NAME¶
RDF::Query::Plan::Service - Executable query plan for remote SPARQL queries.
VERSION¶
This document describes RDF::Query::Plan::Service version 2.908.
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>