[jira] Updated: (PIG-1322) Logical Optimizer: change outer join into regular join
[ https://issues.apache.org/jira/browse/PIG-1322?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Daniel Dai updated PIG-1322: Assignee: Xuefu Zhang (was: Daniel Dai) Fix Version/s: 0.9.0 Logical Optimizer: change outer join into regular join -- Key: PIG-1322 URL: https://issues.apache.org/jira/browse/PIG-1322 Project: Pig Issue Type: Sub-task Components: impl Affects Versions: 0.7.0 Reporter: Daniel Dai Assignee: Xuefu Zhang Fix For: 0.9.0 In some cases, we can change the outer join into a regular join. The benefit is regular join is easier to optimize in subsequent optimization. Example: C = join A by a0 LEFT OUTER, B by b0; D = filter C by b0 0; = C = join A by a0, B by b0; D = filter C by b0 0; Because we made this change, so PushUpFilter rule can further push the filter in front of regular join which otherwise cannot. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (PIG-1322) Logical Optimizer: change outer join into regular join
[ https://issues.apache.org/jira/browse/PIG-1322?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Daniel Dai updated PIG-1322: Issue Type: Sub-task (was: New Feature) Parent: PIG-1319 Logical Optimizer: change outer join into regular join -- Key: PIG-1322 URL: https://issues.apache.org/jira/browse/PIG-1322 Project: Pig Issue Type: Sub-task Components: impl Affects Versions: 0.7.0 Reporter: Daniel Dai Assignee: Daniel Dai In some cases, we can change the outer join into a regular join. The benefit is regular join is easier to optimize in subsequent optimization. Example: C = join A by a0 LEFT OUTER, B by b0; D = filter C by b0 0; = C = join A by a0, B by b0; D = filter C by b0 0; Because we made this change, so PushUpFilter rule can further push the filter in front of regular join which otherwise cannot. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
