nhibernate - How to use bitwise operators in HQL? -

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In HQL, how can I use bitwise operators? 

  Select RoleId, RoleName, RolePerms WHERE (RolePerms and @Parameter) = @Parameter

But, writing this HQL

< Choose from pre> role where (rollprom and param) =: param

gives me this error: NHibernate.Hql Ast.antLR.QuerySyntaxException: 'Antlr The exception of type 'Runtime.NoViableAltException' was thrown.

I got a solution to this: HLL works like this: 

  Select from role r where r.Permissions & param: & gt; 0

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