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From Aihua Xu <...@cloudera.com>
Subject Re: Review Request 47353: HIVE-13616: Investigate renaming a table without invalidating the column stats
Date Tue, 17 May 2016 13:25:33 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/47353/
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(Updated May 17, 2016, 1:25 p.m.)


Review request for hive and Chaoyu Tang.


Repository: hive-git


Description
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HIVE-13616: Investigate renaming a table without invalidating the column stats


Diffs (updated)
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  metastore/src/java/org/apache/hadoop/hive/metastore/HiveAlterHandler.java 0652b9d 
  ql/src/test/queries/clientpositive/rename_table_update_column_stats.q PRE-CREATION 
  ql/src/test/results/clientpositive/rename_table_update_column_stats.q.out PRE-CREATION 

Diff: https://reviews.apache.org/r/47353/diff/


Testing
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Tests have been run and the failed tests don't seem to be related. 

To carry over the column stats during renaming the table, the patch 
1. Save affected column stats
2. Rename the table
3. Write the saved column stats for the new table.

In this order, column stats will find the foreign key when writing in 3).


Thanks,

Aihua Xu


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