//Get the position block on predicaiton
MultiPosFilterBlock* DataSource::getPosOnPred(){
/*
* This method should be rewritten in children class
* For the reason of different value types.
* The default here is string.
*/
matchedPredPos = new MultiPosFilterBlock ();
if(pred==NULL)matchedPredPos->setCompleteSet(true);
else{
predChanged=false;//Reset predChanged
ValPos* rhsvp = pred->getRHS();
char* rhsval = (char*)rhsvp->value;
ValPos* tempVP = rhsvp->clone();
int valsize = pred->getRHS()->getSize();
unsigned char* temp;
if (pred->getRHS()->type == ValPos::STRINGTYPE){
temp = StringUtil::getSmallestLargerValue(rhsval,valsize);
tempVP->set(temp);
}else{//Default is string type column.
return NULL;
}
if (valSorted) {
getPosOnPredValueSorted(rhsvp, tempVP);
}else {// The column is not value sorted
getPosOnPredValueUnsorted((ROSAM*)am, rhsvp, tempVP);
}
}
return matchedPredPos;
}
void PipelinedAggregator::aggregateOneValuedBlocks() {
// this condition should have been caught in generateBlocks
assert(m_groupBlockIn != NULL);
m_aggData->reset();
// extent of group is entire block b/c of one value property
int groupStart, groupEnd;
ValPos *vp = m_groupBlockIn->getNext();
do {
//assume int type for now ... fix later
//assert(vp->type == ValPos::INTTYPE);
//groupVal = *(int*)vp->value;
groupStart = vp->position;
groupEnd = m_groupBlockIn->getPairAtLoc(m_groupBlockIn->getSize()-1)->position;
// debugging
//cout << " Mcurr " << m_currGroup << " val " << pair->value << " Position " << pair->position << " (not that end, eln is " << groupEnd << endl;
if (m_currGroup && *m_currGroup > vp) {
throw new UnexpectedException("input to PipelinedAggregator is not sorted");
}
delete m_currGroup;
m_currGroup = vp->clone();
// must read in only one block?
processAggBlock(m_aggData, vp, groupStart, groupEnd);
m_groupBlockIn = m_group->getNextValBlock(m_groupColIndex);
if (m_aggType == GROUP_BY_SELF) {
m_aggBlockIn = m_groupBlockIn;
}
} while (m_groupBlockIn != NULL && (vp = m_groupBlockIn->getNext()) && (*vp == m_currGroup));
// keep reading in group blocks while the value hasn't changed
if (m_groupBlockIn && vp)
m_groupBlockIn->resetBlock();
// write out the next value
double aggValue = m_aggData->evaluate();
//logOutputBlock(groupVal, aggValue);
m_currGroup->position=m_currOutputPosition;
m_groupBlockOut->setValue(m_currGroup);
DoubleValPos lvp;
lvp.set(m_currOutputPosition, (byte*)&aggValue);
m_aggBlockOut->setValue(&lvp);
m_currOutputPosition++;
}
//Get the position block on predicaiton
MultiPosFilterBlock* RLEDataSource::getPosOnPred(){
if (m_pPred == NULL){
matchedPredPos = new MultiPosFilterBlock();
matchedPredPos->setCompleteSet(true);
}
else{
predChanged = false;//Reset predChanged
ValPos* rhsvp = m_pPred->getRHS();
char* rhsval = (char*)rhsvp->value;
ValPos* tempVP = rhsvp->clone();
int valsize = m_pPred->getRHS()->getSize();
unsigned char* temp;
temp = StringUtil::getSmallestLargerValue(rhsval, valsize);
tempVP->set(temp);
// The column is for sure not value sorted
if (!getPosOnPredValueUnsorted((ROSAM*)am, rhsvp, tempVP))
//If nothing find, matched predication position is a NULL set.
matchedPredPos = new MultiPosFilterBlock();
}
return matchedPredPos;
}
void PipelinedAggregator::aggregateMultiValuedBlocks() {
// update to next group block if current block has no more groups
if (!m_groupBlockIn->hasNext()) {
m_groupBlockIn = m_group->getNextValBlock(m_groupColIndex);
// if (m_groupBlockIn)
//groupStart=m_groupBlockIn->peekNext()->position;
//else
if (!m_groupBlockIn) {
m_groupBlockOut = NULL;
m_aggBlockOut = NULL;
return;
}
if (m_aggType == GROUP_BY_SELF) {
m_aggBlockIn = m_groupBlockIn;
}
}
ValPos* vp = m_groupBlockIn->getNext();
//assume int type for now ... fix later
//assert(vp->type == ValPos::INTTYPE);
//int groupVal = *(int*)vp->value;
int groupStart = vp->position;
// debugging
if (m_currGroup && *m_currGroup > vp) {
throw new UnexpectedException("input to PipelinedAggregator is not sorted");
}
delete m_currGroup;
m_currGroup = vp->clone();
m_aggData->reset();
// calculate extent of group, reading in blocks as necessary
//if (m_groupBlockIn) {
while (m_groupBlockIn->hasNext() && *m_groupBlockIn->peekNext() == vp) {
while (m_groupBlockIn->hasNext() && *m_groupBlockIn->peekNext() == vp) {
vp = m_groupBlockIn->getNext();
//assume int type for now ... fix later
//assert(vp->type == ValPos::INTTYPE);
}
if (!m_groupBlockIn->hasNext()) {
m_groupBlockIn = m_group->getNextValBlock(m_groupColIndex);
if (!m_groupBlockIn) {
break;
}
if (m_aggType == GROUP_BY_SELF) {
m_aggBlockIn = m_groupBlockIn;
}
}
}
int groupEnd = vp->position;
// processAggBlock pulls up new blocks if necessary
processAggBlock(m_aggData, vp, groupStart, groupEnd);
//}
// write out the next value
double aggValue = m_aggData->evaluate();
//logOutputBlock(groupVal, aggValue);
//m_groupBlockOut->setValue(groupVal, m_currOutputPosition);
m_currGroup->position=m_currOutputPosition;
m_groupBlockOut->setValue(m_currGroup);
DoubleValPos lvp;
lvp.set(m_currOutputPosition, (byte*)&aggValue);
m_aggBlockOut->setValue(&lvp);
m_currOutputPosition++;
}