public Aggregation(AggregationJson json, Schema schema)
{
Function = json.Function;
Column = schema.GetColumn(json.Column);
Filters = Filter.Load(json.Filters, schema);
}
public Filter(FilterJson json, Schema schema)
: this(schema.GetColumn(json.Column), json.Operator, UnpackValue(json.Value))
{
}
public Ordering(OrderingJson json, Schema schema)
: this(schema.GetColumn(json.Column), json.Descending)
{
}