Add odb::connection class

This abstract class represents a connection to the database. One can
use it to start a transaction or to execute a native statement out
of a transaction.

Before we had concrete connection classes in the database runtime
libraries (e.g., odb::mysql::connection). Now these classes derive
from odb::connection.

1 files changed, 10 insertions, 11 deletions

diff --git a/odb/pgsql/database.hxx b/odb/pgsql/database.hxx
index b4917cc..d3d8f7d 100644
--- a/odb/pgsql/database.hxx
+++ b/odb/pgsql/database.hxx
@@ -20,7 +20,6 @@
 #include <odb/pgsql/forward.hxx>
 #include <odb/pgsql/connection.hxx>
 #include <odb/pgsql/connection-factory.hxx>
-#include <odb/pgsql/transaction-impl.hxx>
 
 #include <odb/pgsql/details/export.hxx>
 
@@ -28,12 +27,11 @@ namespace odb
 {
   namespace pgsql
   {
+    class transaction_impl;
+
     class LIBODB_PGSQL_EXPORT database: public odb::database
     {
     public:
-      typedef pgsql::connection connection_type;
-
-    public:
       database (const std::string& user,
                 const std::string& password,
                 const std::string& db,
@@ -82,23 +80,24 @@ namespace odb
       static void
       print_usage (std::ostream&);
 
+      // Transactions.
+      //
     public:
-      using odb::database::execute;
-      virtual unsigned long long
-      execute (const char* statement, std::size_t length);
-
-    public:
-      virtual transaction_impl*
+      transaction_impl*
       begin ();
 
     public:
-      details::shared_ptr<connection_type>
+      connection_ptr
       connection ();
 
     public:
       virtual
       ~database ();
 
+    protected:
+      virtual odb::connection*
+      connection_ ();
+
     public:
       const std::string&
       user () const