public override CGroupMember Apply(CGroupMember expr)
{
var log = expr.logic_ as LogicJoinBlock;
var solver = new DPccp();
var joinplan = solver.Reset().Run(log.graph_);
return(new CGroupMember(joinplan, expr.group_));
}
static public void Test()
{
DPccp solver = new DPccp();
// book figure 3.12
var tables = new string[] { "T1", "T2", "T3", "T4", "T5" };
JoinGraph figure312 = new JoinGraph(tables, new string[] { "T1*T2", "T1*T3", "T1*T4", "T3*T4", "T5*T2", "T5*T3", "T5*T4" });
Debug.Assert(figure312.joinbits_.Count == 5 && figure312.preds_.Count == 7);
solver.Reset().Run(figure312);
// full test
DoTest(new DPccp());
}