Error 1064 <42000> on mysql when selecting using double quoted strings - php

Question

The query produced by Zend Framework 2:
SELECT "uc".*, "c".* FROM "user_contacts" AS "uc" INNER JOIN "contacts" AS "c" ON "uc"."contact_id" = "c"."contact_id" WHERE "uc"."user_id" = '2' AND "c"."user_id" = '1';
results in this error (when run on command line):
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.*, "c".* FROM "user_contacts" AS "uc" INNER JOIN "contacts" AS "c" ON "uc"."con' at line 1
This query (exact same query minus double quotes) runs fine:
SELECT uc.*, c.* FROM user_contacts AS uc INNER JOIN contacts AS c ON uc.contact_id = c.contact_id WHERE c.user_id = 2 AND uc.user_id = 1;
+---------+------------+------------+---------+
| user_id | contact_id | contact_id | user_id |
+---------+------------+------------+---------+
| 1 | 7 | 7 | 2 |
+---------+------------+------------+---------+
1 row in set (0.00 sec)
Why is this so and how can I fix this?
Using AMP stack on Ubuntu 12.10.
Tables look like so:
CREATE TABLE `contacts` (
`contact_id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
PRIMARY KEY (`contact_id`),
UNIQUE KEY `contact_id_UNIQUE` (`contact_id`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8
CREATE TABLE `user_contacts` (
`user_id` int(11) NOT NULL,
`contact_id` int(11) NOT NULL,
PRIMARY KEY (`user_id`,`contact_id`),
KEY `user_contacts_user_id_fkey_idx` (`user_id`),
KEY `user_contacts_contact_id_idx` (`contact_id`),
CONSTRAINT `user_contacts_contact_id_fkey` FOREIGN KEY (`contact_id`) REFERENCES `contacts` (`contact_id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `user_contacts_user_id_fkey` FOREIGN KEY (`user_id`) REFERENCES `user` (`user_id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=utf8
Zend db adapter code:
return array(
'db' => array(
'driver' => 'Pdo',
'dsn' => 'mysql:dbname=' . $dbName . ';host=' . $host,
'driver_options' => array(
PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\''
),
),
'service_manager' => array(
'factories' => array(
'Zend\Db\Adapter\Adapter'
=> 'Zend\Db\Adapter\AdapterServiceFactory',
),
),
);
Select code:
public function checkIfFriends($currentUserId,$requestedUserId) {
$currentUserId = (int) $currentUserId;
$requestedUserId = (int) $requestedUserId;
$sql = new Sql($this->tableGateway->getAdapter());
$select = $sql->select();
$select->from(array('uc' => $this->tableGateway->getTable()))
->join(array('c' => 'contacts'), 'uc.contact_id = c.contact_id');
$where = new Where();
$where
->equalTo('uc.user_id', $currentUserId)
->equalTo('c.user_id', $requestedUserId);
$select->where($where);
//echo $select->getSqlString();
$rowSet = $this->tableGateway->selectWith($select);
$row = $rowSet->current();
return ($row) ? true: false;
}
Why has this been closed as a exact duplicate? it isn't. I understand the problem might be the same but ZF2 is producing a query which doesn't run due to the quoting.

Answer 1

Solution as found in this Zend Framework forum post:
Works but is not really an acceptable solution, a better solution would be much appreciated.
public function checkIfFriends($currentUserId,$requestedUserId) {
$currentUserId = (int) $currentUserId;
$requestedUserId = (int) $requestedUserId;
$sql = new Sql($this->tableGateway->getAdapter());
$select = $sql->select();
$select->from(array('uc' => $this->tableGateway->getTable()))
->join(array('c' => 'contacts'), 'uc.contact_id = c.contact_id');
$where = new Where();
$where
->equalTo('uc.user_id', $currentUserId)
->equalTo('c.user_id', $requestedUserId);
$select->where($where);
$dbAdapter = $this->tableGateway->getAdapter();
$string = $sql->getSqlStringForSqlObject($select);
$rowSet = $dbAdapter->query($string, $dbAdapter::QUERY_MODE_EXECUTE);
$row = $rowSet->current();
return ($row) ? true: false;
}

Answer 2

I solved this problem by turning off the dead key settings in the OS.
How to do this in Linux Mint: http://forums.linuxmint.com/viewtopic.php?f=55&t=97812