Jackie-Jiang commented on a change in pull request #7454: URL: https://github.com/apache/pinot/pull/7454#discussion_r713299682
########## File path: pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/index/readers/BitSlicedRangeIndexReader.java ########## @@ -0,0 +1,171 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.pinot.segment.local.segment.index.readers; + +import java.io.IOException; +import java.lang.ref.SoftReference; +import java.nio.ByteBuffer; +import java.util.concurrent.atomic.AtomicReferenceFieldUpdater; +import javax.annotation.Nullable; +import org.apache.pinot.segment.spi.ColumnMetadata; +import org.apache.pinot.segment.spi.index.reader.RangeIndexReader; +import org.apache.pinot.segment.spi.memory.PinotDataBuffer; +import org.apache.pinot.spi.data.FieldSpec; +import org.roaringbitmap.RangeBitmap; +import org.roaringbitmap.RoaringBitmap; +import org.roaringbitmap.buffer.ImmutableRoaringBitmap; + +import static org.apache.pinot.spi.data.FieldSpec.DataType.DOUBLE; +import static org.apache.pinot.spi.data.FieldSpec.DataType.FLOAT; + +public class BitSlicedRangeIndexReader implements RangeIndexReader<ImmutableRoaringBitmap> { + + @SuppressWarnings("rawtypes") + private static final AtomicReferenceFieldUpdater<BitSlicedRangeIndexReader, SoftReference> UPDATER = + AtomicReferenceFieldUpdater.newUpdater(BitSlicedRangeIndexReader.class, SoftReference.class, + "_rangeBitmapRef"); + + private final PinotDataBuffer _dataBuffer; + private final long _offset; + private final long _min; + private final double _scale; + private volatile SoftReference<RangeBitmap> _rangeBitmapRef; + + public BitSlicedRangeIndexReader(PinotDataBuffer dataBuffer, ColumnMetadata metadata) { Review comment: Double/float columns can have dictionary. Sometimes these columns can have low cardinality, and dictionary-encoding gives better performance. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
