#mixed pq\Query\ExecutorInterface pq\Query\ExecutorInterface::execute(\pq\Query\WriterInterface $query, callable $callback);

Execute the query and process the result with the callback.

NOTE:
This method should notify the observers twice.
Once before the query gets executed and can be retrieved by pq\Query\ExecutorInterface::getQuery().
And once after executing the query and the result can be retrieved by pq\Query\ExecutorInterface::getResult().

Params:#

• pq\Query\WriterInterface $query#
  The query to execute.
• callable $callback#
  The result processing callback as function(pq\Result $result#)

Returns:#

• mixed, the return value of the callback.