Daniel Dai created HIVE-20896:

             Summary: CachedStore fail to cache stats in multiple code paths
                 Key: HIVE-20896
                 URL: https://issues.apache.org/jira/browse/HIVE-20896
             Project: Hive
          Issue Type: Bug
          Components: Standalone Metastore
            Reporter: Daniel Dai
            Assignee: Daniel Dai

Bunch of issues discovered in CachedStore to keep up column statistics:
1. The criteria for partition/non-partition is wrong 
(table.isSetPartitionKeys() is always true)
2. In update(), partition column stats are removed when populate table basic 
3. Dirty flags are true right after prewarm(), so the first update() does not 
do anything
4. Could invoke cacheLock without holding the lock, which results a freeze in 

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