sepgsql DROP support.

KaiGai Kohei

contrib/sepgsql/schema.c

@@ -96,6 +96,33 @@ sepgsql_schema_post_create(Oid namespaceId)
 	pfree(tcontext);
 }
 
+/*
+ * sepgsql_schema_drop
+ *
+ * It checks privileges to drop the supplied schema object.
+ */
+void
+sepgsql_schema_drop(Oid namespaceId)
+{
+	ObjectAddress	object;
+	char		   *audit_name;
+
+	/*
+	 * check db_schema:{drop} permission
+	 */
+	object.classId = NamespaceRelationId;
+	object.objectId = namespaceId;
+	object.objectSubId = 0;
+	audit_name = getObjectDescription(&object);
+
+	sepgsql_avc_check_perms(&object,
+                            SEPG_CLASS_DB_SCHEMA,
+							SEPG_DB_SCHEMA__DROP,
+							audit_name,
+							true);
+	pfree(audit_name);
+}
+
 /*
  * sepgsql_schema_relabel
  *