"db.view"A sub-class of '>db.data.frame which points to
tables in the database
Objects can be created by calls of db.data.frame or
as.db.data.frame
As a sub-class, this class has all the slots of
'>db.data.frame. Here we list the extra slots.
.key:Object of class "character". The name of the primary key
column name when the view is materialized. The view in the
database does not have a primary key. Currently only one
primary key column is
supported. This value can be set during the creation of the object
when using the function db.data.frame. The functions
key and key<- can be used to get and
set this value.
db.data.frame creates a db.data.frame object.
as.db.data.frame converts db.Rquery object,
data.frame, or a data file into a db.data.frame object
and at the same time creates a new table in the database.
'>db.data.frame is the superclass.
'>db.table is the other subclass of
'>db.data.frame