JSON Query DSL and Span Queries

[Jan Høydahl <ja...@cominvent.com>]

Hi

I have this XMLParser query that works well that I'd like to convert to JSON Query DSL:

<BooleanQuery fieldName="content">
   <Clause occurs="must">
      <TermQuery>erna</TermQuery>
   </Clause>
   <Clause occurs="should">
      <SpanFirst end="100" boost="1">
         <SpanTerm>solberg</SpanTerm>
      </SpanFirst>
   </Clause>
</BooleanQuery>

What it does is require term "erna" in content field, but give a higher boost if the term "solberg" is within first 100 terms.

So I tried something like this

{
    "query": {
        "bool": {
            "must": [
                {
                    "lucene": {
                        "df": "content",
                        "query": "erna"
                    }
                }
            ],
            "should": [
                {
                    "spanFirst": {
                        "end": 100,
                        "boost": 1,
                        "query": {
                            "spanTerm": {
                                "term": "solberg"
                            }
                        }
                    }
                }
            ]
        }
    }
}

The "must" part works, but the problem is that it cannot find the "spanFirst" parser because it is not registered in the static map in QParserPlugin (https://github.com/apache/solr/blob/main/solr/core/src/java/org/apache/solr/search/QParserPlugin.java#L48:L91)

We don't even seem to have a QParserPlugin class for the Span* family of queries.

So what is the road forward here to support any kind of sub queries in JSON DSL? The documentation is a bit lacking here.

Jan