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https://issues.apache.org/jira/browse/APEXMALHAR-2191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15437772#comment-15437772
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Thomas Weise commented on APEXMALHAR-2191:
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We need ability to iterate over keys with or without prefix. If the underlying
storage orders keys, prefix scan is cheap.
> Implement a way to get all keys from SpillableByteMapImpl
> ---------------------------------------------------------
>
> Key: APEXMALHAR-2191
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-2191
> Project: Apache Apex Malhar
> Issue Type: Sub-task
> Reporter: David Yan
> Assignee: David Yan
>
> This is needed by the spillable implementation of WindowStateMap. The
> WindowedOperator needs a way to traverse all windows in its state.
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