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https://issues.apache.org/jira/browse/HIVE-13109?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V resolved HIVE-13109.
----------------------------
Resolution: Done
> 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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