Thank you very much to the calcite community for raising these questions. This is what I have been doubting. I am very sorry that this doubt has been discussed for so long.
Maybe we also need to consider another issue, that is, the database version issue. Versions like mysql and postgres are very stable, but components like spark still seem to have function bugs. exists, then how should we consider version issues? I don't know what I can do. Recently I am sorting out some documents about the use of some functions of mysql and postgres in calcite. I don't know if this is helpful. Best wishes, Cancai Cai
