Jim Ferenczi created LUCENE-7747:
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Summary: QueryBuilder should build side-paths query (graph query)
lazily
Key: LUCENE-7747
URL: https://issues.apache.org/jira/browse/LUCENE-7747
Project: Lucene - Core
Issue Type: Improvement
Reporter: Jim Ferenczi
In LUCENE-7638 we generate a query for each multi-token path in the graph and
combine them at the end in a boolean query.
This can lead to OOM when the number of path is big, instead we should build
the disjunction of these paths lazily in order to throw "too many clauses"
early if the number of paths is bigger than max boolean clauses.
For instance a shingle filter with shingles of different size produces a graph
with multiple side paths at each position. If the input query has a lot of
tokens, the number of paths (query) created is exponential. For this use case
it is maybe preferable to disallow graph query analysis completely but when
allowed we should also be protected against combinatorial explosion.
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