Query/docs/files/drivers/firebird/firebird_driver.php.txt

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2014-04-15 16:13:18 -04:00
<?php
/**
* Query
*
* Free Query Builder / Database Abstraction Layer
*
* @package Query
* @author Timothy J. Warren
* @copyright Copyright (c) 2012 - 2014
* @link https://github.com/aviat4ion/Query
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
namespace Query\Driver;
use Query\Table\Table_Builder;
// --------------------------------------------------------------------------
/**
* Firebird Database class
*
* PDO-firebird isn't stable, so this is a wrapper of the fbird_ public functions.
*
* @package Query
* @subpackage Drivers
*/
class Firebird extends Abstract_Driver {
/**
* Reference to the last query executed
*
* @var object
*/
protected $statement = NULL;
/**
* Reference to the resource returned by
* the last query executed
*
* @var resource
*/
protected $statement_link = NULL;
/**
* Reference to the current transaction
*
* @var resource
*/
protected $trans = NULL;
/**
* Reference to the connection resource
*
* @var resource
*/
protected $conn = NULL;
/**
* Reference to the service resource
*
* @var resource
*/
protected $service = NULL;
/**
* Open the link to the database
*
* @param string $dbpath
* @param string $user
* @param string $pass
* @param array $options
*/
public function __construct($dbpath, $user='SYSDBA', $pass='masterkey', array $options = array())
{
$connect_function = (isset($options[\PDO::ATTR_PERSISTENT]) && $options[\PDO::ATTR_PERSISTENT] == TRUE)
? '\\fbird_pconnect'
: '\\fbird_connect';
$this->conn = $connect_function($dbpath, $user, $pass, 'utf-8', 0);
$this->service = \fbird_service_attach('localhost', $user, $pass);
// Throw an exception to make this match other pdo classes
if ( ! \is_resource($this->conn)) throw new \PDOException(\fbird_errmsg(), \fbird_errcode(), NULL);
// Load these classes here because this
// driver does not call the constructor
// of DB_PDO, which defines these
// class variables for the other drivers
// Load the sql class
$class = __CLASS__."_sql";
$this->sql = new $class();
// Load the util class
$class = __CLASS__."_util";
$this->util = new $class($this);
// Load the table builder class
$this->table = new Table_Builder('', array(), $this);
}
// --------------------------------------------------------------------------
/**
* Cleanup some loose ends
* @codeCoverageIgnore
*/
public function __destruct()
{
\fbird_service_detach($this->service);
}
// --------------------------------------------------------------------------
/**
* Return service handle
*
* @return resource
*/
public function get_service()
{
return $this->service;
}
// --------------------------------------------------------------------------
/**
* Empty a database table
*
* @param string $table
*/
public function truncate($table)
{
// Firebird lacks a truncate command
$sql = 'DELETE FROM '.$this->quote_table($table);
$this->statement = $this->query($sql);
}
// --------------------------------------------------------------------------
/**
* Execute an sql statement and return number of affected rows
*
* @param string $sql
* @return int
*/
public function exec($sql)
{
return NULL;
}
// --------------------------------------------------------------------------
/**
* Implement for compatibility with PDO
*
* @param int $attribute
* @return mixed
*/
public function getAttribute($attribute)
{
return NULL;
}
// --------------------------------------------------------------------------
/**
* Return whether the current statement is in a transaction
*
* @return bool
*/
public function inTransaction()
{
return ! is_null($this->trans);
}
// --------------------------------------------------------------------------
/**
* Returns the last value of the specified generator
*
* @param string $name
* @return mixed
*/
public function lastInsertId($name = NULL)
{
return \fbird_gen_id($name, 0, $this->conn);
}
// --------------------------------------------------------------------------
/**
* Wrapper public function to better match PDO
*
* @param string $sql
* @return Firebird_Result
* @throws PDOException
*/
public function query($sql = '')
{
if (empty($sql)) throw new \PDOException("Query method requires an sql query!", 0, NULL);
$this->statement_link = (isset($this->trans))
? \fbird_query($this->trans, $sql)
: \fbird_query($this->conn, $sql);
