STR-PLANT sy-vline 
WA_CPURCTRPRTNRS_STR-PARTNERFUNCTION sy-vline 
WA_CPURCTRPRTNRS_STR-PARTNERCOUNTER sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASINGORGANIZATIONFOREDIT sy-vline 
WA_CPURCTRPRTNRS_STR-SUPPLIERSUBRANGEFOREDIT sy-vline 
WA_CPURCTRPRTNRS_STR-PLANTFOREDIT sy-vline 
WA_CPURCTRPRTNRS_STR-PARTNERFUNCTIONFOREDIT sy-vline 
WA_CPURCTRPRTNRS_STR-PARTNERCOUNTERFOREDIT sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASINGDOCUMENTTYPE sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASECONTRACTTYPE sy-vline 
WA_CPURCTRPRTNRS_STR-CREATEDBYUSER sy-vline 
WA_CPURCTRPRTNRS_STR-CREATIONDATE sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASINGDOCUMENTPARTNERTYPE sy-vline 
WA_CPURCTRPRTNRS_STR-SUPPLIER sy-vline 
WA_CPURCTRPRTNRS_STR-SUPPLIERCONTACT sy-vline 
WA_CPURCTRPRTNRS_STR-EMPLOYMENTINTERNALID sy-vline 
WA_CPURCTRPRTNRS_STR-DEFAULTPARTNER sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASINGDOCUMENTPARTNER sy-vline 
WA_CPURCTRPRTNRS_STR-PURCHASINGDOCUMENTPARTNERNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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