From ffedfde75e9f97f2ceb9b4bb9d633b9e86b88535 Mon Sep 17 00:00:00 2001
From: Petr Pridal <petr.pridal@klokantech.com>
Date: Wed, 12 Aug 2015 18:01:28 +0200
Subject: [PATCH] Faster check for grids in large mbtiles file. Issue #51.

---
 tileserver.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tileserver.php b/tileserver.php
index 55f7d27..970dd7c 100644
--- a/tileserver.php
+++ b/tileserver.php
@@ -545,7 +545,7 @@ class Json extends Server {
     $metadata['tiles'] = $tiles;
     if ($this->isDBLayer($metadata['basename'])) {
       $this->DBconnect($metadata['basename'] . '.mbtiles');
-      $res = $this->db->query('SELECT grid FROM grids LIMIT 1');
+      $res = $this->db->query('SELECT name FROM sqlite_master WHERE name="grids";');
       if ($res) {
         foreach ($this->config['baseUrls'] as $url) {
           $grids[] = '' . $this->config['protocol'] . '://' . $url . '/' . $metadata['basename'] . '/{z}/{x}/{y}.grid.json';