1897 lines
60 KiB
PHP
1897 lines
60 KiB
PHP
<?php
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/**
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* @package sapphire
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* @subpackage model
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*/
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/**
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* PostgreSQL connector class.
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* @package sapphire
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* @subpackage model
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*/
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class PostgreSQLDatabase extends SS_Database {
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/**
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* Connection to the DBMS.
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* @var resource
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*/
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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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* 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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private $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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private $parameters;
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/*
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* These two values describe how T-search will work.
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* You can use either GiST or GIN, and '@@' (gist) or '@@@' (gin)
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* Combinations of these two will also work, so you'll need to pick
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* one which works best for you
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*/
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public $default_fts_cluster_method='GIN';
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public $default_fts_search_method='@@@';
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private $supportsTransactions=true;
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/**
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* Determines whether to check a database exists on the host by
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* querying the 'postgres' database and running createDatabase.
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*
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* Some locked down systems prevent access to the 'postgres' table in
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* which case you need to set this to false.
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*/
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public static $check_database_exists = true;
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/**
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* This holds a copy of all the constraint results that are returned
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* via the function constraintExists(). This is a bit faster than
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* repeatedly querying this column, and should allow the database
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* to use it's built-in caching features for better queries.
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*
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* @var array
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*/
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private static $cached_constraints=array();
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/**
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* Connect to a PostgreSQL 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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//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 $parameters array to connect to a database of a given name
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*/
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function connectDatabase(){
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$parameters=$this->parameters;
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if(!$parameters)
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return false;
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($parameters['username']!='') ? $username=' user=' . $parameters['username'] : $username='';
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($parameters['password']!='') ? $password=' password=' . $parameters['password'] : $password='';
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if(!isset($this->database))
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$dbName=$parameters['database'];
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else $dbName=$this->database;
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$port = empty($parameters['port']) ? 5432 : $parameters['port'];
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// First, we need to check that this database exists. To do this, we will connect to the 'postgres' database first
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// some setups prevent access to this database so set PostgreSQLDatabase::$check_database_exists = false
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if(self::$check_database_exists) {
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$this->dbConn = pg_connect('host=' . $parameters['server'] . ' port=' . $port . ' dbname=postgres' . $username . $password);
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if(!$this->databaseExists($dbName))
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$this->createDatabase($dbName);
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}
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//Now we can be sure that this database exists, so we can connect to it
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$this->dbConn = pg_connect('host=' . $parameters['server'] . ' port=' . $port . ' dbname=' . $dbName . $username . $password);
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//By virtue of getting here, the connection is active:
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$this->active=true;
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$this->database = $dbName;
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if(!$this->dbConn) {
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$this->databaseError("Couldn't connect to PostgreSQL database");
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return false;
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}
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return true;
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}
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/**
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* Not implemented, needed for PDO
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*/
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public function getConnect($parameters) {
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return null;
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}
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/**
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* Return the parameters used to construct this database connection
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*/
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public function getParameters() {
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return $this->parameters;
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}
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/**
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* Returns true if this database supports collations
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* TODO: get rid of this?
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* @return boolean
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*/
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public function supportsCollations() {
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return true;
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}
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/**
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* Get the version of PostgreSQL.
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* @return string
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*/
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public function getVersion() {
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$version = pg_version($this->dbConn);
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if(isset($version['server'])) return $version['server'];
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else return false;
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}
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/**
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* Get the database server, namely PostgreSQL.
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* @return string
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*/
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public function getDatabaseServer() {
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return "postgresql";
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}
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public function query($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 = pg_query($this->dbConn, $sql);
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if(isset($_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 && $errorLevel) $this->databaseError("Couldn't run query: $sql | " . pg_last_error($this->dbConn), $errorLevel);
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return new PostgreSQLQuery($this, $handle);
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}
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public function getGeneratedID($table) {
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$result=DB::query("SELECT last_value FROM \"{$table}_ID_seq\";");
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$row=$result->first();
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return $row['last_value'];
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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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* You can create a database based either on a supplied name, or from whatever is in the $this->database value
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*/
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public function createDatabase($name=false) {
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if(!$name)
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$name=$this->database;
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$this->query("CREATE DATABASE \"$name\";");
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$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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$db_to_drop=$this->database;
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$this->selectDatabase($this->database_original);
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$this->connectDatabase();
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$this->query("DROP DATABASE $db_to_drop");
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}
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/**
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* Drop the database that this object is currently connected to.
