856 lines
25 KiB
PHP
856 lines
25 KiB
PHP
<?php
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/**
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* MS SQL Server layer for DBO
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*
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* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (https://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. (https://cakefoundation.org)
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* @link https://cakephp.org CakePHP(tm) Project
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* @package Cake.Model.Datasource.Database
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* @since CakePHP(tm) v 0.10.5.1790
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* @license https://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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/**
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* Dbo layer for Microsoft's official SQLServer driver
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*
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* A Dbo layer for MS SQL Server 2005 and higher. Requires the
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* `pdo_sqlsrv` extension to be enabled.
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*
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* @link http://www.php.net/manual/en/ref.pdo-sqlsrv.php
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*
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* @package Cake.Model.Datasource.Database
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*/
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class Sqlserver extends DboSource {
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/**
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* Driver description
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*
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* @var string
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*/
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public $description = "SQL Server DBO Driver";
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/**
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* Starting quote character 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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* Ending quote character 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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* Creates a map between field aliases and numeric indexes. Workaround for the
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* SQL Server driver's 30-character column name limitation.
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*
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* @var array
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*/
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protected $_fieldMappings = array();
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/**
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* Storing the last affected value
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*
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* @var mixed
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*/
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protected $_lastAffected = false;
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/**
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* Base configuration settings for MS SQL 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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'host' => 'localhost\SQLEXPRESS',
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'login' => '',
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'password' => '',
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'database' => 'cake',
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'schema' => '',
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'flags' => array()
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);
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/**
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* MS SQL column definition
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*
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* @var array
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* @link https://msdn.microsoft.com/en-us/library/ms187752.aspx SQL Server Data Types
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*/
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public $columns = array(
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'primary_key' => array('name' => 'IDENTITY (1, 1) NOT NULL'),
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'string' => array('name' => 'nvarchar', 'limit' => '255'),
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'text' => array('name' => 'nvarchar', 'limit' => 'MAX'),
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'integer' => array('name' => 'int', 'formatter' => 'intval'),
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'smallinteger' => array('name' => 'smallint', 'formatter' => 'intval'),
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'tinyinteger' => array('name' => 'tinyint', 'formatter' => 'intval'),
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'biginteger' => array('name' => 'bigint'),
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'numeric' => array('name' => 'decimal', 'formatter' => 'floatval'),
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'decimal' => array('name' => 'decimal', 'formatter' => 'floatval'),
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'float' => array('name' => 'float', 'formatter' => 'floatval'),
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'real' => 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' => 'datetime', 'format' => 'H:i:s', 'formatter' => 'date'),
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'date' => array('name' => 'datetime', 'format' => 'Y-m-d', 'formatter' => 'date'),
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'binary' => array('name' => 'varbinary'),
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'boolean' => array('name' => 'bit')
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);
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/**
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* Magic column name used to provide pagination support for SQLServer 2008
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* which lacks proper limit/offset support.
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*
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* @var string
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*/
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const ROW_COUNTER = '_cake_page_rownum_';
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/**
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* Connects to the database using options in the given configuration array.
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*
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* Please note that the PDO::ATTR_PERSISTENT attribute is not supported by
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* the SQL Server PHP PDO drivers. As a result you cannot use the
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* persistent config option when connecting to a SQL Server (for more
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* information see: https://github.com/Microsoft/msphpsql/issues/65).
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*
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* @return bool True if the database could be connected, else false
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* @throws InvalidArgumentException if an unsupported setting is in the database config
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* @throws MissingConnectionException
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*/
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public function connect() {
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$config = $this->config;
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$this->connected = false;
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if (isset($config['persistent']) && $config['persistent']) {
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throw new InvalidArgumentException('Config setting "persistent" cannot be set to true, as the Sqlserver PDO driver does not support PDO::ATTR_PERSISTENT');
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}
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$flags = $config['flags'] + array(
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
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);
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if (!empty($config['encoding'])) {
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$flags[PDO::SQLSRV_ATTR_ENCODING] = $config['encoding'];
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}
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try {
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$this->_connection = new PDO(
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"sqlsrv:server={$config['host']};Database={$config['database']}",
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$config['login'],
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$config['password'],
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$flags
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);
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$this->connected = true;
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if (!empty($config['settings'])) {
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foreach ($config['settings'] as $key => $value) {
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$this->_execute("SET $key $value");
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}
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}
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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 that PDO SQL Server 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('sqlsrv', PDO::getAvailableDrivers());
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}
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/**
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* Returns an array of sources (tables) in the database.
