ABAP Select data from SAP table SIT_DEF_T into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SIT_DEF_T
*  INTO TABLE @DATA(IT_SIT_DEF_T2).
*--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_SIT_DEF_T INDEX 1 INTO DATA(WA_SIT_DEF_T2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SIT_DEF_T>-CLIENT = 1.
<SIT_DEF_T>-SITNDEFINITIONID = 1.
<SIT_DEF_T>-SITNDEFLONGTEXTVERSION = 1.
<SIT_DEF_T>-LANGUAGE = 1.
<SIT_DEF_T>-SITNDEFNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SIT_DEF_T-SITNDEFSHORTTEXT, sy-vline,
  WA_SIT_DEF_T-SITNDEFLONGTEXT, sy-vline,
  WA_SIT_DEF_T-SITNCNDNDESCRIPTION, sy-vline,
  WA_SIT_DEF_T-SITNDEFDETAILSLINKTEXT, sy-vline,
  WA_SIT_DEF_T-SITNDEFDETAILSLINK, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_SIT_DEF_T 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_SIT_DEF_T 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_SIT_DEF_T INTO WA_SIT_DEF_T.


*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 LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_SIT_DEF_T-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SIT_DEF_T-LANGUAGE.
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_SIT_DEF_T_STR, 
CLIENT TYPE STRING,
SITNDEFINITIONID TYPE STRING,
SITNDEFLONGTEXTVERSION TYPE STRING,
LANGUAGE TYPE STRING,
SITNDEFNAME TYPE STRING,
SITNDEFSHORTTEXT TYPE STRING,
SITNDEFLONGTEXT TYPE STRING,
SITNCNDNDESCRIPTION TYPE STRING,
SITNDEFDETAILSLINKTEXT TYPE STRING,
SITNDEFDETAILSLINK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SIT_DEF_T_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_SIT_DEF_T_STR-CLIENT sy-vline 
WA_SIT_DEF_T_STR-SITNDEFINITIONID sy-vline 
WA_SIT_DEF_T_STR-SITNDEFLONGTEXTVERSION sy-vline 
WA_SIT_DEF_T_STR-LANGUAGE sy-vline 
WA_SIT_DEF_T_STR-SITNDEFNAME sy-vline 
WA_SIT_DEF_T_STR-SITNDEFSHORTTEXT sy-vline 
WA_SIT_DEF_T_STR-SITNDEFLONGTEXT sy-vline 
WA_SIT_DEF_T_STR-SITNCNDNDESCRIPTION sy-vline 
WA_SIT_DEF_T_STR-SITNDEFDETAILSLINKTEXT sy-vline 
WA_SIT_DEF_T_STR-SITNDEFDETAILSLINK sy-vline      INTO ld_text SEPARATED BY SPACE.

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