NAME

       RDF::Query::Plan::Service - Executable query plan for remote SPARQL queries.

VERSION

       This document describes RDF::Query::Plan::Service version 2.910.

METHODS

       Beyond the methods documented below, this class inherits methods from the RDF::Query::Plan
       class.

       "new ( $endpoint, $plan, $silent, $sparql, [ \%logging_keys ] )"
           Returns a new SERVICE (remote endpoint call) query plan object. "<$endpoint"> is the
           URL of the endpoint (as a node object). "<$plan"> is the query plan representing the
           query to be sent to the remote endpoint (needed for cost estimates). "<$sparql"> is
           the serialized SPARQL query to be sent to the remote endpoint. Finally, if present,
           "<%logging_keys"> is a HASH containing the keys to use in logging the execution of
           this plan. Valid HASH keys are:

            * bf - The bound/free string representing C<<$plan>>

       "new_from_plan ( $endpoint, $plan, $context )"
           Returns a new SERVICE query plan object. "<$endpoint"> is the URL of the endpoint (as
           a string). "<$plan"> is the query plan representing the query to be sent to the remote
           endpoint. The exact SPARQL serialization that will be used is obtained by getting the
           originating RDF::Query::Algebra object from "<$plan">, and serializing it (with the
           aid of the RDF::Query::ExecutionContext object "<$context">).

       "execute ( $execution_context )"
       "next"
       "close"
       "endpoint"
       "sparql"
           Returns the SPARQL query (as a string) that will be sent to the remote endpoint.

       "lhs"
       "silent"
           Returns a boolean value indicating whether the service plan will ignore errors.

       "pattern"
           Returns the query plan that will be used in the remote service call.

       "distinct"
           Returns true if the pattern is guaranteed to return distinct results.

       "ordered"
           Returns true if the pattern is guaranteed to return ordered results.

       "plan_node_name"
           Returns the string name of this plan node, suitable for use in serialization.

       "plan_prototype"
           Returns a list of scalar identifiers for the type of the content (children) nodes of
           this plan node. See RDF::Query::Plan for a list of the allowable identifiers.

       "plan_node_data"
           Returns the data for this plan node that corresponds to the values described by the
           signature returned by "plan_prototype".

       "graph ( $g )"
       "explain"
           Returns a string serialization of the query plan appropriate for display on the
           command line.

AUTHOR

        Gregory Todd Williams <gwilliams@cpan.org>