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https://issues.apache.org/jira/browse/HIVE-6449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13904112#comment-13904112
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Remus Rusanu commented on HIVE-6449:
------------------------------------
Fixed by adding Derby jar into the CLASSPATH, right there in hadoop.cmd. Just
one more hack to get .q tests to run on Windows... I wish the whole
pom->surefire->driver->hadoopCLI->task chain would work correctly vis-a-vis
execution on a Windows environment, but is beyond my bandwith to fix it now.
I'm explaining my hack fix for the unfortunate soul running into this later...
and that includes myself 2 months later when I forgot what I did.
> EXPLAIN has diffs in Statistics in tests generated on Windows vs. test
> generated on Linux
> -----------------------------------------------------------------------------------------
>
> Key: HIVE-6449
> URL: https://issues.apache.org/jira/browse/HIVE-6449
> Project: Hive
> Issue Type: Bug
> Components: Tests
> Reporter: Remus Rusanu
> Assignee: Remus Rusanu
> Priority: Critical
>
> When .q.out files are generated on Windows the statistics in EXPLAIN differ
> from ones generated on Linux. Eg:
> {code}
> Running: diff -a
> /root/hive/itests/qtest/../../itests/qtest/target/qfile-results/clientpositive/vectorized_parquet.q.out
>
> /root/hive/itests/qtest/../../ql/src/test/results/clientpositive/vectorized_parquet.q.out
> 72c72
> < Statistics: Num rows: 12288 Data size: 73728 Basic stats:
> COMPLETE Column stats: NONE
> ---
> > Statistics: Num rows: 2072 Data size: 257046 Basic stats:
> > COMPLETE Column stats: NONE
> 75c75
> < Statistics: Num rows: 6144 Data size: 36864 Basic stats:
> COMPLETE Column stats: NONE
> ---
> > Statistics: Num rows: 1036 Data size: 128523 Basic stats:
> > COMPLETE Column stats: NONE
> {code}
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