DROP-VIEW — Drops a database view.
Function
nameThe name of the view as a string, symbol or SQL expression.
databaseA database object which defaults to *default-database*.
if-does-not-existA symbol. Meaningful values are :ignore or :error (the default).
Drops the view called name from
      database which defaults to
      *default-database*. If the view does not exist
      and if-does-not-exist is
      :ignore then drop-view
      returns NIL whereas an error is signalled if
      if-does-not-exist is
      :error.
      
(view-exists-p [foo])
=> T
(drop-view [foo] :if-does-not-exist :ignore)
=> 
(view-exists-p [foo])
=> NIL