[LUCENE-8495] ComplexPhraseQuery.rewrite throws "Unknown query type:org.apache.lucene.search.SynonymQuery" when nested BooleanQuery contains a SynonymQuery

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 7.4, 8.0
• Component/s: core/queryparser
• Lucene Fields: New, Patch Available
• Assignee: Unassigned
• Reporter: Bjarke Mortensen
• Created: 11/Sep/18 19:48
• Updated: 28/Aug/22 15:35

Description

When using nested queries in ComplexPhrases, and a part of the query is a SynonymQuery, an exception is thrown from  addComplexPhraseClause:

throw new IllegalArgumentException("Unknown query type:"
{{ + childQuery.getClass().getName());}}

Examples (dogs and tv are synonyms):

"(cats OR dogs) cigar"

"platform* (video* OR tv)"~10

The bug is similar in nature to LUCENE-8305, in that SynonymQuery support was added to ComplexPhraseQueryParser (in LUCENE-7695), but was not expanded to nested queries.

The fix is similar to the one in LUCENE-8305, namely to add the same logic in addComplexPhraseClause as in rewrite.

See attached patch.