From bbb153b9e576cdfdb59711f68d7f26a427a55041 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 12 Jan 2012 09:28:06 +0200
Subject: Query support for SQL Server

---
 odb/mssql/statement.hxx | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

(limited to 'odb/mssql/statement.hxx')

diff --git a/odb/mssql/statement.hxx b/odb/mssql/statement.hxx
index 15e64a0..3bea55f 100644
--- a/odb/mssql/statement.hxx
+++ b/odb/mssql/statement.hxx
@@ -60,8 +60,18 @@ namespace odb
       SQLRETURN
       execute ();
 
+      // The old_base and new_base arguments can be used to "re-base"
+      // the long_callback struct pointer (stored in bind::buffer).
+      // This is used by the query machinery to cause stream_result()
+      // to use the callback information from a copy of the image
+      // instead of the bound image.
+      //
       void
-      stream_result (bind*, std::size_t start, std::size_t count);
+      stream_result (bind*,
+                     std::size_t start,
+                     std::size_t count,
+                     void* old_base = 0,
+                     void* new_base = 0);
 
     protected:
       connection& conn_;
@@ -113,10 +123,14 @@ namespace odb
       fetch ();
 
       void
-      stream_result ()
+      stream_result (void* old_base = 0, void* new_base = 0)
       {
         if (first_long_ != result_.count)
-          statement::stream_result (result_.bind, first_long_, result_.count);
+          statement::stream_result (result_.bind,
+                                    first_long_,
+                                    result_.count,
+                                    old_base,
+                                    new_base);
       }
 
       void
-- 
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