richardstartin commented on a change in pull request #7454: URL: https://github.com/apache/pinot/pull/7454#discussion_r712556088
########## File path: pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/creator/impl/inv/BitSlicedRangeIndexCreator.java ########## @@ -0,0 +1,168 @@ +/** + * 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.creator.impl.inv; + +import java.io.File; +import java.io.IOException; +import org.apache.pinot.segment.spi.ColumnMetadata; +import org.apache.pinot.segment.spi.index.creator.CombinedInvertedIndexCreator; +import org.apache.pinot.spi.data.FieldSpec; +import org.roaringbitmap.RangeBitmap; + +import static org.apache.pinot.segment.spi.V1Constants.Indexes.BITMAP_RANGE_INDEX_FILE_EXTENSION; +import static org.apache.pinot.spi.data.FieldSpec.DataType.*; + +public class BitSlicedRangeIndexCreator implements CombinedInvertedIndexCreator { + + public static final int RANGE_INDEX_VERSION = 2; + + private final RangeBitmap.Appender _appender; + private final File _rangeIndexFile; + private final FieldSpec.DataType _valueType; + private final long _minValue; + private final double _scale; + + public BitSlicedRangeIndexCreator(File indexDir, ColumnMetadata metadata) { + _appender = RangeBitmap.appender(maxValue(metadata)); + _rangeIndexFile = new File(indexDir, metadata.getColumnName() + BITMAP_RANGE_INDEX_FILE_EXTENSION); + _valueType = metadata.getDataType(); + _minValue = minValue(metadata); + _scale = scale(metadata); + } + + @Override + public void add(int dictId) { + _appender.add(dictId - _minValue); + } + + @Override + public void add(int[] dictIds, int length) { + } + + @Override + public void add(long value) { + _appender.add(value - _minValue); + } + + @Override + public void add(long[] values, int length) { + } + + @Override + public void add(float value) { + if (!Float.isFinite(value)) { + // TODO this probably needs better handling, like using a 24th slice + // for infinite values + _appender.add(0); + } else { + double d = value; + d -= Double.longBitsToDouble(_minValue); + d *= _scale; + _appender.add(Float.floatToIntBits((float) d)); + } + } + + @Override + public void add(float[] values, int length) { + } + + @Override + public void add(double value) { + if (!Double.isFinite(value)) { + // TODO this probably needs better handling, like using a 57th slice + // for infinite values + _appender.add(0L); + } else { + value -= Double.longBitsToDouble(_minValue); + value *= _scale; + _appender.add(Double.doubleToLongBits(value)); + } + } + + @Override + public void add(double[] values, int length) { + } + + @Override + public void seal() throws IOException { + int headerSize = Integer.BYTES + Long.BYTES + (_valueType == FLOAT || _valueType == DOUBLE ? Double.BYTES : 0); + int serializedSize = _appender.serializedSizeInBytes(); + try (MmapFileWriter writer = new MmapFileWriter(_rangeIndexFile, headerSize + serializedSize)) { + writer.write(buf -> { + buf.putInt(RANGE_INDEX_VERSION); + buf.putLong(_minValue); + if (_valueType == FLOAT || _valueType == DOUBLE) { + buf.putDouble(_scale); + } + _appender.serialize(buf); + }); + } + _appender.clear(); + } + + @Override + public void close() throws IOException { + + } + + private static long maxValue(ColumnMetadata metadata) { + FieldSpec.DataType dataType = metadata.getDataType(); + if (dataType == LONG || dataType == INT) { + Comparable<?> minValue = metadata.getMinValue(); + Comparable<?> maxValue = metadata.getMaxValue(); + if (minValue instanceof Number && maxValue instanceof Number) { + return ((Number) maxValue).longValue() - ((Number) minValue).longValue(); + } + } + if (dataType == DOUBLE) { + return 1L << 55; + } + if (dataType == FLOAT) { + return 1L << 22; + } + return Long.MAX_VALUE; Review comment: This should be the maximum dictionary code -- This is an automated message from the Apache Git Service. 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