ABAP Select data from SAP table BAPI2106A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPI2106A 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 BAPI2106A. 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 BAPI2106A 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_BAPI2106A TYPE STANDARD TABLE OF BAPI2106A,
      WA_BAPI2106A TYPE BAPI2106A,
      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: <BAPI2106A> TYPE BAPI2106A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BAPI2106A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BAPI2106A
  INTO TABLE IT_BAPI2106A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI2106A
*  INTO TABLE @DATA(IT_BAPI2106A2).
*--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_BAPI2106A INDEX 1 INTO DATA(WA_BAPI2106A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BAPI2106A ASSIGNING <BAPI2106A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI2106A>-ADDI_SUPPLIER = 1.
<BAPI2106A>-CUSTOMER = 1.
<BAPI2106A>-APPLICATION = 1.
<BAPI2106A>-REF_DOC_ID = 1.
<BAPI2106A>-ITEM_NUMBER = 1.

ENDLOOP.

LOOP AT IT_BAPI2106A INTO WA_BAPI2106A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI2106A-SCHEDULE_NO, sy-vline,
  WA_BAPI2106A-ADDI_KEY, sy-vline,
  WA_BAPI2106A-ADDI_BUY_HEAD_NO, sy-vline,
  WA_BAPI2106A-ADDI_BUY_ITEM_NO, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_BAPI2106A 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_BAPI2106A 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_BAPI2106A INTO WA_BAPI2106A.


*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 ADDI_SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2106A-ADDI_SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2106A-ADDI_SUPPLIER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CUSTOMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2106A-CUSTOMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2106A-CUSTOMER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADDI_BUY_HEAD_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2106A-ADDI_BUY_HEAD_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2106A-ADDI_BUY_HEAD_NO.
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_BAPI2106A_STR, 
ADDI_SUPPLIER TYPE STRING,
CUSTOMER TYPE STRING,
APPLICATION TYPE STRING,
REF_DOC_ID TYPE STRING,
ITEM_NUMBER TYPE STRING,
SCHEDULE_NO TYPE STRING,
ADDI_KEY TYPE STRING,
ADDI_BUY_HEAD_NO TYPE STRING,
ADDI_BUY_ITEM_NO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI2106A_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_BAPI2106A_STR-ADDI_SUPPLIER sy-vline 
WA_BAPI2106A_STR-CUSTOMER sy-vline 
WA_BAPI2106A_STR-APPLICATION sy-vline 
WA_BAPI2106A_STR-REF_DOC_ID sy-vline 
WA_BAPI2106A_STR-ITEM_NUMBER sy-vline 
WA_BAPI2106A_STR-SCHEDULE_NO sy-vline 
WA_BAPI2106A_STR-ADDI_KEY sy-vline 
WA_BAPI2106A_STR-ADDI_BUY_HEAD_NO sy-vline 
WA_BAPI2106A_STR-ADDI_BUY_ITEM_NO sy-vline      INTO ld_text SEPARATED BY SPACE.

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