genMapRedTasks does the use the tree walker and uses implicit state which makes
it difficult to enhance
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Key: HIVE-69
URL: https://issues.apache.org/jira/browse/HIVE-69
Project: Hadoop Hive
Issue Type: Bug
Reporter: Namit Jain
Assignee: Namit Jain
In SemanticAnalyzer, genmapredtasks() does not use a tree walker. For map-side
joins, the taskplan needs to be enhanced to be possibly
broken at MapSink also. Basically, the code is very difficult to enhance since
there are implicit assumptions that reduce sink is the only
operator where the plan breaks.
This should be enhanced so that the user can implement their own task
generation logic which is independent of the tree walking.
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