private bool CanGenerateColumnar()
{
var typeOfTOuterKey = typeof(TOuterKey);
var typeOfTInnerKey = typeof(TInnerKey);
var typeOfTResult = typeof(TResult);
if (!typeOfTResult.CanRepresentAsColumnar())
{
return(false);
}
if (typeOfTOuterKey.GetPartitionType() != null)
{
return(false);
}
if (typeOfTInnerKey.GetPartitionType() != null)
{
return(false);
}
// For now, restrict the inner key to be anything other than an anonymous type since those can't be ungrouped without using reflection.
if (typeOfTInnerKey.IsAnonymousType())
{
return(false);
}
var lookupKey = CacheKey.Create(ResultSelector.ExpressionToCSharp());
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => UngroupTemplate.Generate <TOuterKey, TInnerKey, TInnerResult, TResult>(ResultSelector));
errorMessages = generatedPipeType.Item2;
return(generatedPipeType.Item1 != null);
}
private IStreamObserver <CompoundGroupKey <TOuterKey, TInnerKey>, TInnerResult> GetPipe(IStreamObserver <TOuterKey, TResult> observer)
{
var lookupKey = CacheKey.Create(ResultSelector.ExpressionToCSharp());
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => UngroupTemplate.Generate <TOuterKey, TInnerKey, TInnerResult, TResult>(ResultSelector));
Func <PlanNode, IQueryObject, PlanNode> planNode = ((PlanNode p, IQueryObject o) => new UngroupPlanNode(
p,
o,
typeof(CompoundGroupKey <TOuterKey, TInnerKey>),
typeof(TOuterKey),
typeof(TInnerResult),
typeof(TResult),
ResultSelector,
true,
generatedPipeType.Item2));
var instance = Activator.CreateInstance(generatedPipeType.Item1, this, observer, planNode);
var returnValue = (IStreamObserver <CompoundGroupKey <TOuterKey, TInnerKey>, TInnerResult>)instance;
return(returnValue);
}
