Gopal V created HIVE-19985: ------------------------------ Summary: 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
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)