pictcode / lib / Cake / Model / Datasource / Database / Sqlite.php @ 635eef61
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<?php
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/**
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* SQLite layer for DBO
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package Cake.Model.Datasource.Database
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* @since CakePHP(tm) v 0.9.0
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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App::uses('DboSource', 'Model/Datasource'); |
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App::uses('CakeText', 'Utility'); |
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/**
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* DBO implementation for the SQLite3 DBMS.
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*
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* A DboSource adapter for SQLite 3 using PDO
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*
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* @package Cake.Model.Datasource.Database
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*/
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class Sqlite extends DboSource { |
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/**
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* Datasource Description
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*
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* @var string
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*/
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public $description = "SQLite DBO Driver"; |
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|
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/**
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* Quote Start
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*
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* @var string
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*/
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public $startQuote = '"'; |
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|
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/**
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* Quote End
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*
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* @var string
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*/
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public $endQuote = '"'; |
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|
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/**
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* Base configuration settings for SQLite3 driver
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*
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* @var array
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*/
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protected $_baseConfig = array( |
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'persistent' => false, |
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'database' => null, |
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'flags' => array() |
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); |
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|
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/**
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* SQLite3 column definition
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*
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* @var array
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*/
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public $columns = array( |
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'primary_key' => array('name' => 'integer primary key autoincrement'), |
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'string' => array('name' => 'varchar', 'limit' => '255'), |
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'text' => array('name' => 'text'), |
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'integer' => array('name' => 'integer', 'limit' => null, 'formatter' => 'intval'), |
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'biginteger' => array('name' => 'bigint', 'limit' => 20), |
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'float' => array('name' => 'float', 'formatter' => 'floatval'), |
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'decimal' => array('name' => 'decimal', 'formatter' => 'floatval'), |
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'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'), |
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'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'), |
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'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'), |
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'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'), |
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'binary' => array('name' => 'blob'), |
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'boolean' => array('name' => 'boolean') |
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); |
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|
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/**
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* List of engine specific additional field parameters used on table creating
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*
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* @var array
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*/
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public $fieldParameters = array( |
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'collate' => array( |
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'value' => 'COLLATE', |
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'quote' => false, |
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'join' => ' ', |
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'column' => 'Collate', |
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'position' => 'afterDefault', |
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'options' => array( |
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'BINARY', 'NOCASE', 'RTRIM' |
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) |
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), |
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); |
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|
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/**
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* Connects to the database using config['database'] as a filename.
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*
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* @return bool
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* @throws MissingConnectionException
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*/
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public function connect() { |
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$config = $this->config; |
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$flags = $config['flags'] + array( |
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PDO::ATTR_PERSISTENT => $config['persistent'], |
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION |
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); |
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try {
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$this->_connection = new PDO('sqlite:' . $config['database'], null, null, $flags); |
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$this->connected = true; |
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} catch(PDOException $e) { |
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throw new MissingConnectionException(array( |
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'class' => get_class($this), |
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'message' => $e->getMessage() |
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)); |
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} |
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return $this->connected; |
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} |
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/**
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* Check whether the SQLite extension is installed/loaded
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*
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* @return bool
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*/
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public function enabled() { |
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return in_array('sqlite', PDO::getAvailableDrivers()); |
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} |
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/**
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* Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
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*
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* @param mixed $data Unused.
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* @return array Array of table names in the database
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*/
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public function listSources($data = null) { |
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$cache = parent::listSources(); |
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if ($cache) { |
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return $cache; |
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} |
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$result = $this->fetchAll("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;", false); |
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if (!$result || empty($result)) { |
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return array(); |
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} |
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$tables = array(); |
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foreach ($result as $table) { |
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$tables[] = $table[0]['name']; |
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} |
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parent::listSources($tables); |
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return $tables; |
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} |
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/**
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* Returns an array of the fields in given table name.
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*
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* @param Model|string $model Either the model or table name you want described.
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* @return array Fields in table. Keys are name and type
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*/
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public function describe($model) { |
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$table = $this->fullTableName($model, false, false); |
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$cache = parent::describe($table); |
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if ($cache) { |
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return $cache; |
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} |
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$fields = array(); |
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$result = $this->_execute( |
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'PRAGMA table_info(' . $this->value($table, 'string') . ')' |
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); |
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|
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foreach ($result as $column) { |
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$column = (array)$column; |
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$default = ($column['dflt_value'] === 'NULL') ? null : trim($column['dflt_value'], "'"); |
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$fields[$column['name']] = array( |
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'type' => $this->column($column['type']), |
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'null' => !$column['notnull'], |
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'default' => $default, |
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'length' => $this->length($column['type']) |
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); |
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if ($column['pk'] == 1) { |
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$fields[$column['name']]['key'] = $this->index['PRI']; |
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$fields[$column['name']]['null'] = false; |
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if (empty($fields[$column['name']]['length'])) { |
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$fields[$column['name']]['length'] = 11; |
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} |
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} |
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} |
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$result->closeCursor();
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$this->_cacheDescription($table, $fields); |
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return $fields; |
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} |
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/**
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* Generates and executes an SQL UPDATE statement for given model, fields, and values.
