ABAP Select data from SAP table LVEKP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LVEKP
*  INTO TABLE @DATA(IT_LVEKP2).
*--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_LVEKP INDEX 1 INTO DATA(WA_LVEKP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LVEKP>-KREUZ = 1.
<LVEKP>-TAERZ = 1.
<LVEKP>-VBELN = 1.
<LVEKP>-POSNR = 1.
<LVEKP>-MATNR_ITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LVEKP-ARKTX_ITEM, sy-vline,
  WA_LVEKP-WERKS_ITEM, sy-vline,
  WA_LVEKP-LGORT_ITEM, sy-vline,
  WA_LVEKP-CHARG_ITEM, sy-vline,
  WA_LVEKP-SOBKZ_ITEM, sy-vline,
  WA_LVEKP-SONUM_ITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LVEKP 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_LVEKP 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_LVEKP INTO WA_LVEKP.


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

*Conversion exit MATN1, internal->external for field MATNR_ITEM
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LVEKP-MATNR_ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LVEKP-MATNR_ITEM.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit SPDEV, internal->external for field LDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_LVEKP-LDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LVEKP-LDEST.
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_LVEKP_STR, 
KREUZ TYPE STRING,
TAERZ TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
MATNR_ITEM TYPE STRING,
ARKTX_ITEM TYPE STRING,
WERKS_ITEM TYPE STRING,
LGORT_ITEM TYPE STRING,
CHARG_ITEM TYPE STRING,
SOBKZ_ITEM TYPE STRING,
SONUM_ITEM TYPE STRING,
BESTQ_ITEM TYPE STRING,
EIMNG_ITEM TYPE STRING,
EIMEA_ITEM TYPE STRING,
EIM1A_ITEM TYPE STRING,
AUMNG_ITEM TYPE STRING,
AUMEA_ITEM TYPE STRING,
AUM1A_ITEM TYPE STRING,
MEINS_ITEM TYPE STRING,
VRKME_ITEM TYPE STRING,
UMVKZ_ITEM TYPE STRING,
UMVKN_ITEM TYPE STRING,
NLTYP TYPE STRING,
NLBER TYPE STRING,
NLPLA TYPE STRING,
LETYP TYPE STRING,
LDEST TYPE STRING,
LELAS TYPE STRING,
WDATU TYPE STRING,
VFDAT TYPE STRING,
ZEUGN TYPE STRING,
KZVFD TYPE STRING,
VLTYP TYPE STRING,
VLPLA TYPE STRING,
SQUIT TYPE STRING,
SGT_SCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LVEKP_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_LVEKP_STR-KREUZ sy-vline 
WA_LVEKP_STR-TAERZ sy-vline 
WA_LVEKP_STR-VBELN sy-vline 
WA_LVEKP_STR-POSNR sy-vline 
WA_LVEKP_STR-MATNR_ITEM sy-vline 
WA_LVEKP_STR-ARKTX_ITEM sy-vline 
WA_LVEKP_STR-WERKS_ITEM sy-vline 
WA_LVEKP_STR-LGORT_ITEM sy-vline 
WA_LVEKP_STR-CHARG_ITEM sy-vline 
WA_LVEKP_STR-SOBKZ_ITEM sy-vline 
WA_LVEKP_STR-SONUM_ITEM sy-vline 
WA_LVEKP_STR-BESTQ_ITEM sy-vline 
WA_LVEKP_STR-EIMNG_ITEM sy-vline 
WA_LVEKP_STR-EIMEA_ITEM sy-vline 
WA_LVEKP_STR-EIM1A_ITEM sy-vline 
WA_LVEKP_STR-AUMNG_ITEM sy-vline 
WA_LVEKP_STR-AUMEA_ITEM sy-vline 
WA_LVEKP_STR-AUM1A_ITEM sy-vline 
WA_LVEKP_STR-MEINS_ITEM sy-vline 
WA_LVEKP_STR-VRKME_ITEM sy-vline 
WA_LVEKP_STR-UMVKZ_ITEM sy-vline 
WA_LVEKP_STR-UMVKN_ITEM sy-vline 
WA_LVEKP_STR-NLTYP sy-vline 
WA_LVEKP_STR-NLBER sy-vline 
WA_LVEKP_STR-NLPLA sy-vline 
WA_LVEKP_STR-LETYP sy-vline 
WA_LVEKP_STR-LDEST sy-vline 
WA_LVEKP_STR-LELAS sy-vline 
WA_LVEKP_STR-WDATU sy-vline 
WA_LVEKP_STR-VFDAT sy-vline 
WA_LVEKP_STR-ZEUGN sy-vline 
WA_LVEKP_STR-KZVFD sy-vline 
WA_LVEKP_STR-VLTYP sy-vline 
WA_LVEKP_STR-VLPLA sy-vline 
WA_LVEKP_STR-SQUIT sy-vline 
WA_LVEKP_STR-SGT_SCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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