mirror of
https://github.com/silverstripe/silverstripe-mssql
synced 2024-10-22 08:05:53 +02:00
1512 lines
46 KiB
PHP
1512 lines
46 KiB
PHP
<?php
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/**
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* Microsoft SQL Server connector class.
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*
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* @package sapphire
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* @subpackage model
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*/
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class MSSQLDatabase extends 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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private $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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private $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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private $database;
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/**
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* Does this database have full-text index supprt
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*/
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protected $fullTextEnabled = true;
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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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private $mssql = null;
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/**
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* Sorts the last query's affected row count, for sqlsrv module only.
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* @todo This is a bit clumsy; affectedRows() should be moved to {@link Query} object, so that this isn't necessary.
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*/
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private $lastAffectedRows;
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/**
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* The version of MSSQL
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* @var float
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*/
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private $mssqlVersion;
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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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private $supportsTransactions=false;
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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($this->mssql) {
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$this->dbConn = mssql_connect($parameters['server'], $parameters['username'], $parameters['password'], true);
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} else {
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$this->dbConn = sqlsrv_connect($parameters['server'], array(
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'UID' => $parameters['username'],
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'PWD' => $parameters['password'],
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));
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}
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if(!$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($this->dbConn);
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}
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}
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}
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/**
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* Throw a database error
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*/
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function databaseError($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, $errorLevel);
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}
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/**
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* This will set up the full text search capabilities.
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* Theoretically, you don't need to 'enable' it every time...
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*
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* TODO: make this a _config.php setting
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* TODO: VERY IMPORTANT: move this so it only gets called upon a dev/build action
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*/
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function createFullTextCatalog(){
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if($this->fullTextEnabled) {
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$this->query("exec sp_fulltext_database 'enable';");
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$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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* NOTE: not yet implemented for MSSQL, we just return 2008; the minimum supported version
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* @return float
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*/
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public function getVersion() {
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user_error("getVersion not implemented", E_USER_WARNING);
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return 2008;
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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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$starttime = microtime(true);
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}
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if($this->mssql) {
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$handle = mssql_query($sql, $this->dbConn);
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} else {
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$handle = sqlsrv_query($this->dbConn, $sql);
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}
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if(isset($_REQUEST['showqueries'])) {
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$endtime = round(microtime(true) - $starttime,4);
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Debug::message("\n$sql\n{$endtime}ms\n", false);
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}
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DB::$lastQuery=$handle;
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if(!$handle && $errorLevel) $this->databaseError("Couldn't run query: $sql", $errorLevel);
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if (!$this->mssql) {
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$this->lastAffectedRows = sqlsrv_rows_affected($handle);
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}
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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 = 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'])) $tableName = "#$tableName";
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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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if($newFields) foreach($newFields as $k => $v) $alterList[] .= "ALTER TABLE \"$tableName\" ADD \"$k\" $v";
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$indexList=$this->IndexList($tableName);
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if($alteredFields) {
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foreach($alteredFields as $k => $v) {
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$val=$this->alterTableAlterColumn($tableName, $k, $v, $indexList);
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if($val!='')
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$alterList[] .= $val;
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}
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}
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//DB ABSTRACTION: we need to change the constraints to be a separate 'add' command,
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$alterIndexList=Array();
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if($alteredIndexes) foreach($alteredIndexes as $v) {
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//TODO: I don't think that these drop index commands will work:
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if($v['type']!='fulltext'){
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if(is_array($v))
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$alterIndexList[] = 'DROP INDEX ix_' . strtolower($tableName) . '_' . strtolower($v['value']) . ' ON ' . $tableName . ';';
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else
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$alterIndexList[] = 'DROP INDEX ix_' . strtolower($tableName) . '_' . strtolower(trim($v, '()')) . ' ON ' . $tableName . ';';
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if(is_array($v))
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$k=$v['value'];
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else $k=trim($v, '()');
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$alterIndexList[] = $this->getIndexSqlDefinition($tableName, $k, $v);
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}
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}
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//Add the new indexes:
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if($newIndexes) foreach($newIndexes as $k=>$v){
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$alterIndexList[] = $this->getIndexSqlDefinition($tableName, $k, $v);
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}
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if($alterList) {
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foreach($alterList as $this_alteration){
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if($this_alteration!=''){
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$this->query($this_alteration);
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}
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}
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}
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foreach($alterIndexList as $alteration) {
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if($alteration!='') $this->query($alteration);
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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 $columnName Name of column to check for
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*/
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private function ColumnConstraints($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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private 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 = '$colName'")->value();
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}
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/**
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* Get the actual enum fields from the constraint value:
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*/
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private function EnumValuesFromConstraint($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('/ *= */', $this_segment);
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for($i=1; $i<sizeof($bits); $i+=2)
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array_unshift($constraints, substr(rtrim($bits[$i], ')'), 1, -1));
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}
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return $constraints;
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}
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/*
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* Creates an ALTER expression for a column in MS SQL
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*
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* @param $tableName Name of the table to be altered
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* @param $colName Name of the column to be altered
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* @param $colSpec String which contains conditions for a column
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* @return string
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*/
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private function alterTableAlterColumn($tableName, $colName, $colSpec, $indexList){
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// First, we split the column specifications into parts
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// TODO: this returns an empty array for the following string: int(11) not null auto_increment
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// on second thoughts, why is an auto_increment field being passed through?
