ABAP Select data from SAP table BAPIPCWWMI 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 BAPIPCWWMI 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 BAPIPCWWMI. 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 BAPIPCWWMI 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_BAPIPCWWMI TYPE STANDARD TABLE OF BAPIPCWWMI,
      WA_BAPIPCWWMI TYPE BAPIPCWWMI,
      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: <BAPIPCWWMI> TYPE BAPIPCWWMI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPIPCWWMI
*  INTO TABLE @DATA(IT_BAPIPCWWMI2).
*--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_BAPIPCWWMI INDEX 1 INTO DATA(WA_BAPIPCWWMI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPIPCWWMI>-FUNCTION = 1.
<BAPIPCWWMI>-PRODCAT = 1.
<BAPIPCWWMI>-ORGSYS = 1.
<BAPIPCWWMI>-CATEGORY = 1.
<BAPIPCWWMI>-PROMOTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPIPCWWMI-LAYOUT, sy-vline,
  WA_BAPIPCWWMI-UNIT_SHARES_ISO, sy-vline,
  WA_BAPIPCWWMI-UNIT_SHARES, sy-vline,
  WA_BAPIPCWWMI-HIERARCHY_IND, sy-vline,
  WA_BAPIPCWWMI-VALID_FROM, sy-vline,
  WA_BAPIPCWWMI-VALID_TO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPIPCWWMI 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_BAPIPCWWMI 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_BAPIPCWWMI INTO WA_BAPIPCWWMI.


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

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

*Conversion exit CUNIT, internal->external for field UNIT_SHARES
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPIPCWWMI-UNIT_SHARES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIPCWWMI-UNIT_SHARES.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REF_CUSTOMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPIPCWWMI-REF_CUSTOMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIPCWWMI-REF_CUSTOMER.
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_BAPIPCWWMI_STR, 
FUNCTION TYPE STRING,
PRODCAT TYPE STRING,
ORGSYS TYPE STRING,
CATEGORY TYPE STRING,
PROMOTION TYPE STRING,
LAYOUT TYPE STRING,
UNIT_SHARES_ISO TYPE STRING,
UNIT_SHARES TYPE STRING,
HIERARCHY_IND TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
DOC_SCHEME TYPE STRING,
REF_CUSTOMER TYPE STRING,
SALESORG TYPE STRING,
DISTR_CHAN TYPE STRING,
DIVISION TYPE STRING,
PRICE_DATE TYPE STRING,
CURRENCY_ISO TYPE STRING,
CURRENCY TYPE STRING,
PRICE_IND TYPE STRING,
AUTH_GROUP TYPE STRING,
PCTYPE TYPE STRING,
CATALOGCODE TYPE STRING,
DOC_SCHEME_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPIPCWWMI_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_BAPIPCWWMI_STR-FUNCTION sy-vline 
WA_BAPIPCWWMI_STR-PRODCAT sy-vline 
WA_BAPIPCWWMI_STR-ORGSYS sy-vline 
WA_BAPIPCWWMI_STR-CATEGORY sy-vline 
WA_BAPIPCWWMI_STR-PROMOTION sy-vline 
WA_BAPIPCWWMI_STR-LAYOUT sy-vline 
WA_BAPIPCWWMI_STR-UNIT_SHARES_ISO sy-vline 
WA_BAPIPCWWMI_STR-UNIT_SHARES sy-vline 
WA_BAPIPCWWMI_STR-HIERARCHY_IND sy-vline 
WA_BAPIPCWWMI_STR-VALID_FROM sy-vline 
WA_BAPIPCWWMI_STR-VALID_TO sy-vline 
WA_BAPIPCWWMI_STR-DOC_SCHEME sy-vline 
WA_BAPIPCWWMI_STR-REF_CUSTOMER sy-vline 
WA_BAPIPCWWMI_STR-SALESORG sy-vline 
WA_BAPIPCWWMI_STR-DISTR_CHAN sy-vline 
WA_BAPIPCWWMI_STR-DIVISION sy-vline 
WA_BAPIPCWWMI_STR-PRICE_DATE sy-vline 
WA_BAPIPCWWMI_STR-CURRENCY_ISO sy-vline 
WA_BAPIPCWWMI_STR-CURRENCY sy-vline 
WA_BAPIPCWWMI_STR-PRICE_IND sy-vline 
WA_BAPIPCWWMI_STR-AUTH_GROUP sy-vline 
WA_BAPIPCWWMI_STR-PCTYPE sy-vline 
WA_BAPIPCWWMI_STR-CATALOGCODE sy-vline 
WA_BAPIPCWWMI_STR-DOC_SCHEME_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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