private UnaryPipe <TKey, TPayload, TPayload> GetPipe(IStreamObserver <TKey, TPayload> observer)
{
var lookupKey = CacheKey.Create(this.Predicate.ExpressionToCSharp());
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => WhereTemplate.Generate(this));
Func <PlanNode, IQueryObject, PlanNode> planNode = ((PlanNode p, IQueryObject o) => new WherePlanNode(p, o, typeof(TKey), typeof(TPayload), this.Predicate, true, generatedPipeType.Item2));
var instance = Activator.CreateInstance(generatedPipeType.Item1, this, observer, planNode);
var returnValue = (UnaryPipe <TKey, TPayload, TPayload>)instance;
return(returnValue);
}
protected override bool CanGenerateColumnar()
{
var typeOfTKey = typeof(TKey);
var typeOfTSource = typeof(TPayload);
if (!typeOfTSource.CanRepresentAsColumnar())
{
return(false);
}
if (typeOfTKey.GetPartitionType() != null)
{
return(false);
}
var lookupKey = CacheKey.Create(this.Predicate.ExpressionToCSharp());
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => WhereTemplate.Generate(this));
this.errorMessages = generatedPipeType.Item2;
return(generatedPipeType.Item1 != null);
}
