1285 lines
40 KiB
PHP
1285 lines
40 KiB
PHP
<?php
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/**
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* SQLite connector class.
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* @package SQLite3
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*/
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class SQLite3Database extends SS_Database {
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/**
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* Connection to the DBMS.
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* @var object
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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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* This holds the name of the original database
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* So if you switch to another for unit tests, you
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* can then switch back in order to drop the temp database
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*/
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protected $database_original;
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/*
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* This holds the parameters that the original connection was created with,
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* so we can switch back to it if necessary (used for unit tests)
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*/
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protected $parameters;
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public static $default_pragma = array();
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public static $vacuum = true;
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/**
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* Connect to a SQLite3 database.
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* @param array $parameters An map of parameters, which should include:
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* - database: The database to connect to
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* - path: the path to the SQLite3 database file
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* - key: the encryption key (needs testing)
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* - memory: use the faster In-Memory database for unit tests
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*/
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public function __construct($parameters) {
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//We will store these connection parameters for use elsewhere (ie, unit tests)
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$this->parameters=$parameters;
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$this->connectDatabase();
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$this->database_original=$this->database;
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}
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/*
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* Uses whatever connection details are in the $parameters array to connect to a database of a given name
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*/
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function connectDatabase() {
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$this->enum_map = array();
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$parameters = $this->parameters;
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if(!empty($parameters['memory'])) {
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Deprecation::notice(
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'1.4.0',
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"\$databaseConfig['memory'] is deprecated. Use \$databaseConfig['path'] = ':memory:' instead.",
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Deprecation::SCOPE_GLOBAL
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);
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$parameters['path'] = ':memory:';
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}
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$dbName = !isset($this->database) ? $parameters['database'] : $this->database;
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$file = $parameters['path'];
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// assumes that the path to dbname will always be provided
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// this is only necessary if we're using a filesystem path, and not an in-memory database
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if($file != ':memory:') {
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$file = $parameters['path'] . '/' . $dbName;
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if(!file_exists($parameters['path'])) {
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SQLiteDatabaseConfigurationHelper::create_db_dir($parameters['path']);
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SQLiteDatabaseConfigurationHelper::secure_db_dir($parameters['path']);
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}
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}
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$this->dbConn = new SQLite3($file, SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE, $parameters['key']);
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if(method_exists('SQLite3', 'busyTimeout')) $this->dbConn->busyTimeout(60000);
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$this->active = true;
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$this->database = $dbName;
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if(!$this->dbConn) {
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$this->databaseError("Couldn't connect to SQLite3 database");
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return false;
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}
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foreach(self::$default_pragma as $pragma => $value) $this->pragma($pragma, $value);
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if(empty(self::$default_pragma['locking_mode'])) {
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self::$default_pragma['locking_mode'] = $this->pragma('locking_mode');
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}
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return true;
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}
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public function __destruct() {
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if($this->dbConn) {
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$this->dbConn->close();
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}
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}
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/**
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* Not implemented, needed for PDO
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*/
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public function getConnect($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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* TODO: get rid of this?
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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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public function supportsTimezoneOverride() {
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return false;
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}
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/**
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* Get the version of SQLite3.
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* @return float
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*/
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public function getVersion() {
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return $this->query("SELECT sqlite_version()")->value();
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}
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/**
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* Execute PRAGMA commands.
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* works as getter and setter for connection params
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* @param String pragma name
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* @param String optional value to set
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* @return String the pragma value
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*/
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protected function pragma($pragma, $value = null) {
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if(strlen($value)) {
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$this->query("PRAGMA $pragma = $value");
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} else {
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$value = $this->query("PRAGMA $pragma")->value();
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}
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return $value;
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}
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/**
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* Get the database server, namely SQLite3.
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* @return string
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*/
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public function getDatabaseServer() {
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return "SQLite3";
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}
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public function query($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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$starttime = microtime(true);
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}
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@$handle = $this->dbConn->query($sql);
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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) {
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$this->databaseError("Couldn't run query: $sql | " . $this->dbConn->lastErrorMsg(), $errorLevel);
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}
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return new SQLite3Query($this, $handle);
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}
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public function getGeneratedID($table) {
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return $this->dbConn->lastInsertRowID();
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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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*
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* @var string $table The name od the table.
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* @return int
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*/
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public function getNextID($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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* This will create a database based on whatever is in the $this->database value
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* So you need to have called $this->selectDatabase() first, or used the __construct method
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*/
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public function createDatabase() {
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$this->dbConn = null;
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$fullpath = $this->parameters['path'] . '/' . $this->database;
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if(is_writable($fullpath)) unlink($fullpath);
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$this->connectDatabase();
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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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//First, we need to switch back to the original database so we can drop the current one
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$this->dbConn = null;
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$db_to_drop=$this->database;
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$this->selectDatabase($this->database_original);
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$this->connectDatabase();
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$fullpath = $this->parameters['path'] . '/' . $db_to_drop;
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if(is_writable($fullpath)) unlink($fullpath);
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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 $this->database;
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}
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/**
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* Switches to the given database.
