// -------------------------------------------------------------------
// This method returns the child as a cut-op.
// If the child is a group it return a cut-op for that group.
// If the child is a RelExpr it return a cut-op that shares its GA
// -------------------------------------------------------------------
CutOp* MultiJoin::getJBBCCutOpExpr(CANodeId jbbc) const
{
// everything here goes to statement heap
CollHeap* outHeap = CmpCommon::statementHeap();
CutOp* result = new (outHeap) CutOp(0, outHeap); // we set index to 0 cuz it does not matter
ExprGroupId exprGroupId = childrenMap_.getExprGroupIdOfJBBC(jbbc);
if (exprGroupId.getGroupId() == INVALID_GROUP_ID)
result->setExpr(exprGroupId.getPtr());
else
result->setGroupIdAndAttr(exprGroupId.getGroupId());
return result;
}
// -------------------------------------------------------------------
// This method returns the child as a RelExpr. If the child is
// a group it return a cut-op for that group.
// -------------------------------------------------------------------
RelExpr* MultiJoin::getJBBCRelExpr(CANodeId jbbc) const
{
RelExpr* result = NULL;
// everything here goes to statement heap
CollHeap* outHeap = CmpCommon::statementHeap();
ExprGroupId exprGroupId = childrenMap_.getExprGroupIdOfJBBC(jbbc);
if (exprGroupId.getGroupId() == INVALID_GROUP_ID)
result = exprGroupId.getPtr();
else
{
result = new (outHeap) CutOp(exprGroupId.getGroupId(), outHeap);
((CutOp*)result)->setGroupIdAndAttr(exprGroupId.getGroupId());
// may be we should re-use existing cut-op rather than creating
// new one.
}
return result;
}
