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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-13109) NPE: Fix NDV estimator use within the StatsOptimizer
Date Sat, 20 Feb 2016 04:39:18 GMT
Gopal V created HIVE-13109:
------------------------------

             Summary: NPE: Fix NDV estimator use within the StatsOptimizer
                 Key: HIVE-13109
                 URL: https://issues.apache.org/jira/browse/HIVE-13109
             Project: Hive
          Issue Type: Bug
          Components: Statistics
    Affects Versions: 2.1.0
            Reporter: Gopal V
            Assignee: Gopal V
             Fix For: 2.1.0


compute_stats() UDF's size estimates only work within the Execution engine, not during optimizer
pass.

{code}
java.lang.NullPointerException
        at org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeStats$GenericUDAFNumericStatsEvaluator$NumericStatsAgg.estimate(GenericUDAFComputeStats.java:434)
        at org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeStats$GenericUDAFDoubleStatsEvaluator$DoubleStatsAgg.estimate(GenericUDAFComputeStats.java:643)
        at org.apache.hadoop.hive.ql.optimizer.stats.annotation.StatsRulesProcFactory$GroupByStatsRule.checkMapSideAggregation(StatsRulesProcFactory.java:996)
{code}



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