// implement RelNode
public RelOptCost computeSelfCost(RelOptPlanner planner) {
double dRows = RelMetadataQuery.getRowCount(this);
// Assume CPU is negligible since values are precomputed.
double dCpu = 1;
double dIo = 0;
return planner.makeCost(dRows, dCpu, dIo);
}
public RelOptCost computeSelfCost(RelOptPlanner planner) {
double dRows = RelMetadataQuery.getRowCount(this);
double dCpu = RelMetadataQuery.getRowCount(getChild()) * program.getExprCount();
double dIo = 0;
return planner.makeCost(dRows, dCpu, dIo);
}