public HashMatchIterator(BoundHashMatchOperator logicalOperator, Iterator build, Iterator probe, int buildIndex, int probeIndex, IteratorPredicate remainder, HashMatchRowBuffer rowBuffer)
{
_logicalOperator = logicalOperator;
_build = build;
_probe = probe;
_buildIndex = buildIndex;
_probeIndex = probeIndex;
_remainder = remainder;
_rowBuffer = rowBuffer;
}
private Iterator BuildHashMatch(BoundHashMatchRelation relation)
{
var build = BuildRelation(relation.Build);
var buildAllocation = BuildRowBufferAllocation(relation.Build, build.RowBuffer);
var buildEntry = buildAllocation[relation.BuildKey];
var probe = BuildRelation(relation.Probe);
var probeAllocation = BuildRowBufferAllocation(relation.Probe, probe.RowBuffer);
var probeEntry = probeAllocation[relation.ProbeKey];
var outputRowBuffer = new HashMatchRowBuffer(build.RowBuffer.Count, probe.RowBuffer.Count);
var outputAllocation = BuildRowBufferAllocation(relation, outputRowBuffer);
var predicate = BuildPredicate(relation.Remainder, true, outputAllocation);
Debug.Assert(buildEntry.RowBuffer == build.RowBuffer);
Debug.Assert(probeEntry.RowBuffer == probe.RowBuffer);
return(new HashMatchIterator(relation.LogicalOperator, build, probe, buildEntry.Index, probeEntry.Index, predicate, outputRowBuffer));
}