// 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);
});
}
