bool PhysicalProjectionScan::Open(SegmentExecStatus* const exec_status,
const PartitionOffset& kPartitionOffset) {
RETURN_IF_CANCELLED(exec_status);
RegisterExpandedThreadToAllBarriers();
if (TryEntryIntoSerializedSection()) {
/* this is the first expanded thread*/
PartitionStorage* partition_handle_;
if (NULL ==
(partition_handle_ = BlockManager::getInstance()->GetPartitionHandle(
PartitionID(state_.projection_id_, kPartitionOffset)))) {
LOG(ERROR) << PartitionID(state_.projection_id_, kPartitionOffset)
.getName()
.c_str() << CStrError(rNoPartitionIdScan) << std::endl;
SetReturnStatus(false);
} else {
partition_reader_iterator_ =
partition_handle_->CreateAtomicReaderIterator();
SetReturnStatus(true);
}
#ifdef AVOID_CONTENTION_IN_SCAN
unsigned long long start = curtick();
ChunkReaderIterator* chunk_reader_it;
ChunkReaderIterator::block_accessor* ba;
while (chunk_reader_it = partition_reader_iterator_->NextChunk()) {
while (chunk_reader_it->GetNextBlockAccessor(ba)) {
ba->GetBlockSize();
input_dataset_.input_data_blocks_.push_back(ba);
}
}
#endif
ExpanderTracker::getInstance()->addNewStageEndpoint(
pthread_self(), LocalStageEndPoint(stage_src, "Scan", 0));
perf_info_ =
ExpanderTracker::getInstance()->getPerformanceInfo(pthread_self());
perf_info_->initialize();
}
BarrierArrive();
return GetReturnStatus();
}
bool IndexScanIterator::Open(const PartitionOffset& partition_off)
{
AtomicPushBlockStream(BlockStreamBase::createBlockWithDesirableSerilaizedSize(state_.schema_, state_.block_size_));
if(TryEntryIntoSerializedSection()){
/* this is the first expanded thread*/
csb_index_list_ = IndexManager::getInstance()->getAttrIndex(state_.index_id_);
PartitionStorage* partition_handle_;
if((partition_handle_=BlockManager::getInstance()->getPartitionHandle(PartitionID(state_.projection_id_,partition_off)))==0){
printf("The partition[%s] does not exists!\n",PartitionID(state_.projection_id_,partition_off).getName().c_str());
SetReturnStatus(false);
}
else{
partition_reader_iterator_=partition_handle_->createAtomicReaderIterator();
// chunk_reader_iterator_ = partition_reader_iterator_->nextChunk();
}
SetReturnStatus(true);
}
BarrierArrive();
return GetReturnStatus();
}
//--------------------------------------------------------------------------------------
// Initialises the return specific status decorator.
//--------------------------------------------------------------------------------------
void TeamReturnSpecificStatus::OnInitialise(void)
{
SetReturnStatus(m_returnStatus);
}
