[jira] [Updated] (HIVE-3236) allow column names to be prefixed by table alias in select all queries

["Keegan Mosley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-3236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Keegan Mosley updated HIVE-3236:
--------------------------------

    Attachment: HIVE-3236.1.patch.txt
    
> allow column names to be prefixed by table alias in select all queries
> ----------------------------------------------------------------------
>
>                 Key: HIVE-3236
>                 URL: https://issues.apache.org/jira/browse/HIVE-3236
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>    Affects Versions: 0.10.0, 0.9.1
>            Reporter: Keegan Mosley
>            Priority: Minor
>             Fix For: 0.10.0
>
>         Attachments: HIVE-3236.1.patch.txt
>
>
> When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
> There should be some conf flag that would allow queries like
> "create table joined as select one.*, two.* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
> to create a table with columns one_duplicate_field and two_duplicate_field.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira