FengFeng Cheng created LUCENE-10609:
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Summary: Phrase queries using SpanNearQuery highlight suspected
bugs.
Key: LUCENE-10609
URL: https://issues.apache.org/jira/browse/LUCENE-10609
Project: Lucene - Core
Issue Type: Bug
Components: modules/highlighter
Affects Versions: 8.0
Reporter: FengFeng Cheng
document: Blockchain technology 5G technology VR Technology AI Technology
analyzer: WhitespaceAnalyzer
query: spanNear([spanNear([title:Blockchain, title:technology], 0, true),
spanNear([title:VR, title:Technology], 0, true)], 2, true)
{code:java}
//query code
SpanQuery termQuery_sub01 = new SpanTermQuery(new Term("title", "Blockchain"));
SpanQuery termQuery_sub02 = new SpanTermQuery(new Term("title", "technology"));
SpanNearQuery spanNearQuery_Sub01 = new SpanNearQuery(new SpanQuery[] {
termQuery_sub01, termQuery_sub02 }, 0, true);
SpanQuery termQuery_sub03 = new SpanTermQuery(new Term("title", "VR"));
SpanQuery termQuery_sub04 = new SpanTermQuery(new Term("title", "Technology"));
SpanNearQuery spanNearQuery_Sub02 = new SpanNearQuery(new SpanQuery[] {
termQuery_sub03, termQuery_sub04 }, 0, true);
SpanNearQuery spanNearQuery = new SpanNearQuery(new SpanQuery[] {
spanNearQuery_Sub01, spanNearQuery_Sub02 }, 2, true); {code}
The query hits the document, but is there a problem with highlighting?
{code:java}
//highlight code
QueryScorer scorer = new QueryScorer(query);
SimpleHTMLFormatter simpleHtmlFormatter = new SimpleHTMLFormatter("[", "]");
Highlighter highlighter = new Highlighter(simpleHtmlFormatter, scorer);
highlighter.setTextFragmenter(new SimpleFragmenter(100)); {code}
highlight result
[Blockchain] [technology] 5G [technology] [VR] [Technology] AI Technology
I think "Blockchain Technology" and "VR Technology" should be highlighted, but
the "technology" in "5G Technology" should not be highlighted.
Uh, uh, UH, I'm not sure if it's a bug or if it's designed that way.
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