Description:
------------
When fetching data from a MySQL database, the type of the field is ignored and the column data is always returned as a string. Constrast this with the PostgreSQL driver which does return the type of the field.

The test script below demonstrates an integer field is retruned as a string for MySQL but properly returned as an int for PostgreSQL.

Test script:
---------------
<?php

$db = new PDO('pgsql:dbname=test', 'postgres');

$db->exec('DROP TABLE IF EXISTS test_table');
$db->exec('CREATE TABLE test_table (field integer)');

$db->exec('INSERT INTO test_table VALUES (5)');
$stmt = $db->query('SELECT * FROM test_table');
var_dump($stmt->fetch());



$db = new PDO('mysql:dbname=test', 'postgres');

$db->exec('DROP TABLE IF EXISTS test_table');
$db->exec('CREATE TABLE test_table (field integer)');

$db->exec('INSERT INTO test_table VALUES (5)');
$stmt = $db->query('SELECT * FROM test_table');
var_dump($stmt->fetch());


Expected result:
----------------
array(2) {
  'field' =>
  int(5)
  [0] =>
  int(5)
}
array(2) {
  'field' =>
  int(5)
  [0] =>
  int(5)
}


Actual result:
--------------
array(2) {
  'field' =>
  int(5)
  [0] =>
  int(5)
}
array(2) {
  'field' =>
  string(1) "5"
  [0] =>
  string(1) "5"
}