kbendick commented on a change in pull request #2921:
URL: https://github.com/apache/iceberg/pull/2921#discussion_r683760308



##########
File path: 
spark3/src/main/java/org/apache/iceberg/spark/procedures/ExpireSnapshotsProcedure.java
##########
@@ -42,7 +44,8 @@
   private static final ProcedureParameter[] PARAMETERS = new 
ProcedureParameter[] {
       ProcedureParameter.required("table", DataTypes.StringType),
       ProcedureParameter.optional("older_than", DataTypes.TimestampType),
-      ProcedureParameter.optional("retain_last", DataTypes.IntegerType)
+      ProcedureParameter.optional("retain_last", DataTypes.IntegerType),
+      ProcedureParameter.optional("num_parallelism", DataTypes.IntegerType)

Review comment:
       Nit (non-blocking): This parameter name is a bit confusing for me. 
Perhaps simply `num_threads` would do? It is indeed difficult to think of a 
name that does not evoke the normal spark task parallelism. Maybe even just 
`parallelism` would do?




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