void Chunk::merge(ConstChunk const& with, boost::shared_ptr<Query>& query)
{
if (getDiskChunk() != NULL)
throw USER_EXCEPTION(SCIDB_SE_MERGE, SCIDB_LE_CHUNK_ALREADY_EXISTS);
setCount(0); // unknown
AttributeDesc const& attr = getAttributeDesc();
char* dst = (char*)getData();
Value const& defaultValue = attr.getDefaultValue();
if (dst != NULL && (isSparse() || isRLE() || with.isSparse() || with.isRLE() || attr.isNullable() || TypeLibrary::getType(attr.getType()).variableSize()
|| !defaultValue.isZero()))
{
int sparseMode = isSparse() ? ChunkIterator::SPARSE_CHUNK : 0;
boost::shared_ptr<ChunkIterator> dstIterator = getIterator(query, sparseMode|ChunkIterator::APPEND_CHUNK|ChunkIterator::NO_EMPTY_CHECK);
boost::shared_ptr<ConstChunkIterator> srcIterator = with.getConstIterator(ChunkIterator::IGNORE_EMPTY_CELLS|ChunkIterator::IGNORE_DEFAULT_VALUES);
if (getArrayDesc().getEmptyBitmapAttribute() != NULL) {
while (!srcIterator->end()) {
if (!dstIterator->setPosition(srcIterator->getPosition()))
throw SYSTEM_EXCEPTION(SCIDB_SE_MERGE, SCIDB_LE_OPERATION_FAILED) << "setPosition";
Value const& value = srcIterator->getItem();
dstIterator->writeItem(value);
++(*srcIterator);
}
} else { // ignore default values
while (!srcIterator->end()) {
Value const& value = srcIterator->getItem();
if (value != defaultValue) {
if (!dstIterator->setPosition(srcIterator->getPosition()))
throw SYSTEM_EXCEPTION(SCIDB_SE_MERGE, SCIDB_LE_OPERATION_FAILED) << "setPosition";
dstIterator->writeItem(value);
}
++(*srcIterator);
}
}
dstIterator->flush();
} else {
PinBuffer scope(with);
char* src = (char*)with.getData();
if (dst == NULL) {
allocate(with.getSize());
setSparse(with.isSparse());
setRLE(with.isRLE());
memcpy(getData(), src, getSize());
} else {
if (getSize() != with.getSize())
throw USER_EXCEPTION(SCIDB_SE_MERGE, SCIDB_LE_CANT_MERGE_CHUNKS_WITH_VARYING_SIZE);
for (size_t j = 0, n = getSize(); j < n; j++) {
dst[j] |= src[j];
}
}
write(query);
}
}
void Chunk::aggregateMerge(ConstChunk const& with, AggregatePtr const& aggregate, boost::shared_ptr<Query>& query)
{
if (getDiskChunk() != NULL)
throw USER_EXCEPTION(SCIDB_SE_MERGE, SCIDB_LE_CHUNK_ALREADY_EXISTS);
if (isReadOnly())
throw USER_EXCEPTION(SCIDB_SE_MERGE, SCIDB_LE_CANT_UPDATE_READ_ONLY_CHUNK);
AttributeDesc const& attr = getAttributeDesc();
if (aggregate->getStateType().typeId() != attr.getType())
throw SYSTEM_EXCEPTION(SCIDB_SE_MERGE, SCIDB_LE_TYPE_MISMATCH_BETWEEN_AGGREGATE_AND_CHUNK);
if (!attr.isNullable())
throw SYSTEM_EXCEPTION(SCIDB_SE_INTERNAL, SCIDB_LE_AGGREGATE_STATE_MUST_BE_NULLABLE);//enforce equivalency w above merge()
setCount(0);
char* dst = (char*)getData();
if (dst != NULL)
{
int sparseMode = isSparse() ? ChunkIterator::SPARSE_CHUNK : 0;
boost::shared_ptr<ChunkIterator>dstIterator = getIterator(query, sparseMode|ChunkIterator::APPEND_CHUNK|ChunkIterator::NO_EMPTY_CHECK);
boost::shared_ptr<ConstChunkIterator> srcIterator = with.getConstIterator(ChunkIterator::IGNORE_NULL_VALUES);
while (!srcIterator->end())
{
Value& val = srcIterator->getItem();
if (!val.isNull())
{
if (!dstIterator->setPosition(srcIterator->getPosition()))
throw SYSTEM_EXCEPTION(SCIDB_SE_MERGE, SCIDB_LE_OPERATION_FAILED) << "setPosition";
Value& val2 = dstIterator->getItem();
if (!val2.isNull())
{
aggregate->merge(val, val2);
}
dstIterator->writeItem(val);
}
++(*srcIterator);
}
dstIterator->flush();
}
else
{
PinBuffer scope(with);
char* src = (char*)with.getData();
allocate(with.getSize());
setSparse(with.isSparse());
setRLE(with.isRLE());
memcpy(getData(), src, getSize());
write(query);
}
}