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*
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* @param Model $model The model instance to update.
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* @param array $fields The fields to update.
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* @param array $values The values to set columns to.
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* @param mixed $conditions array of conditions to use.
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* @return array
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*/
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public function update(Model $model, $fields = array(), $values = null, $conditions = null) { |
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if (empty($values) && !empty($fields)) { |
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foreach ($fields as $field => $value) { |
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if (strpos($field, $model->alias . '.') !== false) { |
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unset($fields[$field]); |
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$field = str_replace($model->alias . '.', "", $field); |
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$field = str_replace($model->alias . '.', "", $field); |
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$fields[$field] = $value; |
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} |
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} |
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} |
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return parent::update($model, $fields, $values, $conditions); |
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} |
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/**
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* Deletes all the records in a table and resets the count of the auto-incrementing
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* primary key, where applicable.
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*
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* @param string|Model $table A string or model class representing the table to be truncated
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* @return bool SQL TRUNCATE TABLE statement, false if not applicable.
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*/
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public function truncate($table) { |
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if (in_array('sqlite_sequence', $this->listSources())) { |
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$this->_execute('DELETE FROM sqlite_sequence where name=' . $this->startQuote . $this->fullTableName($table, false, false) . $this->endQuote); |
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} |
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return $this->execute('DELETE FROM ' . $this->fullTableName($table)); |
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} |
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/**
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* Converts database-layer column types to basic types
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*
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* @param string $real Real database-layer column type (i.e. "varchar(255)")
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* @return string Abstract column type (i.e. "string")
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*/
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public function column($real) { |
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if (is_array($real)) { |
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$col = $real['name']; |
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if (isset($real['limit'])) { |
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$col .= '(' . $real['limit'] . ')'; |
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} |
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return $col; |
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} |
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$col = strtolower(str_replace(')', '', $real)); |
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if (strpos($col, '(') !== false) { |
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list($col) = explode('(', $col); |
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} |
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$standard = array( |
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'text',
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'integer',
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'float',
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'boolean',
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'timestamp',
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'date',
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'datetime',
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'time'
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); |
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if (in_array($col, $standard)) { |
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return $col; |
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} |
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if ($col === 'bigint') { |
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return 'biginteger'; |
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} |
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if (strpos($col, 'char') !== false) { |
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return 'string'; |
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} |
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if (in_array($col, array('blob', 'clob'))) { |
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return 'binary'; |
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} |
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if (strpos($col, 'numeric') !== false || strpos($col, 'decimal') !== false) { |
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return 'decimal'; |
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} |
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return 'text'; |
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} |
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|
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/**
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* Generate ResultSet
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*
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* @param mixed $results The results to modify.
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* @return void
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*/
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public function resultSet($results) { |
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$this->results = $results; |
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$this->map = array(); |
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$numFields = $results->columnCount(); |
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$index = 0; |
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$j = 0; |
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// PDO::getColumnMeta is experimental and does not work with sqlite3,
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// so try to figure it out based on the querystring
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$querystring = $results->queryString; |
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if (stripos($querystring, 'SELECT') === 0 && stripos($querystring, 'FROM') > 0) { |
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$selectpart = substr($querystring, 7); |
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$selects = array(); |
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foreach (CakeText::tokenize($selectpart, ',', '(', ')') as $part) { |
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$fromPos = stripos($part, ' FROM '); |
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if ($fromPos !== false) { |
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$selects[] = trim(substr($part, 0, $fromPos)); |
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break;
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} |
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$selects[] = $part; |
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} |
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} elseif (strpos($querystring, 'PRAGMA table_info') === 0) { |
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$selects = array('cid', 'name', 'type', 'notnull', 'dflt_value', 'pk'); |
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} elseif (strpos($querystring, 'PRAGMA index_list') === 0) { |
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$selects = array('seq', 'name', 'unique'); |
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} elseif (strpos($querystring, 'PRAGMA index_info') === 0) { |
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$selects = array('seqno', 'cid', 'name'); |
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} |
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while ($j < $numFields) { |
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if (!isset($selects[$j])) { |
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$j++;
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continue;
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} |
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if (preg_match('/\bAS(?!.*\bAS\b)\s+(.*)/i', $selects[$j], $matches)) { |
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$columnName = trim($matches[1], '"'); |
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} else {
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$columnName = trim(str_replace('"', '', $selects[$j])); |
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} |
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if (strpos($selects[$j], 'DISTINCT') === 0) { |
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$columnName = str_ireplace('DISTINCT', '', $columnName); |
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} |
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$metaType = false; |
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try {
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$metaData = (array)$results->getColumnMeta($j); |
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if (!empty($metaData['sqlite:decl_type'])) { |
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$metaType = trim($metaData['sqlite:decl_type']); |
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} |
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} catch (Exception $e) { |
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} |
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|
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if (strpos($columnName, '.')) { |
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$parts = explode('.', $columnName); |
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$this->map[$index++] = array(trim($parts[0]), trim($parts[1]), $metaType); |
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} else {
