ABAP Select data from SAP table T800 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T800 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 T800. 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 T800 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_T800 TYPE STANDARD TABLE OF T800,
      WA_T800 TYPE T800,
      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: <T800> TYPE T800.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T800.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T800
  INTO TABLE IT_T800.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T800
*  INTO TABLE @DATA(IT_T8002).
*--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_T800 INDEX 1 INTO DATA(WA_T8002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T800 ASSIGNING <T800>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T800>-MANDT = 1.
<T800>-LIB = 1.
<T800>-RNAME = 1.
<T800>-CNAM = 1.
<T800>-CDAT = 1.

ENDLOOP.

LOOP AT IT_T800 INTO WA_T800.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T800-CRTIME, sy-vline,
  WA_T800-UNAM, sy-vline,
  WA_T800-UDAT, sy-vline,
  WA_T800-UPTIME, sy-vline,
  WA_T800-STD_LAYOUT, sy-vline,
  WA_T800-DEFAU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T800 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_T800 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_T800 INTO WA_T800.


*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 ISOLA, internal->external for field MASTERLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_T800-MASTERLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T800-MASTERLANG.
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_T800_STR, 
MANDT TYPE STRING,
LIB TYPE STRING,
RNAME TYPE STRING,
CNAM TYPE STRING,
CDAT TYPE STRING,
CRTIME TYPE STRING,
UNAM TYPE STRING,
UDAT TYPE STRING,
UPTIME TYPE STRING,
STD_LAYOUT TYPE STRING,
DEFAU TYPE STRING,
RELS1 TYPE STRING,
RELS2 TYPE STRING,
AUTHGR TYPE STRING,
PS_PROGRAM TYPE STRING,
PS_COMMAND TYPE STRING,
OUT_FILE TYPE STRING,
ORIGIN TYPE STRING,
CSTAT TYPE STRING,
OUT_DEVI TYPE STRING,
OUT_FORM TYPE STRING,
OUT_TYPE TYPE STRING,
TRFLG TYPE STRING,
TRCOL TYPE STRING,
TRMOD TYPE STRING,
TROPR TYPE STRING,
TRVAL TYPE STRING,
TRSGN TYPE STRING,
TRDET TYPE STRING,
TRFLG2 TYPE STRING,
TRCOL2 TYPE STRING,
TRMOD2 TYPE STRING,
TROPR2 TYPE STRING,
TRVAL2 TYPE STRING,
TRSGN2 TYPE STRING,
TRDET2 TYPE STRING,
DATEE TYPE STRING,
DECIE TYPE STRING,
SIGNE TYPE STRING,
PAGLN TYPE STRING,
PAGWD TYPE STRING,
TOPMG TYPE STRING,
BOTMG TYPE STRING,
RGTMG TYPE STRING,
LFTMG TYPE STRING,
RTITR TYPE STRING,
COLSS TYPE STRING,
COLCF TYPE STRING,
