1 files changed, 40 insertions, 0 deletions
diff --git a/lib/private/db/pgsqltools.php b/lib/private/db/pgsqltools.php
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+++ b/lib/private/db/pgsqltools.php
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+<?php
+/**
+ * Copyright (c) 2013 Bart Visscher <bartv@thisnet.nl>
+ * Copyright (c) 2014 Andreas Fischer <bantu@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OC\DB;
+
+/**
+* Various PostgreSQL specific helper functions.
+*/
+class PgSqlTools {
+	/**
+	* @brief Resynchronizes all sequences of a database after using INSERTs
+	*        without leaving out the auto-incremented column.
+	* @param \OC\DB\Connection $conn
+	* @return null
+	*/
+	public function resynchronizeDatabaseSequences(Connection $conn) {
+		$databaseName = $conn->getDatabase();
+		foreach ($conn->getSchemaManager()->listSequences() as $sequence) {
+			$sequenceName = $sequence->getName();
+			$sqlInfo = 'SELECT table_schema, table_name, column_name
+				FROM information_schema.columns
+				WHERE column_default = ? AND table_catalog = ?';
+			$sequenceInfo = $conn->fetchAssoc($sqlInfo, array(
+				"nextval('$sequenceName'::regclass)",
+				$databaseName
+			));
+			$tableName = $sequenceInfo['table_name'];
+			$columnName = $sequenceInfo['column_name'];
+			$sqlMaxId = "SELECT MAX($columnName) FROM $tableName";
+			$sqlSetval = "SELECT setval('$sequenceName', ($sqlMaxId))";
+			$conn->executeQuery($sqlSetval);
+		}
+	}
+}