ABAP Select data from SAP table L03B_TRITE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP L03B_TRITE 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 L03B_TRITE. 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 L03B_TRITE 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_L03B_TRITE TYPE STANDARD TABLE OF L03B_TRITE,
      WA_L03B_TRITE TYPE L03B_TRITE,
      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: <L03B_TRITE> TYPE L03B_TRITE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_L03B_TRITE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM L03B_TRITE
  INTO TABLE IT_L03B_TRITE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM L03B_TRITE
*  INTO TABLE @DATA(IT_L03B_TRITE2).
*--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_L03B_TRITE INDEX 1 INTO DATA(WA_L03B_TRITE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_L03B_TRITE ASSIGNING <L03B_TRITE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<L03B_TRITE>-TBPOS = 1.
<L03B_TRITE>-ANFME = 1.
<L03B_TRITE>-ALTME = 1.
<L03B_TRITE>-CHARG = 1.
<L03B_TRITE>-NLTYP = 1.

ENDLOOP.

LOOP AT IT_L03B_TRITE INTO WA_L03B_TRITE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_L03B_TRITE-NLBER, sy-vline,
  WA_L03B_TRITE-NLPLA, sy-vline,
  WA_L03B_TRITE-NPPOS, sy-vline,
  WA_L03B_TRITE-NLENR, sy-vline,
  WA_L03B_TRITE-LETYP, sy-vline,
  WA_L03B_TRITE-VLTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_L03B_TRITE 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_L03B_TRITE 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_L03B_TRITE INTO WA_L03B_TRITE.


*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 CUNIT, internal->external for field ALTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L03B_TRITE-ALTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L03B_TRITE-ALTME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LENUM, internal->external for field NLENR
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_L03B_TRITE-NLENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L03B_TRITE-NLENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LENUM, internal->external for field VLENR
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_L03B_TRITE-VLENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L03B_TRITE-VLENR.
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_L03B_TRITE_STR, 
TBPOS TYPE STRING,
ANFME TYPE STRING,
ALTME TYPE STRING,
CHARG TYPE STRING,
NLTYP TYPE STRING,
NLBER TYPE STRING,
NLPLA TYPE STRING,
NPPOS TYPE STRING,
NLENR TYPE STRING,
LETYP TYPE STRING,
VLTYP TYPE STRING,
VLBER TYPE STRING,
VLPLA TYPE STRING,
VPPOS TYPE STRING,
VLENR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_L03B_TRITE_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_L03B_TRITE_STR-TBPOS sy-vline 
WA_L03B_TRITE_STR-ANFME sy-vline 
WA_L03B_TRITE_STR-ALTME sy-vline 
WA_L03B_TRITE_STR-CHARG sy-vline 
WA_L03B_TRITE_STR-NLTYP sy-vline 
WA_L03B_TRITE_STR-NLBER sy-vline 
WA_L03B_TRITE_STR-NLPLA sy-vline 
WA_L03B_TRITE_STR-NPPOS sy-vline 
WA_L03B_TRITE_STR-NLENR sy-vline 
WA_L03B_TRITE_STR-LETYP sy-vline 
WA_L03B_TRITE_STR-VLTYP sy-vline 
WA_L03B_TRITE_STR-VLBER sy-vline 
WA_L03B_TRITE_STR-VLPLA sy-vline 
WA_L03B_TRITE_STR-VPPOS sy-vline 
WA_L03B_TRITE_STR-VLENR sy-vline      INTO ld_text SEPARATED BY SPACE.

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