[LUCENE-8200] Allow doc-values to be updated atomically together with a document

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 7.4, 8.0
• Lucene Fields: New, Patch Available
• Assignee: Simon Willnauer
• Reporter: Simon Willnauer
• Created: 12/Mar/18 13:58
• Updated: 28/Aug/22 15:26
• Resolved: 14/Mar/18 08:24

Description

Today we can only update a document by deleting all previously indexed documents for the given term. In some cases like when deletes are not `final` in the way that documents that are marked as deleted should not be merged away a `soft-delete` is needed which is possible when doc-values updates can be done atomically just like delete and add in updateDocument(s)

This change introduces such a soft update that reuses all code paths from deletes to update all previously updated documents for a given term instead of marking it as deleted. This is a spinnoff from LUCENE-8198