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ql/src/java/org/apache/hadoop/hive/ql/exec/DDLTask.java <https://reviews.apache.org/r/23421/#comment83827> Accuracy is for column stats which are stored in PART_COL_STATS tbl in metastore. (not simple stats stored in partition properties) Column stats become stale after truncate. So, this flag is set to false. Ideally, in such cases we should also delete those stats, but setting this flag to false is done in line with how we are invalidating column stats in case of other alter statements. In a separate jira we should drop column statistics in case of alter statements (including truncate). - Ashutosh Chauhan On July 11, 2014, 9:55 p.m., Ashutosh Chauhan wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/23421/ > ----------------------------------------------------------- > > (Updated July 11, 2014, 9:55 p.m.) > > > Review request for hive. > > > Bugs: HIVE-7213 > https://issues.apache.org/jira/browse/HIVE-7213 > > > Repository: hive-git > > > Description > ------- > > invalidate stats when table is truncated > > > Diffs > ----- > > ql/src/java/org/apache/hadoop/hive/ql/exec/DDLTask.java bbf89ef > ql/src/test/queries/clientpositive/truncate_table.q 769b10f > ql/src/test/results/clientpositive/truncate_table.q.out 718895c > > Diff: https://reviews.apache.org/r/23421/diff/ > > > Testing > ------- > > added new tests > > > Thanks, > > Ashutosh Chauhan > >
