/**
* Perform operator-specific checks of input and return the shape of the output. Currently,
* the output array must exist.
* @param schemas the shapes of the input arrays
* @param query the query context
*/
ArrayDesc inferSchema(std::vector< ArrayDesc> schemas, std::shared_ptr< Query> query)
{
SCIDB_ASSERT(schemas.size() == 1);
SCIDB_ASSERT(_parameters.size() == 1);
string arrayNameOrg =
((std::shared_ptr<OperatorParamReference>&)_parameters[0])->getObjectName();
SCIDB_ASSERT(ArrayDesc::isNameUnversioned(arrayNameOrg));
//Ensure attributes names uniqueness.
std::string arrayName;
std::string namespaceName;
query->getNamespaceArrayNames(arrayNameOrg, namespaceName, arrayName);
ArrayDesc dstDesc;
ArrayDesc const& srcDesc = schemas[0];
ArrayID arrayId = query->getCatalogVersion(namespaceName, arrayName);
bool fArrayDesc = scidb::namespaces::Communicator::getArrayDesc(
namespaceName, arrayName, arrayId, dstDesc, false);
if (!fArrayDesc) {
throw USER_EXCEPTION(SCIDB_SE_INFER_SCHEMA, SCIDB_LE_ARRAY_DOESNT_EXIST) << arrayName;
}
ArrayDesc::checkConformity(srcDesc, dstDesc,
ArrayDesc::IGNORE_PSCHEME |
ArrayDesc::IGNORE_OVERLAP |
ArrayDesc::IGNORE_INTERVAL); // allows auto-repart()
SCIDB_ASSERT(dstDesc.getId() == dstDesc.getUAId());
SCIDB_ASSERT(dstDesc.getName() == arrayName);
SCIDB_ASSERT(dstDesc.getUAId() > 0);
return dstDesc;
}
DBArray::DBArray(ArrayDesc const& desc, const boost::shared_ptr<Query>& query)
:
_desc(desc),
_query(query)
{
_desc.setPartitioningSchema(SystemCatalog::getInstance()->getPartitioningSchema(desc.getId()));
if (query) {
query->sharedLock(getRealName());
}
}
void InputArray::redistributeShadowArray(boost::shared_ptr<Query> const& query)
{
SCIDB_ASSERT(shadowArray);
//All arrays are currently stored as round-robin. Let's store shadow arrays round-robin as well
//TODO: revisit this when we allow users to store arrays with specified distributions
PartitioningSchema ps = psHashPartitioned;
ArrayDesc shadowArrayDesc = shadowArray->getArrayDesc();
string shadowArrayVersionName;
LOG4CXX_DEBUG(logger, "Redistribute shadow array " << shadowArrayDesc.getName());
if (! query->isCoordinator()) {
// worker
string shadowArrayName = shadowArrayDesc.getName();
SCIDB_ASSERT(ArrayDesc::isNameUnversioned(shadowArrayName));
shared_ptr<SystemCatalog::LockDesc> lock(new SystemCatalog::LockDesc(shadowArrayName,
query->getQueryID(),
Cluster::getInstance()->getLocalInstanceId(),
SystemCatalog::LockDesc::WORKER,
SystemCatalog::LockDesc::WR));
shared_ptr<Query::ErrorHandler> ptr(new UpdateErrorHandler(lock));
query->pushErrorHandler(ptr);
Query::Finalizer f = bind(&UpdateErrorHandler::releaseLock, lock, _1);
query->pushFinalizer(f);
SystemCatalog::ErrorChecker errorChecker = bind(&Query::validate, query);
if (!SystemCatalog::getInstance()->lockArray(lock, errorChecker)) {
throw USER_EXCEPTION(SCIDB_SE_SYSCAT, SCIDB_LE_CANT_INCREMENT_LOCK) << shadowArrayName;
}
ArrayDesc desc;
bool arrayExists = SystemCatalog::getInstance()->getArrayDesc(shadowArrayName, desc, false);
VersionID lastVersion = 0;
if (arrayExists) {
lastVersion = SystemCatalog::getInstance()->getLastVersion(desc.getId());
}
VersionID version = lastVersion+1;
lock->setArrayVersion(version);
bool rc = SystemCatalog::getInstance()->updateArrayLock(lock);
SCIDB_ASSERT(rc);
LOG4CXX_DEBUG(logger, "Use version " << version << " of shadow array " << shadowArrayName);
shadowArrayVersionName = ArrayDesc::makeVersionedName(shadowArrayName, version);
} else {
// coordinator
shadowArrayVersionName = shadowArrayDesc.getName();
SCIDB_ASSERT(ArrayDesc::isNameVersioned(shadowArrayVersionName));
}
shared_ptr<Array> persistentShadowArray(DBArray::newDBArray(shadowArrayVersionName, query));
ArrayDesc const& dstArrayDesc = persistentShadowArray->getArrayDesc();
query->getReplicationContext()->enableInboundQueue(dstArrayDesc.getId(),
persistentShadowArray);
set<Coordinates, CoordinatesLess> newChunkCoordinates;
redistributeToArray(shadowArray, persistentShadowArray, &newChunkCoordinates,
query, ps,
ALL_INSTANCE_MASK,
boost::shared_ptr <DistributionMapper>(),
0,
shared_ptr<PartitioningSchemaData>());
StorageManager::getInstance().removeDeadChunks(dstArrayDesc, newChunkCoordinates, query);
query->getReplicationContext()->replicationSync(dstArrayDesc.getId());
query->getReplicationContext()->removeInboundQueue(dstArrayDesc.getId());
StorageManager::getInstance().flush();
PhysicalBoundaries bounds = PhysicalBoundaries::createFromChunkList(persistentShadowArray,
newChunkCoordinates);
SystemCatalog::getInstance()->updateArrayBoundaries(dstArrayDesc, bounds);
// XXX TODO: add: getInjectedErrorListener().check();
}