Jackie-Jiang commented on code in PR #12164:
URL: https://github.com/apache/pinot/pull/12164#discussion_r1433107168
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/startree/v2/builder/BaseSingleTreeBuilder.java:
##########
@@ -133,7 +133,9 @@ static class Record {
"Dimension: " + dimension + " does not have dictionary");
}
- TreeMap<AggregationFunctionColumnPair, AggregationSpec> aggregationSpecs =
builderConfig.getAggregationSpecs();
+ TreeMap<AggregationFunctionColumnPair, AggregationSpec> aggregationSpecs =
+
StarTreeBuilderUtils.deduplicateAggregationSpecs(builderConfig.getAggregationSpecs());
Review Comment:
Similarly can we directly resolve the `AggregationFunctionType` within the
builder config?
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/aggregator/DistinctCountHLLPlusValueAggregator.java:
##########
@@ -31,6 +31,7 @@
public class DistinctCountHLLPlusValueAggregator implements
ValueAggregator<Object, HyperLogLogPlus> {
public static final DataType AGGREGATED_VALUE_TYPE = DataType.BYTES;
+ public static final AggregationFunctionType AGGREGATION_FUNCTION_TYPE =
AggregationFunctionType.DISTINCTCOUNTHLL;
Review Comment:
This is incorrect. It should be `DISTINCTCOUNTHLLPLUS`, which explains why
the test failed
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/store/StarTreeIndexReader.java:
##########
@@ -121,7 +124,9 @@ private void mapBufferEntries(int starTreeId,
_dataBuffer, ByteOrder.BIG_ENDIAN));
}
// Load metric (function-column pair) forward indexes
- for (AggregationFunctionColumnPair functionColumnPair :
starTreeMetadata.getFunctionColumnPairs()) {
+ TreeMap<AggregationFunctionColumnPair, AggregationSpec>
deduplicatedAggregationSpecs =
Review Comment:
Can we do this at `StarTreeV2Metadata` loading time (in the constructor),
essentially keeping the stored `AggregationFunctionType` within
`AggregationFunctionColumnPair`
##########
pinot-segment-spi/src/main/java/org/apache/pinot/segment/spi/index/startree/AggregationSpec.java:
##########
@@ -50,4 +52,10 @@ public boolean equals(Object o) {
public int hashCode() {
return _compressionType.hashCode();
}
+
+ @Override
+ public String toString() {
+ return new ToStringBuilder(this,
ToStringStyle.SHORT_PREFIX_STYLE).append("compressionType", _compressionType)
+ .toString();
Review Comment:
(minor) Is this for debugging purpose? We usually use the IDE auto-generated
one
```suggestion
return "AggregationSpec{" + "_compressionType=" + _compressionType + '}';
```
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