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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-8436) Modify SparkWork to split works with multiple child works [Spark Branch]
Date Sun, 12 Oct 2014 02:43:33 GMT
Xuefu Zhang created HIVE-8436:
---------------------------------

             Summary: Modify SparkWork to split works with multiple child works [Spark Branch]
                 Key: HIVE-8436
                 URL: https://issues.apache.org/jira/browse/HIVE-8436
             Project: Hive
          Issue Type: Sub-task
          Components: Spark
            Reporter: Xuefu Zhang


Based on the design doc, we need to split the operator tree of a work in SparkWork if the
work is connected to multiple child works. The way splitting the operator tree is performed
by cloning the original work and removing unwanted branches in the operator tree. Please refer
to the design doc for details.

This process should be done right before we generate SparkPlan. We should have a utility method
that takes the orignal SparkWork and return a modified SparkWork.

This process should also keep the information about the original work and its clones. Such
information will be needed during SparkPlan generation.



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