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Updating DB from i_tab


this is my problem:

I have a table on a web dynpro showing content of a db table: the cell editor is inputfield; when changing some value on the table in the view, the web dynpro automatically update the wd_this->elements_table and that's great, but how can I flag an entry of this table as modified so that when I save the table content on the db, I can save only row changed?

there is no problem adding a new field in context, but how can I recognize that a particular row has been changed (and its index in wd_this->elements_table) so that I can set the flag "modified" for that particular element?



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