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* Use with caution.
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*/
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public function dropDatabaseByName($dbName) {
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if($dbName!=$this->database)
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$this->query("DROP DATABASE \"$dbName\";");
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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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// We have to use addslashes here, since there may not be a database connection to base the Convert::raw2sql
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// function off.
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$SQL_name=addslashes($name);
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return $this->query("SELECT datname FROM pg_database WHERE datname='$SQL_name';")->first() ? true : false;
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}
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/**
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* Returns a column
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*/
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public function allDatabaseNames() {
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return $this->query("SELECT datname FROM pg_database WHERE datistemplate=false;")->column();
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}
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public function createTable($tableName, $fields = null, $indexes = null, $options = null, $extensions = null) {
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$fieldSchemas = $indexSchemas = "";
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if($fields) foreach($fields as $k => $v) $fieldSchemas .= "\"$k\" $v,\n";
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if(isset($this->class)){
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$addOptions = (isset($options[$this->class])) ? $options[$this->class] : null;
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} else $addOptions=null;
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//First of all, does this table already exist
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$doesExist=$this->TableExists($tableName);
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if($doesExist) {
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// Table already exists, just return the name, in line with baseclass documentation.
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return $tableName;
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}
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//If we have a fulltext search request, then we need to create a special column
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//for GiST searches
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$fulltexts='';
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$triggers='';
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if($indexes){
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foreach($indexes as $name=>$this_index){
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if($this_index['type']=='fulltext'){
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$ts_details=$this->fulltext($this_index, $tableName, $name);
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$fulltexts.=$ts_details['fulltexts'] . ', ';
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$triggers.=$ts_details['triggers'];
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}
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}
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}
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if($indexes) foreach($indexes as $k => $v) $indexSchemas .= $this->getIndexSqlDefinition($tableName, $k, $v) . "\n";
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//Do we need to create a tablespace for this item?
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if($extensions && isset($extensions['tablespace'])){
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$this->createOrReplaceTablespace($extensions['tablespace']['name'], $extensions['tablespace']['location']);
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$tableSpace=' TABLESPACE ' . $extensions['tablespace']['name'];
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} else
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$tableSpace='';
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$this->query("CREATE TABLE \"$tableName\" (
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$fieldSchemas
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$fulltexts
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primary key (\"ID\")
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)$tableSpace; $indexSchemas $addOptions");
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if($triggers!=''){
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$this->query($triggers);
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}
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//If we have a partitioning requirement, we do that here:
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if($extensions && isset($extensions['partitions'])){
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$this->createOrReplacePartition($tableName, $extensions['partitions'], $indexes, $extensions);
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}
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//Lastly, clustering goes here:
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if($extensions && isset($extensions['cluster'])){
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DB::query("CLUSTER \"$tableName\" USING \"{$extensions['cluster']}\";");
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}
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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) $alterList[] .= "ADD \"$k\" $v";
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if($alteredFields) {
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foreach($alteredFields as $k => $v) {
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$val=$this->alterTableAlterColumn($tableName, $k, $v);
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if($val!='')
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$alterList[] .= $val;
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}
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}
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//Do we need to do anything with the tablespaces?
