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Ning Zhang commented on HIVE-2368: ---------------------------------- @Paul Yang, this looks good to me. Can you also review the patch? We'll need this soon. > Determining whether a Column Descriptor is unused may take too long > ------------------------------------------------------------------- > > Key: HIVE-2368 > URL: https://issues.apache.org/jira/browse/HIVE-2368 > Project: Hive > Issue Type: Bug > Components: Metastore > Reporter: Sohan Jain > Attachments: HIVE-2368.1.patch > > > To determine if a column descriptor is unused, we call > listStorageDescriptorsWithCD(), which may return a big list of SDs. This can > severely slow down dropping partitions. > We can add a maximum number of SDs to return, and just ask for 1 SD, since we > are just doing an existential check. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira