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| Original file line number | Diff line number | Diff line change |
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| package com.the_qa_company.qendpoint; | ||
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| import com.the_qa_company.qendpoint.compiler.CompiledSail; | ||
| import com.the_qa_company.qendpoint.compiler.SparqlRepository; | ||
| import com.the_qa_company.qendpoint.core.hdt.HDT; | ||
| import com.the_qa_company.qendpoint.core.hdt.HDTManager; | ||
| import com.the_qa_company.qendpoint.core.options.HDTOptions; | ||
| import com.the_qa_company.qendpoint.core.options.HDTOptionsKeys; | ||
| import com.the_qa_company.qendpoint.core.triples.TripleString; | ||
| import com.the_qa_company.qendpoint.store.EndpointFiles; | ||
| import com.the_qa_company.qendpoint.store.Utility; | ||
| import org.apache.commons.lang3.time.StopWatch; | ||
| import org.eclipse.rdf4j.model.Statement; | ||
| import org.eclipse.rdf4j.query.TupleQuery; | ||
| import org.eclipse.rdf4j.query.TupleQueryResult; | ||
| import org.eclipse.rdf4j.query.explanation.Explanation; | ||
| import org.eclipse.rdf4j.repository.sail.SailRepositoryConnection; | ||
| import org.junit.After; | ||
| import org.junit.Before; | ||
| import org.junit.*; | ||
| import org.junit.rules.TemporaryFolder; | ||
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| import java.io.BufferedInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.util.Iterator; | ||
| import java.util.Objects; | ||
| import java.util.stream.Stream; | ||
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| public class TempTest { | ||
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| @Rule | ||
| public TemporaryFolder tempDir = TemporaryFolder.builder().assureDeletion().build(); | ||
| private SparqlRepository repository; | ||
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| @Before | ||
| public void setupRepo() throws IOException { | ||
| Path root = tempDir.newFolder().toPath(); | ||
| ClassLoader loader = getClass().getClassLoader(); | ||
| String filename = "2018_complete.nt"; | ||
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| Path hdtstore = root.resolve("hdt-store"); | ||
| Path locationNative = root.resolve("native"); | ||
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| Files.createDirectories(hdtstore); | ||
| Files.createDirectories(locationNative); | ||
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| String indexName = "index.hdt"; | ||
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| HDTOptions options = HDTOptions.of( | ||
| // disable the default index (to use the custom indexes) | ||
| HDTOptionsKeys.BITMAPTRIPLES_INDEX_NO_FOQ, true, | ||
| // set the custom indexes we want | ||
| HDTOptionsKeys.BITMAPTRIPLES_INDEX_OTHERS, "sop,ops,osp,pso,pos"); | ||
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| try (HDT hdt = HDTManager.generateHDT(new Iterator<>() { | ||
| @Override | ||
| public boolean hasNext() { | ||
| return false; | ||
| } | ||
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| @Override | ||
| public TripleString next() { | ||
| return null; | ||
| } | ||
| }, Utility.EXAMPLE_NAMESPACE, options, null)) { | ||
