mirror of
https://github.com/dg/dibi.git
synced 2025-02-24 19:02:36 +01:00
3e04378375
- removed option 'resultObjects' - SQlite driver removes quotes from result-set column names - this revision may cause compatibility break
448 lines
9.0 KiB
PHP
448 lines
9.0 KiB
PHP
<?php
|
|
|
|
/**
|
|
* dibi - tiny'n'smart database abstraction layer
|
|
* ----------------------------------------------
|
|
*
|
|
* Copyright (c) 2005, 2008 David Grudl (http://davidgrudl.com)
|
|
*
|
|
* This source file is subject to the "dibi license" that is bundled
|
|
* with this package in the file license.txt.
|
|
*
|
|
* For more information please see http://dibiphp.com
|
|
*
|
|
* @copyright Copyright (c) 2005, 2008 David Grudl
|
|
* @license http://dibiphp.com/license dibi license
|
|
* @link http://dibiphp.com
|
|
* @package dibi
|
|
* @version $Id$
|
|
*/
|
|
|
|
|
|
/**
|
|
* The dibi driver interacting with databases via ODBC connections.
|
|
*
|
|
* Connection options:
|
|
* - 'dsn' - driver specific DSN
|
|
* - 'username' (or 'user')
|
|
* - 'password' (or 'pass')
|
|
* - 'persistent' - try to find a persistent link?
|
|
* - 'lazy' - if TRUE, connection will be established only when required
|
|
*
|
|
* @author David Grudl
|
|
* @copyright Copyright (c) 2005, 2008 David Grudl
|
|
* @package dibi
|
|
*/
|
|
class DibiOdbcDriver extends DibiObject implements IDibiDriver
|
|
{
|
|
|
|
/**
|
|
* Connection resource.
|
|
* @var resource
|
|
*/
|
|
private $connection;
|
|
|
|
|
|
/**
|
|
* Resultset resource.
|
|
* @var resource
|
|
*/
|
|
private $resultSet;
|
|
|
|
|
|
/**
|
|
* Cursor.
|
|
* @var int
|
|
*/
|
|
private $row = 0;
|
|
|
|
|
|
|
|
/**
|
|
* @throws DibiException
|
|
*/
|
|
public function __construct()
|
|
{
|
|
if (!extension_loaded('odbc')) {
|
|
throw new DibiDriverException("PHP extension 'odbc' is not loaded.");
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Connects to a database.
|
|
*
|
|
* @return void
|
|
* @throws DibiException
|
|
*/
|
|
public function connect(array &$config)
|
|
{
|
|
DibiConnection::alias($config, 'username', 'user');
|
|
DibiConnection::alias($config, 'password', 'pass');
|
|
|
|
// default values
|
|
if (!isset($config['username'])) $config['username'] = ini_get('odbc.default_user');
|
|
if (!isset($config['password'])) $config['password'] = ini_get('odbc.default_pw');
|
|
if (!isset($config['dsn'])) $config['dsn'] = ini_get('odbc.default_db');
|
|
|
|
if (empty($config['persistent'])) {
|
|
$this->connection = @odbc_connect($config['dsn'], $config['username'], $config['password']); // intentionally @
|
|
} else {
|
|
$this->connection = @odbc_pconnect($config['dsn'], $config['username'], $config['password']); // intentionally @
|
|
}
|
|
|
|
if (!is_resource($this->connection)) {
|
|
throw new DibiDriverException(odbc_errormsg() . ' ' . odbc_error());
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Disconnects from a database.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function disconnect()
|
|
{
|
|
odbc_close($this->connection);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Executes the SQL query.
|
|
*
|
|
* @param string SQL statement.
|
|
* @return IDibiDriver|NULL
|
|
* @throws DibiDriverException
|
|
*/
|
|
public function query($sql)
|
|
{
|
|
$this->resultSet = @odbc_exec($this->connection, $sql); // intentionally @
|
|
|
|
if ($this->resultSet === FALSE) {
|
|
throw new DibiDriverException(odbc_errormsg($this->connection) . ' ' . odbc_error($this->connection), 0, $sql);
|
|
}
|
|
|
|
return is_resource($this->resultSet) ? clone $this : NULL;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Gets the number of affected rows by the last INSERT, UPDATE or DELETE query.
