ABAP Select data from SAP table LEINT_TVTY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LEINT_TVTY
*  INTO TABLE @DATA(IT_LEINT_TVTY2).
*--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_LEINT_TVTY INDEX 1 INTO DATA(WA_LEINT_TVTY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LEINT_TVTY>-MANDT = 1.
<LEINT_TVTY>-TRATY = 1.
<LEINT_TVTY>-KAPPL = 1.
<LEINT_TVTY>-KALSM = 1.
<LEINT_TVTY>-KSCHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LEINT_TVTY-SORTF, sy-vline,
  WA_LEINT_TVTY-WERFD, sy-vline,
  WA_LEINT_TVTY-VELTP, sy-vline,
  WA_LEINT_TVTY-GRUVS, sy-vline,
  WA_LEINT_TVTY-NRVERG, sy-vline,
  WA_LEINT_TVTY-SSCC18, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LEINT_TVTY 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_LEINT_TVTY 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_LEINT_TVTY INTO WA_LEINT_TVTY.


*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_LEINT_TVTY_STR, 
MANDT TYPE STRING,
TRATY TYPE STRING,
KAPPL TYPE STRING,
KALSM TYPE STRING,
KSCHL TYPE STRING,
SORTF TYPE STRING,
WERFD TYPE STRING,
VELTP TYPE STRING,
GRUVS TYPE STRING,
NRVERG TYPE STRING,
SSCC18 TYPE STRING,
INT_NKR TYPE STRING,
EXT_NKR TYPE STRING,
TARAVAR TYPE STRING,
STSMA TYPE STRING,
KZPGN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LEINT_TVTY_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_LEINT_TVTY_STR-MANDT sy-vline 
WA_LEINT_TVTY_STR-TRATY sy-vline 
WA_LEINT_TVTY_STR-KAPPL sy-vline 
WA_LEINT_TVTY_STR-KALSM sy-vline 
WA_LEINT_TVTY_STR-KSCHL sy-vline 
WA_LEINT_TVTY_STR-SORTF sy-vline 
WA_LEINT_TVTY_STR-WERFD sy-vline 
WA_LEINT_TVTY_STR-VELTP sy-vline 
WA_LEINT_TVTY_STR-GRUVS sy-vline 
WA_LEINT_TVTY_STR-NRVERG sy-vline 
WA_LEINT_TVTY_STR-SSCC18 sy-vline 
WA_LEINT_TVTY_STR-INT_NKR sy-vline 
WA_LEINT_TVTY_STR-EXT_NKR sy-vline 
WA_LEINT_TVTY_STR-TARAVAR sy-vline 
WA_LEINT_TVTY_STR-STSMA sy-vline 
WA_LEINT_TVTY_STR-KZPGN sy-vline      INTO ld_text SEPARATED BY SPACE.

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