@jahed/sparql-engine/dist/operators/join/index-join.d.ts

SPARQL query engine for servers and web browsers.

import ExecutionContext from "../../engine/context/execution-context.ts";
import type { PipelineStage } from "../../engine/pipeline/pipeline-engine.ts";
import { Bindings } from "../../rdf/bindings.ts";
import Graph from "../../rdf/graph.ts";
import type { EngineTriple } from "../../types.ts";
/**
 * Perform a join between a source of solution bindings (left relation)
 * and a triple pattern (right relation) using the Index Nested Loop Join algorithm.
 * This algorithm is more efficient if the cardinality of the left relation is smaller
 * than the cardinality of the right one.
 * @param source - Left input (a {@link PipelineStage})
 * @param pattern - Triple pattern to join with (right relation)
 * @param graph   - RDF Graph on which the join is performed
 * @param context - Execution context
 * @return A {@link PipelineStage} which evaluate the join
 */
export default function indexJoin(source: PipelineStage<Bindings>, pattern: EngineTriple, graph: Graph, context: ExecutionContext): PipelineStage<Bindings>;