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$pattern = '/^([\w()]+)\s?((?:not\s)?null)?\s?(default\s[\w\']+)?\s?(check\s?[\w()\'",\s]+)?$/i';
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$matches=Array();
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preg_match($pattern, $colSpec, $matches);
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//if($matches[1]=='serial8')
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// return '';
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//drop the index if it exists:
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$alterCol='';
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if(isset($indexList[$colName]) && $colName!='ID'){
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//$alterCol = "\nDROP INDEX \"$tableName\".ix_{$tableName}_{$colName};";
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//The indexname value should hold the name of the index, so we don't have to construct it outselves.
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//This also means we can use internal indexes if they happen to appear.
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$alterCol = "\nDROP INDEX \"$tableName\"." . $indexList[$colName]['indexname'] . ';';
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}
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$prefix="ALTER TABLE \"" . $tableName . "\" ";
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// Remove the old default prior to adjusting the column.
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if($defaultConstraintName = $this->defaultConstraintName($tableName, $colName)) {
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$alterCol .= ";\n$prefix DROP CONSTRAINT \"$defaultConstraintName\"";
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}
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if(isset($matches[1])) {
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//We will prevent any changes being made to the ID column. Primary key indexes will have a fit if we do anything here.
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if($colName!='ID'){
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$alterCol .= ";\n$prefix ALTER COLUMN \"$colName\" $matches[1]";
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// SET null / not null
|
|
if(!empty($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;
|
|
}
|
|
|
|
/**
|
|
* Helper function used by checkAndRepairTable.
|
|
* @param string $sql Query to run.
|
|
* @return boolean Returns if the query returns a successful result.
|
|
*/
|
|
protected function runTableCheckCommand($sql) {
|
|
$testResults = $this->query($sql);
|
|
foreach($testResults as $testRecord) {
|
|
if(strtolower($testRecord['Msg_text']) != 'ok') {
|
|
return false;
|
|
}
|
|
}
|
|
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....
|
|
$fields = $this->query("SELECT ordinal_position, column_name, data_type, column_default,
|
|
is_nullable, character_maximum_length, numeric_precision, numeric_scale
|
|
FROM information_schema.columns WHERE table_name = '$table'
|
|
ORDER BY ordinal_position;");
|
|
|
|
$output = array();
|
|
if($fields) foreach($fields as $field) {
|
|
// Update the data_type field to be a complete column definition string for use by
|
|
// Database::requireField()
|
|
switch($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 '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 $indexSpec The specification of the index, see Database::requireIndex() for more details.
|
|
*/
|
|
public function createIndex($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 $indexSpec;
|
|
}
|
|
|
|
protected function getIndexSqlDefinition($tableName, $indexName, $indexSpec) {
|
|
|
|
if(!is_array($indexSpec)){
|
|
$indexSpec=trim($indexSpec, '()');
|
|
$bits=explode(',', $indexSpec);
|
|
$indexes="\"" . implode("\",\"", $bits) . "\"";
|
|
|
|
return 'create index ix_' . $tableName . '_' . $indexName . " 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);
|
|
|
|
//First, we need to see if a full text search already exists:
|
|
$result=$this->query("SELECT object_id FROM sys.fulltext_indexes WHERE object_id=object_id('$tableName');")->first();
|
|
|
|
$drop='';
|
|
if($result)
|
|
$drop="DROP FULLTEXT INDEX ON \"" . $tableName . "\";";
|
|
|
|
return $drop . "CREATE FULLTEXT INDEX ON \"$tableName\" ({$indexSpec['value']}) " .
|
|
"KEY INDEX $primary_key WITH CHANGE_TRACKING AUTO;";
|
|
}
|
|
|
|
}
|
|
|
|
if($indexSpec['type']=='unique')
|
|
return 'create unique index ix_' . $tableName . '_' . $indexName . " ON \"" . $tableName . "\" (\"" . $indexSpec['value'] . "\");";
|
|
}
|
|
|
|
}
|
|
|
|
function getDbSqlDefinition($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 $indexSpec The specification of the index, see Database::requireIndex() for more details.
