Jackie-Jiang commented on code in PR #10231:
URL: https://github.com/apache/pinot/pull/10231#discussion_r1098055170
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/startree/v2/builder/BaseSingleTreeBuilder.java:
##########
@@ -131,7 +132,7 @@ static class Record {
"Dimension: " + dimension + " does not have dictionary");
}
- Set<AggregationFunctionColumnPair> functionColumnPairs =
builderConfig.getFunctionColumnPairs();
+ Set<AggregationFunctionColumnPair> functionColumnPairs = new
TreeSet<>(builderConfig.getFunctionColumnPairs());
Review Comment:
This extra map is redundant as the builder config already create the pairs
as `TreeSet`
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/startree/v2/store/StarTreeIndexMapUtils.java:
##########
@@ -112,6 +112,14 @@ public boolean equals(@Nullable Object obj) {
return false;
}
}
+
+ @Override
+ public int compareTo(IndexKey other) {
+ return Comparator
+ .comparing((IndexKey i) -> i._column,
Comparator.nullsLast(Comparator.naturalOrder()))
+ .thenComparing((IndexKey i) -> i._indexType,
Comparator.nullsLast(Comparator.naturalOrder()))
Review Comment:
(minor) index type cannot be null
##########
pinot-segment-spi/src/main/java/org/apache/pinot/segment/spi/index/startree/AggregationFunctionColumnPair.java:
##########
@@ -86,4 +87,12 @@ public boolean equals(Object obj) {
public String toString() {
return toColumnName();
}
+
+ @Override
+ public int compareTo(AggregationFunctionColumnPair other) {
+ return Comparator.comparing((AggregationFunctionColumnPair o) -> o._column,
+ Comparator.nullsLast(Comparator.naturalOrder()))
Review Comment:
(minor) neither of these 2 fields can be null
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/startree/v2/builder/StarTreeIndexCombiner.java:
##########
@@ -54,7 +54,7 @@ public StarTreeIndexCombiner(File indexFile)
*/
public Map<IndexKey, IndexValue> combine(StarTreeV2BuilderConfig
builderConfig, File starTreeIndexDir)
throws IOException {
- Map<IndexKey, IndexValue> indexMap = new HashMap<>();
+ Map<IndexKey, IndexValue> indexMap = new TreeMap<>();
Review Comment:
Suggest making it a `List<Pair<IndexKey, IndexValue>>` instead of a
`TreeMap` because we don't need to dedup
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