gianm commented on a change in pull request #10313:
URL: https://github.com/apache/druid/pull/10313#discussion_r476192895
##########
File path:
processing/src/main/java/org/apache/druid/query/filter/InDimFilter.java
##########
@@ -80,7 +80,8 @@
{
// determined through benchmark that binary search on long[] is faster than
HashSet until ~16 elements
// Hashing threshold is not applied to String for now, String still uses
ImmutableSortedSet
- public static final int NUMERIC_HASHING_THRESHOLD = 16;
+ public static final int NUMERIC_HASHING_THRESHOLD =
+
Integer.parseInt(System.getProperty("druid.query.filter.inDimFilter.numericHashingThreshold",
"1"));
Review comment:
I don't think we should have a property for this, but if we did, it
should be set through Guice injection rather than through System.getProperty.
That way, it'd work in either a runtime props file or a system property.
We won't actually see "1" in practice AFAIK, since `optimize()` will get
run, and that'll turn the In filter into a Selector filter.
So if this is the right default, I think it'd be better to remove the code.
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