Lucene LongPoint 范围搜索不起作用

Question

我在 Java 11.

中使用 Lucene 8.2.0

我正在尝试索引一个 Long 值，以便我可以使用范围查询对其进行过滤，例如：+my_range_field:[1 TO 200]。但是，它的任何变体，甚至 my_range_field:[* TO *]、returns 0 都会导致这个最小示例。一旦我从中删除 + 使其成为 OR，我就会得到 2 结果。

所以我想我一定是在索引它的方式上犯了一个错误，但我不知道它可能是什么。

来自LongPoint JavaDoc:

An indexed long field for fast range filters. If you also need to store the value, you should add a separate StoredField instance. Finding all documents within an N-dimensional shape or range at search time is efficient. Multiple values for the same field in one document is allowed.

这是我的最小示例：

public static void main(String[] args) {
    Directory index = new RAMDirectory();
    StandardAnalyzer analyzer = new StandardAnalyzer();

    try {
        IndexWriter indexWriter = new IndexWriter(index, new IndexWriterConfig(analyzer));

        Document document1= new Document();
        Document document2= new Document();

        document1.add(new LongPoint("my_range_field", 10));
        document1.add(new StoredField("my_range_field", 10));
        document2.add(new LongPoint("my_range_field", 100));
        document2.add(new StoredField("my_range_field", 100));

        document1.add(new TextField("my_text_field", "test content 1", Field.Store.YES));
        document2.add(new TextField("my_text_field", "test content 2", Field.Store.YES));

        indexWriter.deleteAll();
        indexWriter.commit();
        indexWriter.addDocument(document1);
        indexWriter.addDocument(document2);
        indexWriter.commit();
        indexWriter.close();

        QueryParser parser = new QueryParser("text", analyzer);
        IndexSearcher indexSearcher = new IndexSearcher(DirectoryReader.open(index));

        String luceneQuery = "+my_text_field:test* +my_range_field:[1 TO 200]";
        Query query = parser.parse(luceneQuery);

        System.out.println(indexSearcher.search(query, 10).totalHits.value);
    } catch (IOException e) {

    } catch (ParseException e) {

    }
}

Answer 1

我找到了问题的解决方案。

我的印象是查询解析器可以正确解析任何查询字符串。好像不是这样。

正在使用

Query rangeQuery = LongPoint.newRangeQuery("my_range_field", 1L, 11L);
Query searchQuery = new WildcardQuery(new Term("my_text_field", "test*"));
Query build = new BooleanQuery.Builder()
    .add(searchQuery, BooleanClause.Occur.MUST)
    .add(rangeQuery, BooleanClause.Occur.MUST)
    .build();

返回了正确的结果。

Answer 2

您需要先使用 StandardQueryParser，然后为解析器提供一个 PointsConfig 映射，本质上是暗示哪些字段将被视为点。您现在将获得 2 个结果。

// Change this line to the following
StandardQueryParser parser = new StandardQueryParser(analyzer);
IndexSearcher indexSearcher = new IndexSearcher(DirectoryReader.open(dir));

/* Added code */
PointsConfig longConfig = new PointsConfig(new DecimalFormat(), Long.class);
Map<String, PointsConfig> pointsConfigMap = new HashMap<>();
pointsConfigMap.put("my_range_field", longConfig);
parser.setPointsConfigMap(pointsConfigMap);
/* End of added code */

String luceneQuery = "+my_text_field:test* +my_range_field:[1 TO 200]";
// Change the query to the following
Query query = parser.parse(luceneQuery, "text");

Lucene LongPoint 范围搜索不起作用

Lucene LongPoint Range search doesn't work

java

indexing

lucene

java-11

range-query