|
|
*/
|
|
public function alterIndex($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 $index) {
|
|
|
|
//Check for uniques:
|
|
if(strpos($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 $this->lastAffectedRows;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A function to return the field names and datatypes for the particular table
|
|
*/
|
|
public function tableDetails($tableName){
|
|
user_error("tableDetails not implemented", E_USER_WARNING);
|
|
return array();
|
|
/*
|
|
$query="SELECT a.attname as \"Column\", pg_catalog.format_type(a.atttypid, a.atttypmod) as \"Datatype\" FROM pg_catalog.pg_attribute a WHERE a.attnum > 0 AND NOT a.attisdropped AND a.attrelid = ( SELECT c.oid FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE c.relname ~ '^($tableName)$' AND pg_catalog.pg_table_is_visible(c.oid));";
|
|
$result=DB::query($query);
|
|
|
|
$table=Array();
|
|
while($row=pg_fetch_assoc($result)){
|
|
$table[]=Array('Column'=>$row['Column'], 'DataType'=>$row['DataType']);
|
|
}
|
|
|
|
return $table;
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
//Annoyingly, we need to do a good ol' fashioned switch here:
|
|
($values['default']) ? $default='1' : $default='0';
|
|
|
|
if($asDbValue) {
|
|
return array(
|
|
'data_type'=>'bit',
|
|
'default' => $default
|
|
);
|
|
} else {
|
|
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, $asDbValue=false){
|
|
if($asDbValue) {
|
|
return array(
|
|
'data_type' => 'decimal',
|
|
);
|
|
} else {
|
|
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, $asDbValue=false){
|
|
// Avoid empty strings being put in the db
|
|
if($values['precision'] == '') {
|
|
$precision = 1;
|
|
} else {
|
|
$precision = $values['precision'];
|
|
}
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'decimal', 'numeric_precision'=>'9,2');
|
|
else return 'decimal(' . $precision . ') not null default 0';
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
// 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', $values['enums']));
|
|
|
|
if($asDbValue) {
|
|
return array(
|
|
'data_type'=>'varchar',
|
|
'default' => $values['default'],
|
|
'character_maximum_length'=>$maxLength,
|
|
);
|
|
} else {
|
|
return "varchar($maxLength) not null default '" . $values['default']
|
|
. "' check(\"" . $values['name'] . "\" in ('" . implode("','", $values['enums'])
|
|
. "'))";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
if($asDbValue)
|
|
return Array('data_type'=>'float');
|
|
else return 'float';
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
//We'll be using an 8 digit precision to keep it in line with the serial8 datatype for ID columns
|
|
if($asDbValue)
|
|
return Array('data_type'=>'numeric', 'numeric_precision'=>'8', 'default'=>(int)$values['default']);
|
|
else
|
|
return 'numeric(8) not null default ' . (int)$values['default'];
|
|
}
|
|
|
|
/**
|
|
* Return a datetime type-formatted string
|
|
* For MS SQL, we simply return the word 'timestamp', no other parameters are necessary
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function ssdatetime($values, $asDbValue=false){
|
|
if($asDbValue)
|
|
return Array('data_type'=>'datetime');
|
|
else
|
|
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, $asDbValue=false){
|
|
if($asDbValue) {
|
|
return array(
|
|
'data_type'=>'varchar',
|
|
'character_maximum_length' => -1,
|
|
);
|
|
} else {
|
|
return 'varchar(max) 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, $asDbValue=false){
|
|
if($asDbValue)
|
|
return Array('data_type'=>'varchar', 'character_maximum_length'=>$values['precision']);
|
|
else
|
|
return 'varchar(' . $values['precision'] . ') null';
|
|
}
|
|
|
|
/**
|
|
* Return a 4 digit numeric type.
|
|
* @return string
|
|
*/
|
|
public function year($values, $asDbValue=false){
|
|
if($asDbValue)
|
|
return Array('data_type'=>'numeric', 'numeric_precision'=>'4');
|
|
else return 'numeric(4)';
|
|
}
|
|
|
|
function escape_character($escape=false){
|
|
if($escape)
|
|
return "\\\"";
|
|
else
|
|
return "\"";
|
|
}
|
|
|
|
/**
|
|
* Create a fulltext search datatype for MSSQL.
|
|
*
|
|
* @param array $spec
|
|
*/
|
|
function fulltext($table, $spec){
|
|
//$spec['name'] is the column we've created that holds all the words we want to index.
