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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (DERBY-5947) Factor out common code from generated classes
Date Fri, 19 Oct 2012 10:54:13 GMT

     [ https://issues.apache.org/jira/browse/DERBY-5947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Knut Anders Hatlen resolved DERBY-5947.
---------------------------------------

          Resolution: Fixed
       Fix Version/s: 10.10.0.0
    Issue & fix info:   (was: Patch Available)

Committed the 3a and 4a patches (r1400023 and r1400024).

I don't have any other changes planned for this issue, so I'm marking it as resolved.
                
> Factor out common code from generated classes
> ---------------------------------------------
>
>                 Key: DERBY-5947
>                 URL: https://issues.apache.org/jira/browse/DERBY-5947
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>            Priority: Minor
>             Fix For: 10.10.0.0
>
>         Attachments: d5947-1a-remove-common-methods.diff, d5947-2a-execute-method.diff,
d5947-3a-init-rs.diff, d5947-4a-authorization.diff, natural-join-after-3a.txt, natural-join-decompiled.txt,
values1-after-1a.txt, values1-after-2a.txt, values1-after-3a.txt, values1-after-4a.txt, values1-decompiled.txt
>
>
> There's some code that's added to all classes generated by Derby's query compiler. For
example, there are three static fields that contain statistics used to check if the plan is
stale, and there are getter and setter methods for each of the three fields. The fields and
their accessor methods take up 468 bytes in every generated class.
> We should see if we can factor out some of this code so that there is a single shared
copy in BaseActivation. Advantages would be: less complicated byte-code generation, less memory
occupied by generated classes in the statement cache, smaller disk footprint for stored prepared
statements.

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