Comunica Explain Query Query Process Actor

An Query Process actor that explains the logical query plan as a query string after parsing and optimizing. If source selection took place, source assignment on operators will be serialized as SERVICE clauses.

This module is part of the Comunica framework, and should only be used by developers that want to build their own query engine.

Click here if you just want to query with Comunica.

Install

$ yarn add @comunica/actor-query-process-explain-query

Configure

After installing, this package can be added to your engine's configuration as follows:

{
  "@context": [
    ...
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-query-process-explain-query/^1.0.0/components/context.jsonld"
  ],
  "actors": [
    ...
    {
      "@id": "urn:comunica:default:query-process/actors#explain-query",
      "@type": "ActorQueryProcessExplainService",
      "mediatorQuerySerialize": { "@id": "urn:comunica:default:query-serialize/mediators#main" }
    }
  ]
}

Config Parameters

• mediatorQuerySerialize: A mediator over the Query Serialize bus.