如何在Kotlin Exposed中实现表继承？

open class PersonTable: IntIdTable() {
    val name = varchar("name", 50)
}

class EmployeeTable: PersonTable() {
    val position = varchar("position", 50)
}

class StudentTable: PersonTable() {
    val school = varchar("school", 50)
}

transaction {
    SchemaUtils.create(PersonTable, EmployeeTable, StudentTable)
}

transaction {
    val personId = PersonTable.insertAndGetId {
        it[name] = "John Doe"
    }
    
    EmployeeTable.insert {
        it[id] = personId
        it[position] = "Developer"
    }
    
    StudentTable.insert {
        it[id] = personId
        it[school] = "ABC University"
    }
}

transaction {
    (PersonTable innerJoin EmployeeTable)
        .slice(PersonTable.name, EmployeeTable.position)
        .selectAll()
        .forEach { row ->
            val name = row[PersonTable.name]
            val position = row[EmployeeTable.position]
            println("Name: $name, Position: $position")
        }
}