Re: [DISCUSS] New data type for vector search

[Benedict]

That’s a bounded ring buffer, not a fixed length array. This definitely isn’t a tuple because the types are all the same, which is pretty crucial for matrix operations. Matrix libraries generally work on arrays of known dimensionality, or sparse representations. Whether we draw any semantic link between the frozen list and whatever we do here, it is fundamentally a frozen list with a restriction on its size. What we’re defining here are “statically” sized arrays, whereas a frozen list is essentially a dynamically sized array. I do not think vector is a good name because vector is used in some other popular languages to mean a (dynamic) list, which is confusing when we also have a list concept. I’m fine with just using the FLOAT[N] syntax, and drawing no direct link with list. Though it is a bit strange that this particular type declaration looks so different to other collection types. On 27 Apr 2023, at 16:48, Jeff Jirsa <jji...@gmail.com> wrote:  On Thu, Apr 27, 2023 at 7:39 AM Jonathan Ellis <jbel...@gmail.com> wrote: It's been a while, so I may be missing something, but do we already have fixed-size lists?  If not, I don't see why we'd try to make this fit into a List-shaped problem. We do not. The proposal got closed as wont-fix  https://issues.apache.org/jira/browse/CASSANDRA-9110