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if($alteredOptions && isset($advancedOptions['tablespace'])){
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$this->createOrReplaceTablespace($advancedOptions['tablespace']['name'], $advancedOptions['tablespace']['location']);
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$this->query("ALTER TABLE \"$tableName\" SET TABLESPACE {$advancedOptions['tablespace']['name']};");
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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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//see http://www.postgresql.org/docs/8.1/static/sql-altertable.html
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$alterIndexList=Array();
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//Pick up the altered indexes here:
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$fieldList = $this->fieldList($tableName);
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$fulltexts=false;
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$drop_triggers=false;
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$triggers=false;
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if($alteredIndexes) foreach($alteredIndexes as $key=>$v) {
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//We are only going to delete indexes which exist
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$indexes=$this->indexList($tableName);
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if($v['type']=='fulltext'){
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//For full text indexes, we need to drop the trigger, drop the index, AND drop the column
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//Go and get the tsearch details:
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$ts_details=$this->fulltext($v, $tableName, $key);
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//Drop this column if it already exists:
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//No IF EXISTS option is available for Postgres <9.0
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if(array_key_exists($ts_details['ts_name'], $fieldList)){
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$fulltexts.="ALTER TABLE \"{$tableName}\" DROP COLUMN \"{$ts_details['ts_name']}\";";
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}
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$drop_triggers.= 'DROP TRIGGER IF EXISTS ts_' . strtolower($tableName) . '_' . strtolower($key) . ' ON "' . $tableName . '";';
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$alterIndexList[] = 'DROP INDEX IF EXISTS ix_' . strtolower($tableName) . '_' . strtolower($v['value']) . ';';
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//We'll execute these later:
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$fulltexts.="ALTER TABLE \"{$tableName}\" ADD COLUMN {$ts_details['fulltexts']};";
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$triggers.=$ts_details['triggers'];
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} else {
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if(isset($indexes[$v['value']])){
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if(is_array($v))
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$alterIndexList[] = 'DROP INDEX IF EXISTS ix_' . strtolower($tableName) . '_' . strtolower($v['value']) . ';';
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else
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$alterIndexList[] = 'DROP INDEX IF EXISTS ix_' . strtolower($tableName) . '_' . strtolower(trim($v, '()')) . ';';
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$k=$v['value'];
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$createIndex=$this->getIndexSqlDefinition($tableName, $k, $v);
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if($createIndex!==false)
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$alterIndexList[] .= $createIndex;
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}
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}
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}
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//If we have a fulltext search request, then we need to create a special column
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//for GiST searches
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//Pick up the new indexes here:
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if($newIndexes){
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foreach($newIndexes as $name=>$this_index){
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if($this_index['type']=='fulltext'){
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$ts_details=$this->fulltext($this_index, $tableName, $name);
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if(!isset($fieldList[$ts_details['ts_name']])){
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$fulltexts.="ALTER TABLE \"{$tableName}\" ADD COLUMN {$ts_details['fulltexts']};";
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$triggers.=$ts_details['triggers'];
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}
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}
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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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//Check that this index doesn't already exist:
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$indexes=$this->indexList($tableName);
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if(!is_array($v)){
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$name=trim($v, '()');
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} else {
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$name=(isset($v['name'])) ? $v['name'] : $k;
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}
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if(isset($indexes[$name])){
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if(is_array($v)){
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$alterIndexList[] = 'DROP INDEX IF EXISTS ix_' . strtolower($tableName) . '_' . strtolower($v['value']) . ';';
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} else {
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$alterIndexList[] = 'DROP INDEX IF EXISTS ' . $indexes[$name]['indexname'] . ';';
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}
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}
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$createIndex=$this->getIndexSqlDefinition($tableName, $k, $v);
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if($createIndex!==false)
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$alterIndexList[] = $createIndex;
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}
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if($alterList) {
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$alterations = implode(",\n", $alterList);
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$this->query("ALTER TABLE \"$tableName\" " . $alterations);
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}
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//Do we need to create a tablespace for this item?
