ABAP Select data from SAP table MMPUR_CALCFIELDS_CPO_EKKO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_CALCFIELDS_CPO_EKKO
*  INTO TABLE @DATA(IT_MMPUR_CALCFIELDS_CPO_EKKO2).
*--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_MMPUR_CALCFIELDS_CPO_EKKO INDEX 1 INTO DATA(WA_MMPUR_CALCFIELDS_CPO_EKKO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_CALCFIELDS_CPO_EKKO>-PURCHASEORDERNETAMOUNT = 1.
<MMPUR_CALCFIELDS_CPO_EKKO>-NUMBEROFOVERDUEPURORDERS = 1.
<MMPUR_CALCFIELDS_CPO_EKKO>-NUMBEROFOVERDUEPURORDITM = 1.
<MMPUR_CALCFIELDS_CPO_EKKO>-PURCHASEORDERSTATUS = 1.
<MMPUR_CALCFIELDS_CPO_EKKO>-PURCHASEORDERSTATUSNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_CALCFIELDS_CPO_EKKO-APPROVERUSER, sy-vline,
  WA_MMPUR_CALCFIELDS_CPO_EKKO-APPROVERNAME, sy-vline,
  WA_MMPUR_CALCFIELDS_CPO_EKKO-PURCHASINGPROCESSINGSTATUS, sy-vline,
  WA_MMPUR_CALCFIELDS_CPO_EKKO-SCHEDULELINEDELIVERYDATE, sy-vline,
  WA_MMPUR_CALCFIELDS_CPO_EKKO-PURORDOUTPUTCTRLTYPE, sy-vline,
  WA_MMPUR_CALCFIELDS_CPO_EKKO-PURCHASEORDEROUTPUTSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_CALCFIELDS_CPO_EKKO 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_MMPUR_CALCFIELDS_CPO_EKKO 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_MMPUR_CALCFIELDS_CPO_EKKO INTO WA_MMPUR_CALCFIELDS_CPO_EKKO.


*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_MMPUR_CALCFIELDS_CPO_EKKO_STR, 
PURCHASEORDERNETAMOUNT TYPE STRING,
NUMBEROFOVERDUEPURORDERS TYPE STRING,
NUMBEROFOVERDUEPURORDITM TYPE STRING,
PURCHASEORDERSTATUS TYPE STRING,
PURCHASEORDERSTATUSNAME TYPE STRING,
APPROVERUSER TYPE STRING,
APPROVERNAME TYPE STRING,
PURCHASINGPROCESSINGSTATUS TYPE STRING,
SCHEDULELINEDELIVERYDATE TYPE STRING,
PURORDOUTPUTCTRLTYPE TYPE STRING,
PURCHASEORDEROUTPUTSTATUS TYPE STRING,
PURCHASEORDEROUTPUTSTATUSNAME TYPE STRING,
PURCHASEORDEROUTPUTDATETIME TYPE STRING,
WEIGHTEDRELEVANCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_CALCFIELDS_CPO_EKKO_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_MMPUR_CALCFIELDS_CPO_EKKO_STR-PURCHASEORDERNETAMOUNT sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-NUMBEROFOVERDUEPURORDERS sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-NUMBEROFOVERDUEPURORDITM sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-PURCHASEORDERSTATUS sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-PURCHASEORDERSTATUSNAME sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-APPROVERUSER sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-APPROVERNAME sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-PURCHASINGPROCESSINGSTATUS sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-SCHEDULELINEDELIVERYDATE sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-PURORDOUTPUTCTRLTYPE sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-PURCHASEORDEROUTPUTSTATUS sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-PURCHASEORDEROUTPUTSTATUSNAME sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-PURCHASEORDEROUTPUTDATETIME sy-vline 
WA_MMPUR_CALCFIELDS_CPO_EKKO_STR-WEIGHTEDRELEVANCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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