singhpk234 commented on code in PR #13879:
URL: https://github.com/apache/iceberg/pull/13879#discussion_r3624268815


##########
open-api/rest-catalog-open-api.yaml:
##########
@@ -3260,6 +3260,71 @@ components:
           additionalProperties:
             type: string
 
+    ReadRestrictions:
+      type: object
+      description: >
+          Read restrictions for a table, including projection and row filter 
expressions, according to the current schema.
+
+          A client MUST enforce the restrictions defined in this object when 
reading data
+          from the table.
+
+          These restrictions apply only to the authenticated principal, user, 
or account

Review Comment:
   Thanks @sungwy !
   
   > function of the table's commit state and the client identity. 
ReadRestrictions adds a new axis of cardinality: they're evaluated per end-user 
subject that the trusted client propagates
   
   I am not sure if i understand the difference between identity and subject 
here, what ever inputs were used for vended creds will be the same used for 
computing the ReadRestrictions, we don't define whats the inputs taken to the 
compute the vended creds either ways. 



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