ABAP Select data from SAP table LTBK into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTBK
*  INTO TABLE @DATA(IT_LTBK2).
*--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_LTBK INDEX 1 INTO DATA(WA_LTBK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTBK>-MANDT = 1.
<LTBK>-LGNUM = 1.
<LTBK>-TBNUM = 1.
<LTBK>-STATU = 1.
<LTBK>-TRART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTBK-TBPRI, sy-vline,
  WA_LTBK-BNAME, sy-vline,
  WA_LTBK-BDATU, sy-vline,
  WA_LTBK-BZEIT, sy-vline,
  WA_LTBK-TBKTX, sy-vline,
  WA_LTBK-BETYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTBK 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_LTBK 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_LTBK INTO WA_LTBK.


*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 BENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LTBK-BENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTBK-BENUM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_LTBK-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTBK-MJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PKNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LTBK-PKNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTBK-PKNUM.
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_LTBK_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
TBNUM TYPE STRING,
STATU TYPE STRING,
TRART TYPE STRING,
TBPRI TYPE STRING,
BNAME TYPE STRING,
BDATU TYPE STRING,
BZEIT TYPE STRING,
TBKTX TYPE STRING,
BETYP TYPE STRING,
BENUM TYPE STRING,
BWART TYPE STRING,
BWLVS TYPE STRING,
VLTYP TYPE STRING,
VLPLA TYPE STRING,
VKDYN TYPE STRING,
NLTYP TYPE STRING,
NLPLA TYPE STRING,
NKDYN TYPE STRING,
PDATU TYPE STRING,
PZEIT TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ANZPS TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
KLFR2 TYPE STRING,
KFAR2 TYPE STRING,
TBRUE TYPE STRING,
RSNUM TYPE STRING,
LZNUM TYPE STRING,
AUTTA TYPE STRING,
BDART TYPE STRING,
PKNUM TYPE STRING,
PKPOS TYPE STRING,
DIRTA TYPE STRING,
KBNKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTBK_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_LTBK_STR-MANDT sy-vline 
WA_LTBK_STR-LGNUM sy-vline 
WA_LTBK_STR-TBNUM sy-vline 
WA_LTBK_STR-STATU sy-vline 
WA_LTBK_STR-TRART sy-vline 
WA_LTBK_STR-TBPRI sy-vline 
WA_LTBK_STR-BNAME sy-vline 
WA_LTBK_STR-BDATU sy-vline 
WA_LTBK_STR-BZEIT sy-vline 
WA_LTBK_STR-TBKTX sy-vline 
WA_LTBK_STR-BETYP sy-vline 
WA_LTBK_STR-BENUM sy-vline 
WA_LTBK_STR-BWART sy-vline 
WA_LTBK_STR-BWLVS sy-vline 
WA_LTBK_STR-VLTYP sy-vline 
WA_LTBK_STR-VLPLA sy-vline 
WA_LTBK_STR-VKDYN sy-vline 
WA_LTBK_STR-NLTYP sy-vline 
WA_LTBK_STR-NLPLA sy-vline 
WA_LTBK_STR-NKDYN sy-vline 
WA_LTBK_STR-PDATU sy-vline 
WA_LTBK_STR-PZEIT sy-vline 
WA_LTBK_STR-MBLNR sy-vline 
WA_LTBK_STR-MJAHR sy-vline 
WA_LTBK_STR-ANZPS sy-vline 
WA_LTBK_STR-BRGEW sy-vline 
WA_LTBK_STR-GEWEI sy-vline 
WA_LTBK_STR-KLFR2 sy-vline 
WA_LTBK_STR-KFAR2 sy-vline 
WA_LTBK_STR-TBRUE sy-vline 
WA_LTBK_STR-RSNUM sy-vline 
WA_LTBK_STR-LZNUM sy-vline 
WA_LTBK_STR-AUTTA sy-vline 
WA_LTBK_STR-BDART sy-vline 
WA_LTBK_STR-PKNUM sy-vline 
WA_LTBK_STR-PKPOS sy-vline 
WA_LTBK_STR-DIRTA sy-vline 
WA_LTBK_STR-KBNKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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