public ComputeScalarIterator(Iterator input, IEnumerable <IteratorFunction> definedValues)
{
_input = input;
_definedValues = definedValues.ToImmutableArray();
_rowBuffer = new ArrayRowBuffer(_definedValues.Length);
_combinedRowBuffer = new CombinedRowBuffer(input.RowBuffer, _rowBuffer);
}
public StreamAggregateIterator(Iterator input, IEnumerable <RowBufferEntry> groupEntries, ImmutableArray <IComparer> comparers, IEnumerable <IAggregator> aggregators, IEnumerable <IteratorFunction> argumentFunctions)
{
_input = input;
_comparers = comparers;
_groupEntries = groupEntries.ToImmutableArray();
_aggregators = aggregators.ToImmutableArray();
_argumentFunctions = argumentFunctions.ToImmutableArray();
_rowBuffer = new ArrayRowBuffer(_groupEntries.Length + _aggregators.Length);
}
public override bool Read()
{
if (!_input.Read())
{
return(false);
}
// Read row from input and store it.
var spoolEntry = new ArrayRowBuffer(_input.RowBuffer.Count);
_input.RowBuffer.CopyTo(spoolEntry.Array, 0);
_tableSpoolStack.Push(spoolEntry);
return(true);
}
public TableIterator(TableDefinition table, IEnumerable <Func <object, object> > valueSelectors)
{
_table = table;
_definedValues = valueSelectors.ToImmutableArray();
_rowBuffer = new ArrayRowBuffer(_definedValues.Length);
}
