StarRocks, a Linux Foundation project, is a next-generation sub-second MPP OLAP database for full analytics scenarios, including multi-dimensional analytics, real-time analytics, and ad-hoc queries. StarRocks received InfoWorld’s 2023 BOSSIE Award for best open source software.

StarRocks

Hello Folks, I am trying to debug a weird issue with the `hll_hash` function.  `hll_hash` on my `varchar` column always resolves to `NULL` . I made 100% sure that my parquet files have data in the column that I am trying to hash. I am running `3.5.8` wondering if `HLL` is broken somehow in my version or installation. Thanks.

```StarRocks > SELECT HLL_HASH("some_string") as test_hll;
+----------+
| test_hll |
+----------+
| NULL     |
+----------+
1 row in set (0.03 sec)```


ok is this just some presentation logic weirdness? I cannot tell and its super confusing.

great thanks for confirming, let me open an issue, we should either fix this or call it out in the logs.