The LeftJoin type exposes the following members.
Gets the Filter that applies across the Join.
Gets the enumeration of fixed variables in the algebra i.e. variables that are guaranteed to have a bound value.
Gets the enumeration of floating variables in the algebra i.e. variables that are not guaranteed to have a bound value.
Gets the LHS of the Join.
Gets the RHS of the Join.
Gets the Variables used in the Algebra.