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From "Ashish Thusoo (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-62) Add ability to describe nested types
Date Fri, 14 Nov 2008 01:58:44 GMT

    [ https://issues.apache.org/jira/browse/HIVE-62?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12647498#action_12647498

Ashish Thusoo commented on HIVE-62:

yes that is a possibility. One problem from a usability angle though is that even if I know
the path to the field I would have to go though multiple describe types to get to the member
that I am interested in finding the type of. e.g.

{int a;
 lObj b;

Obj {
  int c;

In order to find the type for c I would have to

describe T;

which would give me 

int a
Obj b;

then I would have to

describe type Obj;

which would give me

int c;

instead of just saying

describe T.b

Having a TYPE keyword though is a good idea, though Oracle and other OORDBMS do not make this

Check out the Oracle type syntax at


though Oracle itself does not support the dotted notation to find the type of an element represented
by an xpath expression as far as I know.

> Add ability to describe nested types
> ------------------------------------
>                 Key: HIVE-62
>                 URL: https://issues.apache.org/jira/browse/HIVE-62
>             Project: Hadoop Hive
>          Issue Type: New Feature
>            Reporter: Ashish Thusoo
>            Assignee: Ashish Thusoo
> Add ability to describe nested types.

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