Sergey Shelukhin created HIVE-19442:
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Summary: convert Hive stats to deltas
Key: HIVE-19442
URL: https://issues.apache.org/jira/browse/HIVE-19442
Project: Hive
Issue Type: Bug
Reporter: Sergey Shelukhin
This would allow for
1) Accurate stats after partial operations like inserts.
2) Better ACID integration.
The idea is for partition stats and table stats to be written as deltas, with a
flag that indicates this is a delta (i.e. "this insert wrote 500 rows").
The flag like this would also allow us to avoid converting old stats.
Thats can be merged after the query if appropriate locking is present and the
table is not transactional, or by compactor, based on ACID watermarks, when the
table is transactional.
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