[jira] Updated: (CAY-1162) SelectDescriptor concept

["Andrus Adamchik (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAY-1162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrus Adamchik updated CAY-1162:
---------------------------------

    Fix Version/s:     (was: 3.0M6)
                   3.0

> SelectDescriptor concept
> ------------------------
>
>                 Key: CAY-1162
>                 URL: https://issues.apache.org/jira/browse/CAY-1162
>             Project: Cayenne
>          Issue Type: Task
>          Components: Cayenne Core Library
>    Affects Versions: 3.0M5
>            Reporter: Andrus Adamchik
>            Assignee: Andrus Adamchik
>             Fix For: 3.0
>
>
> The goal is to create an abstract SelectDescriptor interface that would define what columns a select query contains and how to read them from result set. SelectDescriptor will support stacks of columns (needed in UNION queries with horizontal inheritance), it will also support complex Object[] results, mixing scalars and entities. This is a major refactoring effort that would tie together SELECT clause creating and coding of the DataRow keys (and hopefully will pave a way to future DataRow optimization/removal process). 

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