David Smiley created SOLR-13326:
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Summary: Introduce new nest path query parser
Key: SOLR-13326
URL: https://issues.apache.org/jira/browse/SOLR-13326
Project: Solr
Issue Type: Sub-task
Security Level: Public (Default Security Level. Issues are Public)
Components: query parsers
Reporter: David Smiley
Since the advent of the special field _nest_path_ (for nested documents), the
{{[child childFilter=...]}} query supports a barely documented syntax for
matching children based on the path in this field. It's currently implemented
here:
`org.apache.solr.response.transform.ChildDocTransformerFactory#processPathHierarchyQueryString`.
It occurred to me that this would be better formed as a query parser so that
it might be used in other contexts. Furthermore the block join query parsers
could detect and use it just as the child doc transformer does so today. _This
is just an idea; I haven't fully thought it through._
One small change I'd suggest to the current detection logic is that if the
query starts with a '{' then don't try to guess if it's a path style query.
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