refactor(sqlite): make background thread responsible for all FFI calls #1551
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This is a significant refactor but is almost entirely internal and should be completely backwards-compatible.
There's a couple things I'm still debating, like merging
SqliteValue
andSqliteArgumentValue
. It doesn't make much sense to usesqlite3_value_dup
to sendsqlite3_value
s back to the main thread when we could just eagerly convert them to their equivalent Rust types, especially since the former is going to always be heap-allocated.On further consideration, I think I'll keep
SqliteValue
as it is because it technically allows access to SQLite's weak typing system by getting a value as a different type than it actually is.Closes #634
Closes #1175
Closes #1467