ParseTree* replaceRefCol(ParseTree*& n, CalpontSelectExecutionPlan::ReturnedColumnList& derivedColList)
{
ParseTree *lhs = n->left();
ParseTree *rhs = n->right();
if (lhs)
n->left(replaceRefCol(lhs, derivedColList));
if (rhs)
n->right(replaceRefCol(rhs, derivedColList));
SimpleFilter *sf = dynamic_cast<SimpleFilter*>(n->data());
ConstantFilter *cf = dynamic_cast<ConstantFilter*>(n->data());
ReturnedColumn *rc = dynamic_cast<ReturnedColumn*>(n->data());
if (sf)
{
sf->replaceRealCol(derivedColList);
}
else if (cf)
{
cf->replaceRealCol(derivedColList);
}
else if (rc)
{
SimpleColumn* sc = dynamic_cast<SimpleColumn*>(rc);
if (sc)
{
ReturnedColumn* tmp = derivedColList[sc->colPosition()]->clone();
delete sc;
n->data(tmp);
}
else
{
rc->replaceRealCol(derivedColList);
}
}
return n;
}
