public override CGroupMember Apply(CGroupMember expr)
{
LogicJoin log = expr.logic_ as LogicJoin;
var l = new PhysicMemoRef(log.l_());
var r = new PhysicMemoRef(log.r_());
var hashjoin = new PhysicHashJoin(log, l, r);
return(new CGroupMember(hashjoin, expr.group_));
}
public override CGroupMember Apply(CGroupMember expr)
{
LogicJoin log = expr.logic_ as LogicJoin;
var l = new PhysicMemoRef(log.l_());
var r = new PhysicMemoRef(log.r_());
PhysicNode phy = new PhysicNLJoin(log, l, r);
return(new CGroupMember(phy, expr.group_));
}
// initialization: enqueue all vertex nodes
protected void InitByInsertBasicTables(JoinGraph graph)
{
graph_ = graph;
foreach (var logic in graph.vertices_)
{
BitVector contained = 1 << graph.vertices_.IndexOf(logic);
logic.tableContained_ = contained;
if (graph.memo_ is null)
{
bestTree_[contained] = new PhysicScanTable(logic);
}
else
{
// vertices are already inserted into memo
var cgroup = graph.memo_.LookupCGroup(logic);
var logicref = new LogicMemoRef(cgroup);
bestTree_[contained] = new PhysicMemoRef(logicref);
}
}
}
