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https://issues.apache.org/jira/browse/SPARK-34978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17319375#comment-17319375
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Yann Byron commented on SPARK-34978:
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[~hyukjin.kwon]
Do you mean we should implement time-travel in the side of Delta, instead of
Spark ?
If yes, I think time-travel is a relatively common function for datasource
which has the ability to manage historical snapshots, so than I raise this
issue.
These is some discuss about it: [https://github.com/delta-io/delta/issues/128]
> Support time-travel SQL syntax
> ------------------------------
>
> Key: SPARK-34978
> URL: https://issues.apache.org/jira/browse/SPARK-34978
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 3.1.1
> Reporter: Yann Byron
> Priority: Major
>
> Some DataSource have the ability to query the older snapshot, like Delta.
> The syntax may be like `TIMESTAMP AS OF '
> 2018-10-18 22:15:12' ` to query the snapshot closest to this time point, or
> `VERSION AS OF 12` to query the 12th snapshot.
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