protected override Provider VisitFilter(FilterProvider provider)
{
mappings[provider.Source] = Merge(mappings[provider], mappingsGatherer.Gather(provider.Predicate));
var newSourceProvider = VisitCompilable(provider.Source);
mappings[provider] = mappings[provider.Source];
var predicate = TranslateLambda(provider, provider.Predicate);
return(newSourceProvider == provider.Source && predicate == provider.Predicate
? provider
: new FilterProvider(newSourceProvider, (Expression <Func <Tuple, bool> >)predicate));
}
public bool TryAddFilter(FilterProvider filter)
{
var tupleAccesses = tupleGatherer.Gather(filter.Predicate);
if (tupleAccesses.Count == 0)
{
return(false);
}
return(TryAddCalculateFilter(filter, tupleAccesses));
}
// Constructors
protected ColumnMappingInspector(CompilableProvider originalProvider)
{
rootProvider = originalProvider;
mappings = new Dictionary <Provider, List <int> >();
outerColumnUsages = new Dictionary <ApplyParameter, List <int> >();
mappingsGatherer = new TupleAccessGatherer((a, b) => { });
var outerMappingsGatherer = new TupleAccessGatherer(RegisterOuterMapping);
outerColumnUsageVisitor = new CompilableProviderVisitor((_, e) => {
outerMappingsGatherer.Gather(e);
return(e);
});
}