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if($advancedOptions && isset($advancedOptions['extensions']['tablespace'])){
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$extensions=$advancedOptions['extensions'];
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$this->createOrReplaceTablespace($extensions['tablespace']['name'], $extensions['tablespace']['location']);
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}
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if($alteredOptions && isset($this->class) && isset($alteredOptions[$this->class])) {
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$this->query(sprintf("ALTER TABLE \"%s\" %s", $tableName, $alteredOptions[$this->class]));
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Database::alteration_message(
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sprintf("Table %s options changed: %s", $tableName, $alteredOptions[$this->class]),
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"changed"
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);
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}
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//Create any fulltext columns and triggers here:
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if($fulltexts)
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$this->query($fulltexts);
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if($drop_triggers)
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$this->query($drop_triggers);
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if($triggers) {
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$this->query($triggers);
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$triggerbits=explode(';', $triggers);
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foreach($triggerbits as $trigger){
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$trigger_fields=$this->triggerFieldsFromTrigger($trigger);
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if($trigger_fields){
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//We need to run a simple query to force the database to update the triggered columns
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$this->query("UPDATE \"{$tableName}\" SET \"{$trigger_fields[0]}\"=\"$trigger_fields[0]\";");
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}
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}
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}
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foreach($alterIndexList as $alteration)
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$this->query($alteration);
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//If we have a partitioning requirement, we do that here:
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if($advancedOptions && isset($advancedOptions['partitions'])){
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$this->createOrReplacePartition($tableName, $advancedOptions['partitions']);
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}
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|
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//Lastly, clustering goes here:
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if($advancedOptions && isset($advancedOptions['cluster'])){
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DB::query("CLUSTER \"$tableName\" USING ix_{$tableName}_{$advancedOptions['cluster']};");
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} else {
|
|
//Check that clustering is not on this table, and if it is, remove it:
|
|
|
|
//This is really annoying. We need the oid of this table:
|
|
$stats=DB::query("SELECT relid FROM pg_stat_user_tables WHERE relname='$tableName';")->first();
|
|
$oid=$stats['relid'];
|
|
|
|
//Now we can run a long query to get the clustered status:
|
|
//If anyone knows a better way to get the clustered status, then feel free to replace this!
|
|
$clustered=DB::query("SELECT c2.relname, i.indisclustered FROM pg_catalog.pg_class c, pg_catalog.pg_class c2, pg_catalog.pg_index i WHERE c.oid = '$oid' AND c.oid = i.indrelid AND i.indexrelid = c2.oid AND indisclustered='t';")->first();
|
|
|
|
if($clustered)
|
|
DB::query("ALTER TABLE \"$tableName\" SET WITHOUT CLUSTER;");
|
|
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Creates an ALTER expression for a column in PostgreSQL
|
|
*
|
|
* @param $tableName Name of the table to be altered
|
|
* @param $colName Name of the column to be altered
|
|
* @param $colSpec String which contains conditions for a column
|
|
* @return string
|
|
*/
|
|
private function alterTableAlterColumn($tableName, $colName, $colSpec){
|
|
// First, we split the column specifications into parts
|
|
// TODO: this returns an empty array for the following string: int(11) not null auto_increment
|
|
// on second thoughts, why is an auto_increment field being passed through?
