In operator.go there are a number of functions including ScalarOperatorTransmitsNulls, BoolOperatorRequiresNotNullArgs, AggregateIgnoresNulls, AggregateIsNullOnEmpty, AggregateIsNeverNullOnNonNullInput, AggregateIsNeverNull, AggregatesCanMerge, and AggregateIgnoresDuplicates that serve as facts about di

Currently, the JDBC string containing the host name and port is hardcoded. For example, consider the connection string for MySQL:

https://github.com/sqlancer/sqlancer/blob/e62224edcb43fe421dc87601f75090739e34e595/src/sqlancer/mysql/MySQLProvider.java#L248

It would be desirable to make this configurable. We could provide an option to set the JDBC string for each DBMS. For example, for MySQL,