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https://issues.apache.org/jira/browse/HIVE-21524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16804038#comment-16804038
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David Mollitor commented on HIVE-21524:
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Another thought... Impala, as I understand it, cannot insert into Avro tables.
Allowing a user to switch engines could allow users to insert with Hive and
switch over to Impala to query.
> Impala Engine
> -------------
>
> Key: HIVE-21524
> URL: https://issues.apache.org/jira/browse/HIVE-21524
> Project: Hive
> Issue Type: New Feature
> Affects Versions: 4.0.0
> Reporter: David Mollitor
> Priority: Major
>
> Now that Impala has "dedicated coordinator" capability, it could be
> interesting to pair HiveServer2 instances with Impala dedicated coordinators
> on the same localhost. A client could request an 'impala' execution engine
> and subsequent queries would be routed to the local coordinator.
> {code:sql}
> set hive.execution.engine=impala;
> {code}
> This would allow clients seamless access to both capabilities without needing
> different connections or drivers, Hive would also be a central location for
> auditing and authorization.
> https://www.cloudera.com/documentation/enterprise/latest/topics/impala_dedicated_coordinator.html
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