// Dyadic tuple: does Set ops depending on joinop bit flags
public TupleValue DyadicTuple(TupleValue tup1, TupleValue tup2, NumberValue joparg)
{
var joinop = (JoinOps)joparg.Value;
var mergeop = (MergeOps)((int)(joinop & JoinOps.SETOPS) >> 3); // FIX: bit func?
var newheading = DataHeading.Merge(mergeop, tup1.Value.Heading, tup2.Value.Heading);
Logger.WriteLine(3, "DyadicTuple {0} {1} n={2} ({3} {4})", tup1, tup2, joparg, mergeop, newheading);
var tupnew = DataRow.Create(newheading, tup1.Value, tup2.Value);
Logger.WriteLine(3, "[DT {0}]", tupnew);
return(TupleValue.Create(tupnew));
}
// Dyadic: does Join, Antijoin or Set ops depending on joinop bit flags
public RelationValue DyadicSet(RelationValue rel1, RelationValue rel2, NumberValue joparg)
{
var joinop = (JoinOps)joparg.Value;
var mergeop = (MergeOps)(joinop & JoinOps.MERGEOPS);
var newheading = DataHeading.Merge(mergeop, rel1.Value.Heading, rel2.Value.Heading);
Logger.WriteLine(3, "DyadicSet {0} {1} n={2} ({3} {4})", rel1, rel2, joparg, mergeop, newheading);
var rel1res = DataTable.ResolveDyadic(rel1.Value, rel2.Value);
var relnew = rel1res.DyadicSet(rel2.Value, joinop, newheading);
Logger.WriteLine(3, "[DS {0}]", relnew);
return(RelationValue.Create(relnew));
}