/**
* Prepare SQL query.
* Use replica connection for SELECT queries. Use master server for others.
* @see RM_Db_Connection::prepare for details
*/
public function prepare($sql, $driver_options = array())
{
$sql = trim($sql);
if ($this->_log) {
$sql_log = substr(str_replace("\n", " ", $sql), 0, 60);
}
if (stristr($sql, 'select') === $sql) {
if ($this->getReplicaConnection()) {
if ($this->_log) {
M('Log')->record('replica', 'slave-' . $this->getReplicaConnection()->getConnectionName(), $sql_log);
}
return $this->getReplicaConnection()->prepare($sql);
}
} else {
if (stristr($sql, 'set') !== $sql) {
$this->useReplica(FALSE);
}
}
if ($this->_log) {
M('Log')->record('replica', 'master-' . $this->getConnectionName(), $sql_log);
}
return parent::prepare($sql);
}
