Simon Willnauer created LUCENE-8233:
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Summary: Add support for soft deletes to IndexWriter delete
accounting
Key: LUCENE-8233
URL: https://issues.apache.org/jira/browse/LUCENE-8233
Project: Lucene - Core
Issue Type: Improvement
Affects Versions: 7.4, master (8.0)
Reporter: Simon Willnauer
Fix For: 7.4, master (8.0)
This change adds support for soft deletes as a fully supported feature by the
index writer. Soft deletes are accounted for inside the index writer and
therefor also by merge policies.
This change also adds a SoftDeletesRetentionMergePolicy that allows users to
selectively carry over soft_deleted document across merges for retention
policies. The merge policy selects documents that should be kept around in the
merged segment based on a user provided query.
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