mirror of
https://github.com/silverstripe/silverstripe-mssql
synced 2024-10-01 05:39:27 +02:00
1591 lines
49 KiB
PHP
1591 lines
49 KiB
PHP
<?php
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/**
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* Microsoft SQL Server 2008+ connector class.
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*
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* <h2>Connecting using Windows</h2>
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*
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* If you've got your website running on Windows, it's highly recommended you
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* use Microsoft SQL Server Driver for PHP "sqlsrv".
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*
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* @see http://sqlsrvphp.codeplex.com/
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*
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* <h2>Connecting using Linux or Mac OS X</h2>
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*
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* The following commands assume you used the default package manager
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* to install PHP with the operating system.
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*
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* Debian, and Ubuntu:
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* <code>apt-get install php5-sybase</code>
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*
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* Fedora, CentOS and RedHat:
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* <code>yum install php-mssql</code>
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*
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* Mac OS X (MacPorts):
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* <code>port install php5-mssql</code>
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*
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* These packages will install the mssql extension for PHP, as well
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* as FreeTDS, which will let you connect to SQL Server from Linux and Mac OS X.
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*
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* More information available in the SilverStripe developer wiki:
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* @see http://doc.silverstripe.org/modules:mssql
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*
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* References:
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* @see http://freetds.org
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*
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* @package mssql
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*/
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class MSSQLDatabase extends SS_Database {
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/**
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* Connection to the DBMS.
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* @var resource
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*/
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protected $dbConn;
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/**
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* True if we are connected to a database.
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* @var boolean
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*/
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protected $active;
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/**
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* The name of the database.
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* @var string
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*/
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protected $database;
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/**
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* If true, use the mssql_... functions.
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* If false use the sqlsrv_... functions
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*/
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protected $mssql = null;
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/**
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* Stores the affected rows of the last query.
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* Used by sqlsrv functions only, as sqlsrv_rows_affected
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* accepts a result instead of a database handle.
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*/
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protected $lastAffectedRows;
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/**
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* Words that will trigger an error if passed to a SQL Server fulltext search
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*/
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public static $noiseWords = array("about", "1", "after", "2", "all", "also", "3", "an", "4", "and", "5", "another", "6", "any", "7", "are", "8", "as", "9", "at", "0", "be", "$", "because", "been", "before", "being", "between", "both", "but", "by", "came", "can", "come", "could", "did", "do", "does", "each", "else", "for", "from", "get", "got", "has", "had", "he", "have", "her", "here", "him", "himself", "his", "how", "if", "in", "into", "is", "it", "its", "just", "like", "make", "many", "me", "might", "more", "most", "much", "must", "my", "never", "no", "now", "of", "on", "only", "or", "other", "our", "out", "over", "re", "said", "same", "see", "should", "since", "so", "some", "still", "such", "take", "than", "that", "the", "their", "them", "then", "there", "these", "they", "this", "those", "through", "to", "too", "under", "up", "use", "very", "want", "was", "way", "we", "well", "were", "what", "when", "where", "which", "while", "who", "will", "with", "would", "you", "your", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z");
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protected $supportsTransactions = true;
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/**
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* Cached flag to determine if full-text is enabled. This is set by
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* {@link MSSQLDatabase::fullTextEnabled()}
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*
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* @var boolean
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*/
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protected $fullTextEnabled = null;
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/**
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* @ignore
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*/
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protected static $collation = null;
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/**
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* Set the default collation of the MSSQL nvarchar fields that we create.
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* We don't apply this to the database as a whole, so that we can use unicode collations.
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*/
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public static function set_collation($collation) {
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self::$collation = $collation;
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}
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/**
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* Connect to a MS SQL database.
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* @param array $parameters An map of parameters, which should include:
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* - server: The server, eg, localhost
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* - username: The username to log on with
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* - password: The password to log on with
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* - database: The database to connect to
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*/
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public function __construct($parameters) {
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if(function_exists('mssql_connect')) {
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$this->mssql = true;
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} else if(function_exists('sqlsrv_connect')) {
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$this->mssql = false;
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} else {
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user_error("Neither the mssql_connect() nor the sqlsrv_connect() functions are available. Please install the PHP native mssql module, or the Microsoft-provided sqlsrv module.", E_USER_ERROR);
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}
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if($this->mssql) {
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// Switch to utf8 connection charset
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ini_set('mssql.charset', 'utf8');
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$this->dbConn = mssql_connect($parameters['server'], $parameters['username'], $parameters['password'], true);
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} else {
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// Disable default warnings as errors behaviour for sqlsrv to keep it in line with mssql functions
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if(ini_get('sqlsrv.WarningsReturnAsErrors')) {
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ini_set('sqlsrv.WarningsReturnAsErrors', 'Off');
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}
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// Windows authentication doesn't require a username and password
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if(defined('MSSQL_USE_WINDOWS_AUTHENTICATION') && MSSQL_USE_WINDOWS_AUTHENTICATION == true) {
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$connectionInfo = array();
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} else {
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$connectionInfo = array(
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'UID' => $parameters['username'],
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'PWD' => $parameters['password'],
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'CharacterSet' => 'UTF-8',
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);
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}
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$this->dbConn = sqlsrv_connect($parameters['server'], $connectionInfo);
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}
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if(!$this->dbConn) {
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$this->databaseError("Couldn't connect to MS SQL database");
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} else {
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$this->database = $parameters['database'];
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$this->selectDatabase($this->database);
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// Configure the connection
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$this->query('SET QUOTED_IDENTIFIER ON');
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$this->query('SET TEXTSIZE 2147483647');
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}
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}
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public function __destruct() {
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if(is_resource($this->dbConn)) {
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if($this->mssql) {
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mssql_close($this->dbConn);
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} else {
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sqlsrv_close($this->dbConn);
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}
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}
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}
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/**
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* Checks whether the current SQL Server version has full-text
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* support installed and full-text is enabled for this database.
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*
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* @return boolean
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*/
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public function fullTextEnabled() {
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if($this->fullTextEnabled === null) {
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$isInstalled = (boolean) DB::query("SELECT fulltextserviceproperty('isfulltextinstalled')")->value();
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$enabledForDb = (boolean) DB::query("
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SELECT is_fulltext_enabled
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FROM sys.databases
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WHERE name = '$this->database'
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")->value();
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$this->fullTextEnabled = (boolean) ($isInstalled && $enabledForDb);
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}
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return $this->fullTextEnabled;
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}
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/**
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* Throw a database error
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*/
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function databaseError($message, $errorLevel = E_USER_ERROR) {
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if(!$this->mssql) {
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$errorMessages = array();
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foreach(sqlsrv_errors() as $error) {
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$errorMessages[] = $error['message'];
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}
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$message .= ": \n" . implode("; ",$errorMessages);
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}
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return parent::databaseError($message, $errorLevel);
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}
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/**
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* This will set up the full text search capabilities.
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*
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* TODO: make this a _config.php setting
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* TODO: VERY IMPORTANT: move this so it only gets called upon a dev/build action
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*/
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function createFullTextCatalog() {
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if($this->fullTextEnabled()) {
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$result = $this->query("SELECT name FROM sys.fulltext_catalogs WHERE name = 'ftCatalog';")->value();
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if(!$result) $this->query("CREATE FULLTEXT CATALOG ftCatalog AS DEFAULT;");
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}
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}
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/**
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* Not implemented, needed for PDO
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*/
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public function getConnect($parameters) {
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return null;
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}
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/**
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* Returns true if this database supports collations
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* @return boolean
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*/
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public function supportsCollations() {
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return true;
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}
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/**
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* Get the version of MSSQL.
