AFAIK, no one is using this for long-term storage and no one is expecting the format to stable. That said, I personally would be open to the idea of stabilizing the format. Given the format is fairly simple, one approach would be to use something like JSON Schema and then have some tests to validate that the output corresponds to the schema.
-- Michael Mior [email protected] Le jeu. 31 mai 2018 à 11:09, Marc Prud'hommeaux <[email protected]> a écrit : > > I am developing an application that allows end users to interactively > construct and execute relational expressions that span multiple data > sources using Calcite. My current implementation utilizes my own relational > algebra JSON format which I then convert to a RelNode using a RelBuilder. > It would vastly simplify my project if I could just use Calcite's own > RelJson format to construct and persist relational expressions, but I am > concerned that the format is both undocumented, and, aside from > RelWriterTest.java, does not have much in the way of future guarantees that > the format will remain stable. > > Is the RelJson format intended the be used for long-term storage? Are > there any known applications that are using this as a serialization format > for their relational expressions? > > If the consensus is that this format should be stable, then I can do some > work towards documenting it, as well as implementing some additional test > cases to ensure that RelNodes that are round-tripped through JSON > serialization maintain fidelity. > > -Marc > >
