mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
synced 2024-11-15 19:38:26 +00:00
621 lines
15 KiB
PHP
621 lines
15 KiB
PHP
<?php
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/**
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* SQLite layer for DBO
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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* @since CakePHP(tm) v 0.9.0
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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/**
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* DBO implementation for the SQLite DBMS.
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*
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* Long description for class
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*
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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*/
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class DboSqlite extends DboSource {
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/**
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* Enter description here...
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*
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* @var unknown_type
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*/
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public $description = "SQLite DBO Driver";
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/**
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* Opening quote for quoted identifiers
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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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* Closing quote for quoted identifiers
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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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* Keeps the transaction statistics of CREATE/UPDATE/DELETE queries
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*
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* @var array
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* @access protected
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*/
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protected $_queryStats = array();
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/**
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* Base configuration settings for SQLite 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' => true,
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'database' => null
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);
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/**
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* Index of basic SQL commands
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*
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* @var array
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* @access protected
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*/
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protected $_commands = array(
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'begin' => 'BEGIN TRANSACTION',
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'commit' => 'COMMIT TRANSACTION',
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'rollback' => 'ROLLBACK TRANSACTION'
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);
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/**
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* SQLite 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'),
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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' => 11, 'formatter' => 'intval'),
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'float' => array('name' => 'float', '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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* 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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* @access public
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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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* Connects to the database using config['database'] as a filename.
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*
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* @param array $config Configuration array for connecting
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* @return mixed
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*/
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function connect() {
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$config = $this->config;
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if (!$config['persistent']) {
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$this->connection = sqlite_open($config['database']);
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} else {
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$this->connection = sqlite_popen($config['database']);
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}
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$this->connected = is_resource($this->connection);
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if ($this->connected) {
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$this->_execute('PRAGMA count_changes = 1;');
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}
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return $this->connected;
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}
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/**
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* Check that SQLite is enabled/installed
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*
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* @return boolean
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*/
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function enabled() {
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return extension_loaded('sqlite');
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}
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/**
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* Disconnects from database.
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*
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* @return boolean True if the database could be disconnected, else false
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*/
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function disconnect() {
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@sqlite_close($this->connection);
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$this->connected = false;
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return $this->connected;
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}
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/**
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* Executes given SQL statement.
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*
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* @param string $sql SQL statement
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* @return resource Result resource identifier
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*/
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function _execute($sql) {
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$result = sqlite_query($this->connection, $sql);
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if (preg_match('/^(INSERT|UPDATE|DELETE)/', $sql)) {
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$this->resultSet($result);
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list($this->_queryStats) = $this->fetchResult();
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}
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return $result;
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}
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/**
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* Overrides DboSource::execute() to correctly handle query statistics
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*
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* @param string $sql
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* @return unknown
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*/
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function execute($sql) {
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$result = parent::execute($sql);
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$this->_queryStats = array();
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return $result;
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}
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/**
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* Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
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*
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* @return array Array of tablenames in the database
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*/
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function listSources() {
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$cache = parent::listSources();
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if ($cache != null) {
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return $cache;
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}
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$result = $this->fetchAll("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;", false);
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if (empty($result)) {
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return array();
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} else {
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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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return array();
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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 string $tableName Name of database table to inspect
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* @return array Fields in table. Keys are name and type
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*/
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function describe(&$model) {
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$cache = parent::describe($model);
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if ($cache != null) {
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return $cache;
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}
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$fields = array();
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$result = $this->fetchAll('PRAGMA table_info(' . $this->fullTableName($model) . ')');
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foreach ($result as $column) {
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$fields[$column[0]['name']] = array(
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'type' => $this->column($column[0]['type']),
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'null' => !$column[0]['notnull'],
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'default' => $column[0]['dflt_value'],
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'length' => $this->length($column[0]['type'])
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);
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if ($column[0]['pk'] == 1) {
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$colLength = $this->length($column[0]['type']);
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$fields[$column[0]['name']] = array(
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'type' => $fields[$column[0]['name']]['type'],
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'null' => false,
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'default' => $column[0]['dflt_value'],
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'key' => $this->index['PRI'],
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'length'=> ($colLength != null) ? $colLength : 11
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);
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}
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}
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$this->__cacheDescription($model->tablePrefix . $model->table, $fields);
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return $fields;
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}
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/**
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* Returns a quoted and escaped string of $data for use in an SQL statement.