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* If the database doesn't exist, you should call createDatabase() after calling selectDatabase()
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*/
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public function selectDatabase($dbname) {
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$this->database=$dbname;
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$this->tableList = $this->fieldList = $this->indexList = null;
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return true;
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}
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/**
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* Returns true if the named database exists.
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*/
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public function databaseExists($name) {
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$SQL_name=Convert::raw2sql($name);
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$result=$this->query("PRAGMA database_list");
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foreach($result as $db) if($db['name'] == 'main' && preg_match('/\/' . $name . '/', $db['file'])) return true;
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if(file_exists($this->parameters['path'] . '/' . $name)) return true;
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return false;
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}
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function beginSchemaUpdate() {
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$this->pragma('locking_mode', 'EXCLUSIVE');
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$this->checkAndRepairTable();
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// if($this->TableExists('SQLiteEnums')) $this->query("DELETE FROM SQLiteEnums");
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$this->checkAndRepairTable();
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parent::beginSchemaUpdate();
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}
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function endSchemaUpdate() {
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parent::endSchemaUpdate();
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$this->pragma('locking_mode', self::$default_pragma['locking_mode']);
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}
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public function clearTable($table) {
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if($table != 'SQLiteEnums') $this->dbConn->query("DELETE FROM \"$table\"");
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}
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public function createTable($table, $fields = null, $indexes = null, $options = null, $advancedOptions = null) {
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if(!isset($fields['ID'])) $fields['ID'] = $this->IdColumn();
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$fieldSchemata = array();
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if($fields) foreach($fields as $k => $v) {
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$fieldSchemata[] = "\"$k\" $v";
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}
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$fieldSchemas = implode(",\n",$fieldSchemata);
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// Switch to "CREATE TEMPORARY TABLE" for temporary tables
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$temporary = empty($options['temporary']) ? "" : "TEMPORARY";
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$this->query("CREATE $temporary TABLE \"$table\" (
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$fieldSchemas
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)");
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if($indexes) {
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foreach($indexes as $indexName => $indexDetails) {
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$this->createIndex($table, $indexName, $indexDetails);
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}
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}
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return $table;
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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, $advancedOptions = null) {
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if($newFields) foreach($newFields as $fieldName => $fieldSpec) $this->createField($tableName, $fieldName, $fieldSpec);
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if($alteredFields) foreach($alteredFields as $fieldName => $fieldSpec) $this->alterField($tableName, $fieldName, $fieldSpec);
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if($newIndexes) foreach($newIndexes as $indexName => $indexSpec) $this->createIndex($tableName, $indexName, $indexSpec);
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if($alteredIndexes) foreach($alteredIndexes as $indexName => $indexSpec) $this->alterIndex($tableName, $indexName, $indexSpec);
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}
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public function renameTable($oldTableName, $newTableName) {
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$this->query("ALTER TABLE \"$oldTableName\" RENAME TO \"$newTableName\"");
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}
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protected static $checked_and_repaired = false;
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/**
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* Repairs and reindexes the table. This might take a long time on a very large table.
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* @var string $tableName The name of the table.
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* @return boolean Return true if the table has integrity after the method is complete.
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*/
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public function checkAndRepairTable($tableName = null) {
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$ok = true;
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if(!SapphireTest::using_temp_db() && !self::$checked_and_repaired) {
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$this->alterationMessage("Checking database integrity","repaired");
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if($msgs = $this->query('PRAGMA integrity_check')) foreach($msgs as $msg) if($msg['integrity_check'] != 'ok') { Debug::show($msg['integrity_check']); $ok = false; }
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if(self::$vacuum) {
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$this->query('VACUUM', E_USER_NOTICE);
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if($this instanceof SQLitePDODatabase) {
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$msg = $this->dbConn->errorInfo();
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$msg = isset($msg[2]) ? $msg[2] : 'no errors';
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} else {
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$msg = $this->dbConn->lastErrorMsg();
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}
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if(preg_match('/authoriz/', $msg)) {
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$this->alterationMessage('VACUUM | ' . $msg, "error");
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} else {
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$this->alterationMessage("VACUUMing", "repaired");
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}
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}
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self::$checked_and_repaired = true;
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}
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return $ok;
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}
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public function createField($tableName, $fieldName, $fieldSpec) {
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$this->query("ALTER TABLE \"$tableName\" ADD \"$fieldName\" $fieldSpec");
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}
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/**
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* Change the database type of the given field.
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* @param string $tableName The name of the tbale the field is in.
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* @param string $fieldName The name of the field to change.
