ABAP Select data from SAP table BCKNEX into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BCKNEX 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 BCKNEX. 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 BCKNEX 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_BCKNEX TYPE STANDARD TABLE OF BCKNEX,
      WA_BCKNEX TYPE BCKNEX,
      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: <BCKNEX> TYPE BCKNEX.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BCKNEX
*  INTO TABLE @DATA(IT_BCKNEX2).
*--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_BCKNEX INDEX 1 INTO DATA(WA_BCKNEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BCKNEX>-MANDT = 1.
<BCKNEX>-KUNNR = 1.
<BCKNEX>-LNDEX = 1.
<BCKNEX>-TDOCO = 1.
<BCKNEX>-TDODA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BCKNEX-SDNCO, sy-vline,
  WA_BCKNEX-SDNDA, sy-vline,
  WA_BCKNEX-DHRCO, sy-vline,
  WA_BCKNEX-DHRDA, sy-vline,
  WA_BCKNEX-BL1CO, sy-vline,
  WA_BCKNEX-BL1DA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BCKNEX 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_BCKNEX 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_BCKNEX INTO WA_BCKNEX.


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

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

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

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

*Conversion exit ALPHA, internal->external for field CITY_CODE2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BCKNEX-CITY_CODE2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BCKNEX-CITY_CODE2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_BCKNEX-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BCKNEX-LANGU.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LANGU_CREA
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_BCKNEX-LANGU_CREA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BCKNEX-LANGU_CREA.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field TOWNSHIP_CODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BCKNEX-TOWNSHIP_CODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BCKNEX-TOWNSHIP_CODE.
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_BCKNEX_STR, 
MANDT TYPE STRING,
KUNNR TYPE STRING,
LNDEX TYPE STRING,
TDOCO TYPE STRING,
TDODA TYPE STRING,
SDNCO TYPE STRING,
SDNDA TYPE STRING,
DHRCO TYPE STRING,
DHRDA TYPE STRING,
BL1CO TYPE STRING,
BL1DA TYPE STRING,
BL2CO TYPE STRING,
BL2DA TYPE STRING,
SLSCO TYPE STRING,
SLDCK TYPE STRING,
SLDST TYPE STRING,
SLDEN TYPE STRING,
TDOST TYPE STRING,
TDOEN TYPE STRING,
SDNST TYPE STRING,
SDNEN TYPE STRING,
DHRST TYPE STRING,
DHREN TYPE STRING,
BL1ST TYPE STRING,