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*
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* @param string $data String to be prepared for use in an SQL statement
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* @return string Quoted and escaped
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*/
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function value($data, $column = null, $safe = false) {
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$parent = parent::value($data, $column, $safe);
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if ($parent != null) {
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return $parent;
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}
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if ($data === null) {
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return 'NULL';
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}
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if ($data === '' && $column !== 'integer' && $column !== 'float' && $column !== 'boolean') {
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return "''";
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}
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switch ($column) {
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case 'boolean':
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$data = $this->boolean((bool)$data);
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break;
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case 'integer':
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case 'float':
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if ($data === '') {
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return 'NULL';
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}
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default:
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$data = sqlite_escape_string($data);
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break;
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}
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return "'" . $data . "'";
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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
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* @param array $fields
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* @param array $values
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* @param mixed $conditions
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* @return array
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*/
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function update(&$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] = $value;
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}
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}
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}
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$result = parent::update($model, $fields, $values, $conditions);
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return $result;
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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 mixed $table A string or model class representing the table to be truncated
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* @return boolean SQL TRUNCATE TABLE statement, false if not applicable.
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*/
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public function truncate($table) {
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return $this->execute('DELETE From ' . $this->fullTableName($table));
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}
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/**
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* Returns a formatted error message from previous database operation.
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*
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* @return string Error message
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*/
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function lastError() {
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$error = sqlite_last_error($this->connection);
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if ($error) {
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return $error.': '.sqlite_error_string($error);
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}
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return null;
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}
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/**
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* Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
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*
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* @return integer Number of affected rows
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*/
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function lastAffected() {
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if (!empty($this->_queryStats)) {
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foreach (array('rows inserted', 'rows updated', 'rows deleted') as $key) {
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if (array_key_exists($key, $this->_queryStats)) {
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return $this->_queryStats[$key];
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}
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}
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}
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return false;
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}
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/**
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* Returns number of rows in previous resultset. If no previous resultset exists,
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* this returns false.
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*
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* @return integer Number of rows in resultset
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*/
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function lastNumRows() {
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if ($this->hasResult()) {
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sqlite_num_rows($this->_result);
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}
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return false;
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}
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/**
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* Returns the ID generated from the previous INSERT operation.
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*
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* @return int
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*/
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function lastInsertId() {
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return sqlite_last_insert_rowid($this->connection);
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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 $real Real database-layer column type (i.e. "varchar(255)")
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* @return string Abstract column type (i.e. "string")
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*/
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function column($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(')', '', $real));
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$limit = null;
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if (strpos($col, '(') !== false) {
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list($col, $limit) = explode('(', $col);
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}
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if (in_array($col, array('text', 'integer', 'float', 'boolean', 'timestamp', 'date', 'datetime', 'time'))) {
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return $col;
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}
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if (strpos($col, 'varchar') !== 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) {
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return 'float';
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}
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return 'text';
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}
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/**
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* Enter description here...
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*
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* @param unknown_type $results
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*/
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function resultSet(&$results) {
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$this->results =& $results;
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$this->map = array();
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$fieldCount = sqlite_num_fields($results);
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$index = $j = 0;
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while ($j < $fieldCount) {
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$columnName = str_replace('"', '', sqlite_field_name($results, $j));
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if (strpos($columnName, '.')) {
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$parts = explode('.', $columnName);
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$this->map[$index++] = array($parts[0], $parts[1]);
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} else {
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$this->map[$index++] = array(0, $columnName);
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}
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$j++;
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}
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}
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/**
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* Fetches the next row from the current result set
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*
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* @return unknown
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*/
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function fetchResult() {
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if ($row = sqlite_fetch_array($this->results, SQLITE_ASSOC)) {
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$resultRow = array();
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$i = 0;
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foreach ($row as $index => $field) {
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if (strpos($index, '.')) {
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list($table, $column) = explode('.', str_replace('"', '', $index));
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$resultRow[$table][$column] = $row[$index];
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} else {
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$resultRow[0][str_replace('"', '', $index)] = $row[$index];
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}
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$i++;
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}
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return $resultRow;
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} else {
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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 integer $limit Limit of results returned
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* @param integer $offset Offset from which to start results
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* @return string SQL limit/offset statement
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*/
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function limit($limit, $offset = null) {
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if ($limit) {
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$rt = '';
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if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
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$rt = ' LIMIT';
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}
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$rt .= ' ' . $limit;
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if ($offset) {
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$rt .= ' OFFSET ' . $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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* Generate a database-native column schema string
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*
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* @param array $column An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]),
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* where options can be 'default', 'length', or 'key'.
