ABAP Select data from SAP table V_T045L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T045L 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 V_T045L. 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 V_T045L 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_V_T045L TYPE STANDARD TABLE OF V_T045L,
      WA_V_T045L TYPE V_T045L,
      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: <V_T045L> TYPE V_T045L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T045L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T045L
  INTO TABLE IT_V_T045L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T045L
*  INTO TABLE @DATA(IT_V_T045L2).
*--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_V_T045L INDEX 1 INTO DATA(WA_V_T045L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T045L ASSIGNING <V_T045L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T045L>-MANDT = 1.
<V_T045L>-LAND1 = 1.
<V_T045L>-WVERW = 1.
<V_T045L>-CASES = 1.
<V_T045L>-ZLSCH = 1.

ENDLOOP.

LOOP AT IT_V_T045L INTO WA_V_T045L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T045L-WAERS, sy-vline,
  WA_V_T045L-GRBTR, sy-vline,
  WA_V_T045L-GRTAG, sy-vline,
  WA_V_T045L-VALID, sy-vline,
  WA_V_T045L-WEPRI, sy-vline,
  WA_V_T045L-MIBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T045L 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_V_T045L 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_V_T045L INTO WA_V_T045L.


*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 AU132, internal->external for field MIBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_V_T045L-MIBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T045L-MIBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field GEBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_V_T045L-GEBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T045L-GEBTR.
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_V_T045L_STR, 
MANDT TYPE STRING,
LAND1 TYPE STRING,
WVERW TYPE STRING,
CASES TYPE STRING,
ZLSCH TYPE STRING,
WAERS TYPE STRING,
GRBTR TYPE STRING,
GRTAG TYPE STRING,
VALID TYPE STRING,
WEPRI TYPE STRING,
MIBTR TYPE STRING,
MIZIT TYPE STRING,
GSATZ TYPE STRING,
CALTY TYPE STRING,
GEBTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T045L_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_V_T045L_STR-MANDT sy-vline 
WA_V_T045L_STR-LAND1 sy-vline 
WA_V_T045L_STR-WVERW sy-vline 
WA_V_T045L_STR-CASES sy-vline 
WA_V_T045L_STR-ZLSCH sy-vline 
WA_V_T045L_STR-WAERS sy-vline 
WA_V_T045L_STR-GRBTR sy-vline 
WA_V_T045L_STR-GRTAG sy-vline 
WA_V_T045L_STR-VALID sy-vline 
WA_V_T045L_STR-WEPRI sy-vline 
WA_V_T045L_STR-MIBTR sy-vline 
WA_V_T045L_STR-MIZIT sy-vline 
WA_V_T045L_STR-GSATZ sy-vline 
WA_V_T045L_STR-CALTY sy-vline 
WA_V_T045L_STR-GEBTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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