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I am looking to "upsert" `hll`'s in my database, using a traditional two stage query:
```sql
# Add an empty HLL if one doesn't exist
INSERT INTO counts(event_type, reference, count)
VALUES(:eve…
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Hi Rockstars,
This is a list of proposed Hands-on tasks. If you're new to StarRocks and eager to engage with the community, here are some issues that are well-suited for you to dive into :) These …
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Hi,
I have a question about the output from HLL, when I use Dashing with HyperLogLog i.e.:
**./dashing hll -k15 -p2 -S24 read.fastq reference.fasta**
The output from HLL is then:
**Estimat…
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我批量插入50万条数据, 成功了, 然后在终端ctrl+c退出, 再次lealone启动成功, 但是执行User.dao.findCount() 时报错. 应该是之前建的user表被删除了, runSqlScript重建表也报错, 必须把data文件夹里的数据删除后runSqlScript才成功
报错log信息:
INFO [TcpServer-ShutdownHook-3] [2021-1…
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I've found a condition where a NoSuchMethodError can be thrown. Below is what I do to get it to trigger (I hope you don't mind that it's in scala). I am using hll version 1.6.0 out of maven.
``` sc…
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Currently, we track the number of views per project using [ahoy gem](https://github.com/ankane/ahoy). This requires storing user ip addresses(optional), user agents and other user data in the database…
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A union operation done on two HLL objects immediately after they are initialized, with a smaller log2m in the parameter HLL than the one doing the union, throws an ArrayIndexOutOfBoundsException. The …
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I suspect this is a sort of edge case in the HLL approximation algo, but it seems there should be a better way to surface this than this exception.
I've reconstructed the case as reported, coming up …
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The unittest for the hyperloglog is instable and fails every now and then with this error:
```
___________________________ test_simple_hyperloglog ____________________________
def test_simple_hy…
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有关hyperloglog 论文
http://algo.inria.fr/flajolet/Publications/FlFuGaMe07.pdf
主要介绍基数统计算法及数学原理
https://arxiv.org/pdf/1702.01284.pdf
新的计算方法来改进原算法在数量较少或者较大时候的误差。
:question: #define HLL_DENSE_SI…