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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-6036) If you wrap a SELECT * view around a table, all of the columns are read from the base row even when you SELECT only a subset of the view columns.
Date Tue, 08 Jan 2013 19:46:13 GMT

     [ https://issues.apache.org/jira/browse/DERBY-6036?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rick Hillegas updated DERBY-6036:
---------------------------------

    Description: This also affects SELECTs from views wrapping RestrictedVTIs. Restrictions
are pushed into a restricted VTI if you wrap it in a view. However, projections are not. I
will attach a script showing this problem.  (was: Restrictions are pushed into a restricted
VTI if you wrap it in a view. However, projections are not. I will attach a script showing
this problem.)
        Summary: If you wrap a SELECT * view around a table, all of the columns are read from
the base row even when you SELECT only a subset of the view columns.  (was: If you wrap a
view around a RestrictedVTI, the projection is not pushed into the table function.)
    
> If you wrap a SELECT * view around a table, all of the columns are read from the base
row even when you SELECT only a subset of the view columns.
> -------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-6036
>                 URL: https://issues.apache.org/jira/browse/DERBY-6036
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.10.0.0
>            Reporter: Rick Hillegas
>         Attachments: derby-6036.sql, derbyAST.xml
>
>
> This also affects SELECTs from views wrapping RestrictedVTIs. Restrictions are pushed
into a restricted VTI if you wrap it in a view. However, projections are not. I will attach
a script showing this problem.

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