[ https://issues.apache.org/jira/browse/HIVE-23768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HIVE-23768: ---------------------------------- Labels: pull-request-available (was: ) > Metastore's update service wrongly strips partition column stats from the > cache > ------------------------------------------------------------------------------- > > Key: HIVE-23768 > URL: https://issues.apache.org/jira/browse/HIVE-23768 > Project: Hive > Issue Type: Bug > Reporter: Stamatis Zampetakis > Assignee: Stamatis Zampetakis > Priority: Critical > Labels: pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > Metastore's update service wrongly strips partition column stats from the > cache in an attempt to update them. The issue may go unnoticed since missing > stats do not lead to query failures. > However, they can alter significantly the query plan affecting performance. > Moreover, they lead to flakiness since some times the stats are present and > sometimes are not leading to a query that has a different plan overtime. > Normally missing elements from the cache shouldn't be a correctness problem > since we can always fallback to the raw stats. Unfortunately, there are many > interconnections with other parts of the code (e.g., code to obtain aggregate > statistics) where this contract breaks. -- This message was sent by Atlassian Jira (v8.3.4#803005)