http://www.perlmonks.org?node_id=616876


in reply to Fishing for constraint => SQL designs

Did you look at DBIx::Perlish? The DSL it introduces is the perl itself, similar to Tangram's perl expressions, but implemented by parsing of perl optree (rather than operator overloading), and therefore much more flexible. I don't think it covers everything you named as the ideal solution, but still.