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*
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* @param mixed $data The names
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* @return array Array of table names in the database
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*/
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public function listSources($data = null) {
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$cache = parent::listSources();
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if ($cache !== null) {
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return $cache;
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}
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$result = $this->_execute("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES");
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if (!$result) {
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$result->closeCursor();
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return array();
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}
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$tables = array();
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while ($line = $result->fetch(PDO::FETCH_NUM)) {
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$tables[] = $line[0];
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}
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$result->closeCursor();
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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 $model Model object to describe, or a string table name.
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* @return array Fields in table. Keys are name and type
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* @throws CakeException
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*/
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public function describe($model) {
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$table = $this->fullTableName($model, false, false);
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$fulltable = $this->fullTableName($model, false, true);
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$cache = parent::describe($fulltable);
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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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$schema = is_object($model) ? $model->schemaName : false;
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$cols = $this->_execute(
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"SELECT
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COLUMN_NAME as Field,
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DATA_TYPE as Type,
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COL_LENGTH('" . ($schema ? $fulltable : $table) . "', COLUMN_NAME) as Length,
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IS_NULLABLE As [Null],
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COLUMN_DEFAULT as [Default],
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COLUMNPROPERTY(OBJECT_ID('" . ($schema ? $fulltable : $table) . "'), COLUMN_NAME, 'IsIdentity') as [Key],
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NUMERIC_SCALE as Size
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FROM INFORMATION_SCHEMA.COLUMNS
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WHERE TABLE_NAME = '" . $table . "'" . ($schema ? " AND TABLE_SCHEMA = '" . $schema . "'" : '')
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);
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if (!$cols) {
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throw new CakeException(__d('cake_dev', 'Could not describe table for %s', $table));
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}
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while ($column = $cols->fetch(PDO::FETCH_OBJ)) {
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$field = $column->Field;
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$fields[$field] = array(
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'type' => $this->column($column),
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'null' => ($column->Null === 'YES' ? true : false),
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'default' => $column->Default,
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'length' => $this->length($column),
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'key' => ($column->Key == '1') ? 'primary' : false
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);
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if ($fields[$field]['default'] === 'null') {
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$fields[$field]['default'] = null;
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}
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if ($fields[$field]['default'] !== null) {
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$fields[$field]['default'] = preg_replace(
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"/^[(]{1,2}'?([^')]*)?'?[)]{1,2}$/",
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"$1",
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$fields[$field]['default']
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);
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$this->value($fields[$field]['default'], $fields[$field]['type']);
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}
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if ($fields[$field]['key'] !== false && $fields[$field]['type'] === 'integer') {
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$fields[$field]['length'] = 11;
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} elseif ($fields[$field]['key'] === false) {
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unset($fields[$field]['key']);
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}
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if (in_array($fields[$field]['type'], array('date', 'time', 'datetime', 'timestamp'))) {
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$fields[$field]['length'] = null;
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}
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if ($fields[$field]['type'] === 'float' && !empty($column->Size)) {
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$fields[$field]['length'] = $fields[$field]['length'] . ',' . $column->Size;
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}
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}
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$this->_cacheDescription($table, $fields);
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$cols->closeCursor();
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return $fields;
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}
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/**
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* Generates the fields list of an SQL query.
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*
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* @param Model $model The model to get fields for.
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* @param string $alias Alias table name
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* @param array $fields The fields so far.
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* @param bool $quote Whether or not to quote identfiers.
