ABAP Select data from SAP table PC284 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC284 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 PC284. 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 PC284 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_PC284 TYPE STANDARD TABLE OF PC284,
      WA_PC284 TYPE PC284,
      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: <PC284> TYPE PC284.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC284.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC284
  INTO TABLE IT_PC284.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC284
*  INTO TABLE @DATA(IT_PC2842).
*--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_PC284 INDEX 1 INTO DATA(WA_PC2842).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC284 ASSIGNING <PC284>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC284>-BEGDA = 1.
<PC284>-ENDDA = 1.
<PC284>-BETRG = 1.
<PC284>-WAERS = 1.
<PC284>-ANZHL = 1.

ENDLOOP.

LOOP AT IT_PC284 INTO WA_PC284.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC284-EVCL13, sy-vline,
  WA_PC284-LGART, sy-vline,
  WA_PC284-MONTH, sy-vline,
  WA_PC284-FILLER, sy-vline,
  WA_PC284-WKWDY, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PC284 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_PC284 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_PC284 INTO WA_PC284.


*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_PC284_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
BETRG TYPE STRING,
WAERS TYPE STRING,
ANZHL TYPE STRING,
EVCL13 TYPE STRING,
LGART TYPE STRING,
MONTH TYPE STRING,
FILLER TYPE STRING,
WKWDY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC284_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_PC284_STR-BEGDA sy-vline 
WA_PC284_STR-ENDDA sy-vline 
WA_PC284_STR-BETRG sy-vline 
WA_PC284_STR-WAERS sy-vline 
WA_PC284_STR-ANZHL sy-vline 
WA_PC284_STR-EVCL13 sy-vline 
WA_PC284_STR-LGART sy-vline 
WA_PC284_STR-MONTH sy-vline 
WA_PC284_STR-FILLER sy-vline 
WA_PC284_STR-WKWDY sy-vline      INTO ld_text SEPARATED BY SPACE.

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