GitHub user zuyu opened a pull request:

    Determine #Partitions for Aggr State Hash Table in the optimizer.

    This PR allows the optimizer to determine the number of partitions for an 
aggregation state hash table, instead of getting it during the run-time from 
the aggregation state.
    Assigned to @jianqiao.

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    This closes #273
commit 3d9926db375328e1150a30220d3c95c46510c763
Author: Zuyu Zhang <>
Date:   2017-07-20T20:33:54Z

    Determine #Partitions for Aggr State Hash Table in the optimizer.


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