ad hoc query builder

Hi All,

Does anybody know of a plugin, gem, component, sample app, whatever,
running with AR, that allows a user to define ad hoc queries by
selecting the columns they want to see, ability to define filters using
and/or semantics, select columns for ordering and grouping... ?



We have such solution as ActiveX and ASP.NET control:
You can see how it works on the special demo page:

Unfortunately our product does not work with Ruby.

With the best regards, Sergiy,