From e00d344ba8a01f2b1d7d1e01abd2f1d44b91ede1 Mon Sep 17 00:00:00 2001
From: Matthias Schmidt <gravatronics@live.com>
Date: Sun, 29 Sep 2019 19:16:22 +0200
Subject: [PATCH] Add PartialDatabaseTable

Close #3081
---
 .../table/DatabaseTableChangeProcessor.class.php  |  4 ++++
 .../database/table/PartialDatabaseTable.class.php | 15 +++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 wcfsetup/install/files/lib/system/database/table/PartialDatabaseTable.class.php

diff --git a/wcfsetup/install/files/lib/system/database/table/DatabaseTableChangeProcessor.class.php b/wcfsetup/install/files/lib/system/database/table/DatabaseTableChangeProcessor.class.php
index 3672aba3c4..6a0edd586f 100644
--- a/wcfsetup/install/files/lib/system/database/table/DatabaseTableChangeProcessor.class.php
+++ b/wcfsetup/install/files/lib/system/database/table/DatabaseTableChangeProcessor.class.php
@@ -373,6 +373,10 @@ class DatabaseTableChangeProcessor {
 				}
 			}
 			else if (!in_array($tableName, $this->existingTableNames)) {
+				if ($table instanceof PartialDatabaseTable) {
+					throw new \LogicException("Partial table '{$tableName}' cannot be created.");
+				}
+				
 				$this->tablesToCreate[] = $table;
 				
 				$this->splitNodeMessage .= "Created table '{$tableName}'.";
diff --git a/wcfsetup/install/files/lib/system/database/table/PartialDatabaseTable.class.php b/wcfsetup/install/files/lib/system/database/table/PartialDatabaseTable.class.php
new file mode 100644
index 0000000000..3430d18cc7
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/database/table/PartialDatabaseTable.class.php
@@ -0,0 +1,15 @@
+<?php
+namespace wcf\system\database\table;
+
+/**
+ * PHP representation of layout changes to an existing database table.
+ * 
+ * Trying to create a table represented by this class causes an exception.
+ * 
+ * @author	Matthias Schmidt
+ * @copyright	2001-2019 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @package	WoltLabSuite\Core\System\Database\Table
+ * @since	5.2
+ */
+class PartialDatabaseTable extends DatabaseTable {}
-- 
2.20.1