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* @param string $fieldSpec The new field specification
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*/
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public function alterField($tableName, $fieldName, $fieldSpec) {
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$oldFieldList = $this->fieldList($tableName);
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$fieldNameList = '"' . implode('","', array_keys($oldFieldList)) . '"';
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if(!empty($_REQUEST['avoidConflict']) && Director::isDev()) $fieldSpec = preg_replace('/\snot null\s/i', ' NOT NULL ON CONFLICT REPLACE ', $fieldSpec);
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if(array_key_exists($fieldName, $oldFieldList)) {
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$oldCols = array();
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foreach($oldFieldList as $name => $spec) {
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$newColsSpec[] = "\"$name\" " . ($name == $fieldName ? $fieldSpec : $spec);
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}
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$queries = array(
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"BEGIN TRANSACTION",
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"CREATE TABLE \"{$tableName}_alterfield_{$fieldName}\"(" . implode(',', $newColsSpec) . ")",
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"INSERT INTO \"{$tableName}_alterfield_{$fieldName}\" SELECT {$fieldNameList} FROM \"$tableName\"",
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"DROP TABLE \"$tableName\"",
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"ALTER TABLE \"{$tableName}_alterfield_{$fieldName}\" RENAME TO \"$tableName\"",
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"COMMIT"
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);
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$indexList = $this->indexList($tableName);
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foreach($queries as $query) $this->query($query.';');
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foreach($indexList as $indexName => $indexSpec) $this->createIndex($tableName, $indexName, $indexSpec);
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}
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}
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/**
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* Change the database column name of the given field.
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*
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* @param string $tableName The name of the tbale the field is in.
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* @param string $oldName The name of the field to change.
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* @param string $newName The new name of the field
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*/
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public function renameField($tableName, $oldName, $newName) {
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$oldFieldList = $this->fieldList($tableName);
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$oldCols = array();
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if(array_key_exists($oldName, $oldFieldList)) {
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foreach($oldFieldList as $name => $spec) {
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$oldCols[] = "\"$name\"" . (($name == $oldName) ? " AS $newName" : '');
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$newCols[] = "\"". (($name == $oldName) ? $newName : $name). "\"";
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$newColsSpec[] = "\"" . (($name == $oldName) ? $newName : $name) . "\" $spec";
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}
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// SQLite doesn't support direct renames through ALTER TABLE
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$queries = array(
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"BEGIN TRANSACTION",
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"CREATE TABLE \"{$tableName}_renamefield_{$oldName}\" (" . implode(',', $newColsSpec) . ")",
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"INSERT INTO \"{$tableName}_renamefield_{$oldName}\" SELECT " . implode(',', $oldCols) . " FROM \"$tableName\"",
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"DROP TABLE \"$tableName\"",
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"ALTER TABLE \"{$tableName}_renamefield_{$oldName}\" RENAME TO \"$tableName\"",
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"COMMIT"
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);
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// Remember original indexes
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$oldIndexList = $this->indexList($tableName);
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// Then alter the table column
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foreach($queries as $query) $this->query($query.';');
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// Recreate the indexes
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foreach($oldIndexList as $indexName => $indexSpec) {
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$renamedIndexSpec = array();
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foreach(explode(',', $indexSpec) as $col) {
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$col = trim($col, '"'); // remove quotes
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$renamedIndexSpec[] = ($col == $oldName) ? $newName : $col;
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}
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$this->createIndex($tableName, $indexName, implode(',', $renamedIndexSpec));
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}
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}
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}
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public function fieldList($table) {
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$sqlCreate = DB::query('SELECT sql FROM sqlite_master WHERE type = "table" AND name = "' . $table . '"')->record();
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$fieldList = array();
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if($sqlCreate && $sqlCreate['sql']) {
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preg_match('/^[\s]*CREATE[\s]+TABLE[\s]+[\'"]?[a-zA-Z0-9_\\\]+[\'"]?[\s]*\((.+)\)[\s]*$/ims', $sqlCreate['sql'], $matches);
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$fields = isset($matches[1]) ? preg_split('/,(?=(?:[^\'"]*$)|(?:[^\'"]*[\'"][^\'"]*[\'"][^\'"]*)*$)/x', $matches[1]) : array();
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foreach($fields as $field) {
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$details = preg_split('/\s/', trim($field));
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$name = array_shift($details);
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$name = str_replace('"', '', trim($name));
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$fieldList[$name] = implode(' ', $details);
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}
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}
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return $fieldList;
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}
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/**
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* Create an index on a table.
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* @param string $tableName The name of the table.
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* @param string $indexName The name of the index.
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* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
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*/
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public function createIndex($tableName, $indexName, $indexSpec) {
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$spec = $this->convertIndexSpec($indexSpec, $indexName);
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if(!preg_match('/".+"/', $indexName)) $indexName = "\"$indexName\"";
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$this->query("CREATE INDEX IF NOT EXISTS $indexName ON \"$tableName\" ($spec)");
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}
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/*
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* This takes the index spec which has been provided by a class (ie static $indexes = blah blah)
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* and turns it into a proper string.
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* Some indexes may be arrays, such as fulltext and unique indexes, and this allows database-specific
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* arrays to be created.
