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From "Carl Steinbach (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1126) Missing some Jdbc functionality like getTables getColumns and HiveResultSet.get* methods based on column name.
Date Fri, 23 Jul 2010 08:49:56 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12891524#action_12891524
] 

Carl Steinbach commented on HIVE-1126:
--------------------------------------

bq. I've changed all things Carl said except for the copying the input lists. These lists
are explicitly created to be used on this resultset only and can't possibly be modified by
anything. I think I should have made them final like this

In Java a final variable can only be assigned to once. Making a variable final does not make
it immutable, and making the constructor parameters columnNames and columnTypes final won't
prevent the caller from later mutating these lists and affecting the internal state of the
ResultSet object. I think it's prudent to make this change now since it's hard to anticipate
how this class will be used in the future.


> Missing some Jdbc functionality like getTables getColumns and HiveResultSet.get* methods
based on column name.
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-1126
>                 URL: https://issues.apache.org/jira/browse/HIVE-1126
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Clients
>    Affects Versions: 0.7.0
>            Reporter: Bennie Schut
>            Assignee: Bennie Schut
>             Fix For: 0.7.0
>
>         Attachments: HIVE-1126-1.patch, HIVE-1126-2.patch, HIVE-1126-3.patch, HIVE-1126.patch,
HIVE-1126_patch(0.5.0_source).patch
>
>
> I've been using the hive jdbc driver more and more and was missing some functionality
which I added
> HiveDatabaseMetaData.getTables
> Using "show tables" to get the info from hive.
> HiveDatabaseMetaData.getColumns
> Using "describe tablename" to get the columns.
> This makes using something like SQuirreL a lot nicer since you have the list of tables
and just click on the content tab to see what's in the table.
> I also implemented
> HiveResultSet.getObject(String columnName) so you call most get* methods based on the
column name.

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