| hdt.saveToHDT(hdtstore.resolve(indexName).toAbsolutePath().toString(), null); | ||
| } catch (Error | RuntimeException e) { | ||
| throw e; | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
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| repository = CompiledSail.compiler().withEndpointFiles(new EndpointFiles(locationNative, hdtstore, indexName)) | ||
| .compileToSparqlRepository(); | ||
| try (InputStream is = new BufferedInputStream(Objects.requireNonNull(loader.getResourceAsStream(filename), | ||
| filename + " doesn't exist"))) { | ||
| repository.loadFile(is, filename); | ||
| } | ||
| } | ||
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| @After | ||
| public void after() { | ||
| if (repository != null) { | ||
| repository.shutDown(); | ||
| } | ||
| repository = null; | ||
| } | ||
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| @Test | ||
| public void test() { | ||
| try (SailRepositoryConnection connection = repository.getConnection()) { | ||
| System.out.println(); | ||
| String query = """ | ||
| PREFIX epo: <http://data.europa.eu/a4g/ontology#> | ||
| PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> | ||
| PREFIX legal: <https://www.w3.org/ns/legal#> | ||
| PREFIX dcterms: <http://purl.org/dc/terms#> | ||
| PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> | ||
| PREFIX dc: <http://purl.org/dc/elements/1.1/> | ||
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| SELECT DISTINCT ?countryID ?year (COUNT(DISTINCT ?lot) AS ?amountLots) (SUM(if(?bidders = 1, 1, 0)) AS ?numSingleBidders) WHERE { | ||
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| ?proc a epo:Procedure . | ||
| ?proc epo:hasProcedureType ?p . | ||
| ?proc epo:hasProcurementScopeDividedIntoLot ?lot . | ||
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| ?stat epo:concernsSubmissionsForLot ?lot . | ||
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| ?stat a epo:SubmissionStatisticalInformation . | ||
| ?stat epo:hasReceivedTenders ?bidders . | ||
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| ?resultnotice epo:refersToProcedure ?proc . | ||
| ?resultnotice a epo:ResultNotice . | ||
| ?resultnotice epo:hasDispatchDate ?ddate . | ||
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| FILTER ( ?p != <http://publications.europa.eu/resource/authority/procurement-procedure-type/neg-wo-call>) | ||
| BIND(year(xsd:dateTime(?ddate)) AS ?year) . | ||
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| # This line should be above the FILTER and BIND, but doing so causes the QueryJoinOptimizer to not optimize the query for some unknown reason | ||
| ?resultnotice epo:refersToRole ?buyerrole . | ||
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There was a problem hiding this comment. This line should be above the FILTER and BIND. When I put it above then the QueryJoinOptimizer doesn't manage to optimize the query at all. When I move it back down again like I've done now then it does end up triggering the QueryJoinOptimizer seemingly correctly, but it only seems to check the cardinality of this single statement pattern here and when it does it gets 0.0 as the cardinality. If you run the test you should see the following printed: There was a problem hiding this comment. I had a look at the QueryJoinOptimizer code and it doesn't seem to recurse down into the query tree. Essentially it will recurse down to the first There was a problem hiding this comment. I fixed the QueryJoinOptimizer eclipse-rdf4j/rdf4j#4879 |
