amansinha100 commented on a change in pull request #1334: DRILL-6385: Support 
JPPD feature
URL: https://github.com/apache/drill/pull/1334#discussion_r205982746
 
 

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 File path: 
exec/java-exec/src/main/java/org/apache/drill/exec/work/filter/BloomFilterCreator.java
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 @@ -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
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+ * 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.
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+ * 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.  

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