|
|
*
|
|
* @return int|FALSE number of rows or FALSE on error
|
|
*/
|
|
public function affectedRows()
|
|
{
|
|
return odbc_num_rows($this->resultSet);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Retrieves the ID generated for an AUTO_INCREMENT column by the previous INSERT query.
|
|
*
|
|
* @return int|FALSE int on success or FALSE on failure
|
|
*/
|
|
public function insertId($sequence)
|
|
{
|
|
throw new NotSupportedException('ODBC does not support autoincrementing.');
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Begins a transaction (if supported).
|
|
* @return void
|
|
* @throws DibiDriverException
|
|
*/
|
|
public function begin()
|
|
{
|
|
if (!odbc_autocommit($this->connection, FALSE)) {
|
|
throw new DibiDriverException(odbc_errormsg($this->connection) . ' ' . odbc_error($this->connection));
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Commits statements in a transaction.
|
|
* @return void
|
|
* @throws DibiDriverException
|
|
*/
|
|
public function commit()
|
|
{
|
|
if (!odbc_commit($this->connection)) {
|
|
throw new DibiDriverException(odbc_errormsg($this->connection) . ' ' . odbc_error($this->connection));
|
|
}
|
|
odbc_autocommit($this->connection, TRUE);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Rollback changes in a transaction.
|
|
* @return void
|
|
* @throws DibiDriverException
|
|
*/
|
|
public function rollback()
|
|
{
|
|
if (!odbc_rollback($this->connection)) {
|
|
throw new DibiDriverException(odbc_errormsg($this->connection) . ' ' . odbc_error($this->connection));
|
|
}
|
|
odbc_autocommit($this->connection, TRUE);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Returns the connection resource.
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public function getResource()
|
|
{
|
|
return $this->connection;
|
|
}
|
|
|
|
|
|
|
|
/********************* SQL ****************d*g**/
|
|
|
|
|
|
|
|
/**
|
|
* Encodes data for use in an SQL statement.
|
|
*
|
|
* @param string value
|
|
* @param string type (dibi::FIELD_TEXT, dibi::FIELD_BOOL, ...)
|
|
* @return string encoded value
|
|
* @throws InvalidArgumentException
|
|
*/
|
|
public function escape($value, $type)
|
|
{
|
|
switch ($type) {
|
|
case dibi::FIELD_TEXT:
|
|
case dibi::FIELD_BINARY:
|
|
return "'" . str_replace("'", "''", $value) . "'";
|
|
|
|
case dibi::IDENTIFIER:
|
|
$value = str_replace(array('[', ']'), array('[[', ']]'), $value);
|
|
return '[' . str_replace('.', '].[', $value) . ']';
|
|
|
|
case dibi::FIELD_BOOL:
|
|
return $value ? -1 : 0;
|
|
|
|
case dibi::FIELD_DATE:
|
|
return date("#m/d/Y#", $value);
|
|
|
|
case dibi::FIELD_DATETIME:
|
|
return date("#m/d/Y H:i:s#", $value);
|
|
|
|
default:
|
|
throw new InvalidArgumentException('Unsupported type.');
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Decodes data from result set.
|
|
*
|
|
* @param string value
|
|
* @param string type (dibi::FIELD_BINARY)
|
|
* @return string decoded value
|
|
* @throws InvalidArgumentException
|
|
*/
|
|
public function unescape($value, $type)
|
|
{
|
|
throw new InvalidArgumentException('Unsupported type.');
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Injects LIMIT/OFFSET to the SQL query.
|
|
*
|
|
* @param string &$sql The SQL query that will be modified.
