snazy commented on code in PR #4474:
URL: https://github.com/apache/polaris/pull/4474#discussion_r3286640203
##########
persistence/nosql/persistence/impl/src/main/java/org/apache/polaris/persistence/nosql/impl/indexes/IndexImpl.java:
##########
@@ -904,26 +909,43 @@ public IndexKey key() {
return k;
}
+ @Override
+ public boolean hasNonNullValue() {
+ var state = contentState;
+ if (state == VALUE_STATE_NULL) {
+ return false;
+ }
+ if (state != VALUE_STATE_UNMATERIALIZED) {
+ return true;
+ }
+ var nonNull =
+ !serializer.isNullSerialized(
+ serializedThreadSafe().limit(endOffset).position(valueOffset));
+ if (contentState == VALUE_STATE_UNMATERIALIZED) {
+ contentState = nonNull ? VALUE_STATE_NON_NULL : VALUE_STATE_NULL;
Review Comment:
Went with a `AtomicReferenceFieldUpdater` to avoid an additional object
instance and indirection.
Had to make LazyIndexElement a static class for that, but that's not a
runtime regression.
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