NAME

RDF::Query::Optimizer::Peephole::Naive - Peephole optimizer for re-ordering triple patterns.

METHODS

new ( $query, $model, %args )

Returns a new optimizer object.

optimize_triplepattern ( $pattern )

Recursively performs optimization on the supplied triple $pattern. Re-orders the triple patterns in $pattern and returns the computed cost of the pattern.

statement_cost ( $statement )

Returns the computed cost of querying the triple store for the supplied $statement.

variable_cost

Returns the partial cost of querying the triple store for a statement containing a variable.

resource_cost

Returns the partial cost of querying the triple store for a statement containing a resource.

literal_cost

Returns the partial cost of querying the triple store for a statement containing a literal.

blank_cost

Returns the partial cost of querying the triple store for a statement containing a blank node.

AUTHOR

 Gregory Williams <gwilliams@cpan.org>