How to query for * in table and just get Vec2<String>

[djkato]

Hello!
I'm writing a generic database helper app, and I would like to find a way to convert whatever table entries into a vec<vec> type.
Been reading around trying to find how but I can't figure it out.
Right now I am creating a connection and doing xsql::query("select * from x").fetch_all(connection).await. I understand that usually this command is paired with a struct with derived fromRow, but I will never know what table I am actually querying during runtime, so I cannot do that. I read a few posts about how to create ones own FromRow implementation, but I don't need to map it to struct fields. Just the raw data in vec2 form.
I would also like to know how I can parse the query DESCRIBE table. The only way I found right now involves knowing the database name, which I don't during runtime.

#[derive(FromRow)]
struct QRTables {
    #[sqlx(rename = "Tables_in_[table name]")]
    tables_in_[table name]: String,
}

How could I do this, is it possible? If not why? With the no knowledge I have it feels like that would be an easy function to provide.

Thanks!