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From "Jakob Homan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2189) Hive ignores comments for nested structs
Date Tue, 31 May 2011 19:09:47 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jakob Homan updated HIVE-2189:
------------------------------

    Description: 
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-2171.

  was:
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.


> Hive ignores comments for nested structs
> ----------------------------------------
>
>                 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-2171.

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