karanmehta93 commented on issue #433: PHOENIX-4009 Run UPDATE STATISTICS command by using MR integration on… URL: https://github.com/apache/phoenix/pull/433#issuecomment-458023640 Here's a brief insight on the addendum PR. A bug was found which was causing compactions to fail on tables if stats were disabled on server side completely (the property `QueryServices#STATS_COLLECTION_ENABLED` is disabled). New integration tests are added in `NoOpStatsCollectorIT` to test that scenario. `StatsCollectionDisabledOnServerException` is thrown in such conditions. `UngroupedAggregateRegionObserver` contains code changes that create appropriate Scanner object on server side. Others are mostly code refactoring changes and package name changes. Please review @dbwong @BinShi-SecularBird
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