Hey guys. Dunno if I'm just stupid. But lets say i...

# exposed

[Gustav Elmgren]

Hey guys. Dunno if I'm just stupid. But lets say i have a val price = double("price") in a table object. And then I do something like:

val test = TableObj.price.avg()

Should test not be assignable to Function<BigDecimal> ? Given it's type is Avg<Double, Double> and Avg implements Function?

fun <T : Comparable<T>, S : T?> ExpressionWithColumnType<in S>.avg(scale: Int = 2): Avg<T, S> = Avg<T, S>(this, scale)

class Avg<T : Comparable<T>, in S : T?>(
    /** Returns the expression from which the average is calculated. */
    val expr: Expression<in S>,
    scale: Int
) : Function<BigDecimal?>(DecimalColumnType(Int.MAX_VALUE, scale)) {
    override fun toQueryBuilder(queryBuilder: QueryBuilder): Unit = queryBuilder { append("AVG(", expr, ")") }
}

[Chantal Loncle]

You're correct in that Avg() extending the abstract class Function means any of the following works:

val test1: Avg<Double, Double> = TableObj.price.avg()
val test2: Function<BigDecimal?> = TableObj.price.avg()
val test3 = TableObj.price.avg() as Function<BigDecimal?>

But Function<BigDecimal?> would be required, with a nullable type argument.