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   1 # void pq\Connection::exec(string $query[, callable $callback])
   2
   3 [Asynchronously](pq/Connection/: Asynchronous Usage) [execute an SQL query](pq/Connection: Executing Queries) on the connection.
   4
   5 > ***NOTE***:
   6   If pq\Connection::$unbuffered is TRUE, each call to pq\Connection::getResult() will generate a distinct pq\Result containing exactly one row.
   7
   8 ## Params:
   9
  10 * string $query
  11   The query to send to the server.
  12 * Optional callable $callback as function(pq\Result $res)
  13   The callback to execute when the query finishes.
  14
  15 ## Throws:
  16
  17 * pq\Exception\InvalidArgumentException
  18 * pq\Exception\BadMethodCallException
  19 * pq\Exception\RuntimeException
  20
  21 ## Example:
  22
  23         <?php
  24
  25         $connection = new pq\Connection;
  26         $connection->execAsync("SELECT 1", function($res) {
  27                 //...
  28         });
  29         $connection->getResult();
  30
  31         ?>