gianm commented on code in PR #12627:
URL: https://github.com/apache/druid/pull/12627#discussion_r894650357
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processing/src/main/java/org/apache/druid/segment/serde/DictionaryEncodedStringIndexSupplier.java:
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@@ -77,42 +78,45 @@ public DictionaryEncodedStringIndexSupplier(
this.dictionaryUtf8 = dictionaryUtf8;
this.bitmaps = bitmaps;
this.indexedTree = indexedTree;
+ this.zeroIsNull = NullHandling.isNullOrEquivalent(dictionary.get(0));
Review Comment:
Will this materially slow down historical startup time? If so: lazily
compute instead of eagerly (like `minTime`, `maxTime` in
QueryableIndexStorageAdapter).
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processing/src/main/java/org/apache/druid/segment/virtual/ListFilteredVirtualColumn.java:
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@@ -357,6 +357,30 @@ public ImmutableBitmap next()
}
}
+ private static class ListFilteredNullValueIndex extends
BaseListFilteredColumnIndex implements NullValueIndex
Review Comment:
Do we have tests for "is null" filters on ListFilteredVirtualColumn? If not,
should add them as part of this patch since it's now its own code path.
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