From 9715f388db714fb663b854883e4cad5f2aa3c860 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 2 Sep 2013 08:33:25 +0200
Subject: Support for versioning simple value in object

---
 odb/pgsql/statement-cache.txx | 13 +++++++++++++
 1 file changed, 13 insertions(+)

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

diff --git a/odb/pgsql/statement-cache.txx b/odb/pgsql/statement-cache.txx
index 1a35d38..48bc9da 100644
--- a/odb/pgsql/statement-cache.txx
+++ b/odb/pgsql/statement-cache.txx
@@ -15,6 +15,16 @@ namespace odb
       typename object_traits_impl<T, id_pgsql>::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 +41,9 @@ 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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