ABAP Select data from SAP table T811Z into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T811Z 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 T811Z. 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 T811Z 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_T811Z TYPE STANDARD TABLE OF T811Z,
      WA_T811Z TYPE T811Z,
      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: <T811Z> TYPE T811Z.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T811Z.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T811Z
  INTO TABLE IT_T811Z.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T811Z
*  INTO TABLE @DATA(IT_T811Z2).
*--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_T811Z INDEX 1 INTO DATA(WA_T811Z2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T811Z ASSIGNING <T811Z>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T811Z>-MANDT = 1.
<T811Z>-TAB = 1.
<T811Z>-ALART = 1.
<T811Z>-IPKNZ = 1.
<T811Z>-ID = 1.

ENDLOOP.

LOOP AT IT_T811Z INTO WA_T811Z.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T811Z-SDATE, sy-vline,
  WA_T811Z-STIME, sy-vline,
  WA_T811Z-UNAME, sy-vline,
  WA_T811Z-TEST, sy-vline,
  WA_T811Z-DURATION, sy-vline,
  WA_T811Z-DB_SELECT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T811Z 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_T811Z 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_T811Z INTO WA_T811Z.


*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_T811Z_STR, 
MANDT TYPE STRING,
TAB TYPE STRING,
ALART TYPE STRING,
IPKNZ TYPE STRING,
ID TYPE STRING,
SDATE TYPE STRING,
STIME TYPE STRING,
UNAME TYPE STRING,
TEST TYPE STRING,
DURATION TYPE STRING,
DB_SELECT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T811Z_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_T811Z_STR-MANDT sy-vline 
WA_T811Z_STR-TAB sy-vline 
WA_T811Z_STR-ALART sy-vline 
WA_T811Z_STR-IPKNZ sy-vline 
WA_T811Z_STR-ID sy-vline 
WA_T811Z_STR-SDATE sy-vline 
WA_T811Z_STR-STIME sy-vline 
WA_T811Z_STR-UNAME sy-vline 
WA_T811Z_STR-TEST sy-vline 
WA_T811Z_STR-DURATION sy-vline 
WA_T811Z_STR-DB_SELECT sy-vline      INTO ld_text SEPARATED BY SPACE.

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