Base result types

api/src/main/java/org/apache/iceberg/actions/ExpireSnapshots.java

@@ -118,5 +118,9 @@ interface Result {
     default long deletedStatisticsFilesCount() {
       return 0L;
     }
+
+    default long deletedFilesSizeInBytes() {
+      return 0L;
+    }
   }
 }

core/src/main/java/org/apache/iceberg/actions/BaseExpireSnapshots.java

@@ -35,5 +35,11 @@ interface Result extends ExpireSnapshots.Result {
     default long deletedStatisticsFilesCount() {
       return ExpireSnapshots.Result.super.deletedStatisticsFilesCount();
     }
+
+    @Override
+    @Value.Default
+    default long deletedFilesSizeInBytes() {
+      return ExpireSnapshots.Result.super.deletedFilesSizeInBytes();
+    }
   }
 }

spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/actions/ExpireSnapshotsSparkAction.java

@@ -265,6 +265,7 @@ private ExpireSnapshots.Result deleteFiles(Iterator<FileInfo> files) {
         .deletedManifestsCount(summary.manifestsCount())
         .deletedManifestListsCount(summary.manifestListsCount())
         .deletedStatisticsFilesCount(summary.statisticsFilesCount())
+        .deletedFilesSizeInBytes(summary.totalSizeInBytes())
         .build();
   }
 }

spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/procedures/ExpireSnapshotsProcedure.java

@@ -69,7 +69,8 @@ public class ExpireSnapshotsProcedure extends BaseProcedure {
             new StructField(
                 "deleted_manifest_lists_count", DataTypes.LongType, true, Metadata.empty()),
             new StructField(
-                "deleted_statistics_files_count", DataTypes.LongType, true, Metadata.empty())
+                "deleted_statistics_files_count", DataTypes.LongType, true, Metadata.empty()),
+            new StructField("deleted_files_size_bytes", DataTypes.LongType, true, Metadata.empty())
           });
 
   public static ProcedureBuilder builder() {
@@ -162,7 +163,8 @@ private InternalRow[] toOutputRows(ExpireSnapshots.Result result) {
             result.deletedEqualityDeleteFilesCount(),
             result.deletedManifestsCount(),
             result.deletedManifestListsCount(),
-            result.deletedStatisticsFilesCount());
+            result.deletedStatisticsFilesCount(),
+            result.deletedFilesSizeInBytes());
     return new InternalRow[] {row};
   }