[IMPALA-10893] Use old schema during time travel

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.3.0
• Labels: impala-iceberg
• Epic Color: ghx-label-3
• Assignee: Andrew Sherman
• Reporter: Zoltán Borók-Nagy
• Created: 27/Aug/21 16:27
• Updated: 12/Jan/23 23:43
• Resolved: 12/Jan/23 23:43

Description

With Iceberg V1 we cannot retrieve the old schema of a snapshot. But V2 will have this functionality:

https://github.com/apache/iceberg/issues/1029

So it would make sense to use the old snapshot's table schema during a time travel query.

Interestingly MS SQL SERVER also queries temporal tables with current table schema.