SIGCF TYPE STRING,
ZEROR TYPE STRING,
ULTXT TYPE STRING,
ULTYP TYPE STRING,
FIFRST TYPE STRING,
P2TYPE TYPE STRING,
P3TYPE TYPE STRING,
CLPALT TYPE STRING,
PPATT TYPE STRING,
PREOF TYPE STRING,
GTYPE TYPE STRING,
PARMS TYPE STRING,
R_INVAL_S TYPE STRING,
R_INVAL_QUAN TYPE STRING,
DEC_ZERO TYPE STRING,
COLWD TYPE STRING,
COLWD1 TYPE STRING,
COLWD2 TYPE STRING,
COLWD3 TYPE STRING,
COLWD4 TYPE STRING,
COLWD5 TYPE STRING,
UWIDTH0 TYPE STRING,
UWIDTH1 TYPE STRING,
UWIDTH2 TYPE STRING,
UWIDTH3 TYPE STRING,
UWIDTH4 TYPE STRING,
UWIDTH5 TYPE STRING,
COLSP0 TYPE STRING,
COLSP1 TYPE STRING,
COLSP2 TYPE STRING,
COLSP3 TYPE STRING,
COLSP4 TYPE STRING,
COLSP5 TYPE STRING,
SIGN0 TYPE STRING,
SIGN1 TYPE STRING,
SIGN2 TYPE STRING,
SIGN3 TYPE STRING,
SIGN4 TYPE STRING,
SIGN5 TYPE STRING,
ROUND TYPE STRING,
ROUND1 TYPE STRING,
ROUND2 TYPE STRING,
ROUND3 TYPE STRING,
ROUND4 TYPE STRING,
ROUND5 TYPE STRING,
DECIP TYPE STRING,
DECIP1 TYPE STRING,
DECIP2 TYPE STRING,
DECIP3 TYPE STRING,
DECIP4 TYPE STRING,
DECIP5 TYPE STRING,
COLTP TYPE STRING,
COLTX TYPE STRING,
FRMPR TYPE STRING,
GRMRK TYPE STRING,
ROWTX TYPE STRING,
RTITC TYPE STRING,
ROWTX_LG TYPE STRING,
RTITI TYPE STRING,
RTITW TYPE STRING,
SIGN_FLAG TYPE STRING,
SIGN_COL TYPE STRING,
SUM_FROM TYPE STRING,
SUM_TO TYPE STRING,
TFROW TYPE STRING,
TTEXT TYPE STRING,
TTSUP TYPE STRING,
ZSCOL TYPE STRING,
ZSROW TYPE STRING,
TFCOL TYPE STRING,
ROWTX_GR TYPE STRING,
MULTI_CHAR TYPE STRING,
MASTERLANG TYPE STRING,
OUT_FORM1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T800_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_T800_STR-MANDT sy-vline 
WA_T800_STR-LIB sy-vline 
WA_T800_STR-RNAME sy-vline 
WA_T800_STR-CNAM sy-vline 
WA_T800_STR-CDAT sy-vline 
WA_T800_STR-CRTIME sy-vline 
WA_T800_STR-UNAM sy-vline 
WA_T800_STR-UDAT sy-vline 
WA_T800_STR-UPTIME sy-vline 
WA_T800_STR-STD_LAYOUT sy-vline 
WA_T800_STR-DEFAU sy-vline 
WA_T800_STR-RELS1 sy-vline 
WA_T800_STR-RELS2 sy-vline 
WA_T800_STR-AUTHGR sy-vline 
WA_T800_STR-PS_PROGRAM sy-vline 
WA_T800_STR-PS_COMMAND sy-vline 
WA_T800_STR-OUT_FILE sy-vline 
WA_T800_STR-ORIGIN sy-vline 
WA_T800_STR-CSTAT sy-vline 
WA_T800_STR-OUT_DEVI sy-vline 
WA_T800_STR-OUT_FORM sy-vline 
WA_T800_STR-OUT_TYPE sy-vline 
WA_T800_STR-TRFLG sy-vline 
WA_T800_STR-TRCOL sy-vline 
WA_T800_STR-TRMOD sy-vline 
WA_T800_STR-TROPR sy-vline 
WA_T800_STR-TRVAL sy-vline 
WA_T800_STR-TRSGN sy-vline 
WA_T800_STR-TRDET sy-vline 
WA_T800_STR-TRFLG2 sy-vline 
WA_T800_STR-TRCOL2 sy-vline 
WA_T800_STR-TRMOD2 sy-vline 
WA_T800_STR-TROPR2 sy-vline 
WA_T800_STR-TRVAL2 sy-vline 
WA_T800_STR-TRSGN2 sy-vline 