|
|
$pattern = '/^([\w()]+)\s?((?:not\s)?null)?\s?(default\s[\w\']+)?\s?(check\s[\w()\'",\s]+)?$/i';
|
|
preg_match($pattern, $colSpec, $matches);
|
|
|
|
if(sizeof($matches)==0)
|
|
return '';
|
|
|
|
if($matches[1]=='serial8')
|
|
return '';
|
|
|
|
if(isset($matches[1])) {
|
|
$alterCol = "ALTER COLUMN \"$colName\" TYPE $matches[1]\n";
|
|
|
|
// SET null / not null
|
|
if(!empty($matches[2])) $alterCol .= ",\nALTER COLUMN \"$colName\" SET $matches[2]";
|
|
|
|
// SET default (we drop it first, for reasons of precaution)
|
|
if(!empty($matches[3])) {
|
|
$alterCol .= ",\nALTER COLUMN \"$colName\" DROP DEFAULT";
|
|
$alterCol .= ",\nALTER COLUMN \"$colName\" SET $matches[3]";
|
|
}
|
|
|
|
// SET check constraint (The constraint HAS to be dropped)
|
|
$existing_constraint=$this->query("SELECT conname FROM pg_constraint WHERE conname='{$tableName}_{$colName}_check';")->value();
|
|
//If you run into constraint row violation conflicts, here's how to reset it:
|
|
//alter table "SiteTree" drop constraint "SiteTree_ClassName_check";
|
|
//update "SiteTree" set "ClassName"='NewValue' WHERE "ClassName"='OldValue';
|
|
//Repeat this for _Live and for _versions
|
|
|
|
//First, delete any existing constraint on this column, even if it's no longer an enum
|
|
if($existing_constraint)
|
|
$alterCol .= ",\nDROP CONSTRAINT \"{$tableName}_{$colName}_check\"";
|
|
|
|
//Now create the constraint (if we've asked for one)
|
|
if(!empty($matches[4]))
|
|
$alterCol .= ",\nADD CONSTRAINT \"{$tableName}_{$colName}_check\" $matches[4]";
|
|
}
|
|
|
|
return isset($alterCol) ? $alterCol : '';
|
|
}
|
|
|
|
public function renameTable($oldTableName, $newTableName) {
|
|
$this->query("ALTER TABLE \"$oldTableName\" RENAME TO \"$newTableName\"");
|
|
}
|
|
|
|
/**
|
|
* Repairs and reindexes the table. This might take a long time on a very large table.
|
|
* @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) {
|
|
$this->runTableCheckCommand("VACUUM FULL ANALYZE \"$tableName\"");
|
|
$this->runTableCheckCommand("REINDEX TABLE \"$tableName\"");
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Helper function used by checkAndRepairTable.
|
|
* @param string $sql Query to run.
|
|
* @return boolean Returns true no matter what; we're not currently checking the status of the command
|
|
*/
|
|
protected function runTableCheckCommand($sql) {
|
|
$testResults = $this->query($sql);
|
|
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)) {
|
|
$this->query("ALTER TABLE \"$tableName\" RENAME COLUMN \"$oldName\" TO \"$newName\"");
|
|
}
|
|
}
|
|
|
|
public function fieldList($table) {
|
|
//Query from http://www.alberton.info/postgresql_meta_info.html
|
|
//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 $field) {
|
|
|
|
switch($field['data_type']){
|
|
case 'character varying':
|
|
//Check to see if there's a constraint attached to this column:
|
|
//$constraint=$this->query("SELECT conname,pg_catalog.pg_get_constraintdef(r.oid, true) FROM pg_catalog.pg_constraint r WHERE r.contype = 'c' AND conname='" . $table . '_' . $field['column_name'] . "_check' ORDER BY 1;")->first();
|
|
$constraint=$this->constraintExists($table . '_' . $field['column_name'] . '_check');
|
|
$enum='';
|
|
if($constraint){
|
|
//Now we need to break this constraint text into bits so we can see what we have:
|
|
//Examples:
|
|
//CHECK ("CanEditType"::text = ANY (ARRAY['LoggedInUsers'::character varying, 'OnlyTheseUsers'::character varying, 'Inherit'::character varying]::text[]))
|
|
//CHECK ("ClassName"::text = 'PageComment'::text)
|
|
|
|
//TODO: replace all this with a regular expression!