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* @return array
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*/
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public function fields(Model $model, $alias = null, $fields = array(), $quote = true) {
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if (empty($alias)) {
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$alias = $model->alias;
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}
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$fields = parent::fields($model, $alias, $fields, false);
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$count = count($fields);
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if ($count >= 1 && strpos($fields[0], 'COUNT(*)') === false) {
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$result = array();
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for ($i = 0; $i < $count; $i++) {
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$prepend = '';
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if (strpos($fields[$i], 'DISTINCT') !== false && strpos($fields[$i], 'COUNT') === false) {
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$prepend = 'DISTINCT ';
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$fields[$i] = trim(str_replace('DISTINCT', '', $fields[$i]));
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}
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if (strpos($fields[$i], 'COUNT(DISTINCT') !== false) {
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$prepend = 'COUNT(DISTINCT ';
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$fields[$i] = trim(str_replace('COUNT(DISTINCT', '', $this->_quoteFields($fields[$i])));
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}
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if (!preg_match('/\s+AS\s+/i', $fields[$i])) {
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if (substr($fields[$i], -1) === '*') {
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if (strpos($fields[$i], '.') !== false && $fields[$i] != $alias . '.*') {
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$build = explode('.', $fields[$i]);
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$AssociatedModel = $model->{$build[0]};
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} else {
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$AssociatedModel = $model;
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}
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$_fields = $this->fields($AssociatedModel, $AssociatedModel->alias, array_keys($AssociatedModel->schema()));
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$result = array_merge($result, $_fields);
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continue;
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}
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if (strpos($fields[$i], '.') === false) {
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$this->_fieldMappings[$alias . '__' . $fields[$i]] = $alias . '.' . $fields[$i];
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$fieldName = $this->name($alias . '.' . $fields[$i]);
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$fieldAlias = $this->name($alias . '__' . $fields[$i]);
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} else {
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$build = explode('.', $fields[$i]);
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$build[0] = trim($build[0], '[]');
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$build[1] = trim($build[1], '[]');
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$name = $build[0] . '.' . $build[1];
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$alias = $build[0] . '__' . $build[1];
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$this->_fieldMappings[$alias] = $name;
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$fieldName = $this->name($name);
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$fieldAlias = $this->name($alias);
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}
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if ($model->getColumnType($fields[$i]) === 'datetime') {
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$fieldName = "CONVERT(VARCHAR(20), {$fieldName}, 20)";
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}
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$fields[$i] = "{$fieldName} AS {$fieldAlias}";
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}
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$result[] = $prepend . $fields[$i];
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}
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return $result;
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}
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return $fields;
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}
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/**
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* Generates and executes an SQL INSERT statement for given model, fields, and values.
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* Removes Identity (primary key) column from update data before returning to parent, if
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* value is empty.
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*
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* @param Model $model The model to insert into.
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* @param array $fields The fields to set.
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* @param array $values The values to set.
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* @return array
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*/
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public function create(Model $model, $fields = null, $values = null) {
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if (!empty($values)) {
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$fields = array_combine($fields, $values);
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}
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$primaryKey = $this->_getPrimaryKey($model);
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if (array_key_exists($primaryKey, $fields)) {
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if (empty($fields[$primaryKey])) {
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unset($fields[$primaryKey]);
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} else {
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$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($model) . ' ON');
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}
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}
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$result = parent::create($model, array_keys($fields), array_values($fields));
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if (array_key_exists($primaryKey, $fields) && !empty($fields[$primaryKey])) {
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$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($model) . ' OFF');
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}
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return $result;
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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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* Removes Identity (primary key) column from update data before returning to parent.
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*
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* @param Model $model The model to update.
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* @param array $fields The fields to set.
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* @param array $values The values to set.
