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https://issues.apache.org/jira/browse/HIVE-26187?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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László Pintér resolved HIVE-26187.
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Resolution: Not A Bug
> Set operations and time travel is not working
> ---------------------------------------------
>
> Key: HIVE-26187
> URL: https://issues.apache.org/jira/browse/HIVE-26187
> Project: Hive
> Issue Type: Bug
> Reporter: Zoltán Borók-Nagy
> Assignee: László Pintér
> Priority: Major
> Labels: iceberg
>
> Set operations doesn't work well with time travel queries.
> Repro:
> {noformat}
> select * from t FOR SYSTEM_VERSION AS OF <snapshot_id_1>
> MINUS
> select * from t FOR SYSTEM_VERSION AS OF <snapshot_id_2>;
> {noformat}
> Returns 0 results because both selects use the same snapshot id, instead of
> snapshot_id_1 and snapshot_id_2.
> Probably there're issues with other queries as well, when the same table is
> used multiple times with different snapshot ids.
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