private void CreateColumnRefs()
{
List <ColumnRefBinding> tableColumnRefs = new List <ColumnRefBinding>();
if (!(_definition is DerivedTableBinding) && !(_definition is CommonTableBinding))
{
// Create special row column ref
ColumnRefBinding rowColumnRefBinding = CreateRowColumnRefBinding(this);
tableColumnRefs.Add(rowColumnRefBinding);
}
// Create all column refs.
foreach (ColumnBinding columnDefinition in _definition.Columns)
{
ColumnRefBinding columnRefBinding = new ColumnRefBinding(this, columnDefinition);
RowBufferEntry rowBufferEntry = new RowBufferEntry(columnRefBinding.ColumnBinding.DataType);
rowBufferEntry.Name = columnRefBinding.GetFullName();
ColumnValueDefinition columnValueDefinition = new ColumnValueDefinition();
columnValueDefinition.Target = rowBufferEntry;
columnValueDefinition.ColumnRefBinding = columnRefBinding;
columnRefBinding.ValueDefinition = columnValueDefinition;
tableColumnRefs.Add(columnRefBinding);
}
// Assign column refs to table ref.
_columnRefs = tableColumnRefs.ToArray();
}
private static ColumnRefBinding CreateRowColumnRefBinding(TableRefBinding tableRefBinding)
{
RowColumnBinding rowColumnBinding = new RowColumnBinding(tableRefBinding.TableBinding);
ColumnRefBinding rowColumnRefBinding = new ColumnRefBinding(tableRefBinding, rowColumnBinding);
RowBufferEntry rowColumnBufferEntry = new RowBufferEntry(rowColumnRefBinding.ColumnBinding.DataType);
rowColumnBufferEntry.Name = rowColumnRefBinding.TableRefBinding.Name;
ColumnValueDefinition rowColumnValueDefinition = new ColumnValueDefinition();
rowColumnValueDefinition.Target = rowColumnBufferEntry;
rowColumnValueDefinition.ColumnRefBinding = rowColumnRefBinding;
rowColumnRefBinding.ValueDefinition = rowColumnValueDefinition;
return(rowColumnRefBinding);
}
private void PushOuterReferences(object[] rowBuffer, JoinAlgebraNode node)
{
if (node.OuterReferences != null && node.OuterReferences.Length > 0)
{
// Important: We cannot use node.OuterReferences as argument for BoundRowBufferEntrySet().
// The replacment strategy below will replace occurences to the entries by their index
// within the array. Therefore we need an array with the same layout as the row buffer.
RowBufferEntry[] outerReferences = new RowBufferEntry[node.Left.OutputList.Length];
for (int i = 0; i < outerReferences.Length; i++)
{
if (ArrayHelpers.Contains(node.OuterReferences, node.Left.OutputList[i]))
{
outerReferences[i] = node.Left.OutputList[i];
}
}
BoundRowBufferEntrySet bufferEntrySet = new BoundRowBufferEntrySet(rowBuffer, outerReferences);
_outerReferenceStack.Push(bufferEntrySet);
}
}
private static RuntimeValueOutput GetDefinedValue(RowBufferEntry[] outputList, RowBufferEntry rowBufferEntry)
{
RuntimeValueOutput result = new RuntimeValueOutput();
result.TargetIndex = Array.IndexOf(outputList, rowBufferEntry);
return(result);
}