Zero-copy result row

[penberg]

We now keep even strings as byte vector in OwnedValue. Next step is to teach OwnedValue about blobs and strings that are managed by someone else and the figure out if we can just pin the btree page somehow and point there. This would be essentially zero-copy to return result row to apps, following SQLite's design.

[pedrocarlo]

Hi @penberg. Do you know in what situations SQLite values should be static and not dynamic? Because I was trying to find it in sqlite source code, but it was not obvious to me the flow of data where the static data is referenced and when it will not be used anymore. This would help me understand the lifetime of the value so that I can attempt to do a zerocopy operation.