|
|
$value=$constraint['pg_get_constraintdef'];
|
|
$value=substr($value, strpos($value,'='));
|
|
$value=str_replace("''", "'", $value);
|
|
|
|
$in_value=false;
|
|
$constraints=Array();
|
|
$current_value='';
|
|
for($i=0; $i<strlen($value); $i++){
|
|
$char=substr($value, $i, 1);
|
|
if($in_value)
|
|
$current_value.=$char;
|
|
|
|
if($char=="'"){
|
|
if(!$in_value)
|
|
$in_value=true;
|
|
else {
|
|
$in_value=false;
|
|
$constraints[]=substr($current_value, 0, -1);
|
|
$current_value='';
|
|
}
|
|
}
|
|
}
|
|
|
|
if(sizeof($constraints)>0){
|
|
//Get the default:
|
|
$default=trim(substr($field['column_default'], 0, strpos($field['column_default'], '::')), "'");
|
|
$output[$field['column_name']]=$this->enum(Array('default'=>$default, 'name'=>$field['column_name'], 'enums'=>$constraints));
|
|
}
|
|
} else{
|
|
$output[$field['column_name']]='varchar(' . $field['character_maximum_length'] . ')';
|
|
}
|
|
break;
|
|
|
|
case 'numeric':
|
|
$output[$field['column_name']]='decimal(' . $field['numeric_precision'] . ',' . $field['numeric_scale'] . ') default ' . $field['column_default'];
|
|
break;
|
|
|
|
case 'integer':
|
|
$output[$field['column_name']]='integer default ' . $field['column_default'];
|
|
break;
|
|
|
|
case 'timestamp without time zone':
|
|
$output[$field['column_name']]='timestamp';
|
|
break;
|
|
|
|
case 'smallint':
|
|
$output[$field['column_name']]='smallint default ' . $field['column_default'];
|
|
break;
|
|
|
|
case 'time without time zone':
|
|
$output[$field['column_name']]='time';
|
|
break;
|
|
|
|
case 'double precision':
|
|
$output[$field['column_name']]='float';
|
|
break;
|
|
|
|
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) {
|
|
$createIndex=$this->getIndexSqlDefinition($tableName, $indexName, $indexSpec);
|
|
if($createIndex!==false)
|
|
$this->query();
|
|
}
|
|
|
|
/*
|
|
* 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, $asDbValue=false, $table=''){
|
|
|
|
if(!$asDbValue){
|
|
if(is_array($indexSpec)){
|
|
//Here we create a db-specific version of whatever index we need to create.
|
|
switch($indexSpec['type']){
|
|
case 'fulltext':
|
|
//We need to include the fields so if we change the columns it's indexing, but not the name,
|
|
//then the change will be picked up.
|
|
$indexSpec='(ts_' . $indexSpec['name'] . '_' . $indexSpec['value'] . ')';
|
|
break;
|
|
case 'unique':
|
|
$indexSpec='unique (' . $indexSpec['value'] . ')';
|
|
break;
|
|
case 'hash':
|
|
$indexSpec='(' . $indexSpec['value'] . ')';
|
|
break;
|
|
case 'index':
|
|
//The default index is 'btree', which we'll use by default (below):
|
|
default:
|
|
$indexSpec='(' . $indexSpec['value'] . ')';
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
$indexSpec='ix_' . $table . '_' . $indexSpec;
|
|
}
|
|
return $indexSpec;
|
|
}
|
|
|
|
protected function getIndexSqlDefinition($tableName, $indexName, $indexSpec, $asDbValue=false) {
|
|
|
|
//TODO: create table partition support
|
|
//TODO: create clustering options
|
|
|
|
//NOTE: it is possible for *_renamed tables to have indexes whose names are not updates
|
|
//Therefore, we now check for the existance of indexes before we create them.
|
|
//This is techically a bug, since new tables will not be indexed.