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| { | ||
| SELECT DISTINCT ?buyerrole ?countryID WHERE { | ||
| ?org epo:hasBuyerType ?buytype . | ||
| FILTER (?buytype != <http://publications.europa.eu/resource/authority/buyer-legal-type/eu-int-org> ) | ||
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| ?buyerrole epo:playedBy ?org . | ||
| ?org legal:registeredAddress ?orgaddress . | ||
| ?orgaddress epo:hasCountryCode ?countrycode . | ||
| ?countrycode dc:identifier ?countryID . | ||
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| } | ||
| } | ||
| } GROUP BY ?countryID ?year | ||
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| """; | ||
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| System.out.println(query); | ||
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| Explanation explanation = runQuery(connection, query); | ||
| System.out.println(); | ||
| System.out.println(); | ||
| System.out.println(); | ||
| System.out.println(); | ||
| System.out.println(explanation.toDot()); | ||
| System.out.println(); | ||
| System.out.println(); | ||
| System.out.println(); | ||
| System.out.println(); | ||
| System.out.println(explanation); | ||
| System.out.println(); | ||
| System.out.println(); | ||
| System.out.println(); | ||
| System.out.println(); | ||
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| } | ||
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| } | ||
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| private static Explanation runQuery(SailRepositoryConnection connection, String query) { | ||
| StopWatch stopWatch = StopWatch.createStarted(); | ||
| { | ||
| TupleQuery tupleQuery = connection.prepareTupleQuery(query); | ||
| try (TupleQueryResult evaluate = tupleQuery.evaluate()) { | ||
| long count = evaluate.stream().count(); | ||
| System.out.println(count); | ||
| } | ||
| } | ||
| TupleQuery tupleQuery = connection.prepareTupleQuery(query); | ||
| tupleQuery.setMaxExecutionTime(60*10); | ||
| Explanation explain = tupleQuery.explain(Explanation.Level.Timed); | ||
| // System.out.println(explain); | ||
| // System.out.println(); | ||
| System.out.println("Took: " + stopWatch.formatTime()); | ||
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| return explain; | ||
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| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,123 @@ | ||
| Distinct (resultSizeActual=0, totalTimeActual=5.0s, selfTimeActual=0.001ms) | ||
| Projection (resultSizeActual=0, totalTimeActual=5.0s, selfTimeActual=0.0ms) | ||
| ├── ProjectionElemList | ||
| │ ProjectionElem "countryID" | ||
| │ ProjectionElem "year" | ||
| │ ProjectionElem "amountLots" | ||
| │ ProjectionElem "numSingleBidders" | ||
| └── Extension (resultSizeActual=0, totalTimeActual=5.0s) | ||
| Group (countryID, year) (resultSizeActual=0, totalTimeActual=5.0s, selfTimeActual=2.45ms) | ||
| Join (HashJoinIteration) (resultSizeActual=0, totalTimeActual=5.0s, selfTimeActual=0.015ms) | ||
