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From "Chaoyu Tang" <>
Subject Review Request 31759: HIVE-9620: Cannot retrieve column statistics using HMS API if column name contains uppercase characters
Date Thu, 05 Mar 2015 03:16:57 GMT

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Review request for hive, Ashutosh Chauhan, Brock Noland, Szehon Ho, and Xuefu Zhang.

Bugs: HIVE-9620

Repository: hive-git


The identifier such as column name is stored in lowercase in metastore backend tables. Hive
usually converts these identifiers to lowercase before calling HMS APIs, but it might not
be always true. Other HMS clients like Impala might also not do that. So we need convert the
identifiers in HMS request to lowercase in before querying backend tables.
Some existing APIs in HiveMetaStore have already done this conversion but others have not,
especially those APIs for Statistics with StatsRequest. This patch is going to change all
these identifiers passed in StatRequest to lowercase before querying backend tables.


  metastore/src/java/org/apache/hadoop/hive/metastore/ 379abaf3cd883163e6b94c86f35c501024c98150



PreCommit tests passed:


Chaoyu Tang

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