ABAP Select data from SAP table /MDG/_S_IS_PP_PCTR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /MDG/_S_IS_PP_PCTR 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 /MDG/_S_IS_PP_PCTR. 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 /MDG/_S_IS_PP_PCTR 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_/MDG/_S_IS_PP_PCTR TYPE STANDARD TABLE OF /MDG/_S_IS_PP_PCTR,
      WA_/MDG/_S_IS_PP_PCTR TYPE /MDG/_S_IS_PP_PCTR,
      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: </MDG/_S_IS_PP_PCTR> TYPE /MDG/_S_IS_PP_PCTR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /MDG/_S_IS_PP_PCTR
  INTO TABLE IT_/MDG/_S_IS_PP_PCTR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MDG/_S_IS_PP_PCTR
*  INTO TABLE @DATA(IT_/MDG/_S_IS_PP_PCTR2).
*--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_/MDG/_S_IS_PP_PCTR INDEX 1 INTO DATA(WA_/MDG/_S_IS_PP_PCTR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/MDG/_S_IS_PP_PCTR ASSIGNING </MDG/_S_IS_PP_PCTR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MDG/_S_IS_PP_PCTR>-COAREA = 1.
</MDG/_S_IS_PP_PCTR>-SYSTEM = 1.
</MDG/_S_IS_PP_PCTR>-PCTR = 1.
</MDG/_S_IS_PP_PCTR>-APCTRRESP = 1.
</MDG/_S_IS_PP_PCTR>-APCTRRTX = 1.

ENDLOOP.

LOOP AT IT_/MDG/_S_IS_PP_PCTR INTO WA_/MDG/_S_IS_PP_PCTR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MDG/_S_IS_PP_PCTR-APCTRSEG, sy-vline,
  WA_/MDG/_S_IS_PP_PCTR-FDATEPCTR, sy-vline,
  WA_/MDG/_S_IS_PP_PCTR-NUPDDEPT, sy-vline,
  WA_/MDG/_S_IS_PP_PCTR-NUPDLTEXT, sy-vline,
  WA_/MDG/_S_IS_PP_PCTR-NUPDNAME, sy-vline,
  WA_/MDG/_S_IS_PP_PCTR-NUPDRESPP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MDG/_S_IS_PP_PCTR 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_/MDG/_S_IS_PP_PCTR 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_/MDG/_S_IS_PP_PCTR INTO WA_/MDG/_S_IS_PP_PCTR.


*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 SYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MDG/_S_IS_PP_PCTR-SYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MDG/_S_IS_PP_PCTR-SYSTEM.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field PCTRPCTRN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MDG/_S_IS_PP_PCTR-PCTRPCTRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MDG/_S_IS_PP_PCTR-PCTRPCTRN.
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_/MDG/_S_IS_PP_PCTR_STR, 
COAREA TYPE STRING,
SYSTEM TYPE STRING,
PCTR TYPE STRING,
APCTRRESP TYPE STRING,
APCTRRTX TYPE STRING,
APCTRSEG TYPE STRING,
FDATEPCTR TYPE STRING,
NUPDDEPT TYPE STRING,
NUPDLTEXT TYPE STRING,
NUPDNAME TYPE STRING,
NUPDRESPP TYPE STRING,
NUPDRESPU TYPE STRING,
NUPDSEGM TYPE STRING,
NUPDSTDH TYPE STRING,
PCTRCCALL TYPE STRING,
PCTRDEPT TYPE STRING,
PCTRLKIND TYPE STRING,
PCTRLSYS TYPE STRING,
PCTRLTEXT TYPE STRING,
PCTRNAME TYPE STRING,
PCTRPCTRH TYPE STRING,
PCTRPCTRN TYPE STRING,
PCTRRESPP TYPE STRING,
PCTRTXJCD TYPE STRING,
TDATEPCTR TYPE STRING,
TXTMI TYPE STRING,
TXTSH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MDG/_S_IS_PP_PCTR_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_/MDG/_S_IS_PP_PCTR_STR-COAREA sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-SYSTEM sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTR sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-APCTRRESP sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-APCTRRTX sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-APCTRSEG sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-FDATEPCTR sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-NUPDDEPT sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-NUPDLTEXT sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-NUPDNAME sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-NUPDRESPP sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-NUPDRESPU sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-NUPDSEGM sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-NUPDSTDH sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRCCALL sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRDEPT sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRLKIND sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRLSYS sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRLTEXT sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRNAME sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRPCTRH sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRPCTRN sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRRESPP sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-PCTRTXJCD sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-TDATEPCTR sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-TXTMI sy-vline 
WA_/MDG/_S_IS_PP_PCTR_STR-TXTSH sy-vline      INTO ld_text SEPARATED BY SPACE.

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