Rui Li created HIVE-10261:
-----------------------------
Summary: Data size can be underestimated when computed with
partial column stats
Key: HIVE-10261
URL: https://issues.apache.org/jira/browse/HIVE-10261
Project: Hive
Issue Type: Bug
Reporter: Rui Li
With {{hive.stats.fetch.column.stats=true}}, we'll estimate data size with
column stats when annotating operators with statistics. However, when column
stats is partial, we're likely to underestimate data size, which may hurt
performance, e.g. picking an inappropriate small table for map join.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