|
|
* @param int $limit
|
|
* @param int $offset
|
|
* @return void
|
|
*/
|
|
public function applyLimit(&$sql, $limit, $offset)
|
|
{
|
|
// offset suppot is missing...
|
|
if ($limit >= 0) {
|
|
$sql = 'SELECT TOP ' . (int) $limit . ' * FROM (' . $sql . ')';
|
|
}
|
|
|
|
if ($offset) throw new InvalidArgumentException('Offset is not implemented in driver odbc.');
|
|
}
|
|
|
|
|
|
|
|
/********************* result set ****************d*g**/
|
|
|
|
|
|
|
|
/**
|
|
* Returns the number of rows in a result set.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function rowCount()
|
|
{
|
|
// will return -1 with many drivers :-(
|
|
return odbc_num_rows($this->resultSet);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Fetches the row at current position and moves the internal cursor to the next position.
|
|
* internal usage only
|
|
*
|
|
* @param bool TRUE for associative array, FALSE for numeric
|
|
* @return array array on success, nonarray if no next record
|
|
*/
|
|
public function fetch($assoc)
|
|
{
|
|
if ($assoc) {
|
|
return odbc_fetch_array($this->resultSet, ++$this->row);
|
|
} else {
|
|
$set = $this->resultSet;
|
|
if (!odbc_fetch_row($set, ++$this->row)) return FALSE;
|
|
$count = odbc_num_fields($set);
|
|
$cols = array();
|
|
for ($i = 1; $i <= $count; $i++) $cols[] = odbc_result($set, $i);
|
|
return $cols;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Moves cursor position without fetching row.
|
|
*
|
|
* @param int the 0-based cursor pos to seek to
|
|
* @return boolean TRUE on success, FALSE if unable to seek to specified record
|
|
* @throws DibiException
|
|
*/
|
|
public function seek($row)
|
|
{
|
|
$this->row = $row;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Frees the resources allocated for this result set.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function free()
|
|
{
|
|
odbc_free_result($this->resultSet);
|
|
$this->resultSet = NULL;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Returns metadata for all columns in a result set.
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getColumnsMeta()
|
|
{
|
|
$count = odbc_num_fields($this->resultSet);
|
|
$meta = array();
|
|
for ($i = 1; $i <= $count; $i++) {
|
|
// items 'name' and 'table' are required
|
|
$meta[] = array(
|
|
'name' => odbc_field_name($this->resultSet, $i),
|
|
'table' => NULL,
|
|
'nativetype'=> odbc_field_type($this->resultSet, $i),
|
|
'length' => odbc_field_len($this->resultSet, $i),
|
|
'scale' => odbc_field_scale($this->resultSet, $i),
|
|
'precision' => odbc_field_precision($this->resultSet, $i),
|
|
);
|
|
}
|
|
return $meta;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Returns the result set resource.
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public function getResultResource()
|
|
{
|
|
return $this->resultSet;
|
|
}
|
|
|
|
|
|
|
|
/********************* reflection ****************d*g**/
|
|
|
|
|
|
|
|
/**
|
|
* Returns list of tables.
|
|
* @return array
|
|
*/
|
|
public function getTables()
|
|
{
|
|
$result = odbc_tables($this->connection);
|
|
$res = array();
|
|
while (odbc_fetch_row($result)) {
|
|
$res[] = array('name' => odbc_result($result, 'TABLE_NAME'));
|
|
}
|
|
return $res;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Returns metadata for all columns in a table.
|
|
* @param string
|
|
* @return array
|
|
*/
|
|
public function getColumns($table)
|
|
{
|
|
throw new NotImplementedException;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Returns metadata for all indexes in a table.
|
|
* @param string
|
|
* @return array
|
|
*/
|
|
public function getIndexes($table)
|
|
{
|
|
throw new NotImplementedException;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Returns metadata for all foreign keys in a table.
|
|
* @param string
|
|
* @return array
|
|
*/
|
|
public function getForeignKeys($table)
|
|
{
|
|
throw new NotImplementedException;
|
|
}
|
|
|
|
}
|