hello, you can take as a starting point this PR for example :
https://issues.apache.org/jira/browse/IGNITE-13547
Hello Calcite developers,
I am trying to add custom types to the Calcite parser. From what I know,
it
seems that I need configure a config.fmpp file, modify Parser.jj, and run
FMPP and JavaCC on them to create a custom parser (with a build system
like
the one for the Babel parser). However, we use sbt as our build system,
whose ecosystem lacks adequate substitutes for the Gradle plugins that
the
Calcite project uses to generate its parser. Before I go and write these
plugins myself, I want to ask the mailing list whether there is an easier
way to add custom types when using sbt.
Thanks for your time,
Tej Qu Nair
