InterSystems now publishes driver to the maven central repository, so instead of github repo, should be used this for maven

<dependency>
    <groupId>com.intersystems</groupId>
    <artifactId>intersystems-jdbc</artifactId>
    <version>3.10.5</version>
</dependency>

or in gradle

implementation("com.intersystems:intersystems-jdbc:3.10.5")

It does not look like that my implementation will be even approved for the contest.

I may need to find a better idea to implement for the contest, while it's extended

Still don't see any issues with $select, that look like Analyzer issue