// Throw the error as a exception
$err_string = \fbird_errmsg() . "Last query:" . $this->last_query;
if ($this->statement_link === FALSE) throw new \PDOException($err_string, \fbird_errcode(), NULL);
$this->statement = new FireBird_Result($this->statement_link, $this);
return $this->statement;
}
// --------------------------------------------------------------------------
/**
* Emulate PDO prepare
*
* @param string $query
* @param array $options
* @return Firebird_Result
* @throws PDOException
*/
public function prepare($query, $options=array())
{
$this->statement_link = \fbird_prepare($this->conn, $query);
// Throw the error as an exception
if ($this->statement_link === FALSE) throw new \PDOException(\fbird_errmsg(), \fbird_errcode(), NULL);
$this->statement = new FireBird_Result($this->statement_link, $this);
return $this->statement;
}
// --------------------------------------------------------------------------
/**
* Start a database transaction
*
* @return boolean|null
*/
public function beginTransaction()
{
return (($this->trans = \fbird_trans($this->conn)) !== NULL) ? TRUE : NULL;
}
// --------------------------------------------------------------------------
/**
* Commit a database transaction
*
* @return bool
*/
public function commit()
{
$res = \fbird_commit($this->trans);
$this->trans = NULL;
return $res;
}
// --------------------------------------------------------------------------
/**
* Rollback a transaction
*
* @return bool
*/
public function rollBack()
{
$res = \fbird_rollback($this->trans);
$this->trans = NULL;
return $res;
}
// --------------------------------------------------------------------------
/**
* Set a connection attribute
* @param int $attribute
* @param mixed $value
* @return bool
*/
public function setAttribute($attribute, $value)
{
return FALSE;
}
// --------------------------------------------------------------------------
/**
* Prepare and execute a query
*
* @param string $sql
* @param array $args
* @return Firebird_Result
*/
public function prepare_execute($sql, $args)
{
$query = $this->prepare($sql);
// Set the statement in the class variable for easy later access
$this->statement_link =& $query;
return $query->execute($args);
}
// --------------------------------------------------------------------------
/**
* Method to emulate PDO->quote
*
* @param string $str
* @param int $param_type
* @return string
*/
public function quote($str, $param_type = \PDO::PARAM_STR)
{
if(is_numeric($str))
{
return $str;
}
return "'".str_replace("'", "''", $str)."'";
}
// --------------------------------------------------------------------------
/**
* Method to emulate PDO->errorInfo / PDOStatement->errorInfo
*
* @return array
*/
public function errorInfo()
{
$code = \fbird_errcode();
$msg = \fbird_errmsg();
return array(0, $code, $msg);
}
// --------------------------------------------------------------------------
/**
* Method to emulate PDO->errorCode
*
* @return array
*/
public function errorCode()
{
return fbird_errcode();
}
// --------------------------------------------------------------------------
/**
* Bind a prepared query with arguments for executing
*
* @param string $sql
* @param array $params
* @return NULL
*/
public function prepare_query($sql, $params)
{
// You can't bind query statements before execution with
// the firebird database
return NULL;
}
// --------------------------------------------------------------------------
/**
* Create sql for batch insert
*
* @param string $table
* @param array $data
* @return array
*/
public function insert_batch($table, $data=array())
{
// Each member of the data array needs to be an array
if ( ! is_array(current($data))) return NULL;
// Start the block of sql statements
$sql = "EXECUTE BLOCK AS BEGIN\n";
$table = $this->quote_table($table);
$fields = \array_keys(\current($data));
$insert_template = "INSERT INTO {$table} ("
. implode(',', $this->quote_ident($fields))
. ") VALUES (";
foreach($data as $item)
{
// Quote string values
$vals = array_map(array($this, 'quote'), $item);
// Add the values in the sql
$sql .= $insert_template . implode(', ', $vals) . ");\n";
}
// End the block of SQL statements
$sql .= "END";
// Ruturn a null array value so the query is run as it is,
// not as a prepared statement, because a prepared statement
// doesn't work for this type of query in Firebird.
return array($sql, NULL);
}
}
// End of firebird_driver.php