@Override
public PlanString getPlanString() {
PlanString planStr = new PlanString("Join (type : ")
.appendTitle(joinType +")");
if (hasJoinQual()) {
planStr.addExplan("Join Cond: " + joinQual.toString());
}
planStr.addDetail("in schema: " + getInSchema());
planStr.addDetail("out schema: " + getOutSchema());
return planStr;