Optimization rule PushUpFilter causes filter to be pushed up out joins ----------------------------------------------------------------------
Key: PIG-1574 URL: https://issues.apache.org/jira/browse/PIG-1574 Project: Pig Issue Type: Bug Reporter: Xuefu Zhang Assignee: Xuefu Zhang Fix For: 0.8.0 The PushUpFilter optimization rule in the new logical plan moves the filter up to one of the join branch. It does this aggressively by find an operator that has all the projection UIDs. However, it didn't consider that the found operator might be another join. If that join is outer, then we cannot simply move the filter to one of its branches. As an example, the following script will be erroneously optimized: A = load 'myfile' as (d1:int); B = load 'anotherfile' as (d2:int); C = join A by d1 full outer, B by d2; D = load 'xxx' as (d3:int); E = join C by d1, D by d3; F = filter E by d1 > 5; G = store F into 'dummy'; -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.