[ https://issues.apache.org/jira/browse/PIG-1399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yan Zhou updated PIG-1399: -------------------------- Attachment: PIG-1399.patch rebased on the latest trunk. > Logical Optimizer: Expression optimizor rule > -------------------------------------------- > > Key: PIG-1399 > URL: https://issues.apache.org/jira/browse/PIG-1399 > Project: Pig > Issue Type: Sub-task > Components: impl > Affects Versions: 0.7.0 > Reporter: Daniel Dai > Assignee: Yan Zhou > Fix For: 0.8.0 > > Attachments: PIG-1399.patch, PIG-1399.patch, PIG-1399.patch, > PIG-1399.patch, PIG-1399.patch, PIG-1399.patch > > > We can optimize expression in several ways: > 1. Constant pre-calculation > Example: > B = filter A by a0 > 5+7; > => B = filter A by a0 > 12; > 2. Boolean expression optimization > Example: > B = filter A by not (not(a0>5) or a>10); > => B = filter A by a0>5 and a<=10; -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.