Answer / sivaprasad.th

BDCDATA standard structure contains following parameters.

program :name of the module pool programm.
dynpro :screen number
dynbegin:it indicates for the new screen
fnam :name of the fields in database
fval :fields values are assinged with the fields

by defineing that structure bdcdata as it_bdcdata and work
area wa_bdcdata and we can pass above values.

ex: wa_bdcdata-program = name of the module pool program.

and

BDCMSGCOLL this is the structure to keep the errors while we
are using call transaction method in bdc.

ex syntax:

call transaction 'va01' using it_bdcdata mode a/n/e update
s/a messages into it_bdcmsgcoll.


correct me if i am wrong.

Answer / franklin

BDCDATA is a structure which contains 5 fields such as
program name,screen number,initial screen,name of the
fields in each screen and finally value for each field.

BDCDATA structure is used for creating internal table and
work area which is very much useful while we are creting
sessions and using call transaction method for uploading
and downloading form presentation server to application
server.

BDCMSGCOLL is a structure which contain error log and
messages which is created while we are invoking call
transaction method.

We can use call function FORMAT_MESSAGE to print all the
error messages which is stored in BDCMSGCOLL structure.

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