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*/
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public function convertIndexSpec($indexSpec, $indexName = null) {
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if(is_array($indexSpec)) {
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$indexSpec = $indexSpec['value'];
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} else if(is_numeric($indexSpec)) {
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$indexSpec = $indexName;
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}
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if(preg_match('/\((.+)\)/', $indexSpec, $matches)) {
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$indexSpec = $matches[1];
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}
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|
|
|
return preg_replace('/\s/', '', $indexSpec);
|
|
}
|
|
|
|
/**
|
|
* prefix indexname with uppercase tablename if not yet done, in order to avoid ambiguity
|
|
*/
|
|
function getDbSqlDefinition($tableName, $indexName, $indexSpec) {
|
|
return "\"$tableName.$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) {
|
|
$this->createIndex($tableName, $indexName, $indexSpec);
|
|
}
|
|
|
|
/**
|
|
* Return the list of indexes in a table.
|
|
* @param string $table The table name.
|
|
* @return array
|
|
*/
|
|
public function indexList($table) {
|
|
$indexList = array();
|
|
foreach(DB::query('PRAGMA index_list("' . $table . '")') as $index) {
|
|
$list = array();
|
|
foreach(DB::query('PRAGMA index_info("' . $index["name"] . '")') as $details) $list[] = $details['name'];
|
|
$indexList[$index["name"]] = implode(',', $list);
|
|
}
|
|
foreach($indexList as $name => $val) {
|
|
// Normalize quoting to avoid false positives when checking for index changes
|
|
// during schema generation
|
|
$valParts = preg_split('/\s*,\s*/', $val);
|
|
foreach($valParts as $i => $valPart) {
|
|
$valParts[$i] = preg_replace('/^"?(.*)"?$/', '$1', $valPart);
|
|
}
|
|
|
|
$indexList[$name] = '"' . implode('","', $valParts) . '"';
|
|
}
|
|
|
|
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('SELECT name FROM sqlite_master WHERE type = "table"') as $record) {
|
|
//$table = strtolower(reset($record));
|
|
$table = reset($record);
|
|
$tables[strtolower($table)] = $table;
|
|
}
|
|
|
|
//Return an empty array if there's nothing in this database
|
|
return isset($tables) ? $tables : Array();
|
|
}
|
|
|
|
function TableExists($tableName){
|
|
|
|
$result=$this->query('SELECT name FROM sqlite_master WHERE type = "table" AND name="' . $tableName . '"')->first();
|
|
|
|
if($result)
|
|
return true;
|
|
else
|
|
return false;
|
|
|
|
}
|
|
|
|
/**
|
|
* Return the number of rows affected by the previous operation.
|
|
* @return int
|
|
*/
|
|
public function affectedRows() {
|
|
return $this->dbConn->changes();
|
|
}
|
|
|
|
/**
|
|
* Return a boolean type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function boolean($values){
|
|
|
|
return 'BOOL NOT NULL DEFAULT ' . (isset($values['default']) ? (int)$values['default'] : 0);
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 "TEXT";
|
|
|
|
}
|
|
|
|
/**
|
|
* 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){
|
|
|
|
$default = isset($values['default']) && is_numeric($values['default']) ? $values['default'] : 0;
|
|
return "NUMERIC NOT NULL DEFAULT " . $default;
|
|
|
|
}
|
|
|
|
/**
|
|
* Return a enum type-formatted string
|
|
*
|
|
* enumus are not supported. as a workaround to store allowed values we creates an additional table
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
protected $enum_map = array();
|
|
|
|
public function enum($values){
|
|
$tablefield = $values['table'] . '.' . $values['name'];
|
|
if(empty($this->enum_map)) $this->query("CREATE TABLE IF NOT EXISTS \"SQLiteEnums\" (\"TableColumn\" TEXT PRIMARY KEY, \"EnumList\" TEXT)");
|
|
if(empty($this->enum_map[$tablefield]) || $this->enum_map[$tablefield] != implode(',', $values['enums'])) {
|
|
$this->query("REPLACE INTO SQLiteEnums (TableColumn, EnumList) VALUES (\"{$tablefield}\", \"" . implode(',', $values['enums']) . "\")");
|
|
$this->enum_map[$tablefield] = implode(',', $values['enums']);
|
|
}
|
|
return "TEXT DEFAULT '{$values['default']}'";
|
|
}
|
|
|
|
/**
|
|
* Return a set type-formatted string
|
|
* This type doesn't exist in SQLite as well
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function set($values) {
|
|
$tablefield = $values['table'] . '.' . $values['name'];
|
|
if(empty($this->enum_map)) $this->query("CREATE TABLE IF NOT EXISTS SQLiteEnums (TableColumn TEXT PRIMARY KEY, EnumList TEXT)");
|
|
if(empty($this->enum_map[$tablefield]) || $this->enum_map[$tablefield] != implode(',', $values['enums'])) {
|
|
$this->query("REPLACE INTO SQLiteEnums (TableColumn, EnumList) VALUES (\"{$tablefield}\", \"" . implode(',', $values['enums']) . "\")");
|
|
$this->enum_map[$tablefield] = implode(',', $values['enums']);
|
|
}
|
|
$default = '';
|
|
if(!empty($values['default'])) {
|
|
$default = str_replace(array('"',"'","\\","\0"), "", $values['default']);
|
|
$default = " DEFAULT '$default'";
|
|
}
|
|
return 'TEXT' . $default;
|
|
}
|
|
|
|
/**
|
|
* 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){
|
|
|
|
return "REAL";
|
|
|
|
}
|
|
|
|
/**
|
|
* Return a Double type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function Double($values, $asDbValue=false){
|
|
|
|
return "REAL";
|
|
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
|
|
return "INTEGER({$values['precision']}) " . strtoupper($values['null']) . " DEFAULT " . (int)$values['default'];
|
|
|
|
}
|
|
|
|
/**
|
|
* Return a datetime type-formatted string
|
|
* For SQLite3, we simply return the word 'TEXT', 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, $asDbValue=false){
|
|
|
|
return "DATETIME";
|
|
|
|
}
|
|
|
|
/**
|
|
* 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){
|
|
|
|
return 'TEXT';
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 "TEXT";
|
|
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
return "VARCHAR({$values['precision']}) COLLATE NOCASE";
|
|
}
|
|
|
|
/*
|
|
* Return a 4 digit numeric type. MySQL has a proprietary 'Year' type.
