From e0a825658da5bdbfc41e6b0ac965342f424db2c6 Mon Sep 17 00:00:00 2001
From: Joas Schilling <coding@schilljs.com>
Date: Tue, 16 Apr 2019 11:43:12 +0200
Subject: [PATCH] Allow to use Subqueries in from

Signed-off-by: Joas Schilling <coding@schilljs.com>
---
 lib/private/DB/QueryBuilder/QueryBuilder.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/private/DB/QueryBuilder/QueryBuilder.php b/lib/private/DB/QueryBuilder/QueryBuilder.php
index ebbcdeb087..25d59fb7d7 100644
--- a/lib/private/DB/QueryBuilder/QueryBuilder.php
+++ b/lib/private/DB/QueryBuilder/QueryBuilder.php
@@ -1170,6 +1170,10 @@ class QueryBuilder implements IQueryBuilder {
 	 * @return string
 	 */
 	public function getTableName($table) {
+		if ($table instanceof IQueryFunction) {
+			return (string) $table;
+		}
+
 		$table = $this->prefixTableName($table);
 		return $this->helper->quoteColumnName($table);
 	}