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Posted to derby-dev@db.apache.org by "Mike Matrigali (JIRA)" <ji...@apache.org> on 2013/06/12 23:48:20 UTC
[jira] [Commented] (DERBY-6259) Collapse the level 2 optimizer into
its parent module.
[ https://issues.apache.org/jira/browse/DERBY-6259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13681675#comment-13681675 ]
Mike Matrigali commented on DERBY-6259:
---------------------------------------
I am ok with this change, but want to voice concern that we should not give up on running on small devices just
because we have given up on support for the small CDC configuration. I still think a configurable small footprint
is valuable and still hope for either a full JVM that runs on a device or work to make current derby run on available
jvm's on current device os's like android.
> Collapse the level 2 optimizer into its parent module.
> ------------------------------------------------------
>
> Key: DERBY-6259
> URL: https://issues.apache.org/jira/browse/DERBY-6259
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.11.0.0
> Reporter: Rick Hillegas
> Assignee: Rick Hillegas
> Attachments: derby-6259-01-aa-collapseOptimizers.diff
>
>
> Right now there are 2 optimizer implementations, only one of which is ever loaded. The other implementation was disabled by the following comment in modules.properties:
> # use level1 optimizer for small configurations
> #
> # can't do this in the codeline because with 2 implementations, it is entirely
> # by chance which get picked. So we may be running with different modules
> # depending on which jdk
> #
> # to be resolve by Siuling and Dan
> #
> #derby.module.optimizerSmall=org.apache.derby.impl.sql.compile.OptimizerFactoryImpl
> #cloudscape.config.optimizerSmall=cloud,cloudtarget
> Since we have deprecated support for the small CDC configuration, I don't think that we need further resolution by Siuling and Dan. Collapsing the two optimizers together should slightly reduce our static footprint.
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