ABAP Select data from SAP table PC28D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC28D 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 PC28D. 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 PC28D 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_PC28D TYPE STANDARD TABLE OF PC28D,
      WA_PC28D TYPE PC28D,
      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: <PC28D> TYPE PC28D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC28D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC28D
  INTO TABLE IT_PC28D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC28D
*  INTO TABLE @DATA(IT_PC28D2).
*--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_PC28D INDEX 1 INTO DATA(WA_PC28D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC28D ASSIGNING <PC28D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC28D>-DATUM = 1.
<PC28D>-BEGUZ = 1.
<PC28D>-ENDUZ = 1.
<PC28D>-ALZNR = 1.
<PC28D>-C1ZNR = 1.

ENDLOOP.

LOOP AT IT_PC28D INTO WA_PC28D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC28D-V0TYP, sy-vline,
  WA_PC28D-V0ZNR, sy-vline,
  WA_PC28D-VTKEN, sy-vline,
  WA_PC28D-LGART, sy-vline,
  WA_PC28D-KENN1, sy-vline,
  WA_PC28D-ZEINH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC28D 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_PC28D 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_PC28D INTO WA_PC28D.


*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_PC28D_STR, 
DATUM TYPE STRING,
BEGUZ TYPE STRING,
ENDUZ TYPE STRING,
ALZNR TYPE STRING,
C1ZNR TYPE STRING,
V0TYP TYPE STRING,
V0ZNR TYPE STRING,
VTKEN TYPE STRING,
LGART TYPE STRING,
KENN1 TYPE STRING,
ZEINH TYPE STRING,
ANZHL TYPE STRING,
BETPE TYPE STRING,
BETRG TYPE STRING,
BETSF TYPE STRING,
BETRAG_ZI TYPE STRING,
BETRAG_LA TYPE STRING,
STFREI_ST TYPE STRING,
STFREI_MX TYPE STRING,
STFREI_LA TYPE STRING,
BETBP TYPE STRING,
SVFREI_ST TYPE STRING,
SVFREI_MX TYPE STRING,
SVFREI_LA TYPE STRING,
SVPFL_LA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC28D_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_PC28D_STR-DATUM sy-vline 
WA_PC28D_STR-BEGUZ sy-vline 
WA_PC28D_STR-ENDUZ sy-vline 
WA_PC28D_STR-ALZNR sy-vline 
WA_PC28D_STR-C1ZNR sy-vline 
WA_PC28D_STR-V0TYP sy-vline 
WA_PC28D_STR-V0ZNR sy-vline 
WA_PC28D_STR-VTKEN sy-vline 
WA_PC28D_STR-LGART sy-vline 
WA_PC28D_STR-KENN1 sy-vline 
WA_PC28D_STR-ZEINH sy-vline 
WA_PC28D_STR-ANZHL sy-vline 
WA_PC28D_STR-BETPE sy-vline 
WA_PC28D_STR-BETRG sy-vline 
WA_PC28D_STR-BETSF sy-vline 
WA_PC28D_STR-BETRAG_ZI sy-vline 
WA_PC28D_STR-BETRAG_LA sy-vline 
WA_PC28D_STR-STFREI_ST sy-vline 
WA_PC28D_STR-STFREI_MX sy-vline 
WA_PC28D_STR-STFREI_LA sy-vline 
WA_PC28D_STR-BETBP sy-vline 
WA_PC28D_STR-SVFREI_ST sy-vline 
WA_PC28D_STR-SVFREI_MX sy-vline 
WA_PC28D_STR-SVFREI_LA sy-vline 
WA_PC28D_STR-SVPFL_LA sy-vline      INTO ld_text SEPARATED BY SPACE.

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