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* @param mixed $conditions The 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)) {
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$fields = array_combine($fields, $values);
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}
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if (isset($fields[$model->primaryKey])) {
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unset($fields[$model->primaryKey]);
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}
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if (empty($fields)) {
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return true;
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}
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return parent::update($model, array_keys($fields), array_values($fields), $conditions);
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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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$rt = '';
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if (!strpos(strtolower($limit), 'top') || strpos(strtolower($limit), 'top') === 0) {
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$rt = ' TOP';
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}
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$rt .= sprintf(' %u', $limit);
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if ((is_int($offset) || ctype_digit($offset)) && $offset > 0) {
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$rt = sprintf(' OFFSET %u ROWS FETCH FIRST %u ROWS ONLY', $offset, $limit);
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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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* Converts database-layer column types to basic types
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*
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* @param mixed $real Either the string value of the fields type.
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* or the Result object from Sqlserver::describe()
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* @return string Abstract column type (i.e. "string")
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*/
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public function column($real) {
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$limit = null;
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$col = $real;
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if (is_object($real) && isset($real->Field)) {
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$limit = $real->Length;
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$col = $real->Type;
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}
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if ($col === 'datetime2') {
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return 'datetime';
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}
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if (in_array($col, array('date', 'time', 'datetime', 'timestamp'))) {
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return $col;
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}
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if ($col === 'bit') {
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return 'boolean';
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}
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if (strpos($col, 'bigint') !== false) {
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return 'biginteger';
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}
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if (strpos($col, 'smallint') !== false) {
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return 'smallinteger';
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}
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if (strpos($col, 'tinyint') !== false) {
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return 'tinyinteger';
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}
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if (strpos($col, 'int') !== false) {
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return 'integer';
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}
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if (strpos($col, 'char') !== false && $limit == -1) {
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return 'text';
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}
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if (strpos($col, 'char') !== false) {
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return 'string';
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}
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if (strpos($col, 'text') !== false) {
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return 'text';
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}
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if (strpos($col, 'binary') !== false || $col === 'image') {
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return 'binary';
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}
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if (in_array($col, array('float', 'real'))) {
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return 'float';
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}
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if (in_array($col, array('decimal', 'numeric'))) {
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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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* Handle SQLServer specific length properties.
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* SQLServer handles text types as nvarchar/varchar with a length of -1.
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*
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* @param mixed $length Either the length as a string, or a Column descriptor object.
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* @return mixed null|integer with length of column.
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*/
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public function length($length) {
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if (is_object($length) && isset($length->Length)) {
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if ($length->Length == -1 && strpos($length->Type, 'char') !== false) {
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return null;
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}
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if (in_array($length->Type, array('nchar', 'nvarchar'))) {
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return floor($length->Length / 2);
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}
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if ($length->Type === 'text') {
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return null;
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}
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return $length->Length;
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}
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return parent::length($length);
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}
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/**
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* Builds a map of the columns contained in a result
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*
|
|
* @param PDOStatement $results The result to modify.
|
|
* @return void
|
|
*/
|
|
public function resultSet($results) {
|
|
$this->map = array();
|
|
$numFields = $results->columnCount();
|
|
$index = 0;
|
|
|
|
while ($numFields-- > 0) {
|
|
$column = $results->getColumnMeta($index);
|
|
$name = $column['name'];
|
|
|
|
if (strpos($name, '__')) {
|
|
if (isset($this->_fieldMappings[$name]) && strpos($this->_fieldMappings[$name], '.')) {
|
|
$map = explode('.', $this->_fieldMappings[$name]);
|
|
} elseif (isset($this->_fieldMappings[$name])) {
|
|
$map = array(0, $this->_fieldMappings[$name]);
|
|
} else {
|
|
$map = array(0, $name);
|
|
}
|
|
} else {
|
|
$map = array(0, $name);
|
|
}
|
|
$map[] = ($column['sqlsrv:decl_type'] === 'bit') ? 'boolean' : $column['native_type'];
|
|
$this->map[$index++] = $map;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Builds final SQL statement
|
|
*
|
|
* @param string $type Query type
|
|
* @param array $data Query data
|
|
* @return string
|
|
*/
|
|
public function renderStatement($type, $data) {
|
|
switch (strtolower($type)) {
|
|
case 'select':
|
|
extract($data);
|
|
$fields = trim($fields);
|
|
|
|
$having = !empty($having) ? " $having" : '';
|
|
$lock = !empty($lock) ? " $lock" : '';
|
|
|
|
if (strpos($limit, 'TOP') !== false && strpos($fields, 'DISTINCT ') === 0) {
|
|
$limit = 'DISTINCT ' . trim($limit);
|
|
$fields = substr($fields, 9);
|
|
}
|
|
|
|
// hack order as SQLServer requires an order if there is a limit.
