ABAP Select data from SAP table T800S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T800S 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 T800S. 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 T800S 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_T800S TYPE STANDARD TABLE OF T800S,
      WA_T800S TYPE T800S,
      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: <T800S> TYPE T800S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T800S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T800S
  INTO TABLE IT_T800S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T800S
*  INTO TABLE @DATA(IT_T800S2).
*--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_T800S INDEX 1 INTO DATA(WA_T800S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T800S ASSIGNING <T800S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T800S>-MANDT = 1.
<T800S>-TAB = 1.
<T800S>-SETNR = 1.
<T800S>-TYPE = 1.
<T800S>-UNIQ = 1.

ENDLOOP.

LOOP AT IT_T800S INTO WA_T800S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T800S-CRUSER, sy-vline,
  WA_T800S-CRDATE, sy-vline,
  WA_T800S-UPDUSER, sy-vline,
  WA_T800S-UPDDATE, sy-vline,
  WA_T800S-FELD, sy-vline,
  WA_T800S-RNUMFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T800S 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_T800S 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_T800S INTO WA_T800S.


*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.

*Conversion exit CUNIT, internal->external for field RUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_T800S-RUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T800S-RUNIT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_T800S_STR, 
MANDT TYPE STRING,
TAB TYPE STRING,
SETNR TYPE STRING,
TYPE TYPE STRING,
UNIQ TYPE STRING,
CRUSER TYPE STRING,
CRDATE TYPE STRING,
UPDUSER TYPE STRING,
UPDDATE TYPE STRING,
FELD TYPE STRING,
RNUMFLAG TYPE STRING,
UPDFLAG TYPE STRING,
ISUNIQUE TYPE STRING,
RVALUE TYPE STRING,
RTCUR TYPE STRING,
RUNIT TYPE STRING,
VALMIN TYPE STRING,
VALMAX TYPE STRING,
VERSION TYPE STRING,
NAME TYPE STRING,
LVL TYPE STRING,
TEXTNR TYPE STRING,
GFLAG TYPE STRING,
GDATE TYPE STRING,
GTIME TYPE STRING,
AUTHGR TYPE STRING,
SETFILL TYPE STRING,
SEARCHFLD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T800S_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_T800S_STR-MANDT sy-vline 
WA_T800S_STR-TAB sy-vline 
WA_T800S_STR-SETNR sy-vline 
WA_T800S_STR-TYPE sy-vline 
WA_T800S_STR-UNIQ sy-vline 
WA_T800S_STR-CRUSER sy-vline 
WA_T800S_STR-CRDATE sy-vline 
WA_T800S_STR-UPDUSER sy-vline 
WA_T800S_STR-UPDDATE sy-vline 
WA_T800S_STR-FELD sy-vline 
WA_T800S_STR-RNUMFLAG sy-vline 
WA_T800S_STR-UPDFLAG sy-vline 
WA_T800S_STR-ISUNIQUE sy-vline 
WA_T800S_STR-RVALUE sy-vline 
WA_T800S_STR-RTCUR sy-vline 
WA_T800S_STR-RUNIT sy-vline 
WA_T800S_STR-VALMIN sy-vline 
WA_T800S_STR-VALMAX sy-vline 
WA_T800S_STR-VERSION sy-vline 
WA_T800S_STR-NAME sy-vline 
WA_T800S_STR-LVL sy-vline 
WA_T800S_STR-TEXTNR sy-vline 
WA_T800S_STR-GFLAG sy-vline 
WA_T800S_STR-GDATE sy-vline 
WA_T800S_STR-GTIME sy-vline 
WA_T800S_STR-AUTHGR sy-vline 
WA_T800S_STR-SETFILL sy-vline 
WA_T800S_STR-SEARCHFLD sy-vline      INTO ld_text SEPARATED BY SPACE.

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