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* @return string
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*/
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public function getVersion() {
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return trim($this->query("SELECT CONVERT(char(15), SERVERPROPERTY('ProductVersion'))")->value());
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}
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/**
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* Get the database server, namely mssql.
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* @return string
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*/
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public function getDatabaseServer() {
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return "mssql";
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}
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public function query($sql, $errorLevel = E_USER_ERROR) {
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if(isset($_REQUEST['previewwrite']) && in_array(strtolower(substr($sql,0,strpos($sql,' '))), array('insert','update','delete','replace'))) {
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Debug::message("Will execute: $sql");
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return;
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}
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if(isset($_REQUEST['showqueries'])) {
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$starttime = microtime(true);
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}
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$error = '';
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if($this->mssql) {
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$handle = mssql_query($sql, $this->dbConn);
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$error = mssql_get_last_message();
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} else {
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$handle = sqlsrv_query($this->dbConn, $sql);
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if($handle) $this->lastAffectedRows = sqlsrv_rows_affected($handle);
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if(function_exists('sqlsrv_errors')) {
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$errInfo = sqlsrv_errors();
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if($errInfo) {
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foreach($errInfo as $info) {
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$error .= implode(', ', array($info['SQLSTATE'], $info['code'], $info['message']));
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}
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}
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}
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}
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if(isset($_REQUEST['showqueries'])) {
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$endtime = round(microtime(true) - $starttime,4);
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Debug::message("\n$sql\n{$endtime}ms\n", false);
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}
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if(!$handle && $errorLevel) $this->databaseError("Couldn't run query ($error): $sql", $errorLevel);
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return new MSSQLQuery($this, $handle, $this->mssql);
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}
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public function getGeneratedID($table) {
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//return $this->query("SELECT @@IDENTITY FROM \"$table\"")->value();
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return $this->query("SELECT IDENT_CURRENT('$table')")->value();
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}
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/*
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* This is a handy helper function which will return the primary key for any paricular table
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* In MSSQL, the primary key is often an internal identifier, NOT the standard name (ie, 'ID'),
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* so we need to do a lookup for it.
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*/
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function getPrimaryKey($tableName){
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$indexes=DB::query("EXEC sp_helpindex '$tableName';");
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$primary_key='';
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foreach($indexes as $this_index){
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if($this_index['index_keys']=='ID'){
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$primary_key=$this_index['index_name'];
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break;
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}
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}
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return $primary_key;
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}
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/**
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* OBSOLETE: Get the ID for the next new record for the table.
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* @param string $table The name of the table
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* @return int
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*/
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public function getNextID($table) {
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user_error('getNextID is OBSOLETE (and will no longer work properly)', E_USER_WARNING);
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$result = $this->query("SELECT MAX(ID)+1 FROM \"$table\"")->value();
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return $result ? $result : 1;
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}
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public function isActive() {
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return $this->active ? true : false;
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}
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/**
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* Create the database that is currently selected.
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*/
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public function createDatabase() {
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$this->query("CREATE DATABASE \"$this->database\"");
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$this->selectDatabase($this->database);
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}
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/**
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* Drop the database that this object is currently connected to.
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* Use with caution.
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*/
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public function dropDatabase() {
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$db = $this->database;
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$this->selectDatabase('master');
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$this->query("DROP DATABASE \"$db\"");
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$this->active = false;
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}
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/**
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* Returns the name of the currently selected database
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*/
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public function currentDatabase() {
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return $this->database;
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}
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/**
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* Switches to the given database.
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*
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* If the database doesn't exist, you should call
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* createDatabase() after calling selectDatabase()
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*
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* @param string $dbname The database name to switch to
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*/
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public function selectDatabase($dbname) {
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$this->database = $dbname;
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if($this->databaseExists($this->database)) {
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if($this->mssql) {
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if(mssql_select_db($this->database, $this->dbConn)) {
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$this->active = true;
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}
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} else {
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$this->query("USE \"$this->database\"");
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$this->active = true;
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}
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}
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$this->tableList = $this->fieldList = $this->indexList = $this->fullTextEnabled = null;
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}
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/**
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* Check if the given database exists.
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* @param string $name Name of database to check exists
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* @return boolean
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*/
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public function databaseExists($name) {
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$listDBs = $this->query('SELECT NAME FROM sys.sysdatabases');
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if($listDBs) {
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foreach($listDBs as $listedDB) {
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if($listedDB['NAME'] == $name) return true;
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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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* Create a new table.
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* @param $tableName The name of the table
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* @param $fields A map of field names to field types
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* @param $indexes A map of indexes
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* @param $options An map of additional options. The available keys are as follows:
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* - 'MSSQLDatabase'/'MySQLDatabase'/'PostgreSQLDatabase' - database-specific options such as "engine" for MySQL.
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* - 'temporary' - If true, then a temporary table will be created
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* @return The table name generated. This may be different from the table name, for example with temporary tables.
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*/
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public function createTable($tableName, $fields = null, $indexes = null, $options = null, $advancedOptions = null) {
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$fieldSchemas = $indexSchemas = "";
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if($fields) foreach($fields as $k => $v) $fieldSchemas .= "\"$k\" $v,\n";
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// Temporary tables start with "#" in MSSQL-land
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if(!empty($options['temporary'])) {
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// Randomize the temp table name to avoid conflicts in the tempdb table which derived databases share
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$tableName = "#$tableName" . '-' . rand(1000000, 9999999);
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}
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$this->query("CREATE TABLE \"$tableName\" (
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$fieldSchemas
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primary key (\"ID\")
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);");
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//we need to generate indexes like this: CREATE INDEX IX_vault_to_export ON vault (to_export);
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//This needs to be done AFTER the table creation, so we can set up the fulltext indexes correctly
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if($indexes) foreach($indexes as $k => $v) {
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$indexSchemas .= $this->getIndexSqlDefinition($tableName, $k, $v) . "\n";
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}
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if($indexSchemas) $this->query($indexSchemas);
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return $tableName;
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}
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/**
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* Alter a table's schema.
