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Gopal V commented on HIVE-7589: ------------------------------- [~prasanth_j]: HIVE-7156 isn't critical. We can revisit it, if it gets too complex to estimate map.aggr performance. > Some fixes and improvements to statistics annotation rules > ---------------------------------------------------------- > > Key: HIVE-7589 > URL: https://issues.apache.org/jira/browse/HIVE-7589 > Project: Hive > Issue Type: Sub-task > Components: Query Processor, Statistics > Affects Versions: 0.14.0 > Reporter: Prasanth J > Assignee: Prasanth J > Attachments: HIVE-7589.1.patch, HIVE-7589.2.patch > > > *FIXES:* > 1) JOIN rule does not properly propagate the column statistics from its parent > 2) Multi-way join rule computes the denominator for #rows estimation wrongly > 3) GROUPBY rule does not account for the data size of aggregate column > 4) Prefix removal from column names isn't working > 5) GROUPBY rule looks at missing column statistics for aggregate column from > its parent and assumes PARTIAL column stats state > *IMPROVEMENTS:* > 1) Replace "EXPLAIN EXTENDED" with "EXPLAIN" in test cases to make the golden > files easy to comprehend and to reduce verbosity > 2) Introduce rule for ReduceSink operator which only does renaming of column > statistics as per output row schema > 3) Add more rows to the test datasets to avoid 0 row scenario in join test > cases > 4) JOIN rule improvement to avoid long overflow -- This message was sent by Atlassian JIRA (v6.2#6252)