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redingerredinger
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QueryRequest examples with different shapes
1 parent 27c98fd commit 455820b

2 files changed

Lines changed: 45 additions & 5 deletions

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‎pom.xml‎

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Original file line numberDiff line numberDiff line change
@@ -4,7 +4,7 @@
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<dependencies>
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<dependency>
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<groupId>com.datomic</groupId>
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<artifactId>datomic-free</artifactId>
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<artifactId>datomic-pro</artifactId>
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<version>0.9.5153</version>
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<exclusions>
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<exclusion>

‎src/java/datomic/samples/Query.java‎

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Original file line numberDiff line numberDiff line change
@@ -2,6 +2,7 @@
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import datomic.*;
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import java.util.List;
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import java.util.Scanner;
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import java.util.Collection;
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@@ -414,17 +415,56 @@ public static void main(String[] args) {
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System.out.println(results);
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pause();
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System.out.println("Building a QueryRequest.");
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QueryRequest queryRequest = QueryRequest.create("[:find ?release-name " +
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System.out.println("Using a QueryRequest to return a relation");
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QueryRequest queryRequest = QueryRequest.create("[:find ?artist-name ?release-name " +
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" :in $ ?artist-name " +
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" :where [?artist :artist/name ?artist-name] " +
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" [?release :release/artists ?artist] " +
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" [?release :release/name ?release-name]]",
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db, "John Lennon");
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results = Peer.query(queryRequest);
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System.out.println(results);
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Collection<List<String>> queryResultRelation = Peer.query(queryRequest);
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System.out.println(queryResultRelation);
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pause();
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System.out.println("Using a QueryRequest to return a collection");
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queryRequest = QueryRequest.create("[:find [?release-name ...]" +
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" :in $ ?artist-name " +
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" :where [?artist :artist/name ?artist-name] " +
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" [?release :release/artists ?artist] " +
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" [?release :release/name ?release-name]]",
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db, "John Lennon");
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Collection<String> queryResultCollection = Peer.query(queryRequest);
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System.out.println(queryResultCollection);
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pause();
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System.out.println("Using a QueryRequest to return a single tuple");
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queryRequest = QueryRequest.create("[:find [?year ?month ?day]" +
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" :in $ ?name" +
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" :where [?artist :artist/name ?name] " +
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" [?artist :artist/startDay ?day] " +
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" [?artist :artist/startMonth ?month] " +
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" [?artist :artist/startYear ?year]]",
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db, "John Lennon");
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List<Long> queryResultSingleTuple = Peer.query(queryRequest);
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System.out.println(queryResultSingleTuple);
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pause();
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System.out.println("Using a QueryRequest to return a single scalar");
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queryRequest = QueryRequest.create("[:find ?year . " +
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" :in $ ?name " +
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" :where [?artist :artist/name ?name] " +
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" [?artist :artist/startYear ?year]]",
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db, "John Lennon");
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Long queryResultSingleScalar = Peer.query(queryRequest);
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System.out.println(queryResultSingleScalar);
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pause();
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System.out.println("Timeout a long running query.");
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queryRequest = QueryRequest.create("[:find ?track-name " +
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" :in $ ?artist-name " +

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