|
|
* For SQLite3 we use TEXT
|
|
*/
|
|
public function year($values, $asDbValue=false){
|
|
|
|
return "TEXT";
|
|
|
|
}
|
|
|
|
function escape_character($escape=false){
|
|
|
|
if($escape) return "\\\""; else return "\"";
|
|
|
|
}
|
|
|
|
/**
|
|
* This returns the column which is the primary key for each table
|
|
* In SQLite3 it is INTEGER PRIMARY KEY AUTOINCREMENT
|
|
* SQLite3 does autoincrement ids even without the AUTOINCREMENT keyword, but the behaviour is signifficantly different
|
|
*
|
|
* @return string
|
|
*/
|
|
function IdColumn($asDbValue=false){
|
|
return 'INTEGER PRIMARY KEY AUTOINCREMENT';
|
|
}
|
|
|
|
/**
|
|
* Returns true if this table exists
|
|
*/
|
|
function hasTable($tableName) {
|
|
$SQL_table = Convert::raw2sql($tableName);
|
|
return (bool)($this->query("SELECT name FROM sqlite_master WHERE type = \"table\" AND name = \"$tableName\"")->value());
|
|
}
|
|
|
|
/**
|
|
* Returns the SQL command to get all the tables in this database
|
|
*/
|
|
function allTablesSQL(){
|
|
return 'SELECT name FROM sqlite_master WHERE type = "table"';
|
|
}
|
|
|
|
/**
|
|
* Return enum values for the given field
|
|
* @return array
|
|
*/
|
|
public function enumValuesForField($tableName, $fieldName) {
|
|
$classnameinfo = DB::query("SELECT EnumList FROM SQLiteEnums WHERE TableColumn = \"{$tableName}.{$fieldName}\"")->first();
|
|
$output = array();
|
|
if($classnameinfo) {
|
|
$output = explode(',', $classnameinfo['EnumList']);
|
|
}
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Get the actual enum fields from the constraint value:
|
|
*/
|
|
protected function EnumValuesFromConstraint($constraint){
|
|
$constraint=substr($constraint, strpos($constraint, 'ANY (ARRAY[')+11);
|
|
$constraint=substr($constraint, 0, -11);
|
|
$constraints=Array();
|
|
$segments=explode(',', $constraint);
|
|
foreach($segments as $this_segment){
|
|
$bits=preg_split('/ *:: */', $this_segment);
|
|
array_unshift($constraints, trim($bits[0], " '"));
|
|
}
|
|
|
|
return $constraints;
|
|
}
|
|
|
|
/*
|
|
* Returns the database-specific version of the now() function
|
|
*/
|
|
function now(){
|
|
return "datetime('now', 'localtime')";
|
|
}
|
|
|
|
/*
|
|
* Returns the database-specific version of the random() function
|
|
*/
|
|
function random(){
|
|
return 'random()';
|
|
}
|
|
|
|
/*
|
|
* This is a lookup table for data types.
|
|
* For instance, Postgres uses 'INT', while MySQL uses 'UNSIGNED'
|
|
* So this is a DB-specific list of equivalents.
|
|
*/
|
|
function dbDataType($type){
|
|
$values=Array(
|
|
'unsigned integer'=>'INT'
|
|
);
|
|
|
|
if(isset($values[$type]))
|
|
return $values[$type];
|
|
else return '';
|
|
}
|
|
|
|
/*
|
|
* This will return text which has been escaped in a database-friendly manner
|
|
*/
|
|
function addslashes($value){
|
|
return $this->dbConn->escapeString($value);
|
|
}
|
|
|
|
/*
|
|
* This changes the index name depending on database requirements.
|
|
*/
|
|
function modifyIndex($index, $spec){
|
|
return str_replace('"', '', $index);
|
|
}
|
|
|
|
/**
|
|
* The core search engine configuration.