|
|
//This is a coalesced collection of multiple columns if necessary
|
|
//$spec='create index ix_' . $table . '_' . $spec['name'] . ' on ' . $table . ' using gist(' . $spec['name'] . ');';
|
|
|
|
//return $spec;
|
|
echo '<span style="color: Red">full text just got called!</span><br>';
|
|
return '';
|
|
}
|
|
|
|
/**
|
|
* This returns the column which is the primary key for each table
|
|
* In Postgres, it is a SERIAL8, which is the equivalent of an auto_increment
|
|
*
|
|
* @return string
|
|
*/
|
|
function IdColumn($asDbValue=false, $hasAutoIncPK=true){
|
|
|
|
if($asDbValue)
|
|
return 'bigint not null';
|
|
else {
|
|
if($hasAutoIncPK)
|
|
return 'bigint identity(1,1)';
|
|
else return 'bigint not null';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the SQL command to get all the tables in this database
|
|
*/
|
|
function allTablesSQL(){
|
|
return "SELECT name FROM {$this->database}..sysobjects WHERE xtype = 'U';";
|
|
}
|
|
|
|
/**
|
|
* Returns true if this table exists
|
|
* @todo Make a proper implementation
|
|
*/
|
|
function hasTable($tableName) {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns the values of the given enum field
|
|
* NOTE: Experimental; introduced for db-abstraction and may changed before 2.4 is released.
|
|
*/
|
|
public function enumValuesForField($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;
|
|
}
|
|
|
|
/**
|
|
* Because NOW() doesn't always work...
|
|
* MSSQL, I'm looking at you
|
|
*
|
|
*/
|
|
function now(){
|
|
return 'CURRENT_TIMESTAMP';
|
|
}
|
|
|
|
/**
|
|
* Returns the database-specific version of the random() function
|
|
*/
|
|
function random(){
|
|
return 'RAND()';
|
|
}
|
|
|
|
/**
|
|
* 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 $value;
|
|
}
|
|
|
|
/*
|
|
* This changes the index name depending on database requirements.
|
|
* MSSQL requires commas to be replaced with underscores
|
|
*/
|
|
function modifyIndex($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 = "", $invertedMatch = false) {
|
|
if($this->fullTextEnabled) {
|
|
$keywords = Convert::raw2sql(trim($keywords));
|
|
$htmlEntityKeywords = htmlentities($keywords);
|
|
|
|
$keywordList = explode(' ', $keywords);
|
|
if($keywordList) {
|
|
foreach($keywordList as $index => $keyword) {
|
|
$keywordList[$index] = "\"{$keyword}\"";
|
|
}
|
|
$keywords = implode(' AND ', $keywordList);
|
|
}
|
|
|
|
$htmlEntityKeywordList = explode(' ', $htmlEntityKeywords);
|
|
if($htmlEntityKeywordList) {
|
|
foreach($htmlEntityKeywordList as $index => $keyword) {
|
|
$htmlEntityKeywordList[$index] = "\"{$keyword}\"";
|
|
}
|
|
$htmlEntityKeywords = implode(' AND ', $htmlEntityKeywordList);
|
|
}
|
|
|
|
//Get a list of all the tables and columns we'll be searching on:
|
|
$result=DB::query('EXEC sp_help_fulltext_columns');
|
|
if (!$result->numRecords()) throw Exception('there are no full text columns to search');
|
|
$tables= array();
|
|
|
|
foreach($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']}\", '$keywords') OR CONTAINS(\"{$row['FULLTEXT_COLUMN_NAME']}\", '$htmlEntityKeywords'))";
|
|
if(strpos($row['TABLE_NAME'], 'SiteTree') === 0) {
|
|
$thisSql .= " AND ShowInSearch != 0)";//" OR (Title LIKE '%$keywords%' OR Title LIKE '%$htmlEntityKeywords%')";
|
|
} else {
|
|
$thisSql .= ')';
|
|
}
|
|
|
|
$tables[] = $thisSql;
|
|
}
|
|
|
|
}
|
|
|
|
$totalCount = 0;
|
|
$this->forceNumRows = true;
|
|
foreach($tables as $q) {
|
|
$qR = DB::query($q);
|
|
$totalCount += $qR->numRecords();
|
|
}
|
|
$this->forceNumRows = false;
|
|
|
|
//We'll do a union query on all of these tables... it's easier!
