suneet-amp commented on a change in pull request #8822: optimize numeric column 
null value checking for low filter selectivity (more rows)

 File path: 
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+ * 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
+ *
+ *
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.druid.collections.bitmap;
+import org.roaringbitmap.IntIterator;
+import org.roaringbitmap.PeekableIntIterator;
+public class PeekableIteratorAdapter<TIntIterator extends IntIterator> 
implements PeekableIntIterator
+  static final int NOT_SET = -1;
+  final TIntIterator baseIterator;
+  int mark = NOT_SET;
 Review comment:
   nit: `mark` was confusing for me to understand. Is this `nextVal`?

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