From 31fd2870497686667f20b2d43467a07482f8ab40 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 10 Sep 2013 14:10:45 +0200
Subject: Schema versioning support

---
 odb/sqlite/statement-cache.txx | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'odb/sqlite/statement-cache.txx')

diff --git a/odb/sqlite/statement-cache.txx b/odb/sqlite/statement-cache.txx
index 4c6e3cd..8d8e358 100644
--- a/odb/sqlite/statement-cache.txx
+++ b/odb/sqlite/statement-cache.txx
@@ -2,6 +2,8 @@
 // copyright : Copyright (c) 2005-2013 Code Synthesis Tools CC
 // license   : GNU GPL v2; see accompanying LICENSE file
 
+#include <odb/sqlite/database.hxx>
+
 namespace odb
 {
   namespace sqlite
@@ -15,6 +17,16 @@ namespace odb
       typename object_traits_impl<T, id_sqlite>::statements_type
       statements_type;
 
+      // Clear the cache if the database version has changed. This
+      // makes sure we don't re-use statements that correspond to
+      // the old schema.
+      //
+      if (version_seq_ != conn_.database ().schema_version_sequence ())
+      {
+        map_.clear ();
+        version_seq_ = conn_.database ().schema_version_sequence ();
+      }
+
       map::iterator i (map_.find (&typeid (T)));
 
       if (i != map_.end ())
@@ -31,6 +43,9 @@ namespace odb
     view_statements<T>& statement_cache::
     find_view ()
     {
+      // We don't cache any statements for views so no need to clear
+      // the cache.
+
       map::iterator i (map_.find (&typeid (T)));
 
       if (i != map_.end ())
-- 
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