The journey to support nanosecond timestamps in Elasticsearch
The ability to store dates in nanosecond resolution required a significant refactoring within the Elasticsearch code base. Read this blog post for the why and how on our journey to be able to store dates in nanosecond resolution from Elasticsearch 7.0 onwards. Elasticsearch supports a date mapping type that parses the string representation of a date in a variety of configurable formats, converts this date into milliseconds since the epoch and then stores it as a long value in Lucene.
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