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$this->map[$index++] = array(0, $columnName, $metaType); |
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} |
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$j++;
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} |
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} |
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|
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/**
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* Fetches the next row from the current result set
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*
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* @return mixed array with results fetched and mapped to column names or false if there is no results left to fetch
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*/
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public function fetchResult() { |
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if ($row = $this->_result->fetch(PDO::FETCH_NUM)) { |
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$resultRow = array(); |
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foreach ($this->map as $col => $meta) { |
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list($table, $column, $type) = $meta; |
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$resultRow[$table][$column] = $row[$col]; |
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if ($type === 'boolean' && $row[$col] !== null) { |
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$resultRow[$table][$column] = $this->boolean($resultRow[$table][$column]); |
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} |
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} |
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return $resultRow; |
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} |
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$this->_result->closeCursor();
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return false; |
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} |
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|
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/**
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* Returns a limit statement in the correct format for the particular database.
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*
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* @param int $limit Limit of results returned
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* @param int $offset Offset from which to start results
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* @return string SQL limit/offset statement
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*/
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public function limit($limit, $offset = null) { |
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if ($limit) { |
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$rt = sprintf(' LIMIT %u', $limit); |
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if ($offset) { |
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$rt .= sprintf(' OFFSET %u', $offset); |
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} |
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return $rt; |
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} |
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return null; |
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} |
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|
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/**
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* Generate a database-native column schema string
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*
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* @param array $column An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]),
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* where options can be 'default', 'length', or 'key'.
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* @return string
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*/
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public function buildColumn($column) { |
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$name = $type = null; |
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$column += array('null' => true); |
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extract($column); |
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|
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if (empty($name) || empty($type)) { |
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trigger_error(__d('cake_dev', 'Column name or type not defined in schema'), E_USER_WARNING); |
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return null; |
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} |
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|
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if (!isset($this->columns[$type])) { |
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trigger_error(__d('cake_dev', 'Column type %s does not exist', $type), E_USER_WARNING); |
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return null; |
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} |
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|
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$isPrimary = (isset($column['key']) && $column['key'] === 'primary'); |
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if ($isPrimary && $type === 'integer') { |
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return $this->name($name) . ' ' . $this->columns['primary_key']['name']; |
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} |
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$out = parent::buildColumn($column); |
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if ($isPrimary && $type === 'biginteger') { |
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$replacement = 'PRIMARY KEY'; |
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if ($column['null'] === false) { |
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$replacement = 'NOT NULL ' . $replacement; |
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} |
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return str_replace($this->columns['primary_key']['name'], $replacement, $out); |
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} |
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return $out; |
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} |
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|
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/**
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* Sets the database encoding
|
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*
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* @param string $enc Database encoding
|
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* @return bool
|
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*/
|
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public function setEncoding($enc) { |
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if (!in_array($enc, array("UTF-8", "UTF-16", "UTF-16le", "UTF-16be"))) { |
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return false; |
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} |
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return $this->_execute("PRAGMA encoding = \"{$enc}\"") !== false; |
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} |
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|
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/**
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* Gets the database encoding
|
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*
|
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* @return string The database encoding
|
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*/
|
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public function getEncoding() { |
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return $this->fetchRow('PRAGMA encoding'); |
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} |
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|
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/**
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* Removes redundant primary key indexes, as they are handled in the column def of the key.
|
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*
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* @param array $indexes The indexes to build.
|
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* @param string $table The table name.
|
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* @return string The completed index.
|
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*/
|
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public function buildIndex($indexes, $table = null) { |
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$join = array(); |
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|
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$table = str_replace('"', '', $table); |
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list($dbname, $table) = explode('.', $table); |
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$dbname = $this->name($dbname); |
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|
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foreach ($indexes as $name => $value) { |
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|
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if ($name === 'PRIMARY') { |
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continue;
|
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} |
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$out = 'CREATE '; |
| 473 |
|
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if (!empty($value['unique'])) { |
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$out .= 'UNIQUE '; |
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} |
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if (is_array($value['column'])) { |
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$value['column'] = implode(', ', array_map(array(&$this, 'name'), $value['column'])); |
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} else {
|
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$value['column'] = $this->name($value['column']); |
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} |
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$t = trim($table, '"'); |
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$indexname = $this->name($t . '_' . $name); |
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$table = $this->name($table); |
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$out .= "INDEX {$dbname}.{$indexname} ON {$table}({$value['column']});"; |
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$join[] = $out; |
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} |
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return $join; |
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} |
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|
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/**
|
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* Overrides DboSource::index to handle SQLite index introspection
|
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* Returns an array of the indexes in given table name.
