[ https://issues.apache.org/jira/browse/HIVE-1938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Edward Capriolo resolved HIVE-1938. ----------------------------------- Resolution: Duplicate > Cost Based Query optimization for Joins in Hive > ----------------------------------------------- > > Key: HIVE-1938 > URL: https://issues.apache.org/jira/browse/HIVE-1938 > Project: Hive > Issue Type: Improvement > Components: Query Processor, Statistics > Environment: *nix,java > Reporter: bharath v > Assignee: bharath v > > Current optimization in Hive is just rule-based and involves applying a set > of rules on the Plan tree. This depends on hints given by the user (which may > or may-not be correct) and might result in execution of costlier plans.So > this jira aims at building a cost-model which can give a good estimate > various plans before hand (using some meta-data already collected) and we can > choose the best plan which incurs the least cost. -- This message was sent by Atlassian JIRA (v6.4.14#64029)