|
|
|
|
if(!$asDbValue){
|
|
|
|
$tableCol= 'ix_' . $tableName . '_' . $indexName;
|
|
if(strlen($tableCol)>64){
|
|
$tableCol=substr($indexName, 0, 59) . rand(1000, 9999);
|
|
}
|
|
|
|
//It is possible to specify indexes through strings:
|
|
if(!is_array($indexSpec)){
|
|
$indexSpec=trim($indexSpec, '()');
|
|
$bits=explode(',', $indexSpec);
|
|
$indexes="\"" . implode("\",\"", $bits) . "\"";
|
|
|
|
//One last check:
|
|
$existing=DB::query("SELECT tablename FROM pg_indexes WHERE indexname='" . strtolower($tableCol) . "';")->first();
|
|
if(!$existing)
|
|
return "create index $tableCol ON \"" . $tableName . "\" (" . $indexes . ");";
|
|
else
|
|
return false;
|
|
} else {
|
|
|
|
//Arrays offer much more flexibility and many more options:
|
|
|
|
//Misc options first:
|
|
$fillfactor=$where='';
|
|
if(isset($indexSpec['fillfactor']))
|
|
$fillfactor='WITH (FILLFACTOR = ' . $indexSpec['fillfactor'] . ')';
|
|
if(isset($indexSpec['where']))
|
|
$where='WHERE ' . $indexSpec['where'];
|
|
|
|
//Fix up the value entry to be quoted:
|
|
$value_bits=explode(',', $indexSpec['value']);
|
|
$new_values=Array();
|
|
foreach($value_bits as $value){
|
|
$new_values[]="\"" . trim($value, ' "') . "\"";
|
|
}
|
|
$indexSpec['value']=implode(',', $new_values);
|
|
|
|
//One last check:
|
|
$existing=DB::query("SELECT tablename FROM pg_indexes WHERE indexname='" . strtolower($tableCol) . "';");
|
|
if(!$existing->first()){
|
|
//create a type-specific index
|
|
//NOTE: hash should be removed. This is only here to demonstrate how other indexes can be made
|
|
switch($indexSpec['type']){
|
|
case 'fulltext':
|
|
$spec="create index $tableCol ON \"" . $tableName . "\" USING " . $this->default_fts_cluster_method . "(\"ts_" . $indexName . "\") $fillfactor $where";
|
|
break;
|
|
|
|
case 'unique':
|
|
$spec="create unique index $tableCol ON \"" . $tableName . "\" (" . $indexSpec['value'] . ") $fillfactor $where";
|
|
break;
|
|
|
|
case 'btree':
|
|
$spec="create index $tableCol ON \"" . $tableName . "\" USING btree (" . $indexSpec['value'] . ") $fillfactor $where";
|
|
break;
|
|
|
|
case 'hash':
|
|
//NOTE: this is not a recommended index type
|
|
$spec="create index $tableCol ON \"" . $tableName . "\" USING hash (" . $indexSpec['value'] . ") $fillfactor $where";
|
|
break;
|
|
|
|
case 'index':
|
|
//'index' is the same as default, just a normal index with the default type decided by the database.
|
|
default:
|
|
$spec="create index $tableCol ON \"" . $tableName . "\" (" . $indexSpec['value'] . ") $fillfactor $where";
|
|
}
|
|
|
|
return trim($spec) . ';';
|
|
} else {
|
|
|
|
return false;
|
|
}
|
|
}
|
|
} else {
|
|
$indexName=trim($indexName, '()');
|
|
return $indexName;
|
|
}
|
|
}
|
|
|
|
function getDbSqlDefinition($tableName, $indexName, $indexSpec){
|
|
return $this->getIndexSqlDefinition($tableName, $indexName, $indexSpec, true);
|
|
}
|
|
|
|
/**
|
|
* 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");
|
|
$this->query("ALTER TABLE \"$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) {
|
|
|
|
//Retrieve a list of indexes for the specified table
|
|
$indexes=DB::query("SELECT tablename, indexname, indexdef FROM pg_indexes WHERE tablename='$table';");
|
|
|
|
$indexList=Array();
|
|
foreach($indexes as $index) {
|
|
//We don't actually need the entire created command, just a few bits:
|
|
$prefix='';
|
|
|
|
//Check for uniques:
|
|
if(substr($index['indexdef'], 0, 13)=='CREATE UNIQUE')
|
|
$prefix='unique ';
|
|
|
|
//check for hashes, btrees etc:
|
|
if(strpos(strtolower($index['indexdef']), 'using hash ')!==false)
|
|
$prefix='using hash ';
|
|
|
|
//TODO: Fix me: btree is the default index type:
|
|
//if(strpos(strtolower($index['indexdef']), 'using btree ')!==false)
|
|
// $prefix='using btree ';
|
|
|
|
if(strpos(strtolower($index['indexdef']), 'using rtree ')!==false)
|
|
$prefix='using rtree ';
|
|
|
|
$value=explode(' ', substr($index['indexdef'], strpos($index['indexdef'], ' USING ')+7));
|
|
|
|
if(sizeof($value)>2){
|
|
for($i=2; $i<sizeof($value); $i++)
|
|
$value[1].=$value[$i];
|
|
}
|
|
|
|
$key=substr($value[1], 0, strpos($value[1], ')'));
|
|
$key=trim(trim(str_replace("\"", '', $key), '()'));
|
|
$indexList[$key]['indexname']=$index['indexname'];
|
|
$indexList[$key]['spec']=$prefix . '(' . $key . ')';
|
|
|
|
}
|
|
|
|
return isset($indexList) ? $indexList : null;
|
|
|
|
}
|
|
|
|
/**
|
|
* Returns a list of all the tables in the database.
