Missing data types in Client APIs

[andyfengHKU]

Based on user report

For C API, we are missing

• RECURSIVE_REL
• SERIAL
• ARROW_COLUMN
• BLOB
• MAP
• UNION

The above types may also be missing in other APIs.

Note that for MAP and UNION, we haven't fully implemented, so no functions should be exposed for these two types. Just include them in type switch.

[benjaminwinger]

Rust API as far as I'm aware is missing:

• RECURSIVE_REL (mostly done, I'll open a PR soon)
• ARROW_COLUMN
• MAP
• UNION

[andyfengHKU]

Just to follow up. We shouldn't expose API functions of ARROW_COLUMN neither.

[benjaminwinger]

RECURSIVE_REL also seems to be missing from the C++ API and/or docs. You can access it like a struct, and it's fairly straightforward to do so, but there's no documentation of its structure. Having a wrapper like NodeVal and RelVal do would be helpful and would provide a natural place to document it.

[andyfengHKU]

RECURSIVE_REL also seems to be missing from the C++ API and/or docs. You can access it like a struct, and it's fairly straightforward to do so, but there's no documentation of its structure. Having a wrapper like NodeVal and RelVal do would be helpful and would provide a natural place to document it.

Good point. Do you want to do it? Maybe wrap as PathVal.

[mewim]

In C and Java API we provide utility functions:

https://github.com/kuzudb/kuzu/blob/master/tools/java_api/src/main/java/com/kuzudb/KuzuValueRecursiveRelUtil.java#L6

https://github.com/kuzudb/kuzu/blob/master/src/c_api/value.cpp#L166

I think maybe we can just create another static class similar to NodeVal and RelVal for C++. No need for another wrapper.

I can work on that.

[mewim]

Done in #1814