Refactor percolator's QueryAnalyzer to use QueryVisitors #49238
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romseygeek
added
>enhancement
:Search Relevance/Percolator
Collaborator
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Pinging @elastic/es-search (:Search/Percolator) |
martijnvg
approved these changes
Nov 18, 2019
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| final class QueryAnalyzer { | ||
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| private static final Map<Class<? extends Query>, BiFunction<Query, Version, Result>> QUERY_PROCESSORS = Map.ofEntries( |
Contributor
Author
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I will open a separate PR for the backport to 7x, as it's not a simple process due to the need to handle pre-6.1 indexes. |
This was referenced Feb 3, 2020
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Lucene now allows us to explore the structure of a query using QueryVisitors,
delegating the knowledge of how to recurse through and collect terms to the
query implementations themselves. The percolator currently has a home-grown
external version of this API to construct sets of matching terms that must be
present in a document in order for it to possibly match the query.
This commit removes the home-grown implementation in favour of one using
QueryVisitor. This has the added benefit of making interval queries available
for percolator pre-filtering. Due to a bug in multi-term intervals (LUCENE-9050)
it also includes a clone of some of the lucene intervals logic, that can be removed
once upstream has been fixed.
Closes #45639