Binding a date string parameter in an MS Access PDO query
- by harryg
I've made a PDO database class which I use to run queries on an MS Access database.
When querying using a date condition, as is common in SQL, dates are passed as a string. Access usually expects the date to be surrounded in hashes however. E.g.
SELECT transactions.amount FROM transactions WHERE transactions.date = #2013-05-25#;
If I where to run this query using PDO I might do the following.
//instatiate pdo connection etc... resulting in a $db object
$stmt = $db->prepare('SELECT transactions.amount FROM transactions WHERE transactions.date = #:mydate#;'); //prepare the query
$stmt->bindValue('mydate', '2013-05-25', PDO::PARAM_STR); //bind the date as a string
$stmt->execute(); //run it
$result = $stmt->fetch(); //get the results
As far as my understanding goes the statement that results from the above would look like this as binding a string results in it being surrounded by quotes:
SELECT transactions.amount FROM transactions WHERE transactions.date = #'2013-05-25'#;
This causes an error and prevents the statement from running.
What's the best way to bind a date string in PDO without causing this error? I'm currently resorting to sprintf-ing the string which I'm sure is bad practise.
Edit: if I pass the hash-surrounded date then I still get the error as below:
Fatal error: Uncaught exception 'PDOException' with message
'SQLSTATE[22018]: Invalid character value for cast specification:
-3030 [Microsoft][ODBC Microsoft Access Driver] Data type mismatch in criteria expression. (SQLExecute[-3030] at
ext\pdo_odbc\odbc_stmt.c:254)' in
C:\xampp\htdocs\ips\php\classes.php:49 Stack trace: #0
C:\xampp\htdocs\ips\php\classes.php(49): PDOStatement-execute() #1
C:\xampp\htdocs\ips\php\classes.php(52): database-execute() #2
C:\xampp\htdocs\ips\try2.php(12): database-resultset() #3 {main}
thrown in C:\xampp\htdocs\ips\php\classes.php on line 49
