tonyair/silverstripe-framework
1
0
Fork 0
mirror of https://github.com/silverstripe/silverstripe-framework synced 2024-10-22 14:05:37 +02:00
Code Issues Projects Releases Wiki Activity

BUG Remove caching of statements due to risk of instability

Browse Source 
This would cause segfaults in rare situations where statements are reused
This commit is contained in:
Damian Mooyman 2014-07-25 14:14:59 +12:00
parent 76eb3dbfa6
commit 81c0a3499b
1 changed files with 25 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
model/connect/MySQLiConnector.php
View File

@ -38,47 +38,20 @@ class MySQLiConnector extends DBConnector {
}
/**
* List of prepared statements, cached by SQL string
*
* @var array
*/
protected $cachedStatements = array();
/**
* Flush all prepared statements
*/
public function flushStatements() {
$this->cachedStatements = array();
}
/**
* Retrieve a prepared statement for a given SQL string, or return an already prepared version if
* one exists for the given query
* Retrieve a prepared statement for a given SQL string
*
* @param string $sql
* @param boolean &$success
* @return mysqli_stmt
*/
public function getOrPrepareStatement($sql, &$success) {
// Check for cached statement
if(!empty($this->cachedStatements[$sql])) {
$success = true;
return $this->cachedStatements[$sql];
}
public function prepareStatement($sql, &$success) {
// Prepare statement with arguments
$statement = $this->dbConn->stmt_init();
if($success = $statement->prepare($sql)) {
// Only cache prepared statement on success
$this->cachedStatements[$sql] = $statement;
}
$success = $statement->prepare($sql);
return $statement;
}
public function connect($parameters, $selectDB = false) {
$this->flushStatements();
// Normally $selectDB is set to false by the MySQLDatabase controller, as per convention
$selectedDB = ($selectDB && !empty($parameters['database'])) ? $parameters['database'] : null;
@ -248,7 +221,7 @@ class MySQLiConnector extends DBConnector {
$self = $this;
$lastStatement = $this->benchmarkQuery($sql, function($sql) use($parsedParameters, $blobs, $self) {
$statement = $self->getOrPrepareStatement($sql, $success);
$statement = $self->prepareStatement($sql, $success);
if(!$success) return $statement;
$self->bindParameters($statement, $parsedParameters);