[jira] [Assigned] (PHOENIX-1749) ORDER BY should support column position as well as column alias

["Alicia Ying Shu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-1749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alicia Ying Shu reassigned PHOENIX-1749:
----------------------------------------

    Assignee: Alicia Ying Shu

> ORDER BY should support column position as well as column alias
> ---------------------------------------------------------------
>
>                 Key: PHOENIX-1749
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1749
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: Serhiy Bilousov
>            Assignee: Alicia Ying Shu
>
> In postgreSQL (and many others DBs) you can specify not only column name for the ORDER BY but column number (position in SELECT part) as well as column alias.
> see:
> http://www.postgresql.org/docs/9.4/static/queries-order.html
> http://www.postgresql.org/docs/9.4/static/sql-select.html#SQL-GROUPBY
> Adding such support would be very helpful and sometimes necessary.
> I can provide real queries example if required but basically we want something like this
> given query
> SELECT a, b, TRUNC(current_date(),'HOUR') AS date_truncated FROM table 
> we want 
> ORDER BY 1 ASC, 2 DESC
> ORDER BY date_truncated 
> Having just column number would cover both but having column alias would make queries more readable and human friendly. Plus make it one little stem closer to postgreSQL and SQL standard.



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