hantangwangd opened a new issue, #10927:
URL: https://github.com/apache/iceberg/issues/10927

   ### Query engine
   
   N/A
   
   ### Question
   
   Referring to: https://iceberg.apache.org/spec/#manifests, iceberg spec about 
`manifests` defines that, a manifest file must store the partition spec and 
other metadata as properties in the Avro file's key-value metadata. Among these 
key-value metadata, `schema-id` has changed from `optional` to `required` in v2 
metadata.
   
   However, in any implementation version of `ManifestWriter`, we did not write 
`schema-id` into the metadata of the corresponding Avro file. This looks 
inconsistent with the spec. And furthermore, seems there is not need to write 
this key-value property as it is not used anywhere. So should we fix this 
inconsistency? Or did I misunderstand something?


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