BL1EN TYPE STRING,
BL2ST TYPE STRING,
BL2EN TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
TITLE TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
NAME_TXT TYPE STRING,
NAME_CO TYPE STRING,
CITY1 TYPE STRING,
CITY2 TYPE STRING,
CITY_CODE TYPE STRING,
CITYP_CODE TYPE STRING,
HOME_CITY TYPE STRING,
CITYH_CODE TYPE STRING,
CHCKSTATUS TYPE STRING,
REGIOGROUP TYPE STRING,
POST_CODE1 TYPE STRING,
POST_CODE2 TYPE STRING,
POST_CODE3 TYPE STRING,
PCODE1_EXT TYPE STRING,
PCODE2_EXT TYPE STRING,
PCODE3_EXT TYPE STRING,
PO_BOX TYPE STRING,
DONT_USE_P TYPE STRING,
PO_BOX_NUM TYPE STRING,
PO_BOX_LOC TYPE STRING,
CITY_CODE2 TYPE STRING,
PO_BOX_REG TYPE STRING,
PO_BOX_CTY TYPE STRING,
POSTALAREA TYPE STRING,
TRANSPZONE TYPE STRING,
STREET TYPE STRING,
DONT_USE_S TYPE STRING,
STREETCODE TYPE STRING,
STREETABBR TYPE STRING,
HOUSE_NUM1 TYPE STRING,
HOUSE_NUM2 TYPE STRING,
HOUSE_NUM3 TYPE STRING,
STR_SUPPL1 TYPE STRING,
STR_SUPPL2 TYPE STRING,
STR_SUPPL3 TYPE STRING,
LOCATION TYPE STRING,
BUILDING TYPE STRING,
FLOOR TYPE STRING,
ROOMNUMBER TYPE STRING,
COUNTRY TYPE STRING,
LANGU TYPE STRING,
REGION TYPE STRING,
SORT1 TYPE STRING,
SORT2 TYPE STRING,
SORT_PHN TYPE STRING,
ADDRORIGIN TYPE STRING,
EXTENSION1 TYPE STRING,
EXTENSION2 TYPE STRING,
TIME_ZONE TYPE STRING,
TAXJURCODE TYPE STRING,
ADDRESS_ID TYPE STRING,
REMARK TYPE STRING,
LANGU_CREA TYPE STRING,
PO_BOX_LOBBY TYPE STRING,
DELI_SERV_TYPE TYPE STRING,
DELI_SERV_NUMBER TYPE STRING,
COUNTY_CODE TYPE STRING,
COUNTY TYPE STRING,
TOWNSHIP_CODE TYPE STRING,
TOWNSHIP TYPE STRING,
DEFLT_COMM TYPE STRING,
XPCPT TYPE STRING,
TEL_NUMBER TYPE STRING,
TEL_EXTENS TYPE STRING,
FAX_NUMBER TYPE STRING,
FAX_EXTENS TYPE STRING,
EXP_CLA TYPE STRING,
SELFLAG TYPE STRING,
ICON_BLOCK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BCKNEX_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_BCKNEX_STR-MANDT sy-vline 
WA_BCKNEX_STR-KUNNR sy-vline 
WA_BCKNEX_STR-LNDEX sy-vline 
WA_BCKNEX_STR-TDOCO sy-vline 
WA_BCKNEX_STR-TDODA sy-vline 
WA_BCKNEX_STR-SDNCO sy-vline 
WA_BCKNEX_STR-SDNDA sy-vline 
WA_BCKNEX_STR-DHRCO sy-vline 
WA_BCKNEX_STR-DHRDA sy-vline 
WA_BCKNEX_STR-BL1CO sy-vline 
WA_BCKNEX_STR-BL1DA sy-vline 
WA_BCKNEX_STR-BL2CO sy-vline 
WA_BCKNEX_STR-BL2DA sy-vline 
WA_BCKNEX_STR-SLSCO sy-vline 
WA_BCKNEX_STR-SLDCK sy-vline 
WA_BCKNEX_STR-SLDST sy-vline 
WA_BCKNEX_STR-SLDEN sy-vline 
WA_BCKNEX_STR-TDOST sy-vline 
WA_BCKNEX_STR-TDOEN sy-vline 
WA_BCKNEX_STR-SDNST sy-vline 
WA_BCKNEX_STR-SDNEN sy-vline 
WA_BCKNEX_STR-DHRST sy-vline 
WA_BCKNEX_STR-DHREN sy-vline 
WA_BCKNEX_STR-BL1ST sy-vline 
WA_BCKNEX_STR-BL1EN sy-vline 
WA_BCKNEX_STR-BL2ST sy-vline 
WA_BCKNEX_STR-BL2EN sy-vline 
