public boolean equals(HyperLogLog hll) {
    return Arrays.equals(this.serialize(), hll.serialize());
  }
Merges another HyperLogLog instance into this one.

@param other The other HyperLogLog instance to merge
@throws IllegalArgumentException if the precision doesn't match
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/source/relational/aggregation/approximate/HyperLogLog.java