Hive ignores comments for nested structs
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Key: HIVE-2189
URL: https://issues.apache.org/jira/browse/HIVE-2189
Project: Hive
Issue Type: Bug
Affects Versions: 0.7.0
Reporter: Jakob Homan
Priority: Minor
While it's possible to add comments to struct elements, it doesn't seem to be
possible to then retrieve those comments. For instance:
{noformat}hive> create table test_table(a STRUCT<z:string COMMENT 'comment for
z',x:int> COMMENT 'comment for a');
OK
Time taken: 2.565 seconds
hive> describe test_table;
OK
a struct<z:string,x:int> comment for a
Time taken: 0.139 seconds
hive> describe test_table.a;
OK
z string from deserializer
x int from deserializer
Time taken: 0.096 seconds
hive> describe test_table.a.z;
OK
z string from deserializer
Time taken: 0.089 seconds
hive>{noformat}
In this example, even though a comment has been set to field a.z, it doesn't
show up in the table or struct's description. This is due to the way
MetastoreUtils treats non-struct elements while generating the table
description. This was identified in HIVE-2154.
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