[Schema]
val schema = Frameworks.createRootSchema(false)
val playersType = RelDataTypeFactory.Builder(typeFactory)
.add("id", SqlTypeName.INTEGER)
.add("fname", SqlTypeName.VARCHAR)
.add("lname", SqlTypeName.VARCHAR)
.add("age", SqlTypeName.DOUBLE)
.add("weight", SqlTypeName.DOUBLE)
.add("height", SqlTypeName.DOUBLE)