Do we need to specify a shared structures key for each database?

[vedantroy]

If I have 3 databases:

    const root = lmdb.open(path, { sharedStructuresKey: Symbol.for("structures")});
    this.pages = root.openDB({ name: "Page" });
    this.comments = root.openDB({ name: "Comment" });

is it sufficient to specify the shared structures key in the root database only? Or should I do this:

   const STRUCTURES_KEY = Symbol.for("structures");
    const root = lmdb.open(path, { sharedStructuresKey: STRUCTURES_KEY });
    this.pages = root.openDB({ name: "Page", sharedStructuresKey: STRUCTURES_KEY });
    this.comments = root.openDB({ name: "Comment", sharedStructuresKey: STRUCTURES_KEY });

[kriszyp]

You would need to specify the sharedStructuresKey for every database that you want to use that functionality, so the latter would be probably what you want (although if your root database doesn't hold any of its own structured data, you could omit that one).