ABAP Select data from SAP table IPCREL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IPCREL
*  INTO TABLE @DATA(IT_IPCREL2).
*--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_IPCREL INDEX 1 INTO DATA(WA_IPCREL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IPCREL>-MANDT = 1.
<IPCREL>-PURCHASECONTRACT = 1.
<IPCREL>-OVERDUETOENDPERCENT = 1.
<IPCREL>-WEIGHTEDRELEVANCE = 1.
<IPCREL>-PURCHASECONTRACTCONSUMEDAMOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IPCREL-CONTRACTCONSUMPTIONINPCT, sy-vline,
  WA_IPCREL-PURCONTRACTCNSMPNINPCTVALUE, sy-vline,
  WA_IPCREL-PURCHASECONTRACTCLASSIFICATION, sy-vline,
  WA_IPCREL-PURCHASECONTRACTTYPE, sy-vline,
  WA_IPCREL-VALIDITYSTARTDATE, sy-vline,
  WA_IPCREL-VALIDITYENDDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IPCREL 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_IPCREL 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_IPCREL INTO WA_IPCREL.


*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_IPCREL-PURCHASECONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IPCREL-PURCHASECONTRACT.
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_IPCREL_STR, 
MANDT TYPE STRING,
PURCHASECONTRACT TYPE STRING,
OVERDUETOENDPERCENT TYPE STRING,
WEIGHTEDRELEVANCE TYPE STRING,
PURCHASECONTRACTCONSUMEDAMOUNT TYPE STRING,
CONTRACTCONSUMPTIONINPCT TYPE STRING,
PURCONTRACTCNSMPNINPCTVALUE TYPE STRING,
PURCHASECONTRACTCLASSIFICATION TYPE STRING,
PURCHASECONTRACTTYPE TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
CREATEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IPCREL_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_IPCREL_STR-MANDT sy-vline 
WA_IPCREL_STR-PURCHASECONTRACT sy-vline 
WA_IPCREL_STR-OVERDUETOENDPERCENT sy-vline 
WA_IPCREL_STR-WEIGHTEDRELEVANCE sy-vline 
WA_IPCREL_STR-PURCHASECONTRACTCONSUMEDAMOUNT sy-vline 
WA_IPCREL_STR-CONTRACTCONSUMPTIONINPCT sy-vline 
WA_IPCREL_STR-PURCONTRACTCNSMPNINPCTVALUE sy-vline 
WA_IPCREL_STR-PURCHASECONTRACTCLASSIFICATION sy-vline 
WA_IPCREL_STR-PURCHASECONTRACTTYPE sy-vline 
WA_IPCREL_STR-VALIDITYSTARTDATE sy-vline 
WA_IPCREL_STR-VALIDITYENDDATE sy-vline 
WA_IPCREL_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_IPCREL_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.