Complete the migration of optimization rule PushUpFilter including missing test
cases
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Key: PIG-1575
URL: https://issues.apache.org/jira/browse/PIG-1575
Project: Pig
Issue Type: Bug
Reporter: Xuefu Zhang
Assignee: Xuefu Zhang
Fix For: 0.8.0
The Optimization rule under the new logical plan, PushUpFilter, only does a
subset of optimization scenarios compared to the same rule under the old
logical plan. For instance, it only considers filter after join, but the old
optimization also considers other operators such as CoGroup, Union, Cross, etc.
The migration of the rule should be complete.
Also, the test cases created for testing the old PushUpFilter wasn't migrated
to the new logical plan code base. It should be also migrated. (A few has been
migrated in JIRA-1574.)
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