Nested Datatype

  • Lucene has no concept of inner objects and hence data is flattened when being indexed with not quite as expected behavior.
  • Data posted
    {
    "group" : "fans",
    "user" : [{
        "first" : "John", "last" :  "Smith"
      },{
        "first" : "Alice", "last" :  "White"
      }
    ]
    }
    
  • Indexed by Lucene as:
    {
    "group" :        "fans",
    "user.first" : [ "alice", "john" ],
    "user.last" :  [ "smith", "white" ]
    }
    
  • What you think would be a consequence of such indexing?
  • Should you be able to find person user.first:john AND user.last:white?
  • Nested is a specialized version of the 'object' datatype that allows querying arrays of objects independently from each other addressing less than perfect search results

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