|
|
* @todo There is a fulltext search for SQLite making use of virtual tables, the fts3 extension and the MATCH operator
|
|
* there are a few issues with fts:
|
|
* - shared cached lock doesn't allow to create virtual tables on versions prior to 3.6.17
|
|
* - there must not be more than one MATCH operator per statement
|
|
* - the fts3 extension needs to be available
|
|
* for now we use the MySQL implementation with the MATCH()AGAINST() uglily replaced with LIKE
|
|
*
|
|
* @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) {
|
|
$fileFilter = '';
|
|
$keywords = Convert::raw2sql(str_replace(array('*','+','-','"','\''),'',$keywords));
|
|
$htmlEntityKeywords = htmlentities(utf8_decode($keywords));
|
|
|
|
$extraFilters = array('SiteTree' => '', 'File' => '');
|
|
|
|
if($extraFilter) {
|
|
$extraFilters['SiteTree'] = " AND $extraFilter";
|
|
|
|
if($alternativeFileFilter) $extraFilters['File'] = " AND $alternativeFileFilter";
|
|
else $extraFilters['File'] = $extraFilters['SiteTree'];
|
|
}
|
|
|
|
// Always ensure that only pages with ShowInSearch = 1 can be searched
|
|
$extraFilters['SiteTree'] .= ' AND ShowInSearch <> 0';
|
|
// File.ShowInSearch was added later, keep the database driver backwards compatible
|
|
// by checking for its existence first
|
|
$fields = $this->fieldList('File');
|
|
if(array_key_exists('ShowInSearch', $fields)) {
|
|
$extraFilters['File'] .= " AND ShowInSearch <> 0";
|
|
}
|
|
|
|
$limit = $start . ", " . (int) $pageLength;
|
|
|
|
$notMatch = $invertedMatch ? "NOT " : "";
|
|
if($keywords) {
|
|
$match['SiteTree'] = "
|
|
(Title LIKE '%$keywords%' OR MenuTitle LIKE '%$keywords%' OR Content LIKE '%$keywords%' OR MetaDescription LIKE '%$keywords%' OR
|
|
Title LIKE '%$htmlEntityKeywords%' OR MenuTitle LIKE '%$htmlEntityKeywords%' OR Content LIKE '%$htmlEntityKeywords%' OR MetaDescription LIKE '%$htmlEntityKeywords%')
|
|
";
|
|
$match['File'] = "(Filename LIKE '%$keywords%' OR Title LIKE '%$keywords%' OR Content LIKE '%$keywords%') AND ClassName = 'File'";
|
|
|
|
// We make the relevance search by converting a boolean mode search into a normal one
|
|
$relevanceKeywords = $keywords;
|
|
$htmlEntityRelevanceKeywords = $htmlEntityKeywords;
|
|
$relevance['SiteTree'] = "(Title LIKE '%$relevanceKeywords%' OR MenuTitle LIKE '%$relevanceKeywords%' OR Content LIKE '%$relevanceKeywords%' OR MetaDescription LIKE '%$relevanceKeywords%') + (Title LIKE '%$htmlEntityRelevanceKeywords%' OR MenuTitle LIKE '%$htmlEntityRelevanceKeywords%' OR Content LIKE '%$htmlEntityRelevanceKeywords%' OR MetaDescription LIKE '%$htmlEntityRelevanceKeywords%')";
|
|
$relevance['File'] = "(Filename LIKE '%$relevanceKeywords%' OR Title LIKE '%$relevanceKeywords%' OR Content LIKE '%$relevanceKeywords%')";
|
|
} else {
|
|
$relevance['SiteTree'] = $relevance['File'] = 1;
|
|
$match['SiteTree'] = $match['File'] = "1 = 1";
|
|
}
|
|
|
|
// Generate initial queries and base table names
|
|
$baseClasses = array('SiteTree' => '', 'File' => '');
|
|
$queries = array();
|
|
foreach($classesToSearch as $class) {
|
|
$queries[$class] = DataList::create($class)->where($notMatch . $match[$class] . $extraFilters[$class], "")->dataQuery()->query();
|
|
$fromArr = $queries[$class]->getFrom();
|
|
$baseClasses[$class] = reset($fromArr);
|
|
}
|
|
|
|
// Make column selection lists
|
|
$select = array(
|
|
'SiteTree' => array(
|
|
"\"ClassName\"",
|
|
"\"ID\"",
|
|
"\"ParentID\"",
|
|
"\"Title\"",
|
|
"\"URLSegment\"",
|
|
"\"Content\"",
|
|
"\"LastEdited\"",
|
|
"\"Created\"",
|
|
"NULL AS \"Filename\"",
|
|
"NULL AS \"Name\"",
|
|
"\"CanViewType\"",
|
|
"$relevance[SiteTree] AS Relevance"
|
|
),
|
|
'File' => array(
|
|
"\"ClassName\"",
|
|
"\"ID\"",
|
|
"NULL AS \"ParentID\"",
|
|
"\"Title\"",
|
|
"NULL AS \"URLSegment\"",
|
|
"\"Content\"",
|
|
"\"LastEdited\"",
|
|
"\"Created\"",
|
|
"\"Filename\"",
|
|
"\"Name\"",
|
|
"NULL AS \"CanViewType\"",
|
|
