ABAP Select data from SAP table E2LINVX into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2LINVX 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 E2LINVX. 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 E2LINVX 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_E2LINVX TYPE STANDARD TABLE OF E2LINVX,
      WA_E2LINVX TYPE E2LINVX,
      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: <E2LINVX> TYPE E2LINVX.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2LINVX.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2LINVX
  INTO TABLE IT_E2LINVX.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2LINVX
*  INTO TABLE @DATA(IT_E2LINVX2).
*--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_E2LINVX INDEX 1 INTO DATA(WA_E2LINVX2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2LINVX ASSIGNING <E2LINVX>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2LINVX>-LGNUM = 1.
<E2LINVX>-IVNUM = 1.
<E2LINVX>-IVPOS = 1.
<E2LINVX>-LGTYP = 1.
<E2LINVX>-LGPLA = 1.

ENDLOOP.

LOOP AT IT_E2LINVX INTO WA_E2LINVX.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2LINVX-PLPOS, sy-vline,
  WA_E2LINVX-MATNR, sy-vline,
  WA_E2LINVX-WERKS, sy-vline,
  WA_E2LINVX-CHARG, sy-vline,
  WA_E2LINVX-SOBKZ, sy-vline,
  WA_E2LINVX-LSONR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2LINVX 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_E2LINVX 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_E2LINVX INTO WA_E2LINVX.


*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 IVNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2LINVX-IVNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2LINVX-IVNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_E2LINVX-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2LINVX-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_E2LINVX-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2LINVX-LENUM.
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_E2LINVX_STR, 
LGNUM TYPE STRING,
IVNUM TYPE STRING,
IVPOS TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
PLPOS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LSONR TYPE STRING,
BESTQ TYPE STRING,
WDATU TYPE STRING,
LENUM TYPE STRING,
MENGA TYPE STRING,
ALTME TYPE STRING,
LQNUM TYPE STRING,
NANUM TYPE STRING,
NVERS TYPE STRING,
ISTAT TYPE STRING,
IDATU TYPE STRING,
KZINV TYPE STRING,
IRNUM TYPE STRING,
MAKTX TYPE STRING,
ISEIT TYPE STRING,
LETYP TYPE STRING,
KZNUL TYPE STRING,
VFDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2LINVX_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_E2LINVX_STR-LGNUM sy-vline 
WA_E2LINVX_STR-IVNUM sy-vline 
WA_E2LINVX_STR-IVPOS sy-vline 
WA_E2LINVX_STR-LGTYP sy-vline 
WA_E2LINVX_STR-LGPLA sy-vline 
WA_E2LINVX_STR-PLPOS sy-vline 
WA_E2LINVX_STR-MATNR sy-vline 
WA_E2LINVX_STR-WERKS sy-vline 
WA_E2LINVX_STR-CHARG sy-vline 
WA_E2LINVX_STR-SOBKZ sy-vline 
WA_E2LINVX_STR-LSONR sy-vline 
WA_E2LINVX_STR-BESTQ sy-vline 
WA_E2LINVX_STR-WDATU sy-vline 
WA_E2LINVX_STR-LENUM sy-vline 
WA_E2LINVX_STR-MENGA sy-vline 
WA_E2LINVX_STR-ALTME sy-vline 
WA_E2LINVX_STR-LQNUM sy-vline 
WA_E2LINVX_STR-NANUM sy-vline 
WA_E2LINVX_STR-NVERS sy-vline 
WA_E2LINVX_STR-ISTAT sy-vline 
WA_E2LINVX_STR-IDATU sy-vline 
WA_E2LINVX_STR-KZINV sy-vline 
WA_E2LINVX_STR-IRNUM sy-vline 
WA_E2LINVX_STR-MAKTX sy-vline 
WA_E2LINVX_STR-ISEIT sy-vline 
WA_E2LINVX_STR-LETYP sy-vline 
WA_E2LINVX_STR-KZNUL sy-vline 
WA_E2LINVX_STR-VFDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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