[GitHub] [pinot] nizarhejazi commented on a diff in pull request #8927: Proper null handling in SELECT, ORDER BY, DISTINCT, and GROUP BY

[GitBox]

nizarhejazi commented on code in PR #8927:
URL: https://github.com/apache/pinot/pull/8927#discussion_r917457959


##########
pinot-core/src/main/java/org/apache/pinot/core/operator/docvalsets/ProjectionBlockValSet.java:
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@@ -50,6 +53,26 @@ public ProjectionBlockValSet(DataBlockCache dataBlockCache, 
String column, DataS
     _dataBlockCache = dataBlockCache;
     _column = column;
     _dataSource = dataSource;
+    NullValueVectorReader nullValueReader = _dataSource == null ? null : 
_dataSource.getNullValueVector();

Review Comment:
   Updated to the computation lazily. 
   
   Please note that passing whether query has null handling enabled is tedious 
(need to pass QueryContext through many classes). Let me know if you still 
prefer to pass it through.



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