|
|
$query=implode(' UNION ', $tables);
|
|
|
|
$result=DB::query($query);
|
|
$searchResults=new DataObjectSet();
|
|
|
|
foreach($result as $row){
|
|
$row_result=DataObject::get_by_id($row['Source'], $row['ID']);
|
|
$searchResults->push($row_result);
|
|
}
|
|
|
|
$searchResults->setPageLimits($start, $pageLength, $totalCount);
|
|
}
|
|
|
|
return $searchResults;
|
|
}
|
|
|
|
/**
|
|
* 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"));
|
|
}
|
|
|
|
/**
|
|
* 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, $session_characteristics=false){
|
|
//Transactions not set up for MSSQL yet
|
|
}
|
|
|
|
/*
|
|
* Create a savepoint that you can jump back to if you encounter problems
|
|
*/
|
|
public function transactionSavepoint($savepoint){
|
|
//Transactions not set up for MSSQL yet
|
|
}
|
|
|
|
/*
|
|
* 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){
|
|
//Transactions not set up for MSSQL yet
|
|
}
|
|
|
|
/*
|
|
* Commit everything inside this transaction so far
|
|
*/
|
|
public function endTransaction(){
|
|
//Transactions not set up for MSSQL yet
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A result-set from a MSSQL database.
|
|
* @package sapphire
|
|
* @subpackage model
|
|
*/
|
|
class MSSQLQuery extends 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($this->handle);
|
|
} else {
|
|
if($this->handle) sqlsrv_free_stmt($this->handle);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Please see the comments below for numRecords
|
|
*/
|
|
public function seek($row) {
|
|
if($this->mssql) {
|
|
return mssql_data_seek($this->handle, $row);
|
|
} else {
|
|
user_error("MSSQLQuery::seek() sqlserv doesn't support seek.", E_USER_WARNING);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we're running the sqlsrv set of functions, then the dataobject set is a forward-only cursor
|
|
* Therefore, we do not have access to the number of rows that this result contains
|
|
* This is (usually) called from Database::rewind(), which in turn seems to be called when a foreach...
|
|
* is started on a recordset
|
|
*
|
|
* If you are using SQLSRV, this functon will just return a true or false based on whether you got
|
|
* /ANY/ rows. UNLESS you set $this->forceNumRows to true, in which case, it will loop over the whole
|
|
* rowset, cache it, and then do the count on that. This is probably resource intensive.
|
|
*
|
|
* For this function, and seek() (above), we will be returning false.
|
|
*/
|
|
public function numRecords() {
|
|
if($this->mssql) {
|
|
return mssql_num_rows($this->handle);
|
|
} else {
|
|
// Setting forceNumRows to true will cache all records, but will
|
|
// be able to give a reliable number of results found.
|
|
if (isset($this->forceNumRows) && $this->forceNumRows) {
|
|
if (isset($this->numRecords)) return $this->numRecords;
|
|
|
|
$this->cachedRecords = array();
|
|
|
|
// We can't have nextRecord() return the row we just added =)
|
|
$this->cachingRows = true;
|
|
|
|
foreach($this as $record) {
|
|
$this->cachedRecords[] = $record;
|
|
}
|
|
|
|
$this->cachingRows = false;
|
|
|
|
// Assign it to a var, otherwise the value will change when
|
|
// something is shifted off the beginning.
|
|
$this->numRecords = count($this->cachedRecords);
|
|
return $this->numRecords;
|
|
} else {
|
|
$this->cachedRecords = array($this->nextRecord());
|
|
return count($this->cachedRecords[0]) ? true : false;
|
|
}
|
|
}
|
|
}
|
|
|
|
public function nextRecord() {
|
|
// Coalesce rather than replace common fields.
|
|
if($this->mssql) {
|
|
if($data = mssql_fetch_row($this->handle)) {
|
|
|
|
foreach($data as $columnIdx => $value) {
|
|
$columnName = mssql_field_name($this->handle, $columnIdx);
|
|
// $value || !$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 $output;
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
} else {
|
|
// If we have cached rows (if numRecords as been called) and
|
|
// returning cached rows hasn't specifically been disabled,
|
|
// check for cached rows and return 'em.
|
|
if (isset($this->cachedRecords) && count($this->cachedRecords) && (!isset($this->cachingRows) || !$this->cachingRows)) {
|
|
return array_shift($this->cachedRecords);
|
|
}
|
|
if($this->handle && $data = sqlsrv_fetch_array($this->handle, SQLSRV_FETCH_NUMERIC)) {
|
|
$output = array();
|
|
$fields = sqlsrv_field_metadata($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 $output;
|
|
} else {
|
|
// Free the handle if there are no more results - sqlserv crashes if there are too many handles
|
|
if($this->handle) {
|
|
sqlsrv_free_stmt($this->handle);
|
|
$this->handle = false;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
} |