ABAP Select data from SAP table T811IA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T811IA 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 T811IA. 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 T811IA 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_T811IA TYPE STANDARD TABLE OF T811IA,
      WA_T811IA TYPE T811IA,
      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: <T811IA> TYPE T811IA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T811IA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T811IA
  INTO TABLE IT_T811IA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T811IA
*  INTO TABLE @DATA(IT_T811IA2).
*--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_T811IA INDEX 1 INTO DATA(WA_T811IA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T811IA ASSIGNING <T811IA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T811IA>-MANDT = 1.
<T811IA>-TAB = 1.
<T811IA>-CYCLE = 1.
<T811IA>-ALART = 1.
<T811IA>-IPKNZ = 1.

ENDLOOP.

LOOP AT IT_T811IA INTO WA_T811IA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T811IA-FIELD, sy-vline,
  WA_T811IA-CACT, sy-vline,
  WA_T811IA-SCACT, sy-vline,
  WA_T811IA-SACT, sy-vline,
  WA_T811IA-RACT, sy-vline,
  WA_T811IA-RCACT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T811IA 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_T811IA 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_T811IA INTO WA_T811IA.


*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_T811IA_STR, 
MANDT TYPE STRING,
TAB TYPE STRING,
CYCLE TYPE STRING,
ALART TYPE STRING,
IPKNZ TYPE STRING,
FIELD TYPE STRING,
CACT TYPE STRING,
SCACT TYPE STRING,
SACT TYPE STRING,
RACT TYPE STRING,
RCACT TYPE STRING,
CSET TYPE STRING,
SCSET TYPE STRING,
SSET TYPE STRING,
RSET TYPE STRING,
RCSET TYPE STRING,
CSING TYPE STRING,
SCSING TYPE STRING,
SSING TYPE STRING,
RSING TYPE STRING,
RCSING TYPE STRING,
CINT TYPE STRING,
SCINT TYPE STRING,
SINT TYPE STRING,
RINT TYPE STRING,
RCINT TYPE STRING,
CSCACT TYPE STRING,
CSCSET TYPE STRING,
CSCSING TYPE STRING,
CSCINT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T811IA_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_T811IA_STR-MANDT sy-vline 
WA_T811IA_STR-TAB sy-vline 
WA_T811IA_STR-CYCLE sy-vline 
WA_T811IA_STR-ALART sy-vline 
WA_T811IA_STR-IPKNZ sy-vline 
WA_T811IA_STR-FIELD sy-vline 
WA_T811IA_STR-CACT sy-vline 
WA_T811IA_STR-SCACT sy-vline 
WA_T811IA_STR-SACT sy-vline 
WA_T811IA_STR-RACT sy-vline 
WA_T811IA_STR-RCACT sy-vline 
WA_T811IA_STR-CSET sy-vline 
WA_T811IA_STR-SCSET sy-vline 
WA_T811IA_STR-SSET sy-vline 
WA_T811IA_STR-RSET sy-vline 
WA_T811IA_STR-RCSET sy-vline 
WA_T811IA_STR-CSING sy-vline 
WA_T811IA_STR-SCSING sy-vline 
WA_T811IA_STR-SSING sy-vline 
WA_T811IA_STR-RSING sy-vline 
WA_T811IA_STR-RCSING sy-vline 
WA_T811IA_STR-CINT sy-vline 
WA_T811IA_STR-SCINT sy-vline 
WA_T811IA_STR-SINT sy-vline 
WA_T811IA_STR-RINT sy-vline 
WA_T811IA_STR-RCINT sy-vline 
WA_T811IA_STR-CSCACT sy-vline 
WA_T811IA_STR-CSCSET sy-vline 
WA_T811IA_STR-CSCSING sy-vline 
WA_T811IA_STR-CSCINT sy-vline      INTO ld_text SEPARATED BY SPACE.

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