[ https://issues.apache.org/jira/browse/HIVE-19985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eugene Koifman updated HIVE-19985: ---------------------------------- Attachment: HIVE-19985.05.patch > ACID: Skip decoding the ROW__ID sections for read-only queries > --------------------------------------------------------------- > > Key: HIVE-19985 > URL: https://issues.apache.org/jira/browse/HIVE-19985 > Project: Hive > Issue Type: Improvement > Components: Transactions > Reporter: Gopal V > Assignee: Eugene Koifman > Priority: Major > Labels: Branch3Candidate > Attachments: HIVE-19985.01.patch, HIVE-19985.04.patch, > HIVE-19985.05.patch > > > For a base_n file there are no aborted transactions within the file and if > there are no pending delete deltas, the entire ACID ROW__ID can be skipped > for all read-only queries (i.e SELECT), though it still needs to be projected > out for MERGE, UPDATE and DELETE queries. > This patch tries to entirely ignore the ACID ROW__ID fields for all tables > where there are no possible deletes or aborted transactions for an ACID split. -- This message was sent by Atlassian JIRA (v7.6.3#76005)