ABAP Select data from SAP table LTAK_VB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTAK_VB
*  INTO TABLE @DATA(IT_LTAK_VB2).
*--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_LTAK_VB INDEX 1 INTO DATA(WA_LTAK_VB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTAK_VB>-MANDT = 1.
<LTAK_VB>-LGNUM = 1.
<LTAK_VB>-TANUM = 1.
<LTAK_VB>-BWART = 1.
<LTAK_VB>-BWLVS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTAK_VB-TBPRI, sy-vline,
  WA_LTAK_VB-TRART, sy-vline,
  WA_LTAK_VB-BDATU, sy-vline,
  WA_LTAK_VB-BZEIT, sy-vline,
  WA_LTAK_VB-BNAME, sy-vline,
  WA_LTAK_VB-REFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTAK_VB 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_LTAK_VB 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_LTAK_VB INTO WA_LTAK_VB.


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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field ZEIEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LTAK_VB-ZEIEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTAK_VB-ZEIEI.
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_LTAK_VB_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
TANUM TYPE STRING,
BWART TYPE STRING,
BWLVS TYPE STRING,
TBPRI TYPE STRING,
TRART TYPE STRING,
BDATU TYPE STRING,
BZEIT TYPE STRING,
BNAME TYPE STRING,
REFNR TYPE STRING,
TBNUM TYPE STRING,
UBNUM TYPE STRING,
VBELN TYPE STRING,
KQUIT TYPE STRING,
QDATU TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
BETYP TYPE STRING,
BENUM TYPE STRING,
DRUKZ TYPE STRING,
DRUCK TYPE STRING,
TEILK TYPE STRING,
KR2SO TYPE STRING,
KR2KU TYPE STRING,
KDISO TYPE STRING,
KZPLA TYPE STRING,
PLDAT TYPE STRING,
RSNUM TYPE STRING,
LZNUM TYPE STRING,
BDART TYPE STRING,
PKNUM TYPE STRING,
PKPOS TYPE STRING,
KZLEI TYPE STRING,
KISTZ TYPE STRING,
KISTP TYPE STRING,
PERNR TYPE STRING,
SOLWM TYPE STRING,
SOLEX TYPE STRING,
ISTWM TYPE STRING,
ZEIEI TYPE STRING,
HRSTS TYPE STRING,
STDAT TYPE STRING,
ENDAT TYPE STRING,
STUZT TYPE STRING,
ENUZT TYPE STRING,
L2SKA TYPE STRING,
MINWM TYPE STRING,
LGTOR TYPE STRING,
LGBZO TYPE STRING,
KZVEP TYPE STRING,
SWABW TYPE STRING,
AUSFB TYPE STRING,
SPEZI TYPE STRING,
VBTYP TYPE STRING,
QUEUE TYPE STRING,
KGVNQ TYPE STRING,
TAPRI TYPE STRING,
KVQUI TYPE STRING,
HUCON TYPE STRING,
NOITM TYPE STRING,
KZTRM TYPE STRING,
LATER TYPE STRING,
PASSD TYPE STRING,
MULTL TYPE STRING,
LFDAT TYPE STRING,
LFUHR TYPE STRING,
CNTPS TYPE STRING,
NIDRU TYPE STRING,
ACTDA TYPE STRING,
TEIL2 TYPE STRING,
TEILD TYPE STRING,
BITEM TYPE STRING,
KOMIM TYPE STRING,
