[jira] Assigned: (HIVE-1115) optimize combinehiveinputformat in presence of many partitions
[ https://issues.apache.org/jira/browse/HIVE-1115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Namit Jain reassigned HIVE-1115: Assignee: Paul Yang (was: Namit Jain) > optimize combinehiveinputformat in presence of many partitions > -- > > Key: HIVE-1115 > URL: https://issues.apache.org/jira/browse/HIVE-1115 > Project: Hadoop Hive > Issue Type: Improvement > Components: Query Processor >Reporter: Namit Jain >Assignee: Paul Yang > > A query like : > select .. from T where ... > where T contains a very large number of partitions does not work very well > with CombineHiveInputFomat. > A pool is created per directory, which leads to a high number of mappers. > In case all partitions share the same operator tree, and the same partition > description, only a single pool should be created. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Assigned: (HIVE-1115) optimize combinehiveinputformat in presence of many partitions
[ https://issues.apache.org/jira/browse/HIVE-1115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Namit Jain reassigned HIVE-1115: Assignee: Namit Jain > optimize combinehiveinputformat in presence of many partitions > -- > > Key: HIVE-1115 > URL: https://issues.apache.org/jira/browse/HIVE-1115 > Project: Hadoop Hive > Issue Type: Improvement > Components: Query Processor >Reporter: Namit Jain >Assignee: Namit Jain > > A query like : > select .. from T where ... > where T contains a very large number of partitions does not work very well > with CombineHiveInputFomat. > A pool is created per directory, which leads to a high number of mappers. > In case all partitions share the same operator tree, and the same partition > description, only a single pool should be created. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
