/// <summary>
/// Determines the order index state for the output operator
/// </summary>
private void InitOrderIndexState()
{
// SkipWhile/TakeWhile needs an increasing index. However, if the predicate expression depends on the index,
// the index needs to be correct, not just increasing.
OrdinalIndexState requiredIndexState = OrdinalIndexState.Increasing;
OrdinalIndexState childIndexState = Child.OrdinalIndexState;
if (_indexedPredicate != null)
{
requiredIndexState = OrdinalIndexState.Correct;
_limitsParallelism = childIndexState == OrdinalIndexState.Increasing;
}
OrdinalIndexState indexState = ExchangeUtilities.Worse(childIndexState, OrdinalIndexState.Correct);
if (indexState.IsWorseThan(requiredIndexState))
{
_prematureMerge = true;
}
if (!_take)
{
// If the index was correct, now it is only increasing.
indexState = indexState.Worse(OrdinalIndexState.Increasing);
}
SetOrdinalIndexState(indexState);
}
private void QuickSortIndicesInPlace(GrowingArray <TKey> keys, List <TInputOutput> values, OrdinalIndexState ordinalIndexState)
{
int[] indices = new int[values.Count];
for (int i = 0; i < indices.Length; i++)
{
indices[i] = i;
}
if ((indices.Length > 1) && ordinalIndexState.IsWorseThan(OrdinalIndexState.Increasing))
{
this.QuickSort(0, indices.Length - 1, keys.InternalArray, indices, this.m_groupState.CancellationState.MergedCancellationToken);
}
if (this.m_partitionCount == 1)
{
TInputOutput[] localArray = new TInputOutput[values.Count];
for (int j = 0; j < indices.Length; j++)
{
localArray[j] = values[indices[j]];
}
this.m_sharedValues[this.m_partitionIndex] = localArray;
}
else
{
this.m_sharedIndices[this.m_partitionIndex] = indices;
this.m_sharedKeys[this.m_partitionIndex] = keys;
this.m_sharedValues[this.m_partitionIndex] = new TInputOutput[values.Count];
values.CopyTo(this.m_sharedValues[this.m_partitionIndex]);
}
}
/// <summary>
/// Determines the order index state for the output operator
/// </summary>
private OrdinalIndexState OutputOrderIndexState()
{
// SkipWhile/TakeWhile needs an increasing index. However, if the predicate expression depends on the index,
// the index needs to be correct, not just increasing.
OrdinalIndexState requiredIndexState = OrdinalIndexState.Increasing;
if (m_indexedPredicate != null)
{
requiredIndexState = OrdinalIndexState.Correct;
}
OrdinalIndexState indexState = ExchangeUtilities.Worse(Child.OrdinalIndexState, OrdinalIndexState.Correct);
if (indexState.IsWorseThan(requiredIndexState))
{
m_prematureMerge = true;
}
if (!m_take)
{
// If the index was correct, now it is only increasing.
indexState = indexState.Worse(OrdinalIndexState.Increasing);
}
return(indexState);
}
private OrdinalIndexState OutputOrdinalIndexState()
{
OrdinalIndexState ordinalIndexState = base.Child.OrdinalIndexState;
if (ordinalIndexState == OrdinalIndexState.Indexible)
{
return(OrdinalIndexState.Indexible);
}
if (ordinalIndexState.IsWorseThan(OrdinalIndexState.Increasing))
{
this.m_prematureMerge = true;
ordinalIndexState = OrdinalIndexState.Correct;
}
if (!this.m_take && (ordinalIndexState == OrdinalIndexState.Correct))
{
ordinalIndexState = OrdinalIndexState.Increasing;
}
return(ordinalIndexState);
}
private OrdinalIndexState OutputOrderIndexState()
{
OrdinalIndexState increasing = OrdinalIndexState.Increasing;
if (this.m_indexedPredicate != null)
{
increasing = OrdinalIndexState.Correct;
}
OrdinalIndexState state2 = base.Child.OrdinalIndexState.Worse(OrdinalIndexState.Correct);
if (state2.IsWorseThan(increasing))
{
this.m_prematureMerge = true;
}
if (!this.m_take)
{
state2 = state2.Worse(OrdinalIndexState.Increasing);
}
return(state2);
}
/// <summary>
/// Determines the order index state for the output operator
/// </summary>
private OrdinalIndexState OutputOrdinalIndexState()
{
OrdinalIndexState indexState = Child.OrdinalIndexState;
if (indexState == OrdinalIndexState.Indexable)
{
return(OrdinalIndexState.Indexable);
}
if (indexState.IsWorseThan(OrdinalIndexState.Increasing))
{
_prematureMerge = true;
indexState = OrdinalIndexState.Correct;
}
// If the operator is skip and the index was correct, now it is only increasing.
if (!_take && indexState == OrdinalIndexState.Correct)
{
indexState = OrdinalIndexState.Increasing;
}
return(indexState);
}