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* @param $table The name of the table to alter
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* @param $newFields New fields, a map of field name => field schema
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* @param $newIndexes New indexes, a map of index name => index type
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* @param $alteredFields Updated fields, a map of field name => field schema
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* @param $alteredIndexes Updated indexes, a map of index name => index type
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*/
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public function alterTable($tableName, $newFields = null, $newIndexes = null, $alteredFields = null, $alteredIndexes = null, $alteredOptions=null, $advancedOptions=null) {
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$fieldSchemas = $indexSchemas = "";
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$alterList = array();
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$indexList = $this->indexList($tableName);
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if($newFields) foreach($newFields as $k => $v) $alterList[] .= "ALTER TABLE \"$tableName\" ADD \"$k\" $v";
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if($alteredFields) {
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// fulltext indexes need to be dropped if alterting a table
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if($this->fulltextIndexExists($tableName) === true) {
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$alterList[] = "\nDROP FULLTEXT INDEX ON \"$tableName\";";
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}
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foreach($alteredFields as $k => $v) {
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$val = $this->alterTableAlterColumn($tableName, $k, $v, $indexList);
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if($val != '') $alterList[] .= $val;
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}
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}
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if($alteredIndexes) foreach($alteredIndexes as $k => $v) $alterList[] .= $this->getIndexSqlDefinition($tableName, $k, $v);
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if($newIndexes) foreach($newIndexes as $k =>$v) $alterList[] .= $this->getIndexSqlDefinition($tableName, $k, $v);
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if($alterList) {
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foreach($alterList as $alteration) {
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if($alteration != '') {
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$this->query($alteration);
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}
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}
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}
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}
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/**
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* This is a private MSSQL-only function which returns
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* specific details about a column's constraints (if any)
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* @param string $tableName Name of table the column exists in
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* @param string $columnName Name of column to check for
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*/
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protected function ColumnConstraints($tableName, $columnName) {
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$constraint = $this->query("SELECT CC.CONSTRAINT_NAME, CAST(CHECK_CLAUSE AS TEXT) AS CHECK_CLAUSE, COLUMN_NAME FROM INFORMATION_SCHEMA.CHECK_CONSTRAINTS AS CC INNER JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE AS CCU ON CCU.CONSTRAINT_NAME=CC.CONSTRAINT_NAME WHERE TABLE_NAME='$tableName' AND COLUMN_NAME='" . $columnName . "';")->first();
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return $constraint;
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}
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/**
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* Return the name of the default constraint applied to $tableName.$colName.
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* Will return null if no such constraint exists
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*/
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protected function defaultConstraintName($tableName, $colName) {
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return $this->query("SELECT s.name --default name
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FROM sys.sysobjects s
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join sys.syscolumns c ON s.parent_obj = c.id
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WHERE s.xtype = 'd'
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and c.cdefault = s.id
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and parent_obj= OBJECT_ID('$tableName')
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and c.name = '$colName'")->value();
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}
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/**
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* Get the actual enum fields from the constraint value:
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*/
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protected function EnumValuesFromConstraint($constraint){
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$segments=preg_split('/ +OR *\[/i', $constraint);
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$constraints=Array();
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foreach($segments as $this_segment){
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$bits=preg_split('/ *= */', $this_segment);
|
|
|
|
for($i=1; $i<sizeof($bits); $i+=2)
|
|
array_unshift($constraints, substr(rtrim($bits[$i], ')'), 1, -1));
|
|
|
|
}
|
|
|
|
return $constraints;
|
|
}
|
|
|
|
/*
|
|
* Creates an ALTER expression for a column in MS SQL
|
|
*
|
|
* @param $tableName Name of the table to be altered
|
|
* @param $colName Name of the column to be altered
|
|
* @param $colSpec String which contains conditions for a column
|
|
* @return string
|
|
*/
|
|
protected function alterTableAlterColumn($tableName, $colName, $colSpec, $indexList){
|
|
|
|
// First, we split the column specifications into parts
|
|
// TODO: this returns an empty array for the following string: int(11) not null auto_increment
|
|
// on second thoughts, why is an auto_increment field being passed through?
|
|
$pattern = '/^([\w()]+)\s?((?:not\s)?null)?\s?(default\s[\w\']+)?\s?(check\s?[\w()\'",\s]+)?$/i';
|
|
$matches=Array();
|
|
preg_match($pattern, $colSpec, $matches);
|
|
|
|
// drop the index if it exists
|
|
$alterCol='';
|
|
$indexName = isset($indexList[$colName]['indexname']) ? $indexList[$colName]['indexname'] : null;
|
|
if($indexName && $colName != 'ID') {
|
|
$alterCol = "\nDROP INDEX \"$indexName\" ON \"$tableName\";";
|
|
}
|
|
|
|
$prefix="ALTER TABLE \"" . $tableName . "\" ";
|
|
|
|
// Remove the old default prior to adjusting the column.
|
|
if($defaultConstraintName = $this->defaultConstraintName($tableName, $colName)) {
|
|
$alterCol .= ";\n$prefix DROP CONSTRAINT \"$defaultConstraintName\"";
|
|
}
|
|
|
|
if(isset($matches[1])) {
|
|
//We will prevent any changes being made to the ID column. Primary key indexes will have a fit if we do anything here.
|
|
if($colName!='ID'){
|
|
$alterCol .= ";\n$prefix ALTER COLUMN \"$colName\" $matches[1]";
|
|
|
|
// SET null / not null
|
|
if(!empty($matches[2])) $alterCol .= ";\n$prefix ALTER COLUMN \"$colName\" $matches[1] $matches[2]";
|
|
|
|
// Add a default back
|
|
if(!empty($matches[3])) $alterCol .= ";\n$prefix ADD $matches[3] FOR \"$colName\"";
|
|
|
|
// SET check constraint (The constraint HAS to be dropped)
|
|
if(!empty($matches[4])) {
|
|
$constraint=$this->ColumnConstraints($tableName, $colName);
|
|
if($constraint)
|
|
$alterCol .= ";\n$prefix DROP CONSTRAINT {$constraint['CONSTRAINT_NAME']}";
|
|
|
|
//NOTE: 'with nocheck' seems to solve a few problems I've been having for modifying existing tables.
|
|
$alterCol .= ";\n$prefix WITH NOCHECK ADD CONSTRAINT \"{$tableName}_{$colName}_check\" $matches[4]";
|
|
|
|
|
|
}
|
|
}
|
|
}
|
|
return isset($alterCol) ? $alterCol : '';
|
|
}
|
|
|
|
public function renameTable($oldTableName, $newTableName) {
|
|
$this->query("EXEC sp_rename \"$oldTableName\", \"$newTableName\"");
|
|
}
|
|
|
|
/**
|
|
* Checks a table's integrity and repairs it if necessary.
|
|
* NOTE: MSSQL does not appear to support any vacuum or optimise commands
|
|
*
|
|
* @var string $tableName The name of the table.
|
|
* @return boolean Return true if the table has integrity after the method is complete.
|
|
*/
|
|
public function checkAndRepairTable($tableName) {
|
|
return true;
|
|
}
|
|
|
|
public function createField($tableName, $fieldName, $fieldSpec) {
|
|
$this->query("ALTER TABLE \"$tableName\" ADD \"$fieldName\" $fieldSpec");
|
|
}
|
|
|
|
/**
|
|
* Change the database type of the given field.
|
|
* @param string $tableName The name of the tbale the field is in.
|
|
* @param string $fieldName The name of the field to change.
|
|
* @param string $fieldSpec The new field specification
|
|
*/
|
|
public function alterField($tableName, $fieldName, $fieldSpec) {
|
|
$this->query("ALTER TABLE \"$tableName\" CHANGE \"$fieldName\" \"$fieldName\" $fieldSpec");
|
|
}
|
|
|
|
/**
|
|
* Change the database column name of the given field.
|
|
*
|
|
* @param string $tableName The name of the tbale the field is in.
|
|
* @param string $oldName The name of the field to change.
|
|
* @param string $newName The new name of the field
|
|
*/
|
|
public function renameField($tableName, $oldName, $newName) {
|
|
$fieldList = $this->fieldList($tableName);
|
|
if(array_key_exists($oldName, $fieldList)) {
|
|
$this->query("EXEC sp_rename @objname = '$tableName.$oldName', @newname = '$newName', @objtype = 'COLUMN'");
|
|
}
|
|
}
|
|
|
|
public function fieldList($table) {
|
|
//This gets us more information than we need, but I've included it all for the moment....
