I really didn't expect that one to work out of the box, but just managed

to get NHibernate + MySQL + Assets working.

OpenSim/Data/NHibernate/Resources/MySQLDialect/001_AssetStore.sql

@@ -0,0 +1,14 @@
+START TRANSACTION;
+
+create table Assets(
+       ID varchar(36) not null primary key,
+       Type int default 0,
+       InvType int default 0,
+       Name varchar(64),
+       Description varchar(64),
+       Local boolean,
+       Temporary boolean,
+       Data blob
+);
+
+COMMIT;