[GitHub] [pinot] nizarhejazi commented on a diff in pull request #9173: Proper null handling in equality, inequality and membership operators for all SV column data types

[GitBox]

nizarhejazi commented on code in PR #9173:
URL: https://github.com/apache/pinot/pull/9173#discussion_r939438715


##########
pinot-core/src/main/java/org/apache/pinot/core/operator/dociditerators/SVScanDocIdIterator.java:
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@@ -204,6 +288,34 @@ public int matchValues(int limit, int[] docIds) {
     }
   }
 
+  private class IntMatcherAndNullHandler implements ValueMatcher {
+
+    private final ImmutableRoaringBitmap _nullBitmap;
+    private final int[] _buffer = new int[OPTIMAL_ITERATOR_BATCH_SIZE];
+
+    public IntMatcherAndNullHandler(ImmutableRoaringBitmap nullBitmap) {
+      _nullBitmap = nullBitmap;
+    }
+
+    @Override
+    public boolean doesValueMatch(int docId) {
+      if (_nullBitmap.contains(docId)) {
+        // Any comparison (equality, inequality, or membership) with null 
results in false (similar to Presto) even if

Review Comment:
   For nulls to get considered, one of 4 operators can be used:
   
   1. IS NULL
   2. IS NOT NULL
   3. IS DISTINCT FROM           => We need to implement it in Apache Pinot
   4. IS NOT DISTINCT FROM  => We need to implement it in Apache Pinot
   
   Please check unit tests as they demonstrate the behaviour if IS NULL or IS 
NOT NULL are used.



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