Thomas Tauber-Marshall created HIVE-15061:
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Summary: Metastore types are sometimes case sensitive
Key: HIVE-15061
URL: https://issues.apache.org/jira/browse/HIVE-15061
Project: Hive
Issue Type: Bug
Components: API
Affects Versions: 1.1.0
Reporter: Thomas Tauber-Marshall
Impala recently encountered an issue with the metastore
([IMPALA-4260|https://issues.cloudera.org/browse/IMPALA-4260] ) where column
stats would get dropped when adding a column to a table.
The reason seems to be that Hive does a case sensitive check on the column
stats types during an "alter table" and expects the types to be all lower case.
This case sensitive check doesn't appear to happen when the stats are set in
the first place.
We're solving this on the Impala end by storing types in the metastore as all
lower case, but Hive's behavior here is very confusing. It should either always
be case sensitive, so that you can't create column stats with types that Hive
considers invalid, or it should never be case sensitive.
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