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https://reviews.apache.org/r/24575/
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Review request for hive, Gunther Hagleitner and Harish Butani.
Bugs: HIVE-7679
https://issues.apache.org/jira/browse/HIVE-7679
Repository: hive-git
Description
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JOIN operator does not update the column stats when the number of rows changes.
All other operators scales up/down the column statistics when the number of
rows changes. Same should be done for JOIN operator as well. Because of this
dataSize might become negative as numNulls can get bigger than numRows (if
scaling down of column stats is not done).
Diffs
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ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java
f4dffcd
ql/src/test/results/clientpositive/annotate_stats_join.q.out fba3664
Diff: https://reviews.apache.org/r/24575/diff/
Testing
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Thanks,
Prasanth_J
