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https://issues.apache.org/jira/browse/DERBY-3479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575514#action_12575514
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A B commented on DERBY-3479:
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Thanks for the insight, Knut. I don't know much about how it all works, but
your theory seems reasonable to me...for what very little that may be worth.
> Aren't all of these tables so small that they should fit on a single page?
I would think so, at least for the first part of the test. I have no idea why
that's not the case--nor why compression appears to lead to an *extra* page...
I went ahead and committed d3479_1.diff with svn # 634064:
URL: http://svn.apache.org/viewvc?rev=634064&view=rev
If it turns out the extra page is undesirable and/or the change is not a good
one, then the commit can always be backed out.
> Changed/unexpected query plan when running test 'lang/predicatePushdown.sql'
> ----------------------------------------------------------------------------
>
> Key: DERBY-3479
> URL: https://issues.apache.org/jira/browse/DERBY-3479
> Project: Derby
> Issue Type: Bug
> Components: Regression Test Failure
> Affects Versions: 10.4.0.0
> Environment: OS: Solaris 10 6/06 s10x_u2wos_09a X86 64bits - SunOS
> 5.10 Generic_118855-14
> JVM: Sun Microsystems Inc., java version "1.6.0_04", Java(TM) SE Runtime
> Environment (build 1.6.0_04-b12), Java HotSpot(TM) Client VM (build 10.0-b19,
> mixed mode)
> Reporter: Ole Solberg
> Attachments: d3479_1.diff
>
>
> Seen in tinderbox since r631930.
> See e.g.
> http://dbtg.thresher.com/derby/test/tinderbox_trunk16/jvm1.6/testing/testlog/SunOS-5.10_i86pc-i386/631932-derbyall_diff.txt
> :
> *** Start: predicatePushdown jdk1.6.0_04 derbyall:derbylang 2008-02-28
> 14:02:49 ***
> 9285 del
> < Rows seen from the left = 20
> 9285a9285
> > Rows seen from the left = 10
> 9297 del
> < Rows seen from the right = 20
> 9297a9297
> > Rows seen from the right = 10
> 9299 del
> < Rows returned = 20
> 9299a9299
> > Rows returned = 10
> .
> .
> .
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