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* @return string
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*/
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function buildColumn($column) {
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$name = $type = null;
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$column = array_merge(array('null' => true), $column);
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extract($column);
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if (empty($name) || empty($type)) {
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trigger_error(__('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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if (!isset($this->columns[$type])) {
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trigger_error(sprintf(__('Column type %s does not exist'), $type), E_USER_WARNING);
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return null;
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}
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$real = $this->columns[$type];
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$out = $this->name($name) . ' ' . $real['name'];
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if (isset($column['key']) && $column['key'] == 'primary' && $type == 'integer') {
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return $this->name($name) . ' ' . $this->columns['primary_key']['name'];
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}
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return parent::buildColumn($column);
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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 $enc Database encoding
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*/
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function setEncoding($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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function getEncoding() {
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return $this->fetchRow('PRAGMA encoding');
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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
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* @param string $table
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* @return string
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*/
|
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function buildIndex($indexes, $table = null) {
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$join = array();
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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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$out = 'CREATE ';
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|
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if (!empty($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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$out .= "INDEX {$name} 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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|
|
/**
|
|
* Overrides DboSource::index to handle SQLite indexe introspection
|
|
* Returns an array of the indexes in given table name.
|
|
*
|
|
* @param string $model Name of model to inspect
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|
* @return array Fields in table. Keys are column and unique
|
|
*/
|
|
function index(&$model) {
|
|
$index = array();
|
|
$table = $this->fullTableName($model);
|
|
if ($table) {
|
|
$indexes = $this->query('PRAGMA index_list(' . $table . ')');
|
|
$tableInfo = $this->query('PRAGMA table_info(' . $table . ')');
|
|
foreach ($indexes as $i => $info) {
|
|
$key = array_pop($info);
|
|
$keyInfo = $this->query('PRAGMA index_info("' . $key['name'] . '")');
|
|
foreach ($keyInfo as $keyCol) {
|
|
if (!isset($index[$key['name']])) {
|
|
$col = array();
|
|
if (preg_match('/autoindex/', $key['name'])) {
|
|
$key['name'] = 'PRIMARY';
|
|
}
|
|
$index[$key['name']]['column'] = $keyCol[0]['name'];
|
|
$index[$key['name']]['unique'] = intval($key['unique'] == 1);
|
|
} else {
|
|
if (!is_array($index[$key['name']]['column'])) {
|
|
$col[] = $index[$key['name']]['column'];
|
|
}
|
|
$col[] = $keyCol[0]['name'];
|
|
$index[$key['name']]['column'] = $col;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return $index;
|
|
}
|
|
|
|
/**
|
|
* Overrides DboSource::renderStatement to handle schema generation with SQLite-style indexes
|
|
*
|
|
* @param string $type
|
|
* @param array $data
|
|
* @return string
|
|
*/
|
|
function renderStatement($type, $data) {
|
|
switch (strtolower($type)) {
|
|
case 'schema':
|
|
extract($data);
|
|
|
|
foreach (array('columns', 'indexes') as $var) {
|
|
if (is_array(${$var})) {
|
|
${$var} = "\t" . implode(",\n\t", array_filter(${$var}));
|
|
}
|
|
}
|
|
return "CREATE TABLE {$table} (\n{$columns});\n{$indexes}";
|
|
break;
|
|
default:
|
|
return parent::renderStatement($type, $data);
|
|
break;
|
|
}
|
|
}
|
|
}
|