ABAP Select data from SAP table LRITK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LRITK
*  INTO TABLE @DATA(IT_LRITK2).
*--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_LRITK INDEX 1 INTO DATA(WA_LRITK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LRITK>-MANDT = 1.
<LRITK>-LOCAT = 1.
<LRITK>-RQITM = 1.
<LRITK>-TASKI = 1.
<LRITK>-FNDST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LRITK-WCFLG, sy-vline,
  WA_LRITK-NEWHU, sy-vline,
  WA_LRITK-NEWTY, sy-vline,
  WA_LRITK-TKBDL, sy-vline,
  WA_LRITK-TKCRT, sy-vline,
  WA_LRITK-RZONEDST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LRITK 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_LRITK 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_LRITK INTO WA_LRITK.


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

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

*Conversion exit TSTRM, internal->external for field TKCRT
CALL FUNCTION 'CONVERSION_EXIT_TSTRM_OUTPUT'
  EXPORTING
    input =                      WA_LRITK-TKCRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LRITK-TKCRT.
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_LRITK_STR, 
MANDT TYPE STRING,
LOCAT TYPE STRING,
RQITM TYPE STRING,
TASKI TYPE STRING,
FNDST TYPE STRING,
WCFLG TYPE STRING,
NEWHU TYPE STRING,
NEWTY TYPE STRING,
TKBDL TYPE STRING,
TKCRT TYPE STRING,
RZONEDST TYPE STRING,
BINCXDST TYPE STRING,
BINCYDST TYPE STRING,
BINCZDST TYPE STRING,
RNODEDST TYPE STRING,
INRSN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LRITK_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_LRITK_STR-MANDT sy-vline 
WA_LRITK_STR-LOCAT sy-vline 
WA_LRITK_STR-RQITM sy-vline 
WA_LRITK_STR-TASKI sy-vline 
WA_LRITK_STR-FNDST sy-vline 
WA_LRITK_STR-WCFLG sy-vline 
WA_LRITK_STR-NEWHU sy-vline 
WA_LRITK_STR-NEWTY sy-vline 
WA_LRITK_STR-TKBDL sy-vline 
WA_LRITK_STR-TKCRT sy-vline 
WA_LRITK_STR-RZONEDST sy-vline 
WA_LRITK_STR-BINCXDST sy-vline 
WA_LRITK_STR-BINCYDST sy-vline 
WA_LRITK_STR-BINCZDST sy-vline 
WA_LRITK_STR-RNODEDST sy-vline 
WA_LRITK_STR-INRSN sy-vline      INTO ld_text SEPARATED BY SPACE.

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