|
|
$fieldRecords = $this->query("SELECT ordinal_position, column_name, data_type, column_default,
|
|
is_nullable, character_maximum_length, numeric_precision, numeric_scale, collation_name
|
|
FROM information_schema.columns WHERE table_name = '$table'
|
|
ORDER BY ordinal_position;");
|
|
|
|
// Cache the records from the query - otherwise a lack of multiple active result sets
|
|
// will cause subsequent queries to fail in this method
|
|
$fields = array();
|
|
$output = array();
|
|
foreach($fieldRecords as $record) {
|
|
$fields[] = $record;
|
|
}
|
|
|
|
foreach($fields as $field) {
|
|
// Update the data_type field to be a complete column definition string for use by
|
|
// SS_Database::requireField()
|
|
switch($field['data_type']){
|
|
case 'bigint':
|
|
case 'numeric':
|
|
case 'float':
|
|
case 'bit':
|
|
if($field['data_type'] != 'bigint' && $sizeSuffix = $field['numeric_precision']) {
|
|
$field['data_type'] .= "($sizeSuffix)";
|
|
}
|
|
|
|
if($field['is_nullable'] == 'YES') {
|
|
$field['data_type'] .= ' null';
|
|
} else {
|
|
$field['data_type'] .= ' not null';
|
|
}
|
|
if($field['column_default']) {
|
|
$default=substr($field['column_default'], 2, -2);
|
|
$field['data_type'] .= " default $default";
|
|
}
|
|
break;
|
|
|
|
case 'decimal':
|
|
if($field['numeric_precision']) {
|
|
$sizeSuffix = $field['numeric_precision'] . ',' . $field['numeric_scale'];
|
|
$field['data_type'] .= "($sizeSuffix)";
|
|
}
|
|
|
|
if($field['is_nullable'] == 'YES') {
|
|
$field['data_type'] .= ' null';
|
|
} else {
|
|
$field['data_type'] .= ' not null';
|
|
}
|
|
if($field['column_default']) {
|
|
$default=substr($field['column_default'], 2, -2);
|
|
$field['data_type'] .= " default $default";
|
|
}
|
|
break;
|
|
|
|
case 'nvarchar':
|
|
case 'varchar':
|
|
//Check to see if there's a constraint attached to this column:
|
|
$constraint=$this->ColumnConstraints($table, $field['column_name']);
|
|
if($constraint){
|
|
$constraints=$this->EnumValuesFromConstraint($constraint['CHECK_CLAUSE']);
|
|
$default=substr($field['column_default'], 2, -2);
|
|
$field['data_type']=$this->enum(Array('default'=>$default, 'name'=>$field['column_name'], 'enums'=>$constraints, 'table'=>$table));
|
|
break;
|
|
}
|
|
|
|
default:
|
|
$sizeSuffix = $field['character_maximum_length'];
|
|
if($sizeSuffix == '-1') $sizeSuffix = 'max';
|
|
if($sizeSuffix) {
|
|
$field['data_type'] .= "($sizeSuffix)";
|
|
}
|
|
|
|
if($field['is_nullable'] == 'YES') {
|
|
$field['data_type'] .= ' null';
|
|
} else {
|
|
$field['data_type'] .= ' not null';
|
|
}
|
|
if($field['column_default']) {
|
|
$default=substr($field['column_default'], 2, -2);
|
|
$field['data_type'] .= " default '$default'";
|
|
}
|
|
}
|
|
$output[$field['column_name']]=$field;
|
|
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Create an index on a table.
|
|
* @param string $tableName The name of the table.
|
|
* @param string $indexName The name of the index.
|
|
* @param string $indexSpec The specification of the index, see SS_Database::requireIndex() for more details.
|
|
*/
|
|
public function createIndex($tableName, $indexName, $indexSpec) {
|
|
$this->query($this->getIndexSqlDefinition($tableName, $indexName, $indexSpec));
|
|
}
|
|
|
|
/**
|
|
* This takes the index spec which has been provided by a class (ie static $indexes = blah blah)
|
|
* and turns it into a proper string.
|
|
* Some indexes may be arrays, such as fulltext and unique indexes, and this allows database-specific
|
|
* arrays to be created.
|
|
*/
|
|
public function convertIndexSpec($indexSpec){
|
|
if(is_array($indexSpec)){
|
|
//Here we create a db-specific version of whatever index we need to create.
|
|
switch($indexSpec['type']){
|
|
case 'fulltext':
|
|
$indexSpec='fulltext (' . str_replace(' ', '', $indexSpec['value']) . ')';
|
|
break;
|
|
case 'unique':
|
|
$indexSpec='unique (' . $indexSpec['value'] . ')';
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $indexSpec;
|
|
}
|
|
|
|
/**
|
|
* Return SQL for dropping and recreating an index
|
|
*/
|
|
protected function getIndexSqlDefinition($tableName, $indexName, $indexSpec) {
|
|
$index = 'ix_' . $tableName . '_' . $indexName;
|
|
$drop = "IF EXISTS (SELECT name FROM sys.indexes WHERE name = '$index') DROP INDEX $index ON \"" . $tableName . "\";";
|
|
|
|
if(!is_array($indexSpec)) {
|
|
$indexSpec=trim($indexSpec, '()');
|
|
$bits=explode(',', $indexSpec);
|
|
$indexes="\"" . implode("\",\"", $bits) . "\"";
|
|
|
|
return "$drop CREATE INDEX $index ON \"" . $tableName . "\" (" . $indexes . ");";
|
|
} else {
|
|
//create a type-specific index
|
|
if($indexSpec['type'] == 'fulltext') {
|
|
if($this->fullTextEnabled()) {
|
|
//Enable full text search.
|
|
$this->createFullTextCatalog();
|
|
$primary_key = $this->getPrimaryKey($tableName);
|
|
|
|
$query = '';
|
|
if($this->fullTextIndexExists($tableName)) {
|
|
$query .= "\nDROP FULLTEXT INDEX ON \"$tableName\";";
|
|
}
|
|
$query .= "CREATE FULLTEXT INDEX ON \"$tableName\" ({$indexSpec['value']}) KEY INDEX $primary_key WITH CHANGE_TRACKING AUTO;";
|
|
return $query;
|
|
}
|
|
}
|
|
|
|
if($indexSpec['type'] == 'unique') {
|
|
if(!is_array($indexSpec['value'])) $columns = preg_split('/ *, */', trim($indexSpec['value']));
|
|
else $columns = $indexSpec['value'];
|
|
$SQL_columnList = '"' . implode('", "', $columns) . '"';
|
|
|
|
return "$drop CREATE UNIQUE INDEX $index ON \"" . $tableName . "\" ($SQL_columnList);";
|
|
}
|
|
}
|
|
}
|
|
|
|
function getDbSqlDefinition($tableName, $indexName, $indexSpec){
|
|
return $indexName;
|
|
}
|
|
|
|
/**
|
|
* Alter an index on a table.
|
|
* @param string $tableName The name of the table.
|
|
* @param string $indexName The name of the index.
|
|
* @param string $indexSpec The specification of the index, see SS_Database::requireIndex() for more details.
