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https://issues.apache.org/jira/browse/IOTDB-1435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17363476#comment-17363476
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ZhaoXin commented on IOTDB-1435:
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https://github.com/apache/iotdb/pull/3389
> Support set/unset ttl to a prefix path
> --------------------------------------
>
> Key: IOTDB-1435
> URL: https://issues.apache.org/jira/browse/IOTDB-1435
> Project: Apache IoTDB
> Issue Type: Improvement
> Components: Schema Manager
> Reporter: Jialin Qiao
> Priority: Minor
>
> Currently, the set ttl or unset ttl statement could only with a storage group
> path. However, this may cause trouble when having many storage groups.
> So, it's better to set/unset TTL on any prefix path, we find the storage
> group under this prefix and set/unsert the TTL.
> For example, we have storage group: root.a.sg1, root.a.sg2, root.b.sg3,
> root.b.sg4.
> set ttl to root.a 1000 will set 1000 to root.a.sg1 and root.a.sg2.
>
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