ABAP Select data from SAP table EDOC_LE_KNA1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EDOC_LE_KNA1 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 EDOC_LE_KNA1. 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 EDOC_LE_KNA1 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_EDOC_LE_KNA1 TYPE STANDARD TABLE OF EDOC_LE_KNA1,
      WA_EDOC_LE_KNA1 TYPE EDOC_LE_KNA1,
      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: <EDOC_LE_KNA1> TYPE EDOC_LE_KNA1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_EDOC_LE_KNA1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM EDOC_LE_KNA1
  INTO TABLE IT_EDOC_LE_KNA1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EDOC_LE_KNA1
*  INTO TABLE @DATA(IT_EDOC_LE_KNA12).
*--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_EDOC_LE_KNA1 INDEX 1 INTO DATA(WA_EDOC_LE_KNA12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_EDOC_LE_KNA1 ASSIGNING <EDOC_LE_KNA1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EDOC_LE_KNA1>-CUSTOMER = 1.
<EDOC_LE_KNA1>-CUSTOMERNAME = 1.
<EDOC_LE_KNA1>-CUSTOMERFULLNAME = 1.
<EDOC_LE_KNA1>-ADDRESSID = 1.
<EDOC_LE_KNA1>-CUSTOMERCLASSIFICATION = 1.

ENDLOOP.

LOOP AT IT_EDOC_LE_KNA1 INTO WA_EDOC_LE_KNA1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EDOC_LE_KNA1-VATREGISTRATION, sy-vline,
  WA_EDOC_LE_KNA1-INTERNATIONALLOCATIONNUMBER1, sy-vline,
  WA_EDOC_LE_KNA1-ISONETIMEACCOUNT, sy-vline,
  WA_EDOC_LE_KNA1-TAXJURISDICTION, sy-vline,
  WA_EDOC_LE_KNA1-INDUSTRY, sy-vline,
  WA_EDOC_LE_KNA1-TAXNUMBERTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EDOC_LE_KNA1 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_EDOC_LE_KNA1 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_EDOC_LE_KNA1 INTO WA_EDOC_LE_KNA1.


*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 CUSTOMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EDOC_LE_KNA1-CUSTOMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDOC_LE_KNA1-CUSTOMER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADDRESSID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EDOC_LE_KNA1-ADDRESSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDOC_LE_KNA1-ADDRESSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EDOC_LE_KNA1-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDOC_LE_KNA1-SUPPLIER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EDOC_LE_KNA1-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDOC_LE_KNA1-LANGUAGE.
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_EDOC_LE_KNA1_STR, 
CUSTOMER TYPE STRING,
CUSTOMERNAME TYPE STRING,
CUSTOMERFULLNAME TYPE STRING,
ADDRESSID TYPE STRING,
CUSTOMERCLASSIFICATION TYPE STRING,
VATREGISTRATION TYPE STRING,
INTERNATIONALLOCATIONNUMBER1 TYPE STRING,
ISONETIMEACCOUNT TYPE STRING,
TAXJURISDICTION TYPE STRING,
INDUSTRY TYPE STRING,
TAXNUMBERTYPE TYPE STRING,
TAXNUMBER1 TYPE STRING,
TAXNUMBER2 TYPE STRING,
TAXNUMBER3 TYPE STRING,
TAXNUMBER4 TYPE STRING,
TAXNUMBER5 TYPE STRING,
CUSTOMERCORPORATEGROUP TYPE STRING,
SUPPLIER TYPE STRING,
INDUSTRYCODE1 TYPE STRING,
INDUSTRYCODE2 TYPE STRING,
INDUSTRYCODE3 TYPE STRING,
INDUSTRYCODE4 TYPE STRING,
INDUSTRYCODE5 TYPE STRING,
COUNTRY TYPE STRING,
ORGANIZATIONBPNAME1 TYPE STRING,
ORGANIZATIONBPNAME2 TYPE STRING,
LANGUAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EDOC_LE_KNA1_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_EDOC_LE_KNA1_STR-CUSTOMER sy-vline 
WA_EDOC_LE_KNA1_STR-CUSTOMERNAME sy-vline 
WA_EDOC_LE_KNA1_STR-CUSTOMERFULLNAME sy-vline 
WA_EDOC_LE_KNA1_STR-ADDRESSID sy-vline 
WA_EDOC_LE_KNA1_STR-CUSTOMERCLASSIFICATION sy-vline 
WA_EDOC_LE_KNA1_STR-VATREGISTRATION sy-vline 
WA_EDOC_LE_KNA1_STR-INTERNATIONALLOCATIONNUMBER1 sy-vline 
WA_EDOC_LE_KNA1_STR-ISONETIMEACCOUNT sy-vline 
WA_EDOC_LE_KNA1_STR-TAXJURISDICTION sy-vline 
WA_EDOC_LE_KNA1_STR-INDUSTRY sy-vline 
WA_EDOC_LE_KNA1_STR-TAXNUMBERTYPE sy-vline 
WA_EDOC_LE_KNA1_STR-TAXNUMBER1 sy-vline 
WA_EDOC_LE_KNA1_STR-TAXNUMBER2 sy-vline 
WA_EDOC_LE_KNA1_STR-TAXNUMBER3 sy-vline 
WA_EDOC_LE_KNA1_STR-TAXNUMBER4 sy-vline 
WA_EDOC_LE_KNA1_STR-TAXNUMBER5 sy-vline 
WA_EDOC_LE_KNA1_STR-CUSTOMERCORPORATEGROUP sy-vline 
WA_EDOC_LE_KNA1_STR-SUPPLIER sy-vline 
WA_EDOC_LE_KNA1_STR-INDUSTRYCODE1 sy-vline 
WA_EDOC_LE_KNA1_STR-INDUSTRYCODE2 sy-vline 
WA_EDOC_LE_KNA1_STR-INDUSTRYCODE3 sy-vline 
WA_EDOC_LE_KNA1_STR-INDUSTRYCODE4 sy-vline 
WA_EDOC_LE_KNA1_STR-INDUSTRYCODE5 sy-vline 
WA_EDOC_LE_KNA1_STR-COUNTRY sy-vline 
WA_EDOC_LE_KNA1_STR-ORGANIZATIONBPNAME1 sy-vline 
WA_EDOC_LE_KNA1_STR-ORGANIZATIONBPNAME2 sy-vline 
WA_EDOC_LE_KNA1_STR-LANGUAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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