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[jira] [Created] (CALCITE-2376) migrate elastic adapters to (low-level) rest client

Andrei Sereda created CALCITE-2376:

             Summary: migrate elastic adapters to (low-level) rest client
                 Key: CALCITE-2376
             Project: Calcite
          Issue Type: Improvement
          Components: elasticsearch-adapter
            Reporter: Andrei Sereda
            Assignee: Julian Hyde

This is an effort to migrate existing Elastic Search adapters to use [low-level rest client|]. Existing [native transport client|] has been deprecated in 7.0 (to be removed in 8.x).

Another advantage of low-level client is that it is compatible with any ES server version and has few (non-core) dependencies. Part of this improvement, both ES2 and ES5 adapters will be unified and reside under new maven module {{elasticsearch}} (contrary to separate {{elasticsearch2}} and {{elasticsearch5}}).
h3. Breaking changes

Using new {{artifactId}} and {{SchemaFactory}} implementation will force clients to change their configuration and dependencies. No other breaking changes are expected. 

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