Get results in wide format

Is there an easy way to call db.exec and get the results in the conventional format:

[
  { "person" : "jerry", "age" : 34 },
  { "person" : "mary", "age": 37 },
  { "person" : "joe", "age" : 63 }
]

I am currently using:

var out = []
var res = db.prepare("SELECT * FROM hello");
while (stmt.step()) out.push(stmt.getAsObject());

But push() can be inefficient. It would be nice to have a shorthand for this.

Start by tracing the db.exec and prepare/step/getAsObject entry points shown in the issue, and inspect how query results are currently assembled. Done means a supported shorthand returns rows in the requested array-of-objects format without requiring the manual loop.