OAK-3994: Simple query on suggestion/spellcheck with unambiguous index def and one descendant clause should work Checking against path restriction would work using ancestor field. Term range query over a sub-tree can create a big 'in' clause internally.
jackrabbit/oak/trunk/oak-lucene/src/main/java/org/apache/jackrabbit/oak/plugins/index/lucene/LucenePropertyIndex.java