"$relevance[File] AS Relevance"
|
|
)
|
|
);
|
|
|
|
// Process queries
|
|
foreach($classesToSearch as $class) {
|
|
// There's no need to do all that joining
|
|
$queries[$class]->setFrom($baseClasses[$class]);
|
|
|
|
$queries[$class]->setSelect(array());
|
|
foreach($select[$class] as $clause) {
|
|
if(preg_match('/^(.*) +AS +"?([^"]*)"?/i', $clause, $matches)) {
|
|
$queries[$class]->selectField($matches[1], $matches[2]);
|
|
} else {
|
|
$queries[$class]->selectField(str_replace('"', '', $clause));
|
|
}
|
|
}
|
|
|
|
$queries[$class]->setOrderBy(array());
|
|
}
|
|
|
|
// Combine queries
|
|
$querySQLs = array();
|
|
$totalCount = 0;
|
|
foreach($queries as $query) {
|
|
$querySQLs[] = $query->sql();
|
|
$totalCount += $query->unlimitedRowCount();
|
|
}
|
|
|
|
$fullQuery = implode(" UNION ", $querySQLs) . " ORDER BY $sortBy LIMIT $limit";
|
|
// Get records
|
|
$records = DB::query($fullQuery);
|
|
|
|
foreach($records as $record) {
|
|
$objects[] = new $record['ClassName']($record);
|
|
}
|
|
|
|
if(isset($objects)) $doSet = new ArrayList($objects);
|
|
else $doSet = new ArrayList();
|
|
$list = new PaginatedList($doSet);
|
|
$list->setPageStart($start);
|
|
$list->setPageLEngth($pageLength);
|
|
$list->setTotalItems($totalCount);
|
|
return $list;
|
|
}
|
|
|
|
/*
|
|
* Does this database support transactions?
|
|
*/
|
|
public function supportsTransactions(){
|
|
return version_compare($this->getVersion(), '3.6', '>=');
|
|
}
|
|
|
|
/*
|
|
* This is a quick lookup to discover if the database supports particular extensions
|
|
*/
|
|
public function supportsExtensions($extensions=Array('partitions', 'tablespaces', 'clustering')){
|
|
|
|
if(isset($extensions['partitions']))
|
|
return true;
|
|
elseif(isset($extensions['tablespaces']))
|
|
return true;
|
|
elseif(isset($extensions['clustering']))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @deprecated 1.2 use transactionStart() (method required for 2.4.x)
|
|
*/
|
|
public function startTransaction($transaction_mode=false, $session_characteristics=false){
|
|
$this->transactionStart($transaction_mode, $session_characteristics);
|
|
}
|
|
|
|
/*
|
|
* Start a prepared transaction
|
|
*/
|
|
public function transactionStart($transaction_mode=false, $session_characteristics=false){
|
|
DB::query('BEGIN');
|
|
}
|
|
|
|
/*
|
|
* Create a savepoint that you can jump back to if you encounter problems
|
|
*/
|
|
public function transactionSavepoint($savepoint){
|
|
DB::query("SAVEPOINT \"$savepoint\"");
|
|
}
|
|
|
|
/*
|
|
* Rollback or revert to a savepoint if your queries encounter problems
|
|
* If you encounter a problem at any point during a transaction, you may
|
|
* need to rollback that particular query, or return to a savepoint
|
|
*/
|
|
public function transactionRollback($savepoint=false){
|
|
|
|
if($savepoint) {
|
|
DB::query("ROLLBACK TO $savepoint;");
|
|
} else {
|
|
DB::query('ROLLBACK;');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @deprecated 1.2 use transactionEnd() (method required for 2.4.x)
|
|
*/
|
|
public function endTransaction(){
|
|
$this->transactionEnd();
|
|
}
|
|
|
|
/*
|
|
* Commit everything inside this transaction so far
|
|
*/
|
|
public function transactionEnd(){
|
|
DB::query('COMMIT;');
|
|
}
|
|
|
|
/**
|
|
*
|
|
* This is a stub function. Postgres caches the fieldlist results.
|
|
*
|
|
* @param string $tableName
|
|
*
|
|
* @return boolean
|
|
*/
|
|
function clear_cached_fieldlist($tableName=false){
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Generate a WHERE clause for text matching.
|
|
*
|
|
* @param String $field Quoted field name
|
|
* @param String $value Escaped search. Can include percentage wildcards.
|
|
* @param boolean $exact Exact matches or wildcard support.
|
|
* @param boolean $negate Negate the clause.
|
|
* @param boolean $caseSensitive Enforce case sensitivity if TRUE or FALSE.
|
|
* Stick with default collation if set to NULL.