| ╠══ Extension (resultSizeActual=1, totalTimeActual=5.0s, selfTimeActual=1.47ms) [left] | ||
| ║ ├── Join (JoinIterator) (resultSizeActual=1, totalTimeActual=5.0s, selfTimeActual=0.041ms) | ||
| ║ │ ╠══ Join (JoinIterator) (resultSizeActual=1, totalTimeActual=5.0s, selfTimeActual=0.088ms) [left] | ||
| ║ │ ║ ├── Join (JoinIterator) (resultSizeActual=19, totalTimeActual=5.0s, selfTimeActual=0.117ms) [left] | ||
| ║ │ ║ │ ╠══ Join (JoinIterator) (resultSizeActual=19, totalTimeActual=5.0s, selfTimeActual=0.096ms) [left] | ||
| ║ │ ║ │ ║ ├── Join (JoinIterator) (resultSizeActual=19, totalTimeActual=5.0s, selfTimeActual=1.9s) [left] | ||
| ║ │ ║ │ ║ │ ╠══ Join (JoinIterator) (resultSizeActual=1.9M, totalTimeActual=1.8s, selfTimeActual=144ms) [left] | ||
| ║ │ ║ │ ║ │ ║ ├── Join (JoinIterator) (resultSizeActual=19, totalTimeActual=2.24ms, selfTimeActual=0.129ms) [left] | ||
| ║ │ ║ │ ║ │ ║ │ ╠══ Join (JoinIterator) (resultSizeActual=8, totalTimeActual=1.84ms, selfTimeActual=0.473ms) [left] | ||
| ║ │ ║ │ ║ │ ║ │ ║ ├── Join (JoinIterator) (resultSizeActual=10, totalTimeActual=0.45ms, selfTimeActual=0.203ms) [left] | ||
| ║ │ ║ │ ║ │ ║ │ ║ │ ╠══ StatementPattern [index: SPO] (resultSizeActual=1, totalTimeActual=0.106ms, selfTimeActual=0.106ms) [left] | ||
| ║ │ ║ │ ║ │ ║ │ ║ │ ║ s: Var (name=resultnotice) | ||
| ║ │ ║ │ ║ │ ║ │ ║ │ ║ p: Var (name=_const_6aa9a9c_uri, value=http://data.europa.eu/a4g/ontology#refersToRole, anonymous) | ||
| ║ │ ║ │ ║ │ ║ │ ║ │ ║ o: Var (name=buyerrole) | ||
| ║ │ ║ │ ║ │ ║ │ ║ │ ╚══ StatementPattern [index: SPO] (resultSizeActual=10, totalTimeActual=0.141ms, selfTimeActual=0.141ms) [right] | ||
| ║ │ ║ │ ║ │ ║ │ ║ │ s: Var (name=proc) | ||
| ║ │ ║ │ ║ │ ║ │ ║ │ p: Var (name=_const_f5e5585a_uri, value=http://www.w3.org/1999/02/22-rdf-syntax-ns#type, anonymous) | ||
| ║ │ ║ │ ║ │ ║ │ ║ │ o: Var (name=_const_be18ee7b_uri, value=http://data.europa.eu/a4g/ontology#Procedure, anonymous) | ||
| ║ │ ║ │ ║ │ ║ │ ║ └── Filter (resultSizeActual=8, totalTimeActual=0.918ms, selfTimeActual=0.727ms) [right] | ||
| ║ │ ║ │ ║ │ ║ │ ║ ╠══ Compare (!=) | ||
| ║ │ ║ │ ║ │ ║ │ ║ ║ Var (name=p) | ||
| ║ │ ║ │ ║ │ ║ │ ║ ║ ValueConstant (value=http://publications.europa.eu/resource/authority/procurement-procedure-type/neg-wo-call) | ||
| ║ │ ║ │ ║ │ ║ │ ║ ╚══ StatementPattern [index: SPO] (resultSizeActual=9, totalTimeActual=0.191ms, selfTimeActual=0.191ms) | ||
| ║ │ ║ │ ║ │ ║ │ ║ s: Var (name=proc) | ||
| ║ │ ║ │ ║ │ ║ │ ║ p: Var (name=_const_9c756f6b_uri, value=http://data.europa.eu/a4g/ontology#hasProcedureType, anonymous) | ||
| ║ │ ║ │ ║ │ ║ │ ║ o: Var (name=p) | ||
| ║ │ ║ │ ║ │ ║ │ ╚══ StatementPattern [index: SPO] (resultSizeActual=19, totalTimeActual=0.268ms, selfTimeActual=0.268ms) [right] | ||
| ║ │ ║ │ ║ │ ║ │ s: Var (name=proc) | ||
| ║ │ ║ │ ║ │ ║ │ p: Var (name=_const_9c3f1eec_uri, value=http://data.europa.eu/a4g/ontology#hasProcurementScopeDividedIntoLot, anonymous) | ||
| ║ │ ║ │ ║ │ ║ │ o: Var (name=lot) | ||
| ║ │ ║ │ ║ │ ║ └── StatementPattern [index: SPO] (resultSizeActual=1.9M, totalTimeActual=1.6s, selfTimeActual=1.6s) [right] | ||
| ║ │ ║ │ ║ │ ║ s: Var (name=stat) | ||
| ║ │ ║ │ ║ │ ║ p: Var (name=_const_f5e5585a_uri, value=http://www.w3.org/1999/02/22-rdf-syntax-ns#type, anonymous) | ||
