public int Compare(IRow x, IRow y)
{
return(_manager.EvaluateSort(_order, x[_order.Column.Name], y[_order.Column.Name]));
}
public int Compare(IValueManager manager, Schema.IRowType indexKeyRowType, NativeRow indexKey, Schema.IRowType compareKeyRowType, NativeRow compareKey)
{
// If AIndexKeyRowType is null, the index key must have the structure of an index key,
// Otherwise, the IndexKey row could be a subset of the actual index key.
// In that case, AIndexKeyRowType is the RowType for the IndexKey row.
// It is the caller's responsibility to ensure that the passed IndexKey RowType
// is a subset of the actual IndexKey with order intact.
//Row LIndexKey = new Row(AManager, AIndexKeyRowType, AIndexKey);
// If ACompareContext is null, the compare key must have the structure of an index key,
// Otherwise the CompareKey could be a subset of the actual index key.
// In that case, ACompareContext is the RowType for the CompareKey row.
// It is the caller's responsibility to ensure that the passed CompareKey RowType
// is a subset of the IndexKey with order intact.
//Row LCompareKey = new Row(AManager, ACompareKeyRowType, ACompareKey);
int result = 0;
for (int index = 0; index < indexKeyRowType.Columns.Count; index++)
{
if (index >= compareKeyRowType.Columns.Count)
{
break;
}
if ((indexKey.Values[index] != null) && (compareKey.Values[index] != null))
{
if (indexKeyRowType.Columns[index].DataType is Schema.ScalarType)
{
result = manager.EvaluateSort(Key.Columns[index], indexKey.Values[index], compareKey.Values[index]);
}
else
{
using (var indexValue = DataValue.FromNative(manager, indexKey.DataTypes[index], indexKey.Values[index]))
{
using (var compareValue = DataValue.FromNative(manager, compareKey.DataTypes[index], compareKey.Values[index]))
{
result = manager.EvaluateSort(Key.Columns[index], indexValue, compareValue);
}
}
}
}
else if (indexKey.Values[index] != null)
{
result = Key.Columns[index].Ascending ? 1 : -1;
}
else if (compareKey.Values[index] != null)
{
result = Key.Columns[index].Ascending ? -1 : 1;
}
else
{
result = 0;
}
if (result != 0)
{
break;
}
}
//LIndexKey.Dispose();
//LCompareKey.Dispose();
return(result);
}