WA_T800_STR-TRDET2 sy-vline 
WA_T800_STR-DATEE sy-vline 
WA_T800_STR-DECIE sy-vline 
WA_T800_STR-SIGNE sy-vline 
WA_T800_STR-PAGLN sy-vline 
WA_T800_STR-PAGWD sy-vline 
WA_T800_STR-TOPMG sy-vline 
WA_T800_STR-BOTMG sy-vline 
WA_T800_STR-RGTMG sy-vline 
WA_T800_STR-LFTMG sy-vline 
WA_T800_STR-RTITR sy-vline 
WA_T800_STR-COLSS sy-vline 
WA_T800_STR-COLCF sy-vline 
WA_T800_STR-SIGCF sy-vline 
WA_T800_STR-ZEROR sy-vline 
WA_T800_STR-ULTXT sy-vline 
WA_T800_STR-ULTYP sy-vline 
WA_T800_STR-FIFRST sy-vline 
WA_T800_STR-P2TYPE sy-vline 
WA_T800_STR-P3TYPE sy-vline 
WA_T800_STR-CLPALT sy-vline 
WA_T800_STR-PPATT sy-vline 
WA_T800_STR-PREOF sy-vline 
WA_T800_STR-GTYPE sy-vline 
WA_T800_STR-PARMS sy-vline 
WA_T800_STR-R_INVAL_S sy-vline 
WA_T800_STR-R_INVAL_QUAN sy-vline 
WA_T800_STR-DEC_ZERO sy-vline 
WA_T800_STR-COLWD sy-vline 
WA_T800_STR-COLWD1 sy-vline 
WA_T800_STR-COLWD2 sy-vline 
WA_T800_STR-COLWD3 sy-vline 
WA_T800_STR-COLWD4 sy-vline 
WA_T800_STR-COLWD5 sy-vline 
WA_T800_STR-UWIDTH0 sy-vline 
WA_T800_STR-UWIDTH1 sy-vline 
WA_T800_STR-UWIDTH2 sy-vline 
WA_T800_STR-UWIDTH3 sy-vline 
WA_T800_STR-UWIDTH4 sy-vline 
WA_T800_STR-UWIDTH5 sy-vline 
WA_T800_STR-COLSP0 sy-vline 
WA_T800_STR-COLSP1 sy-vline 
WA_T800_STR-COLSP2 sy-vline 
WA_T800_STR-COLSP3 sy-vline 
WA_T800_STR-COLSP4 sy-vline 
WA_T800_STR-COLSP5 sy-vline 
WA_T800_STR-SIGN0 sy-vline 
WA_T800_STR-SIGN1 sy-vline 
WA_T800_STR-SIGN2 sy-vline 
WA_T800_STR-SIGN3 sy-vline 
WA_T800_STR-SIGN4 sy-vline 
WA_T800_STR-SIGN5 sy-vline 
WA_T800_STR-ROUND sy-vline 
WA_T800_STR-ROUND1 sy-vline 
WA_T800_STR-ROUND2 sy-vline 
WA_T800_STR-ROUND3 sy-vline 
WA_T800_STR-ROUND4 sy-vline 
WA_T800_STR-ROUND5 sy-vline 
WA_T800_STR-DECIP sy-vline 
WA_T800_STR-DECIP1 sy-vline 
WA_T800_STR-DECIP2 sy-vline 
WA_T800_STR-DECIP3 sy-vline 
WA_T800_STR-DECIP4 sy-vline 
WA_T800_STR-DECIP5 sy-vline 
WA_T800_STR-COLTP sy-vline 
WA_T800_STR-COLTX sy-vline 
WA_T800_STR-FRMPR sy-vline 
WA_T800_STR-GRMRK sy-vline 
WA_T800_STR-ROWTX sy-vline 
WA_T800_STR-RTITC sy-vline 
WA_T800_STR-ROWTX_LG sy-vline 
WA_T800_STR-RTITI sy-vline 
WA_T800_STR-RTITW sy-vline 
WA_T800_STR-SIGN_FLAG sy-vline 
WA_T800_STR-SIGN_COL sy-vline 
WA_T800_STR-SUM_FROM sy-vline 
WA_T800_STR-SUM_TO sy-vline 
WA_T800_STR-TFROW sy-vline 
WA_T800_STR-TTEXT sy-vline 
WA_T800_STR-TTSUP sy-vline 
WA_T800_STR-ZSCOL sy-vline 
WA_T800_STR-ZSROW sy-vline 
WA_T800_STR-TFCOL sy-vline 
WA_T800_STR-ROWTX_GR sy-vline 
WA_T800_STR-MULTI_CHAR sy-vline 
WA_T800_STR-MASTERLANG sy-vline 
WA_T800_STR-OUT_FORM1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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