richardstartin commented on code in PR #10254:
URL: https://github.com/apache/pinot/pull/10254#discussion_r1101850816
##########
pinot-core/src/main/java/org/apache/pinot/core/operator/filter/predicate/PredicateUtils.java:
##########
@@ -139,10 +143,40 @@ public static IntSet getDictIdSet(BaseInPredicate
inPredicate, Dictionary dictio
}
break;
case STRING:
- for (String value : values) {
- int dictId = dictionary.indexOf(value);
- if (dictId >= 0) {
- dictIdSet.add(dictId);
+ if (values.size() >
RequestContextUtils.THRESHOLD_OF_LARGE_IN_CLAUSE_VALUES) {
+ if (bloomFilter != null) {
+ for (String value : values) {
+ if (bloomFilter.mightContain(value)) {
+ int dictId = dictionary.indexOf(value);
+ if (dictId >= 0) {
+ dictIdSet.add(dictId);
+ }
+ }
+ }
+ } else {
+ int valueIdx = 0;
+ int dictIdx = 0;
+ while (valueIdx < values.size() && dictIdx < dictionary.length()) {
+ String value = values.get(valueIdx);
+ String dictValue = dictionary.getStringValue(dictIdx);
+ int compareResult = value.compareTo(dictValue);
Review Comment:
Is there a way to make use of the UTF-8 comparison pushdown used in binary
searches? It's defined on `ValueReader` - maybe it could be exposed on
`Dictionary`? Or `Dictionary` could provide methods to fill a set of dictionary
ids given a list of a strings?
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