tomtongue commented on PR #8227:
URL: https://github.com/apache/iceberg/pull/8227#issuecomment-1671157935

   > > However, some catalogs such as Glue Data Catalog only accept lowercase 
as its table name, and this renaming operation in the migrate procedure would 
be a blocker for running the migrate.
   > 
   > I think @jackye1995 @amogh-jahagirdar @singhpk234 have more knowledge 
about this.
   
   Let me add my thoughts. 
   As described above, the current migrate keeps the source Spark table as a 
backup table with `<src_table>_BACKUP_`. This would causes the Iceberg 
validation exception if Glue Data Catalog impl in Iceberg handles such as table.
   And, the backup table can be kept without dropping the table. This would be 
possible to occur the table name conflication. 
   
   The ability to specify the backup table name should be necessary to expand 
the capability and avoid the name confliction. Therefore I submitted this PR.


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