[ 
https://issues.apache.org/jira/browse/RYA-303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16120011#comment-16120011
 ] 

ASF GitHub Bot commented on RYA-303:
------------------------------------

Github user meiercaleb commented on a diff in the pull request:

    https://github.com/apache/incubator-rya/pull/172#discussion_r132198496
  
    --- Diff: 
extras/rya.indexing.pcj/src/main/java/org/apache/rya/indexing/pcj/storage/mongo/MongoPcjDocuments.java
 ---
    @@ -0,0 +1,418 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
    + * with the License.  You may obtain a copy of the License at
    + *
    + *   http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing,
    + * software distributed under the License is distributed on an
    + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    + * KIND, either express or implied.  See the License for the
    + * specific language governing permissions and limitations
    + * under the License.
    + */
    +package org.apache.rya.indexing.pcj.storage.mongo;
    +
    +import static com.google.common.base.Preconditions.checkNotNull;
    +import static java.util.Objects.requireNonNull;
    +
    +import java.util.ArrayList;
    +import java.util.Collection;
    +import java.util.HashSet;
    +import java.util.Iterator;
    +import java.util.List;
    +import java.util.Set;
    +
    +import org.apache.accumulo.core.security.Authorizations;
    +import org.apache.rya.api.domain.RyaType;
    +import org.apache.rya.api.resolver.RdfToRyaConversions;
    +import org.apache.rya.api.resolver.RyaToRdfConversions;
    +import org.apache.rya.indexing.pcj.storage.PcjMetadata;
    +import 
org.apache.rya.indexing.pcj.storage.PrecomputedJoinStorage.CloseableIterator;
    +import 
org.apache.rya.indexing.pcj.storage.PrecomputedJoinStorage.PCJStorageException;
    +import org.apache.rya.indexing.pcj.storage.VisibilityBindingSet;
    +import org.apache.rya.indexing.pcj.storage.accumulo.VariableOrder;
    +import org.bson.Document;
    +import org.bson.conversions.Bson;
    +import org.openrdf.model.URI;
    +import org.openrdf.model.Value;
    +import org.openrdf.model.impl.URIImpl;
    +import org.openrdf.query.BindingSet;
    +import org.openrdf.query.MalformedQueryException;
    +import org.openrdf.query.QueryEvaluationException;
    +import org.openrdf.query.QueryLanguage;
    +import org.openrdf.query.TupleQuery;
    +import org.openrdf.query.TupleQueryResult;
    +import org.openrdf.query.impl.MapBindingSet;
    +import org.openrdf.repository.RepositoryConnection;
    +import org.openrdf.repository.RepositoryException;
    +
    +import com.mongodb.MongoClient;
    +import com.mongodb.client.FindIterable;
    +import com.mongodb.client.MongoCollection;
    +import com.mongodb.util.JSON;
    +
    +/**
    + * Creates and modifies PCJs in MongoDB. PCJ's are stored as follows:
    + *
    + * <pre>
    + * <code>
    + * ----- PCJ Metadata Doc -----
    + * {
    + *   _id: [table_name]_METADATA,
    + *   sparql: [sparql query to match results],
    + *   cardinality: [number of results]
    + * }
    + *
    + * ----- PCJ Results Doc -----
    + * {
    + *   pcjName: [table_name],
    + *   auths: [auths]
    + *   [binding_var1]: {
    + *     uri: [type_uri],
    + *     value: value
    + *   }
    + *   .
    + *   .
    + *   .
    + *   [binding_varn]: {
    --- End diff --
    
    binding_var2


> Mongo PCJ indexer support
> -------------------------
>
>                 Key: RYA-303
>                 URL: https://issues.apache.org/jira/browse/RYA-303
>             Project: Rya
>          Issue Type: Improvement
>            Reporter: Andrew Smith
>            Assignee: Andrew Smith
>




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