| ║ │ ║ │ ║ │ ║ o: Var (name=_const_ea79e75_uri, value=http://data.europa.eu/a4g/ontology#SubmissionStatisticalInformation, anonymous) | ||
| ║ │ ║ │ ║ │ ╚══ StatementPattern [index: SPO] (resultSizeActual=19, totalTimeActual=1.2s, selfTimeActual=1.2s) [right] | ||
| ║ │ ║ │ ║ │ s: Var (name=stat) | ||
| ║ │ ║ │ ║ │ p: Var (name=_const_25686184_uri, value=http://data.europa.eu/a4g/ontology#concernsSubmissionsForLot, anonymous) | ||
| ║ │ ║ │ ║ │ o: Var (name=lot) | ||
| ║ │ ║ │ ║ └── StatementPattern [index: SPO] (resultSizeActual=19, totalTimeActual=0.242ms, selfTimeActual=0.242ms) [right] | ||
| ║ │ ║ │ ║ s: Var (name=stat) | ||
| ║ │ ║ │ ║ p: Var (name=_const_98c73a3c_uri, value=http://data.europa.eu/a4g/ontology#hasReceivedTenders, anonymous) | ||
| ║ │ ║ │ ║ o: Var (name=bidders) | ||
| ║ │ ║ │ ╚══ StatementPattern [index: SPO] (resultSizeActual=19, totalTimeActual=0.205ms, selfTimeActual=0.205ms) [right] | ||
| ║ │ ║ │ s: Var (name=resultnotice) | ||
| ║ │ ║ │ p: Var (name=_const_f5e5585a_uri, value=http://www.w3.org/1999/02/22-rdf-syntax-ns#type, anonymous) | ||
| ║ │ ║ │ o: Var (name=_const_77e914ad_uri, value=http://data.europa.eu/a4g/ontology#ResultNotice, anonymous) | ||
| ║ │ ║ └── StatementPattern [index: SPO] (resultSizeActual=1, totalTimeActual=0.068ms, selfTimeActual=0.068ms) [right] | ||
| ║ │ ║ s: Var (name=resultnotice) | ||
| ║ │ ║ p: Var (name=_const_183bd06d_uri, value=http://data.europa.eu/a4g/ontology#refersToProcedure, anonymous) | ||
| ║ │ ║ o: Var (name=proc) | ||
| ║ │ ╚══ StatementPattern [index: SPO] (resultSizeActual=1, totalTimeActual=0.061ms, selfTimeActual=0.061ms) [right] | ||
| ║ │ s: Var (name=resultnotice) | ||
| ║ │ p: Var (name=_const_1b0b00ca_uri, value=http://data.europa.eu/a4g/ontology#hasDispatchDate, anonymous) | ||
| ║ │ o: Var (name=ddate) | ||
| ║ └── ExtensionElem (year) | ||
| ║ FunctionCall (http://www.w3.org/2005/xpath-functions#year-from-dateTime) | ||
| ║ FunctionCall (http://www.w3.org/2001/XMLSchema#dateTime) | ||
| ║ Var (name=ddate) | ||
| ╚══ Distinct (new scope) (resultSizeActual=1, totalTimeActual=1.02ms, selfTimeActual=0.655ms) [right] | ||
| Projection (resultSizeActual=1, totalTimeActual=0.365ms, selfTimeActual=0.025ms) | ||
| ╠══ ProjectionElemList | ||
| ║ ProjectionElem "buyerrole" | ||
| ║ ProjectionElem "countryID" | ||
| ╚══ Join (JoinIterator) (resultSizeActual=1, totalTimeActual=0.34ms, selfTimeActual=0.083ms) | ||
| ├── Join (JoinIterator) (resultSizeActual=1, totalTimeActual=0.227ms, selfTimeActual=0.026ms) [left] | ||
| │ ╠══ Join (JoinIterator) (resultSizeActual=1, totalTimeActual=0.179ms, selfTimeActual=0.064ms) [left] | ||
| │ ║ ├── Join (JoinIterator) (resultSizeActual=1, totalTimeActual=0.074ms, selfTimeActual=0.047ms) [left] | ||
| │ ║ │ ╠══ StatementPattern [index: SPO] (resultSizeActual=1, totalTimeActual=0.011ms, selfTimeActual=0.011ms) [left] | ||
| │ ║ │ ║ s: Var (name=buyerrole) | ||
| │ ║ │ ║ p: Var (name=_const_beb855c2_uri, value=http://data.europa.eu/a4g/ontology#playedBy, anonymous) | ||
| │ ║ │ ║ o: Var (name=org) | ||
| │ ║ │ ╚══ StatementPattern [index: SPO] (resultSizeActual=1, totalTimeActual=0.016ms, selfTimeActual=0.016ms) [right] | ||
| │ ║ │ s: Var (name=org) | ||
| │ ║ │ p: Var (name=_const_beb18915_uri, value=https://www.w3.org/ns/legal#registeredAddress, anonymous) | ||
