apache - 语法错误，使用fq(过滤查询)时无法从lucene StandardQueryparser进行解析

我试图将Java字符串传递给Apache StandardQueryparser以获取Querynode。

输入-"fq=section:1"
我需要的只是QueryNode的FILTER子句中的section:1。这看起来很简单，但是会抛出
INVALID_SYNTAX_CANNOT_PARSE: Syntax Error, cannot parse fq=section:1:

最佳答案

使用a ConstantScoreQuery。它不会影响它的得分，而is the same was as the fq parameter is implemented in Solr:

  public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException {
    // SolrRequestInfo reqInfo = SolrRequestInfo.getRequestInfo();

    if (!(searcher instanceof SolrIndexSearcher)) {
      // delete-by-query won't have SolrIndexSearcher
      return new BoostQuery(new ConstantScoreQuery(q), 0).createWeight(searcher, scoreMode, 1f);
    }

    SolrIndexSearcher solrSearcher = (SolrIndexSearcher)searcher;
    DocSet docs = solrSearcher.getDocSet(q);
    // reqInfo.addCloseHook(docs);  // needed for off-heap refcounting

    return new BoostQuery(new SolrConstantScoreQuery(docs.getTopFilter()), 0).createWeight(searcher, scoreMode, 1f);
  }

关于apache - 语法错误，使用fq(过滤查询)时无法从lucene StandardQueryparser进行解析，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/59328945/