[jira] [Resolved] (TAJO-573) Allow the same column in a schema

["Jihoon Son (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAJO-573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jihoon Son resolved TAJO-573.
-----------------------------

    Resolution: Won't Fix

I had a talk about this issue with Hyunsik in off-line. In the talk, we agreed on that this issue doesn't need to be solved currently. When a real problem is occured in later, we can reopen and solve this issue.

> Allow the same column in a schema
> ---------------------------------
>
>                 Key: TAJO-573
>                 URL: https://issues.apache.org/jira/browse/TAJO-573
>             Project: Tajo
>          Issue Type: Improvement
>          Components: catalog
>            Reporter: Jihoon Son
>             Fix For: 0.8-incubating
>
>
> Recently, I have been working on TAJO-554, and I found that we should allow two or more same columns in a schema to handle the asterisk properly. 
> My try in TAJO-554 is rewriting asterisks with their relations' schemas. So, the resulting schema can contain multiple same columns. Here is an example.
> {noformat}
> postgres=# select n_name, n_nationkey+10, *, n_regionkey from nation;
>           n_name           | ?column? | n_nationkey |          n_name           | n_regionkey |                                                     n_comment                                                      | n_regionkey 
> ---------------------------+----------+-------------+---------------------------+-------------+--------------------------------------------------------------------------------------------------------------------+-------------
>  ALGERIA                   |       10 |           0 | ALGERIA                   |           0 |  haggle. carefully final deposits detect slyly agai                                                                |           0
>  ARGENTINA                 |       11 |           1 | ARGENTINA                 |           1 | al foxes promise slyly according to the regular accounts. bold requests alon                                       |           1
> {noformat}



--
This message was sent by Atlassian JIRA
(v6.1.5#6160)