Add support for SQL statement tracing

1 files changed, 20 insertions, 3 deletions

diff --git a/odb/database.hxx b/odb/database.hxx
index c7816f6..e9c44f2 100644
--- a/odb/database.hxx
+++ b/odb/database.hxx
@@ -205,9 +205,27 @@ namespace odb
     connection_ptr
     connection ();
 
+    // SQL statement tracing.
+    //
+  public:
+    typedef odb::tracer tracer_type;
+
+    void
+    tracer (tracer_type&);
+
+    void
+    tracer (tracer_type*);
+
+    tracer_type*
+    tracer () const;
+
   protected:
     database ();
 
+  private:
+    database (const database&);
+    database& operator= (const database&);
+
   protected:
     typedef odb::connection connection_type;
 
@@ -230,9 +248,8 @@ namespace odb
     template <typename T, class_kind kind>
     struct query_;
 
-  private:
-    database (const database&);
-    database& operator= (const database&);
+  protected:
+    tracer_type* tracer_;
   };
 }