|
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*
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* @param string $model Name of model to inspect
|
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* @return array Fields in table. Keys are column and unique
|
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*/
|
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public function index($model) { |
| 499 |
$index = array(); |
| 500 |
$table = $this->fullTableName($model, false, false); |
| 501 |
if ($table) { |
| 502 |
$indexes = $this->query('PRAGMA index_list(' . $table . ')'); |
| 503 |
|
| 504 |
if (is_bool($indexes)) { |
| 505 |
return array(); |
| 506 |
} |
| 507 |
foreach ($indexes as $info) { |
| 508 |
$key = array_pop($info); |
| 509 |
$keyInfo = $this->query('PRAGMA index_info("' . $key['name'] . '")'); |
| 510 |
foreach ($keyInfo as $keyCol) { |
| 511 |
if (!isset($index[$key['name']])) { |
| 512 |
$col = array(); |
| 513 |
if (preg_match('/autoindex/', $key['name'])) { |
| 514 |
$key['name'] = 'PRIMARY'; |
| 515 |
} |
| 516 |
$index[$key['name']]['column'] = $keyCol[0]['name']; |
| 517 |
$index[$key['name']]['unique'] = (int)$key['unique'] === 1; |
| 518 |
} else {
|
| 519 |
if (!is_array($index[$key['name']]['column'])) { |
| 520 |
$col[] = $index[$key['name']]['column']; |
| 521 |
} |
| 522 |
$col[] = $keyCol[0]['name']; |
| 523 |
$index[$key['name']]['column'] = $col; |
| 524 |
} |
| 525 |
} |
| 526 |
} |
| 527 |
} |
| 528 |
return $index; |
| 529 |
} |
| 530 |
|
| 531 |
/**
|
| 532 |
* Overrides DboSource::renderStatement to handle schema generation with SQLite-style indexes
|
| 533 |
*
|
| 534 |
* @param string $type The type of statement being rendered.
|
| 535 |
* @param array $data The data to convert to SQL.
|
| 536 |
* @return string
|
| 537 |
*/
|
| 538 |
public function renderStatement($type, $data) { |
| 539 |
switch (strtolower($type)) { |
| 540 |
case 'schema': |
| 541 |
extract($data); |
| 542 |
if (is_array($columns)) { |
| 543 |
$columns = "\t" . implode(",\n\t", array_filter($columns)); |
| 544 |
} |
| 545 |
if (is_array($indexes)) { |
| 546 |
$indexes = "\t" . implode("\n\t", array_filter($indexes)); |
| 547 |
} |
| 548 |
return "CREATE TABLE {$table} (\n{$columns});\n{$indexes}"; |
| 549 |
default:
|
| 550 |
return parent::renderStatement($type, $data); |
| 551 |
} |
| 552 |
} |
| 553 |
|
| 554 |
/**
|
| 555 |
* PDO deals in objects, not resources, so overload accordingly.
|
| 556 |
*
|
| 557 |
* @return bool
|
| 558 |
*/
|
| 559 |
public function hasResult() { |
| 560 |
return is_object($this->_result); |
| 561 |
} |
| 562 |
|
| 563 |
/**
|
| 564 |
* Generate a "drop table" statement for the given table
|
| 565 |
*
|
| 566 |
* @param type $table Name of the table to drop
|
| 567 |
* @return string Drop table SQL statement
|
| 568 |
*/
|
| 569 |
protected function _dropTable($table) { |
| 570 |
return 'DROP TABLE IF EXISTS ' . $this->fullTableName($table) . ";"; |
| 571 |
} |
| 572 |
|
| 573 |
/**
|
| 574 |
* Gets the schema name
|
| 575 |
*
|
| 576 |
* @return string The schema name
|
| 577 |
*/
|
| 578 |
public function getSchemaName() { |
| 579 |
return "main"; // Sqlite Datasource does not support multidb |
| 580 |
} |
| 581 |
|
| 582 |
/**
|
| 583 |
* Check if the server support nested transactions
|
| 584 |
*
|
| 585 |
* @return bool
|
| 586 |
*/
|
| 587 |
public function nestedTransactionSupported() { |
| 588 |
return $this->useNestedTransactions && version_compare($this->getVersion(), '3.6.8', '>='); |
| 589 |
} |
| 590 |
|
| 591 |
} |