Hi, I am working on some big data related technology. And I am trying to get a sense on how hard will it be to enhance the views in impala so whenever someone query a view, not all the columns of that view are computed but only the necessary columns for that particular query.
A simple exemple will be: create view test_view_a as select coalesce(col1,col2) as testCol1, col3 from physical_table1 Then if I do a query like this: select col3 from test_view_a; The coalesce for testCol1 should not occur because not being used. thanks
