ABAP Select data from SAP table PC258 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC258 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 PC258. 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 PC258 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_PC258 TYPE STANDARD TABLE OF PC258,
      WA_PC258 TYPE PC258,
      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: <PC258> TYPE PC258.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC258.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC258
  INTO TABLE IT_PC258.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC258
*  INTO TABLE @DATA(IT_PC2582).
*--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_PC258 INDEX 1 INTO DATA(WA_PC2582).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC258 ASSIGNING <PC258>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC258>-CNTR2 = 1.
<PC258>-BEGDA = 1.
<PC258>-ENDDA = 1.
<PC258>-TXTYP = 1.
<PC258>-TNOEE = 1.

ENDLOOP.

LOOP AT IT_PC258 INTO WA_PC258.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC258-TNOER, sy-vline,
  WA_PC258-TXOFF, sy-vline,
  WA_PC258-WIFWS, sy-vline,
  WA_PC258-NUMCH, sy-vline,
  WA_PC258-MARST, sy-vline,
  WA_PC258-TXEMR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC258 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_PC258 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_PC258 INTO WA_PC258.


*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_PC258_STR, 
CNTR2 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
TXTYP TYPE STRING,
TNOEE TYPE STRING,
TNOER TYPE STRING,
TXOFF TYPE STRING,
WIFWS TYPE STRING,
NUMCH TYPE STRING,
MARST TYPE STRING,
TXEMR TYPE STRING,
TAXOP TYPE STRING,
TCTGF TYPE STRING,
APTYP TYPE STRING,
EMFSL TYPE STRING,
DISSF TYPE STRING,
DISSP TYPE STRING,
EECAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC258_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_PC258_STR-CNTR2 sy-vline 
WA_PC258_STR-BEGDA sy-vline 
WA_PC258_STR-ENDDA sy-vline 
WA_PC258_STR-TXTYP sy-vline 
WA_PC258_STR-TNOEE sy-vline 
WA_PC258_STR-TNOER sy-vline 
WA_PC258_STR-TXOFF sy-vline 
WA_PC258_STR-WIFWS sy-vline 
WA_PC258_STR-NUMCH sy-vline 
WA_PC258_STR-MARST sy-vline 
WA_PC258_STR-TXEMR sy-vline 
WA_PC258_STR-TAXOP sy-vline 
WA_PC258_STR-TCTGF sy-vline 
WA_PC258_STR-APTYP sy-vline 
WA_PC258_STR-EMFSL sy-vline 
WA_PC258_STR-DISSF sy-vline 
WA_PC258_STR-DISSP sy-vline 
WA_PC258_STR-EECAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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