[ https://issues.apache.org/jira/browse/PIG-563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pradeep Kamath updated PIG-563: ------------------------------- Attachment: PIG-563.patch > PERFORMANCE: enable combiner to be called 0 or more times whenver the > combiner is used for a pig query > ------------------------------------------------------------------------------------------------------ > > Key: PIG-563 > URL: https://issues.apache.org/jira/browse/PIG-563 > Project: Pig > Issue Type: Improvement > Affects Versions: types_branch > Reporter: Pradeep Kamath > Assignee: Pradeep Kamath > Fix For: types_branch > > Attachments: PIG-563.patch > > > Currently Pig's use of the combiner assumes the combiner is called exactly > once in Hadoop. With Hadoop 18, the combiner could be called 0, 1 or more > times. This issue is to track changes needed in the CombinerOptimizer visitor > and the builtin Algebraic UDFS (SUM, COUNT, MIN, MAX, AVG) to be able to work > in this new model. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.