More cynically, I suspect that many low-quality database projects succeed or fail based more on marketing and hype than robustness. A dishonest product could simply take the line "engineers at Orkes were able to produce a highly sophisticated database system" from the report out of context, quote it on their homepage attributed to aphyr/Kyle/Jepsen, and reap short-term rewards and popularity. I hope I'm wrong.
(Edit for clarity: this is quoted from the linked article)
You could write predicates over non-existent columns:
root=> SELECT * FROM t
WHERE definitely_not_a_column = 4;
a | b
---+----
4 | 5
(1 row)
Or ask if 4 = 5
root=> SELECT * FROM t WHERE 4 = 5;
a | b
---+----
5 | 6
(1 row)
It must have been darkly amusing to see all these defect tickets coming in, only for them to frantically shovel each one to increasingly overworked LLM agents to apply pig-lipstick while the humans in charge oh-so-slowly start to realize their software quality is not quite what their glazing agents had been telling them and that what they have on their hands is basically sub-mongo-quality slop. What a world we live in, huh?
I complain that mainstream SQL engines have no problem returning less than the total number of rows if you first query WHERE column = NULL and then query WHERE column <> NULL. Your example queries remind me of that.
[1] https://medium.com/dailyjs/the-why-behind-the-wat-an-explana...
> WHERE column = NULL and then query WHERE column <> NULL
NULL means what it means and is conceptually foundational to SQL. Comparing it to anything returns UNKNOWN, the “third value” besides true and false. And WHERE needs a TRUE predicate. So your implied fault that they “have no problem“ really is just a matter of you not understanding the tool you are complaining about.
To match against the NULLness of a value you must use special purpose operators. In this case
WHERE column IS NULL OR column IS NOT NULL You could write predicates over non-existent columns:
root=> SELECT * FROM t
WHERE definitely_not_a_column = 4;
SELECT * FROM t WHERE 4 = 5;
a | b
---+----
5 | 6
(1 row)
System.out.println(((Integer)4).compareTo((Integer)5));
> -1
So it's SELECT FROM t WHERE true;
Now, let's get busy blaming Jepsen for using the tool wrong.
No, therefore the condition is unsatisfiable and equivalent to WHERE FALSE. And that's letting you ignore the SQL spec, which says the query is invalid and should return "Column not found" because the column name cannot be resolved.
> We're comparing 4 and 5. Precedent?
I really hope you're trolling, for your own sake.
It takes gumption to build a new storage engine. I remember when etcd[0] first made it's way into @aphyr's cross-hairs. We took all of the input very seriously because we knew that a data store which is untrustworthy is useless.
Resolving these issues likely won't be easy, but if you can get to the point where you walk away from Jepsen unscathed the trust in your software will be greatly amplified.
0: https://aphyr.com/posts/316-call-me-maybe-etcd-and-consul
Especially now, where you could probably just ask AI to adapt the existing suites to the cosnistency claims this database makes, and get something useful out of it. While certainly not as good as a professional test, I'd expect it to at least find some low hanging fruits before going for the expensive and public official Jepsen test.
"Orkes said they ran Jepsen’s existing Postgres test harness to find and resolve issues in ParticleDB prior to this work. However, that same test harness failed immediately when run against ParticleDB 1.1.4. Orkes also stated they tested ParticleDB with SQLancer, which generates far more complex queries than the ones we tested. It is therefore perplexing that nearly every feature we tested exhibited glaring errors, and that our findings seemed to come as a surprise."
This is such a huge reputational hit, seems like a terrible outcome for a Series B company funded by big name VCs
What does this say about their main product?
I can see it happening if they genuinely had no idea of how defective / non-existent their internal QA & testing processes were.
"Written in Rust · Formally Verified · PostgreSQL Compatible"