Zoltán Borók-Nagy created IMPALA-10840:
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Summary: Add support for "FOR SYSTEM_TIME AS OF" and "FOR
SYSTEM_VERSION AS OF" for Iceberg tables
Key: IMPALA-10840
URL: https://issues.apache.org/jira/browse/IMPALA-10840
Project: IMPALA
Issue Type: Sub-task
Components: Frontend
Reporter: Zoltán Borók-Nagy
SQL11 introduced a couple of temporal features:
https://cs.ulb.ac.be/public/_media/teaching/infoh415/tempfeaturessql2011.pdf
One of them is FOR SYSTEM_TIME AS OF which can be part of the table reference:
https://jakewheat.github.io/sql-overview/sql-2011-foundation-grammar.html#query-system-time-period-specification
With this extension the users are able to query the table at a given time point.
HIVE-25344 also added support for this. It also adds another, non-standard
clause: FOR SYSTEM_VERSION AS OF.
In Impala we should add both to support time travel for Iceberg tables.
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