SEQUENCE-EXISTS-P — Tests for the existence of a database sequence.
Function
nameThe name of the sequence as a string, symbol or SQL expression.
owner
              A string, NIL or :all. 
            
databaseA database object which defaults to *default-database*.
resultA Boolean.
Tests for the existence of an SQL sequence called
      name in database
      which defaults to
      *default-database*. owner
      is NIL by default which means that only sequences owned by
      users are examined. If owner is a string
      denoting a user name, only sequences owned by
      owner are examined. If
      owner is :all then all
      sequences are examined.