roryqi commented on code in PR #12225:
URL: https://github.com/apache/gravitino/pull/12225#discussion_r3675137197


##########
iceberg/iceberg-rest-server/src/main/java/org/apache/gravitino/iceberg/service/deletion/IcebergDeletionAuthorization.java:
##########
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.gravitino.iceberg.service.deletion;
+
+import javax.annotation.Nullable;
+import org.apache.gravitino.Entity;
+import org.apache.gravitino.NameIdentifier;
+import 
org.apache.gravitino.iceberg.service.authorization.IcebergRESTServerContext;
+import org.apache.gravitino.server.authorization.MetadataAuthzHelper;
+import 
org.apache.gravitino.server.authorization.expression.AuthorizationExpressionConstants;
+import org.apache.gravitino.storage.relational.service.TableDeletionService;
+import org.apache.gravitino.utils.PrincipalUtils;
+
+/** Authorization bridge for operations on a retained table deletion 
generation. */
+public final class IcebergDeletionAuthorization {
+
+  private static final String REQUIRED_PARENT_USE = "ANY_USE_CATALOG && 
ANY_USE_SCHEMA";
+
+  private IcebergDeletionAuthorization() {}
+
+  /**
+   * Checks current {@code DROP_TABLE} semantics against a live or retained 
table generation.
+   *
+   * <p>The retained-owner fallback is fenced by the immutable table ID and 
deletion ID, and still
+   * requires current parent-use privileges.
+   *
+   * @param identifier full Gravitino table identifier
+   * @param deletion exact retained root and action, or {@code null} for a 
live or missing table
+   * @return whether the current principal may manage the deletion
+   */
+  public static boolean canDrop(

Review Comment:
   Why do we need to check permission here? Usually, we check it in the 
IncepterService.



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