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