[
https://issues.apache.org/jira/browse/HIVE-7679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Prasanth J updated HIVE-7679:
-----------------------------
Description: JOIN operator does not update the column stats when the number
of rows changes. All other operators scales up/down the column statistics when
the number of rows changes. Same should be done for JOIN operator as well.
Because of this dataSize might become negative as numNulls can get bigger than
numRows (if scaling down of column stats is not done). (was: JOIN operator
does not update the column stats when the number of rows changes. All other
operators scales up/down the column statistics when the number of rows changes.
Same should be done for JOIN operator as well. )
> JOIN operator should update the column stats when number of rows changes
> ------------------------------------------------------------------------
>
> Key: HIVE-7679
> URL: https://issues.apache.org/jira/browse/HIVE-7679
> Project: Hive
> Issue Type: Sub-task
> Components: Query Processor, Statistics
> Affects Versions: 0.14.0
> Reporter: Prasanth J
> Assignee: Prasanth J
> Priority: Minor
> Fix For: 0.13.0
>
>
> JOIN operator does not update the column stats when the number of rows
> changes. All other operators scales up/down the column statistics when the
> number of rows changes. Same should be done for JOIN operator as well.
> Because of this dataSize might become negative as numNulls can get bigger
> than numRows (if scaling down of column stats is not done).
--
This message was sent by Atlassian JIRA
(v6.2#6252)
