ABAP Select data from SAP table PC258A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC258A 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 PC258A. 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 PC258A 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_PC258A TYPE STANDARD TABLE OF PC258A,
      WA_PC258A TYPE PC258A,
      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: <PC258A> TYPE PC258A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC258A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC258A
  INTO TABLE IT_PC258A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC258A
*  INTO TABLE @DATA(IT_PC258A2).
*--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_PC258A INDEX 1 INTO DATA(WA_PC258A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC258A ASSIGNING <PC258A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC258A>-EXCUR = 1.
<PC258A>-MEDPR = 1.
<PC258A>-EQDIS = 1.
<PC258A>-SFDIS = 1.
<PC258A>-SPDIS = 1.

ENDLOOP.

LOOP AT IT_PC258A INTO WA_PC258A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC258A-EDFEE, sy-vline,
  WA_PC258A-MEDSD, sy-vline,
  WA_PC258A-MEDEX, sy-vline,
  WA_PC258A-BKALW, sy-vline,
  WA_PC258A-PCALW, sy-vline,
  WA_PC258A-DSSPN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC258A 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_PC258A 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_PC258A INTO WA_PC258A.


*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_PC258A_STR, 
EXCUR TYPE STRING,
MEDPR TYPE STRING,
EQDIS TYPE STRING,
SFDIS TYPE STRING,
SPDIS TYPE STRING,
EDFEE TYPE STRING,
MEDSD TYPE STRING,
MEDEX TYPE STRING,
BKALW TYPE STRING,
PCALW TYPE STRING,
DSSPN TYPE STRING,
SPCTR TYPE STRING,
ALIMY TYPE STRING,
LFINS TYPE STRING,
EDMIN TYPE STRING,
ZKDED TYPE STRING,
TEMPE TYPE STRING,
GRREN TYPE STRING,
TOTPF TYPE STRING,
PRSTD TYPE STRING,
SUBTY TYPE STRING,
RESIS TYPE STRING,
ASPRE TYPE STRING,
HSLIN TYPE STRING,
BRBSF TYPE STRING,
SOCPY TYPE STRING,
PARCA TYPE STRING,
PARCM TYPE STRING,
LIFES TYPE STRING,
BREAS TYPE STRING,
CHIDC TYPE STRING,
DOMTU TYPE STRING,
HPNBT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC258A_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_PC258A_STR-EXCUR sy-vline 
WA_PC258A_STR-MEDPR sy-vline 
WA_PC258A_STR-EQDIS sy-vline 
WA_PC258A_STR-SFDIS sy-vline 
WA_PC258A_STR-SPDIS sy-vline 
WA_PC258A_STR-EDFEE sy-vline 
WA_PC258A_STR-MEDSD sy-vline 
WA_PC258A_STR-MEDEX sy-vline 
WA_PC258A_STR-BKALW sy-vline 
WA_PC258A_STR-PCALW sy-vline 
WA_PC258A_STR-DSSPN sy-vline 
WA_PC258A_STR-SPCTR sy-vline 
WA_PC258A_STR-ALIMY sy-vline 
WA_PC258A_STR-LFINS sy-vline 
WA_PC258A_STR-EDMIN sy-vline 
WA_PC258A_STR-ZKDED sy-vline 
WA_PC258A_STR-TEMPE sy-vline 
WA_PC258A_STR-GRREN sy-vline 
WA_PC258A_STR-TOTPF sy-vline 
WA_PC258A_STR-PRSTD sy-vline 
WA_PC258A_STR-SUBTY sy-vline 
WA_PC258A_STR-RESIS sy-vline 
WA_PC258A_STR-ASPRE sy-vline 
WA_PC258A_STR-HSLIN sy-vline 
WA_PC258A_STR-BRBSF sy-vline 
WA_PC258A_STR-SOCPY sy-vline 
WA_PC258A_STR-PARCA sy-vline 
WA_PC258A_STR-PARCM sy-vline 
WA_PC258A_STR-LIFES sy-vline 
WA_PC258A_STR-BREAS sy-vline 
WA_PC258A_STR-CHIDC sy-vline 
WA_PC258A_STR-DOMTU sy-vline 
WA_PC258A_STR-HPNBT sy-vline      INTO ld_text SEPARATED BY SPACE.

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