public ABTreeSorterHalfStreamed(ExpressionComparer[] comparers, IOrderByExecutionHelper executionHelper, int columnCount, int[] usedVars, bool allowDup) : base(comparers, executionHelper, columnCount, usedVars)
{
this.sortJobs = new SortJob[this.executionHelper.ThreadCount];
for (int i = 0; i < sortJobs.Length; i++)
{
var results = new TableResults(this.ColumnCount, this.executionHelper.FixedArraySize, this.usedVars);
this.sortJobs[i] = CreateJob(new IndexToRowProxyComparer(RowComparer.Factory(this.comparers, true), results, allowDup), results);
}
}
/// <summary>
/// Constructs multi column sorter.
/// It comprises of row comparers wrapped inside an integer comparer.
/// </summary>
/// <param name="resTable"> A result table to sort. </param>
/// <param name="expressionComparers"> Comparers for comparing rows in the table. </param>
/// <param name="inParallel"> A flag if the table should be sorted in parallel. </param>
public MultiColumnTableSorter(ITableResults resTable, ExpressionComparer[] expressionComparers, bool inParallel) : base(resTable, inParallel)
{
if (resTable == null || expressionComparers == null || expressionComparers.Length == 0)
{
throw new ArgumentNullException($"{this.GetType()}, trying to assign null to a construtor.");
}
var rowComparer = RowComparer.Factory(expressionComparers, !inParallel);
this.indexComparer = new IndexToRowProxyComparer(rowComparer, resTable, true);
}
public ABTreeStreamedSorter(ExpressionComparer[] comparers, IOrderByExecutionHelper executionHelper, int columnCount, int[] usedVars, bool allowDup) : base(comparers, executionHelper, columnCount, usedVars)
{
this.firstKeyHasher = (TypeRangeHasher <T>)TypeRangeHasher.Factory(this.executionHelper.ThreadCount, typeof(T));
this.firstKeyExpressionHolder = this.comparers[0].GetExpressionHolder();
this.firstKeyExpression = (ExpressionReturnValue <T>) this.firstKeyExpressionHolder.Expr;
this.rangeBuckets = new RangeBucket[this.firstKeyHasher.BucketCount];
this.firstKeyComparers = new ExpressionComparer <T> [this.rangeBuckets.Length];
for (int i = 0; i < this.rangeBuckets.Length; i++)
{
var results = new TableResults(this.ColumnCount, this.executionHelper.FixedArraySize, this.usedVars);
var tmpRowComparer = RowComparer.Factory(this.comparers, true);
this.firstKeyComparers[i] = (ExpressionComparer <T>)tmpRowComparer.comparers[0];
this.rangeBuckets[i] = CreateBucket(new IndexToRowProxyComparer(tmpRowComparer, results, allowDup), results);
}
}
protected override void MergeResuls()
{
this.mergeJob = new MergeObjectRowProxy(this.sortJobs, RowComparer.Factory(this.comparers, false));
if (this.mergeJob.jobsToMerge.Length >= 2)
{
this.sortJobs = null;
this.mergedResults = this.mergeJob.Merge();
}
else if (this.mergeJob.jobsToMerge.Length == 1)
{
this.sortJobs = this.mergeJob.jobsToMerge;
}
else
{
this.sortJobs = new SortJob[] { this.sortJobs[0] }
};
}