amansinha100 commented on a change in pull request #1334: DRILL-6385: Support JPPD feature URL: https://github.com/apache/drill/pull/1334#discussion_r205982746
########## File path: exec/java-exec/src/main/java/org/apache/drill/exec/work/filter/BloomFilterCreator.java ########## @@ -0,0 +1,41 @@ +/* + * 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.drill.exec.work.filter; + +import io.netty.buffer.DrillBuf; +import org.apache.drill.exec.memory.BufferAllocator; + +public class BloomFilterCreator { Review comment: Hmm...if the 2 columns create separate bloom filters, where does the ANDing (intersection) of the two BFs happen ? In the current implementation there's an ORing of the BFs but I did not see ANDing (maybe I missed, so let me know). As far as the memory usage is concerned, we can continue down this path and evaluate both CPU cost and memory usage for multi-column joins where the cardinality of the columns ranges from low to high. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
