Neo4j批量插入器

Question

我的批量插入器出现了奇怪的问题。批量插入器工作正常，但是当我从该位置启动服务器时，CYPHER无法对属性进行过滤。

查询"match(a) return a"返回所有节点。但是，当我尝试根据任何属性过滤它时，它不会返回任何行。查询match(a) where a.Name="Someone" return a不会返回任何内容。

如果我运行运行SET命令来更新属性，那么我可以很好地过滤它。看起来像索引问题，但无法弄清楚。

**Output of - `match(a) return a` -** 

╒══════════════════════════════╕
│a                             │
╞══════════════════════════════╡
│{}                            │
├──────────────────────────────┤

│{Company: "Neo Technology", ye│
│ar: 2013, Name: "Kenny Bastani│
│"}                            │
├──────────────────────────────┤
│{Company: "Neo Technology", ye│
│ar: 2010, Name: "Michael Hunge│
│r"}                           │
├──────────────────────────────┤
│{Company: "Heroku", year: 2011│
│, Name: "James Ward"}         │
├──────────────────────────────┤
│{Name: "Someone"}             │
├──────────────────────────────┤
│{Company: "Doe.com", year: "ni│
│netynine", Name: "John"}      │
└──────

**File -** 

    Name,Company,year

    "Kenny Bastani","Neo Technology",2013

     "Michael Hunger","Neo Technology",2010

     "James Ward","Heroku",2011

     "Someone",,

     "John","Doe.com","ninetynine"

**Batch Inserter-** 

    public void importNodes() throws IOException {
            FileInputStream fis = new FileInputStream(
                    "E:\\neo4j\\CSV_Import\\01.csv");
            InputStreamReader isr = new InputStreamReader(fis);
            BufferedReader br = new BufferedReader(isr);
            String line = null;

            File storeDir = new File("E:\\neo4j\\test_data1");
            FileUtils.deleteRecursively(storeDir);


            BatchInserter neoBatchInserter = BatchInserters.inserter(storeDir);

            Map properties = new HashMap();
            ArrayList headerMap = new ArrayList();

            BatchInserterIndexProvider indexProvider = new LuceneBatchInserterIndexProvider(
                    neoBatchInserter);

            BatchInserterIndex autoIndex = indexProvider.nodeIndex("node_auto_index",
                    MapUtil.stringMap("type", "exact"));

            autoIndex.setCacheCapacity( "Name", 10000 );

            neoBatchInserter.createDeferredSchemaIndex(Labels.Person).on("Name").create();

            String propertyName = "";

            boolean headerFlag = true;

            int counter = 0;

            while ((line = br.readLine()) != null) {

                String[] values = line.split(",");

                for (String value : values) {

                    if (headerFlag) {

                        headerMap.add(value);

                    } else {

                        propertyName = headerMap.get(counter);
                        properties.put(propertyName, value);

                    }

                    counter++;
                }

                System.out.println("New Node - " + properties);
                long node = neoBatchInserter.createNode(properties, Labels.Person);
                autoIndex.add(node, properties);
                autoIndex.flush();

                counter = 0;
                properties.clear();
                headerFlag = false;

            }

            indexProvider.shutdown();
            neoBatchInserter.shutdown();
        }

Answer 1

如果是索引问题，删除并重新创建索引可能会修复它。