#void pq\Cursor::fetchAsync([string $spec = "1"[, callable $callback = NULL]])

Asynchronously fetch rows from the cursor. See pq\Cursor::fetch().

Params:#

• Optional string $spec# = "1"
  What to fetch.
• Optional callable $callback# as function(pq\Result $res#)
  A callback to execute when the result is ready.

Throws:#

• pq\Exception\InvalidArgumentException
• pq\Exception\BadMethodCallException
• pq\Exception\RuntimeException