Nathan Gass created LUCENE-7744:
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Summary: default value for scoring payloads
Key: LUCENE-7744
URL: https://issues.apache.org/jira/browse/LUCENE-7744
Project: Lucene - Core
Issue Type: New Feature
Components: core/query/scoring
Reporter: Nathan Gass
Priority: Minor
In lucene 5, PayloadTermQuery used a hardcoded default of 1.0 for terms without
a payload. The replacing PayloadScoreQuery in lucene 6 just ignores those
terms. This is unflexible and wrong for many use cases (for example using
Payloads to deemphasize some terms, where terms without payload should result
in maximum score instead of being ignored).
In my pull request I defer the decision on what to do with missing payloads to
the scorePayload method of the similarity, which has to check the given payload
for null and handle that case. I believe this breaks backwards compatibility?
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