[jira] [Created] (HIVE-12074) Conditionally turn off hybrid grace hash join based on est. data size, etc

[Wei Zheng (JIRA)]

Wei Zheng created HIVE-12074:
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             Summary: Conditionally turn off hybrid grace hash join based on 
est. data size, etc
                 Key: HIVE-12074
                 URL: https://issues.apache.org/jira/browse/HIVE-12074
             Project: Hive
          Issue Type: Bug
          Components: Hive
    Affects Versions: 1.2.1, 1.2.0
            Reporter: Wei Zheng
            Assignee: Wei Zheng


Currently, as long as the below flag is set to true, we always do grace hash 
join for map join. This may not be necessary, esp. for cases where the data 
size is quite small, and number of distinct values is also small.

hive.mapjoin.hybridgrace.hashtable



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