|
|
*/
|
|
public function alterIndex($tableName, $indexName, $indexSpec) {
|
|
$indexSpec = trim($indexSpec);
|
|
if($indexSpec[0] != '(') {
|
|
list($indexType, $indexFields) = explode(' ',$indexSpec,2);
|
|
} else {
|
|
$indexFields = $indexSpec;
|
|
}
|
|
|
|
if(!$indexType) {
|
|
$indexType = "index";
|
|
}
|
|
|
|
$this->query("DROP INDEX $indexName ON $tableName;");
|
|
$this->query("ALTER TABLE \"$tableName\" ADD $indexType \"$indexName\" $indexFields");
|
|
}
|
|
|
|
/**
|
|
* Return the list of indexes in a table.
|
|
* @param string $table The table name.
|
|
* @return array
|
|
*/
|
|
public function indexList($table) {
|
|
$indexes = DB::query("EXEC sp_helpindex '$table';");
|
|
$prefix = '';
|
|
$indexList = array();
|
|
|
|
foreach($indexes as $index) {
|
|
if(strpos($index['index_description'], 'unique') !== false) {
|
|
$prefix='unique ';
|
|
}
|
|
|
|
$key = str_replace(', ', ',', $index['index_keys']);
|
|
$indexList[$key]['indexname'] = $index['index_name'];
|
|
$indexList[$key]['spec'] = $prefix . '(' . $key . ')';
|
|
}
|
|
|
|
// Now we need to check to see if we have any fulltext indexes attached to this table:
|
|
if($this->fullTextEnabled()) {
|
|
$result = DB::query('EXEC sp_help_fulltext_columns;');
|
|
$columns = '';
|
|
foreach($result as $row) {
|
|
if($row['TABLE_NAME'] == $table) {
|
|
$columns .= $row['FULLTEXT_COLUMN_NAME'] . ',';
|
|
}
|
|
}
|
|
|
|
if($columns!=''){
|
|
$columns=trim($columns, ',');
|
|
$indexList['SearchFields']['indexname'] = 'SearchFields';
|
|
$indexList['SearchFields']['spec'] = 'fulltext (' . $columns . ')';
|
|
}
|
|
}
|
|
|
|
return $indexList;
|
|
}
|
|
|
|
/**
|
|
* Returns a list of all the tables in the database.
|
|
* Table names will all be in lowercase.
|
|
* @return array
|
|
*/
|
|
public function tableList() {
|
|
$tables = array();
|
|
foreach($this->query("EXEC sp_tables @table_owner = 'dbo';") as $record) {
|
|
$table = strtolower($record['TABLE_NAME']);
|
|
$tables[$table] = $table;
|
|
}
|
|
return $tables;
|
|
}
|
|
|
|
/**
|
|
* Empty the given table of call contentTR
|
|
*/
|
|
public function clearTable($table) {
|
|
$this->query("TRUNCATE TABLE \"$table\"");
|
|
}
|
|
|
|
/**
|
|
* Return the number of rows affected by the previous operation.
|
|
* @return int
|
|
*/
|
|
public function affectedRows() {
|
|
if($this->mssql) {
|
|
return mssql_rows_affected($this->dbConn);
|
|
} else {
|
|
return $this->lastAffectedRows;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a boolean type-formatted string
|
|
* We use 'bit' so that we can do numeric-based comparisons
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function boolean($values) {
|
|
//Annoyingly, we need to do a good ol' fashioned switch here:
|
|
($values['default']) ? $default='1' : $default='0';
|
|
return 'bit not null default ' . $default;
|
|
}
|
|
|
|
/**
|
|
* Return a date type-formatted string.
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function date($values) {
|
|
return 'datetime null';
|
|
}
|
|
|
|
/**
|
|
* Return a decimal type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function decimal($values) {
|
|
// Avoid empty strings being put in the db
|
|
if($values['precision'] == '') {
|
|
$precision = 1;
|
|
} else {
|
|
$precision = $values['precision'];
|
|
}
|
|
|
|
$defaultValue = '0';
|
|
if(isset($values['default']) && is_numeric($values['default'])) {
|
|
$defaultValue = $values['default'];
|
|
}
|
|
|
|
return 'decimal(' . $precision . ') not null default ' . $defaultValue;
|
|
}
|
|
|
|
/**
|
|
* Return a enum type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function enum($values) {
|
|
// Enums are a bit different. We'll be creating a varchar(255) with a constraint of all the
|
|
// usual enum options.
|
|
// NOTE: In this one instance, we are including the table name in the values array
|
|
|
|
$maxLength = max(array_map('strlen', $values['enums']));
|
|
|
|
return "varchar($maxLength) not null default '" . $values['default']
|
|
. "' check(\"" . $values['name'] . "\" in ('" . implode("','", $values['enums'])
|
|
. "'))";
|
|
}
|
|
|
|
/**
|
|
* @todo Make this work like {@link MySQLDatabase::set()}
|
|
*/
|
|
public function set($values) {
|
|
return $this->enum($values);
|
|
}
|
|
|
|
/**
|
|
* Return a float type-formatted string.
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function float($values) {
|
|
return 'float not null default ' . $values['default'];
|
|
}
|
|
|
|
/**
|
|
* Return a int type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function int($values) {
|
|
//We'll be using an 8 digit precision to keep it in line with the serial8 datatype for ID columns
|
|
return 'numeric(8) not null default ' . (int) $values['default'];
|
|
}
|
|
|
|
/**
|
|
* Return a datetime type-formatted string
|
|
* For MS SQL, we simply return the word 'timestamp', no other parameters are necessary
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function ss_datetime($values) {
|
|
return 'datetime null';
|
|
}
|
|
|
|
/**
|
|
* Return a text type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function text($values) {
|
|
$collation = self::$collation ? " COLLATE " . self::$collation : "";
|
|
return "nvarchar(max)$collation null";
|
|
}
|
|
|
|
/**
|
|
* Return a time type-formatted string.
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function time($values){
|
|
return 'time null';
|
|
}
|
|
|
|
/**
|
|
* Return a varchar type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function varchar($values) {
|
|
$collation = self::$collation ? " COLLATE " . self::$collation : "";
|
|
return "nvarchar(" . $values['precision'] . ")$collation null";
|
|
}
|
|
|
|
/**
|
|
* Return a 4 digit numeric type.
|
|
* @return string
|
|
*/
|
|
public function year($values) {
|
|
return 'numeric(4)';
|
|
}
|
|
|
|
/**
|
|
* This returns the column which is the primary key for each table
|
|
* In Postgres, it is a SERIAL8, which is the equivalent of an auto_increment
|
|
*
|
|
* @return string
|
|
*/
|
|
function IdColumn($asDbValue=false, $hasAutoIncPK=true){
|
|
if($asDbValue)
|
|
return 'bigint not null';
|
|
else {
|
|
if($hasAutoIncPK)
|
|
return 'bigint identity(1,1)';
|
|
else return 'bigint not null';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the SQL command to get all the tables in this database
|
|
*/
|
|
function allTablesSQL(){
|
|
return "SELECT \"name\" FROM \"sys\".\"tables\";";
|
|
}
|
|
|
|
/**
|
|
* Returns true if this table exists
|
|
* @todo Make a proper implementation
|
|
*/
|
|
function hasTable($tableName) {
|
|
$SQL_tableName = Convert::raw2sql($tableName);
|
|
$value = DB::query("SELECT table_name FROM information_schema.tables WHERE table_name = '$SQL_tableName'")->value();
|
|
return (bool)$value;
|
|
}
|
|
|
|
/**
|
|
* Returns the values of the given enum field
|
|
* NOTE: Experimental; introduced for db-abstraction and may changed before 2.4 is released.
