Drop support for @IndexedEmbedded.indexNullAs

Description

Elasticsearch doesn't support "null_value" for object fields, and does not support setting a string value (our null token) to an object field either, so I don't see how we can get the same kind of queries we had with the Lucene backend ("path.to.embedded:_null_") working.

Let's give up on this feature, and implement "exists" predicates for object fields (HSEARCH-2389) instead.

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Assignee

Yoann Rodière

Reporter

Yoann Rodière

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