|
|
if ($limit && !$order) {
|
|
$order = 'ORDER BY (SELECT NULL)';
|
|
}
|
|
|
|
// For older versions use the subquery version of pagination.
|
|
if (version_compare($this->getVersion(), '11', '<') && preg_match('/FETCH\sFIRST\s+([0-9]+)/i', $limit, $offset)) {
|
|
preg_match('/OFFSET\s*(\d+)\s*.*?(\d+)\s*ROWS/', $limit, $limitOffset);
|
|
|
|
$limit = 'TOP ' . (int)$limitOffset[2];
|
|
$page = (int)($limitOffset[1] / $limitOffset[2]);
|
|
$offset = (int)($limitOffset[2] * $page);
|
|
|
|
$rowCounter = static::ROW_COUNTER;
|
|
$sql = "SELECT {$limit} * FROM (
|
|
SELECT {$fields}, ROW_NUMBER() OVER ({$order}) AS {$rowCounter}
|
|
FROM {$table} {$alias}{$lock} {$joins} {$conditions} {$group}{$having}
|
|
) AS _cake_paging_
|
|
WHERE _cake_paging_.{$rowCounter} > {$offset}
|
|
ORDER BY _cake_paging_.{$rowCounter}
|
|
";
|
|
return trim($sql);
|
|
}
|
|
if (strpos($limit, 'FETCH') !== false) {
|
|
return trim("SELECT {$fields} FROM {$table} {$alias}{$lock} {$joins} {$conditions} {$group}{$having} {$order} {$limit}");
|
|
}
|
|
return trim("SELECT {$limit} {$fields} FROM {$table} {$alias}{$lock} {$joins} {$conditions} {$group}{$having} {$order}");
|
|
case "schema":
|
|
extract($data);
|
|
|
|
foreach ($indexes as $i => $index) {
|
|
if (preg_match('/PRIMARY KEY/', $index)) {
|
|
unset($indexes[$i]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
foreach (array('columns', 'indexes') as $var) {
|
|
if (is_array(${$var})) {
|
|
${$var} = "\t" . implode(",\n\t", array_filter(${$var}));
|
|
}
|
|
}
|
|
return trim("CREATE TABLE {$table} (\n{$columns});\n{$indexes}");
|
|
default:
|
|
return parent::renderStatement($type, $data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a quoted and escaped string of $data for use in an SQL statement.
|
|
*
|
|
* @param string $data String to be prepared for use in an SQL statement
|
|
* @param string $column The column into which this data will be inserted
|
|
* @param bool $null Column allows NULL values
|
|
* @return string Quoted and escaped data
|
|
*/
|
|
public function value($data, $column = null, $null = true) {
|
|
if ($data === null || is_array($data) || is_object($data)) {
|
|
return parent::value($data, $column, $null);
|
|
}
|
|
if (in_array($data, array('{$__cakeID__$}', '{$__cakeForeignKey__$}'), true)) {
|
|
return $data;
|
|
}
|
|
|
|
if (empty($column)) {
|
|
$column = $this->introspectType($data);
|
|
}
|
|
|
|
switch ($column) {
|
|
case 'string':
|
|
case 'text':
|
|
return 'N' . $this->_connection->quote($data, PDO::PARAM_STR);
|
|
default:
|
|
return parent::value($data, $column, $null);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns an array of all result rows for a given SQL query.
|
|
* Returns false if no rows matched.
|
|
*
|
|
* @param Model $model The model to read from
|
|
* @param array $queryData The query data
|
|
* @param int $recursive How many layers to go.
|
|
* @return array|false Array of resultset rows, or false if no rows matched
|
|
*/
|
|
public function read(Model $model, $queryData = array(), $recursive = null) {
|
|
$results = parent::read($model, $queryData, $recursive);
|
|
$this->_fieldMappings = array();
|
|
return $results;
|
|
}
|
|
|
|
/**
|
|
* Fetches the next row from the current result set.
|
|
* Eats the magic ROW_COUNTER variable.
