public IRowCursor CreateCursor(IChannelProvider provider, IRowCursor[] inputs)
{
Contracts.AssertValue(provider);
int cthd = Interlocked.Exchange(ref _cthd, 0);
provider.Check(cthd > 1, "Consolidator can only be used once");
provider.Check(Utils.Size(inputs) == cthd, "Unexpected number of cursors");
// ConsolidateGeneric does all the standard validity checks: all cursors non-null,
// all have the same schema, all have the same active columns, and all active
// column types are cachable.
using (var ch = provider.Start("Consolidator"))
{
return(DataViewUtils.ConsolidateGeneric(provider, inputs, BatchSize));
}
}