|
|
* @return String SQL
|
|
*/
|
|
public function comparisonClause($field, $value, $exact = false, $negate = false, $caseSensitive = null) {
|
|
if($exact && !$caseSensitive) {
|
|
$comp = ($negate) ? '!=' : '=';
|
|
} else {
|
|
if($caseSensitive) {
|
|
// GLOB uses asterisks as wildcards.
|
|
// Replace them in search string, without replacing escaped percetage signs.
|
|
$comp = 'GLOB';
|
|
$value = preg_replace('/^%([^\\\\])/', '*$1', $value);
|
|
$value = preg_replace('/([^\\\\])%$/', '$1*', $value);
|
|
$value = preg_replace('/([^\\\\])%/', '$1*', $value);
|
|
} else {
|
|
$comp = 'LIKE';
|
|
}
|
|
if($negate) $comp = 'NOT ' . $comp;
|
|
}
|
|
|
|
return sprintf("%s %s '%s'", $field, $comp, $value);
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression that can be used with SQLite3
|
|
* 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);
|
|
|
|
$translate = array(
|
|
'/%i/' => '%M',
|
|
'/%s/' => '%S',
|
|
'/%U/' => '%s',
|
|
);
|
|
$format = preg_replace(array_keys($translate), array_values($translate), $format);
|
|
|
|
$modifiers = array();
|
|
if($format == '%s' && $date != 'now') $modifiers[] = 'utc';
|
|
if($format != '%s' && $date == 'now') $modifiers[] = 'localtime';
|
|
|
|
if(preg_match('/^now$/i', $date)) {
|
|
$date = "'now'";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date)) {
|
|
$date = "'$date'";
|
|
}
|
|
|
|
$modifier = empty($modifiers) ? '' : ", '" . implode("', '", $modifiers) . "'";
|
|
return "strftime('$format', $date$modifier)";
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression that can be used with SQLite3
|
|
* 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) {
|
|
$modifiers = array();
|
|
if($date == 'now') $modifiers[] = 'localtime';
|
|
|
|
if(preg_match('/^now$/i', $date)) {
|
|
$date = "'now'";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date)) {
|
|
$date = "'$date'";
|
|
}
|
|
|
|
$modifier = empty($modifiers) ? '' : ", '" . implode("', '", $modifiers) . "'";
|
|
return "datetime($date$modifier, '$interval')";
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression that can be used with SQLite3
|
|
* 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) {
|
|
|
|
$modifiers1 = array();
|
|
$modifiers2 = array();
|
|
|
|
if($date1 == 'now') $modifiers1[] = 'localtime';
|
|
if($date2 == 'now') $modifiers2[] = 'localtime';
|
|
|
|
if(preg_match('/^now$/i', $date1)) {
|
|
$date1 = "'now'";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date1)) {
|
|
$date1 = "'$date1'";
|
|
}
|
|
|
|
if(preg_match('/^now$/i', $date2)) {
|
|
$date2 = "'now'";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date2)) {
|
|
$date2 = "'$date2'";
|
|
}
|
|
|
|
$modifier1 = empty($modifiers1) ? '' : ", '" . implode("', '", $modifiers1) . "'";
|
|
$modifier2 = empty($modifiers2) ? '' : ", '" . implode("', '", $modifiers2) . "'";
|
|
|
|
return "strftime('%s', $date1$modifier1) - strftime('%s', $date2$modifier2)";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A result-set from a SQLite3 database.
|
|
* @package SQLite3Database
|
|
*/
|
|
class SQLite3Query extends SS_Query {
|
|
|
|
/**
|
|
* The SQLite3Database object that created this result set.
|
|
* @var SQLite3Database
|
|
*/
|
|
protected $database;
|
|
|
|
/**
|
|
* The internal sqlite3 handle that points to the result set.
|
|
* @var resource
|
|
*/
|
|
protected $handle;
|
|
|
|
/**
|
|
* Hook the result-set given into a Query class, suitable for use by framework.
|
|
* @param database The database object that created this query.
|
|
* @param handle the internal sqlite3 handle that is points to the resultset.
|
|
*/
|
|
public function __construct(SQLite3Database $database, $handle) {
|
|
$this->database = $database;
|
|
$this->handle = $handle;
|
|
}
|
|
|
|
public function __destruct() {
|
|
if($this->handle) {
|
|
$this->handle->finalize();
|
|
}
|
|
}
|
|
|
|
public function seek($row) {
|
|
$this->handle->reset();
|
|
$i=0;
|
|
while($i < $row && $row = @$this->handle->fetchArray()) $i++;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @todo This looks terrible but there is no SQLite3::get_num_rows() implementation
|
|
*/
|
|
public function numRecords() {
|
|
$c=0;
|
|
while($this->handle->fetchArray()) $c++;
|
|
$this->handle->reset();
|
|
return $c;
|
|
}
|
|
|
|
public function nextRecord() {
|
|
if($data = $this->handle->fetchArray(SQLITE3_ASSOC)) {
|
|
return $data;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|