ABAP Select data from SAP table P18_DDOSSZ_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P18_DDOSSZ_S 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 P18_DDOSSZ_S. 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 P18_DDOSSZ_S 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_P18_DDOSSZ_S TYPE STANDARD TABLE OF P18_DDOSSZ_S,
      WA_P18_DDOSSZ_S TYPE P18_DDOSSZ_S,
      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: <P18_DDOSSZ_S> TYPE P18_DDOSSZ_S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P18_DDOSSZ_S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P18_DDOSSZ_S
  INTO TABLE IT_P18_DDOSSZ_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P18_DDOSSZ_S
*  INTO TABLE @DATA(IT_P18_DDOSSZ_S2).
*--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_P18_DDOSSZ_S INDEX 1 INTO DATA(WA_P18_DDOSSZ_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P18_DDOSSZ_S ASSIGNING <P18_DDOSSZ_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P18_DDOSSZ_S>-HEAD_DETAIL = 1.
<P18_DDOSSZ_S>-PERNR = 1.
<P18_DDOSSZ_S>-SNAME = 1.
<P18_DDOSSZ_S>-FNAME = 1.
<P18_DDOSSZ_S>-PERID = 1.

ENDLOOP.

LOOP AT IT_P18_DDOSSZ_S INTO WA_P18_DDOSSZ_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P18_DDOSSZ_S-POCVO, sy-vline,
  WA_P18_DDOSSZ_S-PERIO, sy-vline,
  WA_P18_DDOSSZ_S-SALNE, sy-vline,
  WA_P18_DDOSSZ_S-MOSSZ, sy-vline,
  WA_P18_DDOSSZ_S-SALNE_W_O_DPP, sy-vline,
  WA_P18_DDOSSZ_S-GAR_W_O_DPP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P18_DDOSSZ_S 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_P18_DDOSSZ_S 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_P18_DDOSSZ_S INTO WA_P18_DDOSSZ_S.


*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_P18_DDOSSZ_S_STR, 
HEAD_DETAIL TYPE STRING,
PERNR TYPE STRING,
SNAME TYPE STRING,
FNAME TYPE STRING,
PERID TYPE STRING,
POCVO TYPE STRING,
PERIO TYPE STRING,
SALNE TYPE STRING,
MOSSZ TYPE STRING,
SALNE_W_O_DPP TYPE STRING,
GAR_W_O_DPP TYPE STRING,
AMTUC TYPE STRING,
UCRES TYPE STRING,
UCRES_W_O_DPP TYPE STRING,
GARNI_NC TYPE STRING,
ITEM_DETAIL TYPE STRING,
DEDUL TYPE STRING,
DEDUO TYPE STRING,
FOOT_DETAIL TYPE STRING,
MTELN TYPE STRING,
MNAME TYPE STRING,
MIDAY TYPE STRING,
MWHER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P18_DDOSSZ_S_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_P18_DDOSSZ_S_STR-HEAD_DETAIL sy-vline 
WA_P18_DDOSSZ_S_STR-PERNR sy-vline 
WA_P18_DDOSSZ_S_STR-SNAME sy-vline 
WA_P18_DDOSSZ_S_STR-FNAME sy-vline 
WA_P18_DDOSSZ_S_STR-PERID sy-vline 
WA_P18_DDOSSZ_S_STR-POCVO sy-vline 
WA_P18_DDOSSZ_S_STR-PERIO sy-vline 
WA_P18_DDOSSZ_S_STR-SALNE sy-vline 
WA_P18_DDOSSZ_S_STR-MOSSZ sy-vline 
WA_P18_DDOSSZ_S_STR-SALNE_W_O_DPP sy-vline 
WA_P18_DDOSSZ_S_STR-GAR_W_O_DPP sy-vline 
WA_P18_DDOSSZ_S_STR-AMTUC sy-vline 
WA_P18_DDOSSZ_S_STR-UCRES sy-vline 
WA_P18_DDOSSZ_S_STR-UCRES_W_O_DPP sy-vline 
WA_P18_DDOSSZ_S_STR-GARNI_NC sy-vline 
WA_P18_DDOSSZ_S_STR-ITEM_DETAIL sy-vline 
WA_P18_DDOSSZ_S_STR-DEDUL sy-vline 
WA_P18_DDOSSZ_S_STR-DEDUO sy-vline 
WA_P18_DDOSSZ_S_STR-FOOT_DETAIL sy-vline 
WA_P18_DDOSSZ_S_STR-MTELN sy-vline 
WA_P18_DDOSSZ_S_STR-MNAME sy-vline 
WA_P18_DDOSSZ_S_STR-MIDAY sy-vline 
WA_P18_DDOSSZ_S_STR-MWHER sy-vline      INTO ld_text SEPARATED BY SPACE.

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