|
|
*/
|
|
public function enumValuesForField($tableName, $fieldName) {
|
|
// Get the enum of all page types from the SiteTree table
|
|
|
|
$constraints=$this->ColumnConstraints($tableName, $fieldName);
|
|
$classes=Array();
|
|
if($constraints){
|
|
$constraints=$this->EnumValuesFromConstraint($constraints['CHECK_CLAUSE']);
|
|
$classes=$constraints;
|
|
}
|
|
return $classes;
|
|
}
|
|
|
|
/**
|
|
* SQL Server uses CURRENT_TIMESTAMP for the current date/time.
|
|
*/
|
|
function now() {
|
|
return 'CURRENT_TIMESTAMP';
|
|
}
|
|
|
|
/**
|
|
* Returns the database-specific version of the random() function
|
|
*/
|
|
function random(){
|
|
return 'RAND()';
|
|
}
|
|
|
|
/**
|
|
* This is a lookup table for data types.
|
|
*
|
|
* For instance, MSSQL uses 'BIGINT', while MySQL uses 'UNSIGNED'
|
|
* and PostgreSQL uses 'INT'.
|
|
*/
|
|
function dbDataType($type){
|
|
$values = array(
|
|
'unsigned integer'=>'BIGINT'
|
|
);
|
|
if(isset($values[$type])) return $values[$type];
|
|
else return '';
|
|
}
|
|
|
|
/**
|
|
* Convert a SQLQuery object into a SQL statement.
|
|
*/
|
|
public function sqlQueryToString(SQLQuery $sqlQuery) {
|
|
if (!$sqlQuery->from) return '';
|
|
|
|
if($sqlQuery->orderby && strtoupper(trim($sqlQuery->orderby)) == 'RAND()') $sqlQuery->orderby = "NEWID()";
|
|
|
|
//Get the limit and offset
|
|
$limit='';
|
|
$offset='0';
|
|
if(is_array($sqlQuery->limit)){
|
|
$limit=$sqlQuery->limit['limit'];
|
|
if(isset($sqlQuery->limit['start']))
|
|
$offset=$sqlQuery->limit['start'];
|
|
|
|
} else if(preg_match('/^([0-9]+) offset ([0-9]+)$/i', trim($sqlQuery->limit), $matches)) {
|
|
$limit = $matches[1];
|
|
$offset = $matches[2];
|
|
} else {
|
|
//could be a comma delimited string
|
|
$bits=explode(',', $sqlQuery->limit);
|
|
if(sizeof($bits) > 1) {
|
|
list($offset, $limit) = $bits;
|
|
} else {
|
|
$limit = $bits[0];
|
|
}
|
|
}
|
|
|
|
$text = '';
|
|
$suffixText = '';
|
|
$nestedQuery = false;
|
|
|
|
// DELETE queries
|
|
if($sqlQuery->delete) {
|
|
$text = 'DELETE ';
|
|
|
|
// SELECT queries
|
|
} else {
|
|
$distinct = $sqlQuery->distinct ? "DISTINCT " : "";
|
|
|
|
// If there's a limit but no offset, just use 'TOP X'
|
|
// rather than the more complex sub-select method
|
|
if ($limit != 0 && $offset == 0) {
|
|
$text = "SELECT $distinct TOP $limit";
|
|
|
|
// If there's a limit and an offset, then we need to do a subselect
|
|
} else if($limit && $offset) {
|
|
if($sqlQuery->orderby) {
|
|
$rowNumber = "ROW_NUMBER() OVER (ORDER BY $sqlQuery->orderby) AS Number";
|
|
} else {
|
|
$firstCol = reset($sqlQuery->select);
|
|
$rowNumber = "ROW_NUMBER() OVER (ORDER BY $firstCol) AS Number";
|
|
}
|
|
$text = "SELECT * FROM ( SELECT $distinct$rowNumber, ";
|
|
$suffixText .= ") AS Numbered WHERE Number BETWEEN " . ($offset+1) ." AND " . ($offset+$limit)
|
|
. " ORDER BY Number";
|
|
$nestedQuery = true;
|
|
|
|
// Otherwise a simple query
|
|
} else {
|
|
$text = "SELECT $distinct";
|
|
}
|
|
|
|
// Now add the columns to be selected
|
|
$text .= implode(", ", $sqlQuery->select);
|
|
}
|
|
|
|
$text .= " FROM " . implode(" ", $sqlQuery->from);
|
|
if($sqlQuery->where) $text .= " WHERE (" . $sqlQuery->getFilter(). ")";
|
|
if($sqlQuery->groupby) $text .= " GROUP BY " . implode(", ", $sqlQuery->groupby);
|
|
if($sqlQuery->having) $text .= " HAVING ( " . implode(" ) AND ( ", $sqlQuery->having) . " )";
|
|
if(!$nestedQuery && $sqlQuery->orderby) $text .= " ORDER BY " . $sqlQuery->orderby;
|
|
|
|
// $suffixText is used by the nested queries to create an offset limit
|
|
if($suffixText) $text .= $suffixText;
|
|
|
|
return $text;
|
|
}
|
|
|
|
/*
|
|
* This will return text which has been escaped in a database-friendly manner
|
|
* Using PHP's addslashes method won't work in MSSQL
|
|
*/
|
|
function addslashes($value){
|
|
$value=stripslashes($value);
|
|
$value=str_replace("'","''",$value);
|
|
$value=str_replace("\0","[NULL]",$value);
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* This changes the index name depending on database requirements.
|
|
* MSSQL requires underscores to be replaced with commas.
|
|
*/
|
|
function modifyIndex($index) {
|
|
return str_replace('_', ',', $index);
|
|
}
|
|
|
|
/**
|
|
* The core search engine configuration.
|
|
* @todo There is no result relevancy or ordering as it currently stands.
|
|
*
|
|
* @param string $keywords Keywords as a space separated string
|
|
* @return object DataObjectSet of result pages
|
|
*/
|
|
public function searchEngine($classesToSearch, $keywords, $start, $pageLength, $sortBy = "Relevance DESC", $extraFilter = "", $booleanSearch = false, $alternativeFileFilter = "", $invertedMatch = false) {
|
|
$results = new DataObjectSet();
|
|
if(!$this->fullTextEnabled()) {
|
|
return $results;
|
|
}
|
|
|
|
// Strip unfriendly characters, SQLServer "CONTAINS" predicate will crash on & and | and ignore others anyway.
|
|
if (function_exists('mb_ereg_replace')) {
|
|
$keywords = mb_ereg_replace('[^\w\s]', '', trim($keywords));
|
|
}
|
|
else {
|
|
$keywords = str_replace(array('&','|','!'), '', Convert::raw2sql(trim($keywords)));
|
|
}
|
|
|
|
// Concat with ANDs
|
|
$keywords = explode(' ', $keywords);
|
|
$keywords = implode(' AND ', $keywords);
|
|
|
|
//Get a list of all the tables and columns we'll be searching on:
|
|
$result = DB::query('EXEC sp_help_fulltext_columns');
|
|
$tables = array();
|
|
|
|
foreach($result as $row){
|
|
if(substr($row['TABLE_NAME'], -5)!='_Live' && substr($row['TABLE_NAME'], -9)!='_versions') {
|
|
$thisSql = "SELECT \"ID\", '{$row['TABLE_NAME']}' AS Source FROM \"{$row['TABLE_NAME']}\" WHERE (".