WA_BCKNEX_STR-DATE_FROM sy-vline 
WA_BCKNEX_STR-DATE_TO sy-vline 
WA_BCKNEX_STR-TITLE sy-vline 
WA_BCKNEX_STR-NAME1 sy-vline 
WA_BCKNEX_STR-NAME2 sy-vline 
WA_BCKNEX_STR-NAME3 sy-vline 
WA_BCKNEX_STR-NAME4 sy-vline 
WA_BCKNEX_STR-NAME_TXT sy-vline 
WA_BCKNEX_STR-NAME_CO sy-vline 
WA_BCKNEX_STR-CITY1 sy-vline 
WA_BCKNEX_STR-CITY2 sy-vline 
WA_BCKNEX_STR-CITY_CODE sy-vline 
WA_BCKNEX_STR-CITYP_CODE sy-vline 
WA_BCKNEX_STR-HOME_CITY sy-vline 
WA_BCKNEX_STR-CITYH_CODE sy-vline 
WA_BCKNEX_STR-CHCKSTATUS sy-vline 
WA_BCKNEX_STR-REGIOGROUP sy-vline 
WA_BCKNEX_STR-POST_CODE1 sy-vline 
WA_BCKNEX_STR-POST_CODE2 sy-vline 
WA_BCKNEX_STR-POST_CODE3 sy-vline 
WA_BCKNEX_STR-PCODE1_EXT sy-vline 
WA_BCKNEX_STR-PCODE2_EXT sy-vline 
WA_BCKNEX_STR-PCODE3_EXT sy-vline 
WA_BCKNEX_STR-PO_BOX sy-vline 
WA_BCKNEX_STR-DONT_USE_P sy-vline 
WA_BCKNEX_STR-PO_BOX_NUM sy-vline 
WA_BCKNEX_STR-PO_BOX_LOC sy-vline 
WA_BCKNEX_STR-CITY_CODE2 sy-vline 
WA_BCKNEX_STR-PO_BOX_REG sy-vline 
WA_BCKNEX_STR-PO_BOX_CTY sy-vline 
WA_BCKNEX_STR-POSTALAREA sy-vline 
WA_BCKNEX_STR-TRANSPZONE sy-vline 
WA_BCKNEX_STR-STREET sy-vline 
WA_BCKNEX_STR-DONT_USE_S sy-vline 
WA_BCKNEX_STR-STREETCODE sy-vline 
WA_BCKNEX_STR-STREETABBR sy-vline 
WA_BCKNEX_STR-HOUSE_NUM1 sy-vline 
WA_BCKNEX_STR-HOUSE_NUM2 sy-vline 
WA_BCKNEX_STR-HOUSE_NUM3 sy-vline 
WA_BCKNEX_STR-STR_SUPPL1 sy-vline 
WA_BCKNEX_STR-STR_SUPPL2 sy-vline 
WA_BCKNEX_STR-STR_SUPPL3 sy-vline 
WA_BCKNEX_STR-LOCATION sy-vline 
WA_BCKNEX_STR-BUILDING sy-vline 
WA_BCKNEX_STR-FLOOR sy-vline 
WA_BCKNEX_STR-ROOMNUMBER sy-vline 
WA_BCKNEX_STR-COUNTRY sy-vline 
WA_BCKNEX_STR-LANGU sy-vline 
WA_BCKNEX_STR-REGION sy-vline 
WA_BCKNEX_STR-SORT1 sy-vline 
WA_BCKNEX_STR-SORT2 sy-vline 
WA_BCKNEX_STR-SORT_PHN sy-vline 
WA_BCKNEX_STR-ADDRORIGIN sy-vline 
WA_BCKNEX_STR-EXTENSION1 sy-vline 
WA_BCKNEX_STR-EXTENSION2 sy-vline 
WA_BCKNEX_STR-TIME_ZONE sy-vline 
WA_BCKNEX_STR-TAXJURCODE sy-vline 
WA_BCKNEX_STR-ADDRESS_ID sy-vline 
WA_BCKNEX_STR-REMARK sy-vline 
WA_BCKNEX_STR-LANGU_CREA sy-vline 
WA_BCKNEX_STR-PO_BOX_LOBBY sy-vline 
WA_BCKNEX_STR-DELI_SERV_TYPE sy-vline 
WA_BCKNEX_STR-DELI_SERV_NUMBER sy-vline 
WA_BCKNEX_STR-COUNTY_CODE sy-vline 
WA_BCKNEX_STR-COUNTY sy-vline 
WA_BCKNEX_STR-TOWNSHIP_CODE sy-vline 
WA_BCKNEX_STR-TOWNSHIP sy-vline 
WA_BCKNEX_STR-DEFLT_COMM sy-vline 
WA_BCKNEX_STR-XPCPT sy-vline 
WA_BCKNEX_STR-TEL_NUMBER sy-vline 
WA_BCKNEX_STR-TEL_EXTENS sy-vline 
WA_BCKNEX_STR-FAX_NUMBER sy-vline 
WA_BCKNEX_STR-FAX_EXTENS sy-vline 
WA_BCKNEX_STR-EXP_CLA sy-vline 
WA_BCKNEX_STR-SELFLAG sy-vline 
WA_BCKNEX_STR-ICON_BLOCK sy-vline      INTO ld_text SEPARATED BY SPACE.

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