WangCHX commented on code in PR #8498: URL: https://github.com/apache/pinot/pull/8498#discussion_r851047468
########## pinot-core/src/main/java/org/apache/pinot/core/operator/filter/H3InclusionIndexFilterOperator.java: ########## @@ -0,0 +1,128 @@ +/** + * 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.core.operator.filter; + +import it.unimi.dsi.fastutil.longs.LongSet; +import java.util.Collections; +import java.util.List; +import org.apache.pinot.common.request.context.ExpressionContext; +import org.apache.pinot.common.request.context.ExpressionContext.Type; +import org.apache.pinot.common.request.context.predicate.Predicate; +import org.apache.pinot.core.common.Operator; +import org.apache.pinot.core.operator.blocks.FilterBlock; +import org.apache.pinot.core.operator.dociditerators.ScanBasedDocIdIterator; +import org.apache.pinot.core.operator.docidsets.BitmapDocIdSet; +import org.apache.pinot.segment.local.utils.GeometrySerializer; +import org.apache.pinot.segment.local.utils.H3Utils; +import org.apache.pinot.segment.spi.IndexSegment; +import org.apache.pinot.segment.spi.index.reader.H3IndexReader; +import org.apache.pinot.spi.utils.BytesUtils; +import org.locationtech.jts.geom.Geometry; +import org.roaringbitmap.buffer.BufferFastAggregation; +import org.roaringbitmap.buffer.ImmutableRoaringBitmap; +import org.roaringbitmap.buffer.MutableRoaringBitmap; + + +/** + * A filter operator that uses H3 index for geospatial data inclusion + */ +public class H3InclusionIndexFilterOperator extends BaseFilterOperator { + + private static final String EXPLAIN_NAME = "INCLUSION_FILTER_H3_INDEX"; + + private static final String OPERATOR_NAME = "H3InclusionIndexFilterOperator"; + + private final IndexSegment _segment; + private final Predicate _predicate; + private final int _numDocs; + private final H3IndexReader _h3IndexReader; + private final LongSet _h3Ids; + + public H3InclusionIndexFilterOperator(IndexSegment segment, Predicate predicate, int numDocs) { + _segment = segment; + _predicate = predicate; + _numDocs = numDocs; + + List<ExpressionContext> arguments = predicate.getLhs().getFunction().getArguments(); + Geometry geometry; + // Assume first argument is Literal, and second argument is IDENTIFIER for St_Contains. + assert arguments.get(1).getType() == Type.IDENTIFIER; + assert arguments.get(0).getType() == Type.LITERAL; + // look up arg1's h3 indices + _h3IndexReader = segment.getDataSource(arguments.get(1).getIdentifier()).getH3Index(); + // arg0 is the literal + geometry = GeometrySerializer.deserialize(BytesUtils.toBytes(arguments.get(0).getLiteral())); + // must be some h3 index + assert _h3IndexReader != null; + + // get the set of H3 cells at the specified resolution which completely cover the input shape. + _h3Ids = H3Utils.coverGeometryInH3(geometry, _h3IndexReader.getH3IndexResolution().getLowestResolution()); + } + + @Override + protected FilterBlock getNextBlock() { + // have list of h3 cell ids for polygon provided + // return filtered num_docs + ImmutableRoaringBitmap[] partialMatchDocIds = new ImmutableRoaringBitmap[_h3Ids.size()]; + int i = 0; + for (long h3IndexId : _h3Ids) { + partialMatchDocIds[i++] = _h3IndexReader.getDocIds(h3IndexId); + } + MutableRoaringBitmap mutableRoaringBitmap = BufferFastAggregation.or(partialMatchDocIds); Review Comment: https://github.com/apache/pinot/issues/8547 -- 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: commits-unsubscr...@pinot.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org
