swaminathanmanish commented on code in PR #10427:
URL: https://github.com/apache/pinot/pull/10427#discussion_r1139002821
##########
pinot-core/src/main/java/org/apache/pinot/core/function/scalar/SketchFunctions.java:
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@@ -131,4 +133,49 @@ public static byte[] toHLL(@Nullable Object input, int
log2m) {
}
return ObjectSerDeUtils.HYPER_LOG_LOG_SER_DE.serialize(hll);
}
+
+ /**
+ * Create a Tuple Sketch containing the key and value supplied
+ *
+ * @param key an Object we want to insert as the key of the sketch, may be
null to return an empty sketch
+ * @param value an Integer we want to associate as the value to go along
with the key, may be null to return an
+ * empty sketch
+ * @return serialized tuple sketch as bytes
+ */
+ @ScalarFunction(nullableParameters = true)
+ public static byte[] toIntegerSumTupleSketch(@Nullable Object key, @Nullable
Integer value) {
+ return toIntegerSumTupleSketch(key, value,
CommonConstants.Helix.DEFAULT_TUPLE_SKETCH_LGK);
+ }
+
+ /**
+ * Create a Tuple Sketch containing the key and value supplied
+ *
+ * @param key an Object we want to insert as the key of the sketch, may be
null to return an empty sketch
+ * @param value an Integer we want to associate as the value to go along
with the key, may be null to return an
+ * empty sketch
+ * @param lgK integer representing the log of the maximum number of retained
entries in the sketch, between 4 and 26
+ * @return serialized tuple sketch as bytes
+ */
+ @ScalarFunction(nullableParameters = true)
+ public static byte[] toIntegerSumTupleSketch(@Nullable Object key, Integer
value, int lgK) {
+ IntegerSketch is = new IntegerSketch(lgK, IntegerSummary.Mode.Sum);
+ if (value != null) {
+ if (key instanceof Integer) {
Review Comment:
Can the key be null ?
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