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https://issues.apache.org/jira/browse/CASSANDRA-2233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000353#comment-13000353
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Folke Behrens commented on CASSANDRA-2233:
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This won't work because it violates the natural order. Imagine two time-based
UUIDs {{t0}} and {{t1}} such that {{t0 < t1}}. There is a non-time-based UUID
{{x}} such that {{x < t0}} and {{x > t1}}. To remedy this you must not compare
both types, you have to sort all time-based UUID either before or after all
other UUIDs.
> Add unified UUIDType
> --------------------
>
> Key: CASSANDRA-2233
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2233
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 0.7.3
> Reporter: Ed Anuff
> Priority: Minor
> Attachments: UUIDType.java
>
>
> Unified UUIDType comparator, compares as time-based if both UUIDs are
> time-based, otherwise uses byte comparison. Based on code from the current
> LexicalUUIDType and TimeUUIDType comparers, so performance and behavior
> should be consistent and compatible.
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