ABAP Select data from SAP table T801U into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T801U 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 T801U. 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 T801U 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_T801U TYPE STANDARD TABLE OF T801U,
      WA_T801U TYPE T801U,
      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: <T801U> TYPE T801U.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T801U.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T801U
  INTO TABLE IT_T801U.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T801U
*  INTO TABLE @DATA(IT_T801U2).
*--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_T801U INDEX 1 INTO DATA(WA_T801U2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T801U ASSIGNING <T801U>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T801U>-MANDT = 1.
<T801U>-SNAME = 1.
<T801U>-CNAM = 1.
<T801U>-CDAT = 1.
<T801U>-CRTIME = 1.

ENDLOOP.

LOOP AT IT_T801U INTO WA_T801U.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T801U-UNAM, sy-vline,
  WA_T801U-UDAT, sy-vline,
  WA_T801U-UPTIME, sy-vline,
  WA_T801U-PPATT, sy-vline,
  WA_T801U-TFROW, sy-vline,
  WA_T801U-TFCOL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T801U 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_T801U 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_T801U INTO WA_T801U.


*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_T801U_STR, 
MANDT TYPE STRING,
SNAME TYPE STRING,
CNAM TYPE STRING,
CDAT TYPE STRING,
CRTIME TYPE STRING,
UNAM TYPE STRING,
UDAT TYPE STRING,
UPTIME TYPE STRING,
PPATT TYPE STRING,
TFROW TYPE STRING,
TFCOL TYPE STRING,
FRMPR TYPE STRING,
ZSROW TYPE STRING,
ZSCOL 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,
GTYPE TYPE STRING,
PARMS TYPE STRING,
TTSUP TYPE STRING,
TTEXT TYPE STRING,
SUM_FROM TYPE STRING,
SUM_TO TYPE STRING,
SIGN_COL TYPE STRING,
AUTHGR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T801U_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_T801U_STR-MANDT sy-vline 
WA_T801U_STR-SNAME sy-vline 
WA_T801U_STR-CNAM sy-vline 
WA_T801U_STR-CDAT sy-vline 
WA_T801U_STR-CRTIME sy-vline 
WA_T801U_STR-UNAM sy-vline 
WA_T801U_STR-UDAT sy-vline 
WA_T801U_STR-UPTIME sy-vline 
WA_T801U_STR-PPATT sy-vline 
WA_T801U_STR-TFROW sy-vline 
WA_T801U_STR-TFCOL sy-vline 
WA_T801U_STR-FRMPR sy-vline 
WA_T801U_STR-ZSROW sy-vline 
WA_T801U_STR-ZSCOL sy-vline 
WA_T801U_STR-ROUND sy-vline 
WA_T801U_STR-ROUND1 sy-vline 
WA_T801U_STR-ROUND2 sy-vline 
WA_T801U_STR-ROUND3 sy-vline 
WA_T801U_STR-ROUND4 sy-vline 
WA_T801U_STR-ROUND5 sy-vline 
WA_T801U_STR-DECIP sy-vline 
WA_T801U_STR-DECIP1 sy-vline 
WA_T801U_STR-DECIP2 sy-vline 
WA_T801U_STR-DECIP3 sy-vline 
WA_T801U_STR-DECIP4 sy-vline 
WA_T801U_STR-DECIP5 sy-vline 
WA_T801U_STR-GTYPE sy-vline 
WA_T801U_STR-PARMS sy-vline 
WA_T801U_STR-TTSUP sy-vline 
WA_T801U_STR-TTEXT sy-vline 
WA_T801U_STR-SUM_FROM sy-vline 
WA_T801U_STR-SUM_TO sy-vline 
WA_T801U_STR-SIGN_COL sy-vline 
WA_T801U_STR-AUTHGR sy-vline      INTO ld_text SEPARATED BY SPACE.

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