|
|
"CONTAINS(\"{$row['FULLTEXT_COLUMN_NAME']}\", '$keywords')";
|
|
if(strpos($row['TABLE_NAME'], 'SiteTree') === 0) {
|
|
$thisSql .= " AND ShowInSearch != 0)";//" OR (Title LIKE '%$keywords%' OR Title LIKE '%$htmlEntityKeywords%')";
|
|
} else {
|
|
$thisSql .= ')';
|
|
}
|
|
|
|
$tables[] = $thisSql;
|
|
}
|
|
}
|
|
|
|
$query = implode(' UNION ', $tables);
|
|
$result = DB::query($query);
|
|
|
|
$totalCount = 0;
|
|
foreach($result as $row) {
|
|
$record = DataObject::get_by_id($row['Source'], $row['ID']);
|
|
if($record->canView()) {
|
|
$results->push($record);
|
|
$totalCount++;
|
|
}
|
|
}
|
|
|
|
$results->setPageLimits($start, $pageLength, $totalCount);
|
|
|
|
return $results;
|
|
}
|
|
|
|
/**
|
|
* Allow auto-increment primary key editing on the given table.
|
|
* Some databases need to enable this specially.
|
|
* @param $table The name of the table to have PK editing allowed on
|
|
* @param $allow True to start, false to finish
|
|
*/
|
|
function allowPrimaryKeyEditing($table, $allow = true) {
|
|
$this->query("SET IDENTITY_INSERT \"$table\" " . ($allow ? "ON" : "OFF"));
|
|
}
|
|
|
|
/**
|
|
* Check if a fulltext index exists on a particular table name.
|
|
* @return boolean TRUE index exists | FALSE index does not exist | NULL no support
|
|
*/
|
|
function fulltextIndexExists($tableName) {
|
|
// Special case for no full text index support
|
|
if(!$this->fullTextEnabled()) return null;
|
|
return (bool) $this->query("
|
|
SELECT 1 FROM sys.fulltext_indexes i
|
|
JOIN sys.objects o ON i.object_id = o.object_id
|
|
WHERE o.name = '$tableName'
|
|
")->value();
|
|
}
|
|
|
|
/**
|
|
* Returns a SQL fragment for querying a fulltext search index
|
|
* @param $fields array The list of field names to search on
|
|
* @param $keywords string The search query
|
|
* @param $booleanSearch A MySQL-specific flag to switch to boolean search
|
|
*/
|
|
function fullTextSearchSQL($fields, $keywords, $booleanSearch = false) {
|
|
$fieldNames = '"' . implode('", "', $fields) . '"';
|
|
|
|
$SQL_keywords = Convert::raw2sql($keywords);
|
|
|
|
return "FREETEXT (($fieldNames), '$SQL_keywords')";
|
|
}
|
|
|
|
/**
|
|
* Remove noise words that would kill a MSSQL full-text query
|
|
*
|
|
* @param string $keywords
|
|
* @return string $keywords with noise words removed
|
|
* @author Tom Rix
|
|
*/
|
|
static public function removeNoiseWords($keywords) {
|
|
$goodWords = array();
|
|
foreach (explode(' ', $keywords) as $word) {
|
|
// @todo we may want to remove +'s -'s etc too
|
|
if (!in_array($word, self::$noiseWords)) {
|
|
$goodWords[] = $word;
|
|
}
|
|
}
|
|
return join(' ', $goodWords);
|
|
}
|
|
|
|
/*
|
|
* Does this database support transactions?
|
|
*/
|
|
public function supportsTransactions(){
|
|
return $this->supportsTransactions;
|
|
}
|
|
|
|
/*
|
|
* This is a quick lookup to discover if the database supports particular extensions
|
|
* Currently, MSSQL supports no extensions
|
|
*/
|
|
public function supportsExtensions($extensions=Array('partitions', 'tablespaces', 'clustering')){
|
|
if(isset($extensions['partitions']))
|
|
return false;
|
|
elseif(isset($extensions['tablespaces']))
|
|
return false;
|
|
elseif(isset($extensions['clustering']))
|
|
return false;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Start a prepared transaction
|
|
* See http://developer.postgresql.org/pgdocs/postgres/sql-set-transaction.html for details on transaction isolation options
|
|
*/
|
|
public function startTransaction($transaction_mode=false, $session_characteristics=false){
|
|
DB::query('BEGIN TRANSACTION');
|
|
}
|
|
|
|
/*
|
|
* Create a savepoint that you can jump back to if you encounter problems
|
|
*/
|
|
public function transactionSavepoint($savepoint){
|
|
DB::query("SAVE TRANSACTION \"$savepoint\"");
|
|
}
|
|
|
|
/*
|
|
* Rollback or revert to a savepoint if your queries encounter problems
|
|
* If you encounter a problem at any point during a transaction, you may
|
|
* need to rollback that particular query, or return to a savepoint
|
|
*/
|
|
public function transactionRollback($savepoint=false){
|
|
|
|
if($savepoint) {
|
|
DB::query("ROLLBACK TRANSACTION \"$savepoint\"");
|
|
} else {
|
|
DB::query('ROLLBACK TRANSACTION');
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Commit everything inside this transaction so far
|
|
*/
|
|
public function endTransaction(){
|
|
DB::query('COMMIT TRANSACTION');
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression for MSSQL
|
|
* used for querying a datetime in a certain format
|
|
* @param string $date to be formated, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
|
|
* @param string $format to be used, supported specifiers:
|
|
* %Y = Year (four digits)
|
|
* %m = Month (01..12)
|
|
* %d = Day (01..31)
|
|
* %H = Hour (00..23)
|
|
* %i = Minutes (00..59)
|
|
* %s = Seconds (00..59)
|
|
* %U = unix timestamp, can only be used on it's own
|
|
* @return string SQL datetime expression to query for a formatted datetime
|
|
*/
|
|
function formattedDatetimeClause($date, $format) {
|
|
preg_match_all('/%(.)/', $format, $matches);
|
|
foreach($matches[1] as $match) if(array_search($match, array('Y','m','d','H','i','s','U')) === false) user_error('formattedDatetimeClause(): unsupported format character %' . $match, E_USER_WARNING);
|
|
|
|
if(preg_match('/^now$/i', $date)) {
|
|
$date = "CURRENT_TIMESTAMP";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date)) {
|
|
$date = "'$date.000'";
|
|
}
|
|
|
|
if($format == '%U') return "DATEDIFF(s, '19700101 12:00:00:000', $date)";
|
|
|
|
$trans = array(
|
|
'Y' => 'yy',
|
|
'm' => 'mm',
|
|
'd' => 'dd',
|
|
'H' => 'hh',
|
|
'i' => 'mi',
|
|
's' => 'ss',
|
|
);
|
|
|
|
$strings = array();
|
|
$buffer = $format;
|
|
while(strlen($buffer)) {
|
|
if(substr($buffer,0,1) == '%') {
|
|
$f = substr($buffer,1,1);
|
|
$flen = $f == 'Y' ? 4 : 2;
|
|
$strings[] = "RIGHT('0' + CAST(DATEPART({$trans[$f]},$date) AS VARCHAR), $flen)";
|
|
$buffer = substr($buffer, 2);
|
|
} else {
|
|
$pos = strpos($buffer, '%');
|
|
if($pos === false) {
|
|
$strings[] = $buffer;
|
|
$buffer = '';
|
|
} else {
|
|
$strings[] = "'".substr($buffer, 0, $pos)."'";
|
|
$buffer = substr($buffer, $pos);
|
|
}
|
|
}
|
|
}
|
|
|
|
return '(' . implode(' + ', $strings) . ')';
|
|
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression for MSSQL.
