ABAP Select data from SAP table P20P_SST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P20P_SST 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 P20P_SST. 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 P20P_SST 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_P20P_SST TYPE STANDARD TABLE OF P20P_SST,
      WA_P20P_SST TYPE P20P_SST,
      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: <P20P_SST> TYPE P20P_SST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P20P_SST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P20P_SST
  INTO TABLE IT_P20P_SST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P20P_SST
*  INTO TABLE @DATA(IT_P20P_SST2).
*--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_P20P_SST INDEX 1 INTO DATA(WA_P20P_SST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P20P_SST ASSIGNING <P20P_SST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P20P_SST>-ETATK = 1.
<P20P_SST>-TJENK = 1.
<P20P_SST>-FDNUM = 1.
<P20P_SST>-JOBNR = 1.
<P20P_SST>-OPRKO = 1.

ENDLOOP.

LOOP AT IT_P20P_SST INTO WA_P20P_SST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P20P_SST-KORTA, sy-vline,
  WA_P20P_SST-PNAVN, sy-vline,
  WA_P20P_SST-DUMY1, sy-vline,
  WA_P20P_SST-STILLK, sy-vline,
  WA_P20P_SST-LONNRN, sy-vline,
  WA_P20P_SST-LONNRA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P20P_SST 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_P20P_SST 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_P20P_SST INTO WA_P20P_SST.


*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_P20P_SST_STR, 
ETATK TYPE STRING,
TJENK TYPE STRING,
FDNUM TYPE STRING,
JOBNR TYPE STRING,
OPRKO TYPE STRING,
KORTA TYPE STRING,
PNAVN TYPE STRING,
DUMY1 TYPE STRING,
STILLK TYPE STRING,
LONNRN TYPE STRING,
LONNRA TYPE STRING,
LONNTR TYPE STRING,
DELPRO TYPE STRING,
TJANSM TYPE STRING,
TJANSY TYPE STRING,
TFORH1 TYPE STRING,
TFORH2 TYPE STRING,
TFORH3 TYPE STRING,
ARBSTK TYPE STRING,
UTDANK TYPE STRING,
FTILLB TYPE STRING,
AFTILL TYPE STRING,
VARTIL TYPE STRING,
VAROVT TYPE STRING,
BUDKAP TYPE STRING,
BUDPOS TYPE STRING,
DUMY2 TYPE STRING,
OVTTIM TYPE STRING,
ANTTJM TYPE STRING,
UTDSSB TYPE STRING,
ANSVIR TYPE STRING,
ANSSTI TYPE STRING,
ORGBED TYPE STRING,
ORGJUR TYPE STRING,
ALONN TYPE STRING,
FTILL TYPE STRING,
VRTILL TYPE STRING,
BONPAY TYPE STRING,
LYRBON TYPE STRING,
OVTPAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P20P_SST_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_P20P_SST_STR-ETATK sy-vline 
WA_P20P_SST_STR-TJENK sy-vline 
WA_P20P_SST_STR-FDNUM sy-vline 
WA_P20P_SST_STR-JOBNR sy-vline 
WA_P20P_SST_STR-OPRKO sy-vline 
WA_P20P_SST_STR-KORTA sy-vline 
WA_P20P_SST_STR-PNAVN sy-vline 
WA_P20P_SST_STR-DUMY1 sy-vline 
WA_P20P_SST_STR-STILLK sy-vline 
WA_P20P_SST_STR-LONNRN sy-vline 
WA_P20P_SST_STR-LONNRA sy-vline 
WA_P20P_SST_STR-LONNTR sy-vline 
WA_P20P_SST_STR-DELPRO sy-vline 
WA_P20P_SST_STR-TJANSM sy-vline 
WA_P20P_SST_STR-TJANSY sy-vline 
WA_P20P_SST_STR-TFORH1 sy-vline 
WA_P20P_SST_STR-TFORH2 sy-vline 
WA_P20P_SST_STR-TFORH3 sy-vline 
WA_P20P_SST_STR-ARBSTK sy-vline 
WA_P20P_SST_STR-UTDANK sy-vline 
WA_P20P_SST_STR-FTILLB sy-vline 
WA_P20P_SST_STR-AFTILL sy-vline 
WA_P20P_SST_STR-VARTIL sy-vline 
WA_P20P_SST_STR-VAROVT sy-vline 
WA_P20P_SST_STR-BUDKAP sy-vline 
WA_P20P_SST_STR-BUDPOS sy-vline 
WA_P20P_SST_STR-DUMY2 sy-vline 
WA_P20P_SST_STR-OVTTIM sy-vline 
WA_P20P_SST_STR-ANTTJM sy-vline 
WA_P20P_SST_STR-UTDSSB sy-vline 
WA_P20P_SST_STR-ANSVIR sy-vline 
WA_P20P_SST_STR-ANSSTI sy-vline 
WA_P20P_SST_STR-ORGBED sy-vline 
WA_P20P_SST_STR-ORGJUR sy-vline 
WA_P20P_SST_STR-ALONN sy-vline 
WA_P20P_SST_STR-FTILL sy-vline 
WA_P20P_SST_STR-VRTILL sy-vline 
WA_P20P_SST_STR-BONPAY sy-vline 
WA_P20P_SST_STR-LYRBON sy-vline 
WA_P20P_SST_STR-OVTPAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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