| │ ║ │ o: Var (name=orgaddress) | ||
| │ ║ └── StatementPattern [index: SPO] (resultSizeActual=1, totalTimeActual=0.041ms, selfTimeActual=0.041ms) [right] | ||
| │ ║ s: Var (name=orgaddress) | ||
| │ ║ p: Var (name=_const_2f7de0e1_uri, value=http://data.europa.eu/a4g/ontology#hasCountryCode, anonymous) | ||
| │ ║ o: Var (name=countrycode) | ||
| │ ╚══ StatementPattern [index: SPO] (resultSizeActual=1, totalTimeActual=0.022ms, selfTimeActual=0.022ms) [right] | ||
| │ s: Var (name=countrycode) | ||
| │ p: Var (name=_const_a825a5f4_uri, value=http://purl.org/dc/elements/1.1/identifier, anonymous) | ||
| │ o: Var (name=countryID) | ||
| └── Filter (resultSizeActual=1, totalTimeActual=0.03ms, selfTimeActual=0.009ms) [right] | ||
| ╠══ Compare (!=) | ||
| ║ Var (name=buytype) | ||
| ║ ValueConstant (value=http://publications.europa.eu/resource/authority/buyer-legal-type/eu-int-org) | ||
| ╚══ StatementPattern [index: SPO] (resultSizeActual=1, totalTimeActual=0.022ms, selfTimeActual=0.022ms) | ||
| s: Var (name=org) | ||
| p: Var (name=_const_1abd8d4b_uri, value=http://data.europa.eu/a4g/ontology#hasBuyerType, anonymous) | ||
| o: Var (name=buytype) | ||
| GroupElem (amountLots) | ||
| Count (Distinct) | ||
| Var (name=lot) | ||
| GroupElem (numSingleBidders) | ||
| Sum | ||
| If | ||
| Compare (=) | ||
| Var (name=bidders) | ||
| ValueConstant (value="1"^^<http://www.w3.org/2001/XMLSchema#integer>) | ||
| ValueConstant (value="1"^^<http://www.w3.org/2001/XMLSchema#integer>) | ||
| ValueConstant (value="0"^^<http://www.w3.org/2001/XMLSchema#integer>) | ||
| ExtensionElem (amountLots) | ||
| Count (Distinct) | ||
| Var (name=lot) | ||
| ExtensionElem (numSingleBidders) | ||
| Sum | ||
| If | ||
| Compare (=) | ||
| Var (name=bidders) | ||
| ValueConstant (value="1"^^<http://www.w3.org/2001/XMLSchema#integer>) | ||
| ValueConstant (value="1"^^<http://www.w3.org/2001/XMLSchema#integer>) | ||
| ValueConstant (value="0"^^<http://www.w3.org/2001/XMLSchema#integer>) |
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@ate47 I'm using this code to set up a repo with the file from #413
The query statistics seems to always be returning 0. Do you know why?
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Can you detail this a bit more. I loaded the dataset and I was querying one triple pattern and I see that the cardinality is non zero:
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Try adding a break point on that line and then debugging the TempTest test() I added.
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Don't forget to add the file with the data to this path:
qendpoint-store/src/test/resources/2018_complete.ntThere was a problem hiding this comment.
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It's a race condition because a merge was triggered in the middle of the file loading
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Do you know how I can wait for the merge to complete?
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Btw. In my PR eclipse-rdf4j/rdf4j#4879 I managed to get the QueryJoinOptimizer to work better when the statistics are inaccurately returning 0.0 by adding 5.0 to the cost of all operations and also penalising cartesian joins more heavily.