use of org.apache.druid.query.vector.VectorCursorGranularizer in project druid by druid-io.
the class TimeseriesQueryEngine method processVectorized.
private Sequence<Result<TimeseriesResultValue>> processVectorized(final TimeseriesQuery query, final StorageAdapter adapter, @Nullable final Filter filter, final Interval queryInterval, final Granularity gran, final boolean descending) {
final boolean skipEmptyBuckets = query.isSkipEmptyBuckets();
final List<AggregatorFactory> aggregatorSpecs = query.getAggregatorSpecs();
final VectorCursor cursor = adapter.makeVectorCursor(filter, queryInterval, query.getVirtualColumns(), descending, QueryContexts.getVectorSize(query), null);
if (cursor == null) {
return Sequences.empty();
}
final Closer closer = Closer.create();
closer.register(cursor);
try {
final VectorCursorGranularizer granularizer = VectorCursorGranularizer.create(adapter, cursor, gran, queryInterval);
if (granularizer == null) {
return Sequences.empty();
}
final VectorColumnSelectorFactory columnSelectorFactory = cursor.getColumnSelectorFactory();
final AggregatorAdapters aggregators = closer.register(AggregatorAdapters.factorizeVector(columnSelectorFactory, query.getAggregatorSpecs()));
final ResourceHolder<ByteBuffer> bufferHolder = closer.register(bufferPool.take());
final ByteBuffer buffer = bufferHolder.get();
if (aggregators.spaceNeeded() > buffer.remaining()) {
throw new ISE("Not enough space for aggregators, needed [%,d] bytes but have only [%,d].", aggregators.spaceNeeded(), buffer.remaining());
}
return Sequences.withBaggage(Sequences.simple(granularizer.getBucketIterable()).map(bucketInterval -> {
// Whether or not the current bucket is empty
boolean emptyBucket = true;
while (!cursor.isDone()) {
granularizer.setCurrentOffsets(bucketInterval);
if (granularizer.getEndOffset() > granularizer.getStartOffset()) {
if (emptyBucket) {
aggregators.init(buffer, 0);
}
aggregators.aggregateVector(buffer, 0, granularizer.getStartOffset(), granularizer.getEndOffset());
emptyBucket = false;
}
if (!granularizer.advanceCursorWithinBucket()) {
break;
}
}
if (emptyBucket && skipEmptyBuckets) {
// Return null, will get filtered out later by the Objects::nonNull filter.
return null;
}
final TimeseriesResultBuilder bob = new TimeseriesResultBuilder(gran.toDateTime(bucketInterval.getStartMillis()));
if (emptyBucket) {
aggregators.init(buffer, 0);
}
for (int i = 0; i < aggregatorSpecs.size(); i++) {
bob.addMetric(aggregatorSpecs.get(i).getName(), aggregators.get(buffer, 0, i));
}
return bob.build();
}).filter(Objects::nonNull), closer);
} catch (Throwable t1) {
try {
closer.close();
} catch (Throwable t2) {
t1.addSuppressed(t2);
}
throw t1;
}
}
Aggregations