ABAP Select data from SAP table MMPUR_A_CCTR_EFFTVPRC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_A_CCTR_EFFTVPRC 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_A_CCTR_EFFTVPRC. 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_A_CCTR_EFFTVPRC 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_A_CCTR_EFFTVPRC TYPE STANDARD TABLE OF MMPUR_A_CCTR_EFFTVPRC,
      WA_MMPUR_A_CCTR_EFFTVPRC TYPE MMPUR_A_CCTR_EFFTVPRC,
      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_A_CCTR_EFFTVPRC> TYPE MMPUR_A_CCTR_EFFTVPRC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_A_CCTR_EFFTVPRC
*  INTO TABLE @DATA(IT_MMPUR_A_CCTR_EFFTVPRC2).
*--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_A_CCTR_EFFTVPRC INDEX 1 INTO DATA(WA_MMPUR_A_CCTR_EFFTVPRC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_A_CCTR_EFFTVPRC>-ACTIVEPURCHASINGDOCUMENT = 1.
<MMPUR_A_CCTR_EFFTVPRC>-PURCHASINGDOCUMENTVERSION = 1.
<MMPUR_A_CCTR_EFFTVPRC>-CENTRALPURCHASECONTRACTITEM = 1.
<MMPUR_A_CCTR_EFFTVPRC>-PROCMTHUBCONTRVALIDITYUUID = 1.
<MMPUR_A_CCTR_EFFTVPRC>-CONDITIONVALIDITYSTARTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_A_CCTR_EFFTVPRC-CONDITIONVALIDITYENDDATE, sy-vline,
  WA_MMPUR_A_CCTR_EFFTVPRC-PROCMTHUBPLANTUNIQUEID, sy-vline,
  WA_MMPUR_A_CCTR_EFFTVPRC-PRMTHBCONTRITMPRICECNDNUUID, sy-vline,
  WA_MMPUR_A_CCTR_EFFTVPRC-CONDITIONTYPE, sy-vline,
  WA_MMPUR_A_CCTR_EFFTVPRC-CONDITIONTEXT, sy-vline,
  WA_MMPUR_A_CCTR_EFFTVPRC-CONDITIONCHANGEREASON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_A_CCTR_EFFTVPRC 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_A_CCTR_EFFTVPRC 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_A_CCTR_EFFTVPRC INTO WA_MMPUR_A_CCTR_EFFTVPRC.


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

*Conversion exit ALPHA, internal->external for field PURCHASINGDOCUMENTVERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_A_CCTR_EFFTVPRC-PURCHASINGDOCUMENTVERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_A_CCTR_EFFTVPRC-PURCHASINGDOCUMENTVERSION.
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_MMPUR_A_CCTR_EFFTVPRC_STR, 
ACTIVEPURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTVERSION TYPE STRING,
CENTRALPURCHASECONTRACTITEM TYPE STRING,
PROCMTHUBCONTRVALIDITYUUID TYPE STRING,
CONDITIONVALIDITYSTARTDATE TYPE STRING,
CONDITIONVALIDITYENDDATE TYPE STRING,
PROCMTHUBPLANTUNIQUEID TYPE STRING,
PRMTHBCONTRITMPRICECNDNUUID TYPE STRING,
CONDITIONTYPE TYPE STRING,
CONDITIONTEXT TYPE STRING,
CONDITIONCHANGEREASON TYPE STRING,
CONDITIONCHANGEREASONTEXT TYPE STRING,
PROCMTHUBCONTRCNDNDOCCRCYAMT TYPE STRING,
DISPLAYCURRENCY TYPE STRING,
PROCMTHUBCONTRISCURRENTVERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_A_CCTR_EFFTVPRC_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_A_CCTR_EFFTVPRC_STR-ACTIVEPURCHASINGDOCUMENT sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-PURCHASINGDOCUMENTVERSION sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-CENTRALPURCHASECONTRACTITEM sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-PROCMTHUBCONTRVALIDITYUUID sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-CONDITIONVALIDITYSTARTDATE sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-CONDITIONVALIDITYENDDATE sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-PROCMTHUBPLANTUNIQUEID sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-PRMTHBCONTRITMPRICECNDNUUID sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-CONDITIONTYPE sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-CONDITIONTEXT sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-CONDITIONCHANGEREASON sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-CONDITIONCHANGEREASONTEXT sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-PROCMTHUBCONTRCNDNDOCCRCYAMT sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-DISPLAYCURRENCY sy-vline 
WA_MMPUR_A_CCTR_EFFTVPRC_STR-PROCMTHUBCONTRISCURRENTVERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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