|
|
* used for querying a datetime addition
|
|
* @param string $date, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
|
|
* @param string $interval to be added, use the format [sign][integer] [qualifier], e.g. -1 Day, +15 minutes, +1 YEAR
|
|
* supported qualifiers:
|
|
* - years
|
|
* - months
|
|
* - days
|
|
* - hours
|
|
* - minutes
|
|
* - seconds
|
|
* This includes the singular forms as well
|
|
* @return string SQL datetime expression to query for a datetime (YYYY-MM-DD hh:mm:ss) which is the result of the addition
|
|
*/
|
|
function datetimeIntervalClause($date, $interval) {
|
|
$trans = array(
|
|
'year' => 'yy',
|
|
'month' => 'mm',
|
|
'day' => 'dd',
|
|
'hour' => 'hh',
|
|
'minute' => 'mi',
|
|
'second' => 'ss',
|
|
);
|
|
|
|
$singularinterval = preg_replace('/(year|month|day|hour|minute|second)s/i', '$1', $interval);
|
|
|
|
if(
|
|
!($params = preg_match('/([-+]\d+) (\w+)/i', $singularinterval, $matches)) ||
|
|
!isset($trans[strtolower($matches[2])])
|
|
) user_error('datetimeIntervalClause(): invalid interval ' . $interval, E_USER_WARNING);
|
|
|
|
if(preg_match('/^now$/i', $date)) {
|
|
$date = "CURRENT_TIMESTAMP";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date)) {
|
|
$date = "'$date'";
|
|
}
|
|
|
|
return "CONVERT(VARCHAR, DATEADD(" . $trans[strtolower($matches[2])] . ", " . (int)$matches[1] . ", $date), 120)";
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression for MSSQL.
|
|
* used for querying a datetime substraction
|
|
* @param string $date1, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
|
|
* @param string $date2 to be substracted of $date1, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
|
|
* @return string SQL datetime expression to query for the interval between $date1 and $date2 in seconds which is the result of the substraction
|
|
*/
|
|
function datetimeDifferenceClause($date1, $date2) {
|
|
|
|
if(preg_match('/^now$/i', $date1)) {
|
|
$date1 = "CURRENT_TIMESTAMP";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date1)) {
|
|
$date1 = "'$date1'";
|
|
}
|
|
|
|
if(preg_match('/^now$/i', $date2)) {
|
|
$date2 = "CURRENT_TIMESTAMP";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date2)) {
|
|
$date2 = "'$date2'";
|
|
}
|
|
|
|
return "DATEDIFF(s, $date2, $date1)";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A result-set from a MSSQL database.
|
|
* @package sapphire
|
|
* @subpackage model
|
|
*/
|
|
class MSSQLQuery extends SS_Query {
|
|
|
|
/**
|
|
* The MSSQLDatabase object that created this result set.
|
|
* @var MSSQLDatabase
|
|
*/
|
|
private $database;
|
|
|
|
/**
|
|
* The internal MSSQL handle that points to the result set.
|
|
* @var resource
|
|
*/
|
|
private $handle;
|
|
|
|
/**
|
|
* If true, use the mssql_... functions.
|
|
* If false use the sqlsrv_... functions
|
|
*/
|
|
private $mssql = null;
|
|
|
|
/**
|
|
* Hook the result-set given into a Query class, suitable for use by sapphire.
|
|
* @param database The database object that created this query.
|
|
* @param handle the internal mssql handle that is points to the resultset.
|
|
*/
|
|
public function __construct(MSSQLDatabase $database, $handle, $mssql) {
|
|
$this->database = $database;
|
|
$this->handle = $handle;
|
|
$this->mssql = $mssql;
|
|
}
|
|
|
|
public function __destroy() {
|
|
if($this->mssql) {
|
|
mssql_free_result($this->handle);
|
|
} else {
|
|
sqlsrv_free_stmt($this->handle);
|
|
}
|
|
}
|
|
|
|
public function seek($row) {
|
|
if($this->mssql) {
|
|
return mssql_data_seek($this->handle, $row);
|
|
} else {
|
|
user_error("MSSQLQuery::seek() sqlsrv doesn't support seek.", E_USER_WARNING);
|
|
}
|
|
}
|
|
|
|
public function numRecords() {
|
|
if(!is_resource($this->handle)) return false;
|
|
if($this->mssql) {
|
|
return mssql_num_rows($this->handle);
|
|
} else {
|
|
// WARNING: This will only work if the cursor type is NOT forward only!
|
|
if(function_exists('sqlsrv_num_rows')) {
|
|
return sqlsrv_num_rows($this->handle);
|
|
}
|
|
}
|
|
}
|
|
|
|
public function nextRecord() {
|
|
|
|
if(!is_resource($this->handle)) return false;
|
|
|
|
// Coalesce rather than replace common fields.
|
|
$output = array();
|
|
|
|
if($this->mssql) {
|
|
if($data = mssql_fetch_row($this->handle)) {
|
|
foreach($data as $columnIdx => $value) {
|
|
$columnName = mssql_field_name($this->handle, $columnIdx);
|
|
// There are many places in the framework that expect the ID to be a string, not a double
|
|
// Do not set this to an integer, or it will cause failures in many tests that expect a string
|
|
if($columnName == 'ID') $value = (string) $value;
|
|
// $value || !$ouput[$columnName] means that the *last* occurring value is shown
|
|
// !$ouput[$columnName] means that the *first* occurring value is shown
|
|
if(isset($value) || !isset($output[$columnName])) {
|
|
$output[$columnName] = $value;
|
|
}
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
} else {
|
|
if($this->handle && $data = sqlsrv_fetch_array($this->handle, SQLSRV_FETCH_NUMERIC)) {
|
|
$fields = sqlsrv_field_metadata($this->handle);
|
|
foreach($fields as $columnIdx => $field) {
|
|
$value = $data[$columnIdx];
|
|
if($value instanceof DateTime) $value = $value->format('Y-m-d H:i:s');
|
|
|
|
// $value || !$ouput[$columnName] means that the *last* occurring value is shown
|
|
// !$ouput[$columnName] means that the *first* occurring value is shown
|
|
if(isset($value) || !isset($output[$field['Name']])) {
|
|
$output[$field['Name']] = $value;
|
|
}
|
|
}
|
|
|
|
return $output;
|
|
} else {
|
|
// Free the handle if there are no more results - sqlsrv crashes if there are too many handles
|
|
if($this->handle) {
|
|
sqlsrv_free_stmt($this->handle);
|
|
$this->handle = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
} |