ABAP Select data from SAP table /ISDFPS/BAPI_LEIN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ISDFPS/BAPI_LEIN 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 /ISDFPS/BAPI_LEIN. 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 /ISDFPS/BAPI_LEIN 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_/ISDFPS/BAPI_LEIN TYPE STANDARD TABLE OF /ISDFPS/BAPI_LEIN,
      WA_/ISDFPS/BAPI_LEIN TYPE /ISDFPS/BAPI_LEIN,
      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: </ISDFPS/BAPI_LEIN> TYPE /ISDFPS/BAPI_LEIN.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ISDFPS/BAPI_LEIN
  INTO TABLE IT_/ISDFPS/BAPI_LEIN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/BAPI_LEIN
*  INTO TABLE @DATA(IT_/ISDFPS/BAPI_LEIN2).
*--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_/ISDFPS/BAPI_LEIN INDEX 1 INTO DATA(WA_/ISDFPS/BAPI_LEIN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ISDFPS/BAPI_LEIN ASSIGNING </ISDFPS/BAPI_LEIN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/BAPI_LEIN>-LENUM = 1.
</ISDFPS/BAPI_LEIN>-LGNUM = 1.
</ISDFPS/BAPI_LEIN>-LETYP = 1.
</ISDFPS/BAPI_LEIN>-LGTYP = 1.
</ISDFPS/BAPI_LEIN>-LGPLA = 1.

ENDLOOP.

LOOP AT IT_/ISDFPS/BAPI_LEIN INTO WA_/ISDFPS/BAPI_LEIN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/BAPI_LEIN-SKZUA, sy-vline,
  WA_/ISDFPS/BAPI_LEIN-SKZUE, sy-vline,
  WA_/ISDFPS/BAPI_LEIN-SPGRU, sy-vline,
  WA_/ISDFPS/BAPI_LEIN-STATU, sy-vline,
  WA_/ISDFPS/BAPI_LEIN-ANZQU, sy-vline,
  WA_/ISDFPS/BAPI_LEIN-BDATU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/BAPI_LEIN 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_/ISDFPS/BAPI_LEIN 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_/ISDFPS/BAPI_LEIN INTO WA_/ISDFPS/BAPI_LEIN.


*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 LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/BAPI_LEIN-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/BAPI_LEIN-LENUM.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/BAPI_LEIN-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/BAPI_LEIN-VBELN.
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_/ISDFPS/BAPI_LEIN_STR, 
LENUM TYPE STRING,
LGNUM TYPE STRING,
LETYP TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
SKZUA TYPE STRING,
SKZUE TYPE STRING,
SPGRU TYPE STRING,
STATU TYPE STRING,
ANZQU TYPE STRING,
BDATU TYPE STRING,
BZEIT TYPE STRING,
BTANR TYPE STRING,
BTAPS TYPE STRING,
MGEWI TYPE STRING,
GEWEI TYPE STRING,
PLPOS TYPE STRING,
AOFTA TYPE STRING,
REFNR TYPE STRING,
UVTYP TYPE STRING,
UVPLA TYPE STRING,
KKAPV TYPE STRING,
OKAPV TYPE STRING,
NPLEI TYPE STRING,
UVPOS TYPE STRING,
UVQNR TYPE STRING,
WETYP TYPE STRING,
WEPLA TYPE STRING,
WESTA TYPE STRING,
WEAQU TYPE STRING,
VBELN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/BAPI_LEIN_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_/ISDFPS/BAPI_LEIN_STR-LENUM sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-LGNUM sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-LETYP sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-LGTYP sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-LGPLA sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-SKZUA sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-SKZUE sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-SPGRU sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-STATU sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-ANZQU sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-BDATU sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-BZEIT sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-BTANR sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-BTAPS sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-MGEWI sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-GEWEI sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-PLPOS sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-AOFTA sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-REFNR sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-UVTYP sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-UVPLA sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-KKAPV sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-OKAPV sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-NPLEI sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-UVPOS sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-UVQNR sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-WETYP sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-WEPLA sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-WESTA sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-WEAQU sy-vline 
WA_/ISDFPS/BAPI_LEIN_STR-VBELN sy-vline      INTO ld_text SEPARATED BY SPACE.

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