public override string ToString()
{
var translator = new BigQueryTranslateVisitor();
var orderByBuilder = new List <string>();
FullWindowFunction <TSource, TResult, TPartitionKey> self = this;
while (self.parent != null)
{
orderByBuilder.Add(translator.VisitAndClearBuffer(self.orderKeySelector) + (self.isDescending ? " DESC" : ""));
self = self.parent;
}
orderByBuilder.Add(translator.VisitAndClearBuffer(self.orderKeySelector) + (self.isDescending ? " DESC" : ""));
orderByBuilder.Reverse();
if (self.partitionKeySelector != null)
{
var expr1 = translator.VisitAndClearBuffer(self.partitionKeySelector);
var expr2 = string.Join(", ", orderByBuilder);
var s = string.Format("{0}({1}) OVER (PARTITION BY {2} ORDER BY {3})", self.methodName, self.argument, expr1, expr2);
return(s);
}
else
{
var expr2 = string.Join(", ", orderByBuilder);
var s = string.Format("{0}({1}) OVER (ORDER BY {2})", self.methodName, self.argument, expr2);
return(s);
}
}
internal FullWindowFunction(string methodName, string argument, Expression <Func <TSource, TPartitionKey> > partitionKeySelector, /* Expression<Func<TSource, TOrderKey>> */ Expression orderKeySelector, bool isDescending)
{
this.methodName = methodName;
this.argument = argument;
this.partitionKeySelector = partitionKeySelector;
this.orderKeySelector = orderKeySelector;
this.isDescending = isDescending;
this.parent = null;
}
internal FullWindowFunction(FullWindowFunction <TSource, TResult, TPartitionKey> parent, Expression orderKeySelector, bool isDescending)
{
this.parent = parent;
this.orderKeySelector = orderKeySelector;
this.isDescending = isDescending;
}