I have been wondering recently about the possibility of having a
common SQL parser for the Firebird engine and GPRE. Over time the SQL
supported by the engine and that supported by GPRE have been
diverging. I have made a few small efforts to hack support for the
features that I need into GPRE but GPRE is difficult to maintain (at
least for me) and it seems silly to have two distinctly different SQL
parsers for the same product anyway.

Has anyone else given this any thought? What would be involved in
doing something like this?

It would be nice if keeping GPRE in sync with the rest of the product
were made easier.