ABAP Select data from SAP table KOMZRLE_LI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMZRLE_LI
*  INTO TABLE @DATA(IT_KOMZRLE_LI2).
*--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_KOMZRLE_LI INDEX 1 INTO DATA(WA_KOMZRLE_LI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMZRLE_LI>-DOCNUM = 1.
<KOMZRLE_LI>-STATUS = 1.
<KOMZRLE_LI>-STATXT = 1.
<KOMZRLE_LI>-CREDAT = 1.
<KOMZRLE_LI>-CRETIM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMZRLE_LI-WBELN, sy-vline,
  WA_KOMZRLE_LI-WRART, sy-vline,
  WA_KOMZRLE_LI-LIFRE, sy-vline,
  WA_KOMZRLE_LI-BLDAT, sy-vline,
  WA_KOMZRLE_LI-XBLNR, sy-vline,
  WA_KOMZRLE_LI-RBRTWR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMZRLE_LI 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_KOMZRLE_LI 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_KOMZRLE_LI INTO WA_KOMZRLE_LI.


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

*Conversion exit ALPHA, internal->external for field LIFRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMZRLE_LI-LIFRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMZRLE_LI-LIFRE.
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_KOMZRLE_LI_STR, 
DOCNUM TYPE STRING,
STATUS TYPE STRING,
STATXT TYPE STRING,
CREDAT TYPE STRING,
CRETIM TYPE STRING,
WBELN TYPE STRING,
WRART TYPE STRING,
LIFRE TYPE STRING,
BLDAT TYPE STRING,
XBLNR TYPE STRING,
RBRTWR TYPE STRING,
WAERL TYPE STRING,
BUKRS TYPE STRING,
EKORG TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
WFDAT TYPE STRING,
ZUONR TYPE STRING,
KIDNO TYPE STRING,
ZTERM TYPE STRING,
VALTG TYPE STRING,
VALDT TYPE STRING,
NAME1 TYPE STRING,
ORT01 TYPE STRING,
DESCRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMZRLE_LI_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_KOMZRLE_LI_STR-DOCNUM sy-vline 
WA_KOMZRLE_LI_STR-STATUS sy-vline 
WA_KOMZRLE_LI_STR-STATXT sy-vline 
WA_KOMZRLE_LI_STR-CREDAT sy-vline 
WA_KOMZRLE_LI_STR-CRETIM sy-vline 
WA_KOMZRLE_LI_STR-WBELN sy-vline 
WA_KOMZRLE_LI_STR-WRART sy-vline 
WA_KOMZRLE_LI_STR-LIFRE sy-vline 
WA_KOMZRLE_LI_STR-BLDAT sy-vline 
WA_KOMZRLE_LI_STR-XBLNR sy-vline 
WA_KOMZRLE_LI_STR-RBRTWR sy-vline 
WA_KOMZRLE_LI_STR-WAERL sy-vline 
WA_KOMZRLE_LI_STR-BUKRS sy-vline 
WA_KOMZRLE_LI_STR-EKORG sy-vline 
WA_KOMZRLE_LI_STR-VKORG sy-vline 
WA_KOMZRLE_LI_STR-VTWEG sy-vline 
WA_KOMZRLE_LI_STR-SPART sy-vline 
WA_KOMZRLE_LI_STR-WFDAT sy-vline 
WA_KOMZRLE_LI_STR-ZUONR sy-vline 
WA_KOMZRLE_LI_STR-KIDNO sy-vline 
WA_KOMZRLE_LI_STR-ZTERM sy-vline 
WA_KOMZRLE_LI_STR-VALTG sy-vline 
WA_KOMZRLE_LI_STR-VALDT sy-vline 
WA_KOMZRLE_LI_STR-NAME1 sy-vline 
WA_KOMZRLE_LI_STR-ORT01 sy-vline 
WA_KOMZRLE_LI_STR-DESCRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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