Sergey Shelukhin created HIVE-5483:
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Summary: use metastore statistics to optimize max/min/etc. queries
Key: HIVE-5483
URL: https://issues.apache.org/jira/browse/HIVE-5483
Project: Hive
Issue Type: Improvement
Reporter: Sergey Shelukhin
We have discussed this a little bit.
Hive can answer queries such as select max(c1) from t purely from metastore
using partition statistics, provided that we know the statistics are up to date.
All data changes (e.g. adding new partitions) currently go thru metastore so we
can track up-to-date-ness. If they are not up-to-date, the queries will have to
read data (at least for outdated partitions) until someone runs analyze table.
We can also analyze new partitions after add, if that is configured/specified
in the command.
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