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public function fetchResult() {
|
|
if ($row = $this->_result->fetch(PDO::FETCH_NUM)) {
|
|
$resultRow = array();
|
|
foreach ($this->map as $col => $meta) {
|
|
list($table, $column, $type) = $meta;
|
|
if ($table === 0 && $column === static::ROW_COUNTER) {
|
|
continue;
|
|
}
|
|
$resultRow[$table][$column] = $row[$col];
|
|
if ($type === 'boolean' && $row[$col] !== null) {
|
|
$resultRow[$table][$column] = $this->boolean($resultRow[$table][$column]);
|
|
}
|
|
}
|
|
return $resultRow;
|
|
}
|
|
$this->_result->closeCursor();
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Inserts multiple values into a table
|
|
*
|
|
* @param string $table The table to insert into.
|
|
* @param string $fields The fields to set.
|
|
* @param array $values The values to set.
|
|
* @return void
|
|
*/
|
|
public function insertMulti($table, $fields, $values) {
|
|
$primaryKey = $this->_getPrimaryKey($table);
|
|
$hasPrimaryKey = $primaryKey && (
|
|
(is_array($fields) && in_array($primaryKey, $fields)
|
|
|| (is_string($fields) && strpos($fields, $this->startQuote . $primaryKey . $this->endQuote) !== false))
|
|
);
|
|
|
|
if ($hasPrimaryKey) {
|
|
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($table) . ' ON');
|
|
}
|
|
|
|
parent::insertMulti($table, $fields, $values);
|
|
|
|
if ($hasPrimaryKey) {
|
|
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($table) . ' OFF');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Generate a database-native column schema string
|
|
*
|
|
* @param array $column An array structured like the
|
|
* following: array('name'=>'value', 'type'=>'value'[, options]),
|
|
* where options can be 'default', 'length', or 'key'.
|
|
* @return string
|
|
*/
|
|
public function buildColumn($column) {
|
|
$result = parent::buildColumn($column);
|
|
$result = preg_replace('/(bigint|int|integer)\([0-9]+\)/i', '$1', $result);
|
|
$result = preg_replace('/(bit)\([0-9]+\)/i', '$1', $result);
|
|
if (strpos($result, 'DEFAULT NULL') !== false) {
|
|
if (isset($column['default']) && $column['default'] === '') {
|
|
$result = str_replace('DEFAULT NULL', "DEFAULT ''", $result);
|
|
} else {
|
|
$result = str_replace('DEFAULT NULL', 'NULL', $result);
|
|
}
|
|
} elseif (array_keys($column) === array('type', 'name')) {
|
|
$result .= ' NULL';
|
|
} elseif (strpos($result, "DEFAULT N'")) {
|
|
$result = str_replace("DEFAULT N'", "DEFAULT '", $result);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Format indexes for create table
|
|
*
|
|
* @param array $indexes The indexes to build
|
|
* @param string $table The table to make indexes for.
