ABAP Select data from SAP table BWPOS_TRANSIENT_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWPOS_TRANSIENT_FIELDS
*  INTO TABLE @DATA(IT_BWPOS_TRANSIENT_FIELDS2).
*--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_BWPOS_TRANSIENT_FIELDS INDEX 1 INTO DATA(WA_BWPOS_TRANSIENT_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWPOS_TRANSIENT_FIELDS>-MANDT = 1.
<BWPOS_TRANSIENT_FIELDS>-LAUFD = 1.
<BWPOS_TRANSIENT_FIELDS>-LAUFI = 1.
<BWPOS_TRANSIENT_FIELDS>-UMBWM = 1.
<BWPOS_TRANSIENT_FIELDS>-ZBUKR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWPOS_TRANSIENT_FIELDS-GRUPPE, sy-vline,
  WA_BWPOS_TRANSIENT_FIELDS-KOART, sy-vline,
  WA_BWPOS_TRANSIENT_FIELDS-KUNNR, sy-vline,
  WA_BWPOS_TRANSIENT_FIELDS-LIFNR, sy-vline,
  WA_BWPOS_TRANSIENT_FIELDS-BUKRS, sy-vline,
  WA_BWPOS_TRANSIENT_FIELDS-BELNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWPOS_TRANSIENT_FIELDS 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_BWPOS_TRANSIENT_FIELDS 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_BWPOS_TRANSIENT_FIELDS INTO WA_BWPOS_TRANSIENT_FIELDS.


*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_BWPOS_TRANSIENT_FIELDS-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWPOS_TRANSIENT_FIELDS-KUNNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_BWPOS_TRANSIENT_FIELDS-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWPOS_TRANSIENT_FIELDS-GJAHR.
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_BWPOS_TRANSIENT_FIELDS_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
UMBWM TYPE STRING,
ZBUKR TYPE STRING,
GRUPPE TYPE STRING,
KOART TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
TAX_COUNTRY TYPE STRING,
TXDAT_FROM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWPOS_TRANSIENT_FIELDS_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_BWPOS_TRANSIENT_FIELDS_STR-MANDT sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-LAUFD sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-LAUFI sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-UMBWM sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-ZBUKR sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-GRUPPE sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-KOART sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-KUNNR sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-LIFNR sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-BUKRS sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-BELNR sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-GJAHR sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-BUZEI sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-TAX_COUNTRY sy-vline 
WA_BWPOS_TRANSIENT_FIELDS_STR-TXDAT_FROM sy-vline      INTO ld_text SEPARATED BY SPACE.

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