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https://issues.apache.org/jira/browse/DERBY-4833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kristian Waagan updated DERBY-4833:
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Attachment: derby-4833-1a-orderbyandsortavoidancetest_adjustment.diff
Attaching patch 1a, which removes two (identical) asserts in the
lang.OrderByAndSortAvoidance test.
Depending on whether index statistics are present or not, Derby will choose a
table scan or an index scan. This choice is not crucial to the issue being
tested, so it should be safe to remove the assert.
Patch ready for review.
> Prepare existing JUnit tests for running with automatic index statistics
> generation
> -----------------------------------------------------------------------------------
>
> Key: DERBY-4833
> URL: https://issues.apache.org/jira/browse/DERBY-4833
> Project: Derby
> Issue Type: Task
> Components: Test
> Affects Versions: 10.7.0.0
> Reporter: Kristian Waagan
> Assignee: Kristian Waagan
> Priority: Minor
> Attachments: derby-4833-1a-orderbyandsortavoidancetest_adjustment.diff
>
>
> During prototyping of a mechanism to create and update index statistics
> automatically (see DERBY-4771) it turned out that some of the tests fail due
> to the presence of [improved] index statistics.
> Where appropriate the tests should be adjusted to cope with this background
> activity, and where not appropriate it should be noted such that the feature,
> when introduced, can be disabled.
> As part of this effort I will introduce a utility class for dealing with
> index statistics in tests. These will be used by some existing tests and also
> the new tests that will be written for the new feature.
> At this point two tests requiring adjustments have been identified
> (OrderByAndSortAvoidance, UpdateStatisticsTest), and one is under
> investigation (AutoIncrementTest). More may surface as the work on the
> feature progress.
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