|
|
* @return string
|
|
*/
|
|
public function buildIndex($indexes, $table = null) {
|
|
$join = array();
|
|
|
|
foreach ($indexes as $name => $value) {
|
|
if ($name === 'PRIMARY') {
|
|
$join[] = 'PRIMARY KEY (' . $this->name($value['column']) . ')';
|
|
} elseif (isset($value['unique']) && $value['unique']) {
|
|
$out = "ALTER TABLE {$table} ADD CONSTRAINT {$name} UNIQUE";
|
|
|
|
if (is_array($value['column'])) {
|
|
$value['column'] = implode(', ', array_map(array(&$this, 'name'), $value['column']));
|
|
} else {
|
|
$value['column'] = $this->name($value['column']);
|
|
}
|
|
$out .= "({$value['column']});";
|
|
$join[] = $out;
|
|
}
|
|
}
|
|
return $join;
|
|
}
|
|
|
|
/**
|
|
* Makes sure it will return the primary key
|
|
*
|
|
* @param Model|string $model Model instance of table name
|
|
* @return string
|
|
*/
|
|
protected function _getPrimaryKey($model) {
|
|
$schema = $this->describe($model);
|
|
foreach ($schema as $field => $props) {
|
|
if (isset($props['key']) && $props['key'] === 'primary') {
|
|
return $field;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Returns number of affected rows in previous database operation. If no previous operation exists,
|
|
* this returns false.
|
|
*
|
|
* @param mixed $source Unused
|
|
* @return int Number of affected rows
|
|
*/
|
|
public function lastAffected($source = null) {
|
|
$affected = parent::lastAffected();
|
|
if ($affected === null && $this->_lastAffected !== false) {
|
|
return $this->_lastAffected;
|
|
}
|
|
return $affected;
|
|
}
|
|
|
|
/**
|
|
* Executes given SQL statement.
|
|
*
|
|
* @param string $sql SQL statement
|
|
* @param array $params list of params to be bound to query (supported only in select)
|
|
* @param array $prepareOptions Options to be used in the prepare statement
|
|
* @return mixed PDOStatement if query executes with no problem, true as the result of a successful, false on error
|
|
* query returning no rows, such as a CREATE statement, false otherwise
|
|
* @throws PDOException
|
|
*/
|
|
protected function _execute($sql, $params = array(), $prepareOptions = array()) {
|
|
$this->_lastAffected = false;
|
|
$sql = trim($sql);
|
|
if (strncasecmp($sql, 'SELECT', 6) === 0 || preg_match('/^EXEC(?:UTE)?\s/mi', $sql) > 0) {
|
|
$prepareOptions += array(PDO::ATTR_CURSOR => PDO::CURSOR_SCROLL);
|
|
return parent::_execute($sql, $params, $prepareOptions);
|
|
}
|
|
try {
|
|
$this->_lastAffected = $this->_connection->exec($sql);
|
|
if ($this->_lastAffected === false) {
|
|
$this->_results = null;
|
|
$error = $this->_connection->errorInfo();
|
|
$this->error = $error[2];
|
|
return false;
|
|
}
|
|
return true;
|
|
} catch (PDOException $e) {
|
|
if (isset($query->queryString)) {
|
|
$e->queryString = $query->queryString;
|
|
} else {
|
|
$e->queryString = $sql;
|
|
}
|
|
throw $e;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Generate a "drop table" statement for the given table
|
|
*
|
|
* @param type $table Name of the table to drop
|
|
* @return string Drop table SQL statement
|
|
*/
|
|
protected function _dropTable($table) {
|
|
return "IF OBJECT_ID('" . $this->fullTableName($table, false) . "', 'U') IS NOT NULL DROP TABLE " . $this->fullTableName($table) . ";";
|
|
}
|
|
|
|
/**
|
|
* Gets the schema name
|
|
*
|
|
* @return string The schema name
|
|
*/
|
|
public function getSchemaName() {
|
|
return $this->config['schema'];
|
|
}
|
|
|
|
/**
|
|
* Returns a locking hint for the given mode.
|
|
*
|
|
* Currently, this method only returns WITH (UPDLOCK) when the mode is set to true.
|
|
*
|
|
* @param mixed $mode Lock mode
|
|
* @return string|null WITH (UPDLOCK) clause or null
|
|
*/
|
|
public function getLockingHint($mode) {
|
|
if ($mode !== true) {
|
|
return null;
|
|
}
|
|
return ' WITH (UPDLOCK)';
|
|
}
|
|
}
|