szehon-ho opened a new issue, #6991:
URL: https://github.com/apache/iceberg/issues/6991

   ### Feature Request / Improvement
   
   Metadata tables support time travel.  Ref:
   
   https://github.com/apache/iceberg/pull/1508 implemented using the correct 
schema for time-travel (schema at time of time travel).  This broke time travel 
for metadata tables , of tables with multiple schemas, because metadata tables 
have only one schema.  A fix is made to always use current schema for metadata 
tables no matter time-travel or not: 
https://github.com/apache/iceberg/pull/6980.
   
   However, I suggest to implement this feature for metadata tables, whose 
schema are dependeng upon schema of parent tables.  For example, files table 
readable_metrics column is dependent on parent table's schema, for which column 
it shows.  It would be great to have time-travel work correctly with this, by 
making files table schema reflect parent table schema at time of time travel.
   
   ### Query engine
   
   None


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