From b18a536194c8a9a6781f3d0acfad516c6bf5a113 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Thu, 14 Jul 2011 00:28:04 +0000
Subject: [PATCH] apply patch from stella for faster sqlite reads - closes #797

---
 CHANGELOG                             | 2 ++
 plugins/input/sqlite/sqlite_types.hpp | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG b/CHANGELOG
index 828a9afe8..4ba14c540 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -14,6 +14,8 @@ For a complete change history, see the SVN log.
 Mapnik Trunk
 ------------
 
+- SQLite Plugin: optimize io using shared cache and no mutexes (#797)
+
 - Directly link input plugins to libmapnik to avoid having to set dlopen flags from binding languages (#790)
 
 - Throw an error during registration for fonts which Freetype2 does not report a family or style name (r2985).
diff --git a/plugins/input/sqlite/sqlite_types.hpp b/plugins/input/sqlite/sqlite_types.hpp
index 9e8c25cdb..47de9ba34 100644
--- a/plugins/input/sqlite/sqlite_types.hpp
+++ b/plugins/input/sqlite/sqlite_types.hpp
@@ -122,7 +122,8 @@ public:
     sqlite_connection (const std::string& file)
         : db_(0)
     {
-        if (sqlite3_open (file.c_str(), &db_))
+        sqlite3_enable_shared_cache(1);
+        if (sqlite3_open_v2 (file.c_str(), &db_, SQLITE_OPEN_NOMUTEX|SQLITE_OPEN_SHAREDCACHE, 0))
         {
             std::ostringstream s;
             s << "Sqlite Plugin: ";