Add support for transaction multiplexing

Also delay getting a connection until after we do all the sanity
checks (e.g., that there is no active transaction). Otherwise we
are running risk of getting blocked rather than throwing an
exception.

1 files changed, 6 insertions, 0 deletions

diff --git a/odb/mysql/database.cxx b/odb/mysql/database.cxx
index dc78bce..d37351f 100644
--- a/odb/mysql/database.cxx
+++ b/odb/mysql/database.cxx
@@ -208,6 +208,12 @@ namespace odb
       details::options::print_usage (os);
     }
 
+    transaction_impl* database::
+    begin ()
+    {
+      return new transaction_impl (*this);
+    }
+
     odb::connection* database::
     connection_ ()
     {