EINLM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTAK_VB_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_LTAK_VB_STR-MANDT sy-vline 
WA_LTAK_VB_STR-LGNUM sy-vline 
WA_LTAK_VB_STR-TANUM sy-vline 
WA_LTAK_VB_STR-BWART sy-vline 
WA_LTAK_VB_STR-BWLVS sy-vline 
WA_LTAK_VB_STR-TBPRI sy-vline 
WA_LTAK_VB_STR-TRART sy-vline 
WA_LTAK_VB_STR-BDATU sy-vline 
WA_LTAK_VB_STR-BZEIT sy-vline 
WA_LTAK_VB_STR-BNAME sy-vline 
WA_LTAK_VB_STR-REFNR sy-vline 
WA_LTAK_VB_STR-TBNUM sy-vline 
WA_LTAK_VB_STR-UBNUM sy-vline 
WA_LTAK_VB_STR-VBELN sy-vline 
WA_LTAK_VB_STR-KQUIT sy-vline 
WA_LTAK_VB_STR-QDATU sy-vline 
WA_LTAK_VB_STR-MBLNR sy-vline 
WA_LTAK_VB_STR-MJAHR sy-vline 
WA_LTAK_VB_STR-BETYP sy-vline 
WA_LTAK_VB_STR-BENUM sy-vline 
WA_LTAK_VB_STR-DRUKZ sy-vline 
WA_LTAK_VB_STR-DRUCK sy-vline 
WA_LTAK_VB_STR-TEILK sy-vline 
WA_LTAK_VB_STR-KR2SO sy-vline 
WA_LTAK_VB_STR-KR2KU sy-vline 
WA_LTAK_VB_STR-KDISO sy-vline 
WA_LTAK_VB_STR-KZPLA sy-vline 
WA_LTAK_VB_STR-PLDAT sy-vline 
WA_LTAK_VB_STR-RSNUM sy-vline 
WA_LTAK_VB_STR-LZNUM sy-vline 
WA_LTAK_VB_STR-BDART sy-vline 
WA_LTAK_VB_STR-PKNUM sy-vline 
WA_LTAK_VB_STR-PKPOS sy-vline 
WA_LTAK_VB_STR-KZLEI sy-vline 
WA_LTAK_VB_STR-KISTZ sy-vline 
WA_LTAK_VB_STR-KISTP sy-vline 
WA_LTAK_VB_STR-PERNR sy-vline 
WA_LTAK_VB_STR-SOLWM sy-vline 
WA_LTAK_VB_STR-SOLEX sy-vline 
WA_LTAK_VB_STR-ISTWM sy-vline 
WA_LTAK_VB_STR-ZEIEI sy-vline 
WA_LTAK_VB_STR-HRSTS sy-vline 
WA_LTAK_VB_STR-STDAT sy-vline 
WA_LTAK_VB_STR-ENDAT sy-vline 
WA_LTAK_VB_STR-STUZT sy-vline 
WA_LTAK_VB_STR-ENUZT sy-vline 
WA_LTAK_VB_STR-L2SKA sy-vline 
WA_LTAK_VB_STR-MINWM sy-vline 
WA_LTAK_VB_STR-LGTOR sy-vline 
WA_LTAK_VB_STR-LGBZO sy-vline 
WA_LTAK_VB_STR-KZVEP sy-vline 
WA_LTAK_VB_STR-SWABW sy-vline 
WA_LTAK_VB_STR-AUSFB sy-vline 
WA_LTAK_VB_STR-SPEZI sy-vline 
WA_LTAK_VB_STR-VBTYP sy-vline 
WA_LTAK_VB_STR-QUEUE sy-vline 
WA_LTAK_VB_STR-KGVNQ sy-vline 
WA_LTAK_VB_STR-TAPRI sy-vline 
WA_LTAK_VB_STR-KVQUI sy-vline 
WA_LTAK_VB_STR-HUCON sy-vline 
WA_LTAK_VB_STR-NOITM sy-vline 
WA_LTAK_VB_STR-KZTRM sy-vline 
WA_LTAK_VB_STR-LATER sy-vline 
WA_LTAK_VB_STR-PASSD sy-vline 
WA_LTAK_VB_STR-MULTL sy-vline 
WA_LTAK_VB_STR-LFDAT sy-vline 
WA_LTAK_VB_STR-LFUHR sy-vline 
WA_LTAK_VB_STR-CNTPS sy-vline 
WA_LTAK_VB_STR-NIDRU sy-vline 
WA_LTAK_VB_STR-ACTDA sy-vline 
WA_LTAK_VB_STR-TEIL2 sy-vline 
WA_LTAK_VB_STR-TEILD sy-vline 
WA_LTAK_VB_STR-BITEM sy-vline 
WA_LTAK_VB_STR-KOMIM sy-vline 
WA_LTAK_VB_STR-EINLM sy-vline      INTO ld_text SEPARATED BY SPACE.

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