[GitHub] [pinot] 61yao commented on a diff in pull request #10598: [feature] [null support # 9] Support null in time related transform functions.

["61yao (via GitHub)" <gi...@apache.org>]

61yao commented on code in PR #10598:
URL: https://github.com/apache/pinot/pull/10598#discussion_r1184563096


##########
pinot-core/src/main/java/org/apache/pinot/core/operator/transform/function/CoalesceTransformFunction.java:
##########
@@ -399,4 +390,22 @@ public String[] transformToStringValuesSV(ValueBlock valueBlock) {
     }
     return getStringTransformResults(valueBlock);
   }
+
+  @Override
+  public RoaringBitmap getNullBitmap(ValueBlock valueBlock) {
+    RoaringBitmap[] nullBitMaps = getNullBitMaps(valueBlock, _transformFunctions);
+    RoaringBitmap bitmap = nullBitMaps[0];
+    for (int i = 1; i < nullBitMaps.length; i++) {
+      RoaringBitmap curBitmap = nullBitMaps[i];
+      if (bitmap != null && curBitmap != null) {
+        bitmap.and(curBitmap);
+      } else {
+        bitmap = null;

Review Comment:
   This doesn't belong to this PR either..



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