ABAP Select data from SAP table T811DA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T811DA 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 T811DA. 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 T811DA 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_T811DA TYPE STANDARD TABLE OF T811DA,
      WA_T811DA TYPE T811DA,
      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: <T811DA> TYPE T811DA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T811DA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T811DA
  INTO TABLE IT_T811DA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T811DA
*  INTO TABLE @DATA(IT_T811DA2).
*--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_T811DA INDEX 1 INTO DATA(WA_T811DA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T811DA ASSIGNING <T811DA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T811DA>-MANDT = 1.
<T811DA>-TAB = 1.
<T811DA>-CYCLE = 1.
<T811DA>-SDATE = 1.
<T811DA>-GJAHR = 1.

ENDLOOP.

LOOP AT IT_T811DA INTO WA_T811DA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T811DA-PERIO, sy-vline,
  WA_T811DA-DPOS, sy-vline,
  WA_T811DA-DOCNR, sy-vline,
  WA_T811DA-ADATE, sy-vline,
  WA_T811DA-RDOC, sy-vline,
  WA_T811DA-RDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T811DA 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_T811DA 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_T811DA INTO WA_T811DA.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_T811DA-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T811DA-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T811DA-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T811DA-DOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T811DA-RDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T811DA-RDOC.
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_T811DA_STR, 
MANDT TYPE STRING,
TAB TYPE STRING,
CYCLE TYPE STRING,
SDATE TYPE STRING,
GJAHR TYPE STRING,
PERIO TYPE STRING,
DPOS TYPE STRING,
DOCNR TYPE STRING,
ADATE TYPE STRING,
RDOC TYPE STRING,
RDATE TYPE STRING,
REVERSED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T811DA_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_T811DA_STR-MANDT sy-vline 
WA_T811DA_STR-TAB sy-vline 
WA_T811DA_STR-CYCLE sy-vline 
WA_T811DA_STR-SDATE sy-vline 
WA_T811DA_STR-GJAHR sy-vline 
WA_T811DA_STR-PERIO sy-vline 
WA_T811DA_STR-DPOS sy-vline 
WA_T811DA_STR-DOCNR sy-vline 
WA_T811DA_STR-ADATE sy-vline 
WA_T811DA_STR-RDOC sy-vline 
WA_T811DA_STR-RDATE sy-vline 
WA_T811DA_STR-REVERSED sy-vline      INTO ld_text SEPARATED BY SPACE.

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