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https://issues.apache.org/jira/browse/ASTERIXDB-68?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Till Westmann closed ASTERIXDB-68.
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Resolution: Fixed
The sort-based group-by solves this.
> Duplicate elimination option in ExternalSortOperator.
> -----------------------------------------------------
>
> Key: ASTERIXDB-68
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-68
> Project: Apache AsterixDB
> Issue Type: Improvement
> Components: Hyracks
> Reporter: asterixdb-importer
> Assignee: Yingyi Bu
>
> Duplicate elimination option in ExternalSortOperator.
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