|
|
* Table names will all be in lowercase.
|
|
* @return array
|
|
*/
|
|
public function tableList() {
|
|
foreach($this->query("SELECT tablename FROM pg_tables WHERE tablename NOT ILIKE 'pg_%' AND tablename NOT ILIKE 'sql_%'") as $record) {
|
|
//$table = strtolower(reset($record));
|
|
$table = reset($record);
|
|
$tables[$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 tablename FROM pg_tables WHERE tablename='$tableName';")->first();
|
|
|
|
if($result)
|
|
return true;
|
|
else
|
|
return false;
|
|
|
|
}
|
|
|
|
/**
|
|
* Find out what the constraint information is, given a constraint name.
|
|
* We also cache this result, so the next time we don't need to do a
|
|
* query all over again.
|
|
*
|
|
* @param string $constraint
|
|
*/
|
|
function constraintExists($constraint){
|
|
if(!isset(self::$cached_constraints[$constraint])){
|
|
$exists=DB::query("SELECT conname,pg_catalog.pg_get_constraintdef(r.oid, true) FROM pg_catalog.pg_constraint r WHERE r.contype = 'c' AND conname='$constraint' ORDER BY 1;")->first();
|
|
self::$cached_constraints[$constraint]=$exists;
|
|
}
|
|
|
|
return self::$cached_constraints[$constraint];
|
|
}
|
|
|
|
/**
|
|
* Return the number of rows affected by the previous operation.
|
|
* @return int
|
|
*/
|
|
public function affectedRows() {
|
|
return pg_affected_rows(DB::$lastQuery);
|
|
}
|
|
|
|
/**
|
|
* A function to return the field names and datatypes for the particular table
|
|
*/
|
|
public function tableDetails($tableName){
|
|
$query="SELECT a.attname as \"Column\", pg_catalog.format_type(a.atttypid, a.atttypmod) as \"Datatype\" FROM pg_catalog.pg_attribute a WHERE a.attnum > 0 AND NOT a.attisdropped AND a.attrelid = ( SELECT c.oid FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE c.relname ~ '^($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 $table;
|
|
}
|
|
|
|
/**
|
|
* Pass a legit trigger name and it will be dropped
|
|
* This assumes that the trigger has been named in a unique fashion
|
|
*/
|
|
function dropTrigger($triggerName, $tableName){
|
|
$exists=DB::query("SELECT tgname FROM pg_trigger WHERE tgname='$triggerName';")->first();
|
|
if($exists){
|
|
DB::query("DROP trigger $triggerName ON \"$tableName\";");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This will return the fields that the trigger is monitoring
|
|
* @param string $trigger
|
|
*
|
|
* @return array
|
|
*/
|
|
function triggerFieldsFromTrigger($trigger){
|
|
|
|
if($trigger){
|
|
$tsvector='tsvector_update_trigger';
|
|
$ts_pos=strpos($trigger, $tsvector);
|
|
$details=trim(substr($trigger, $ts_pos+strlen($tsvector)), '();');
|
|
//Now split this into bits:
|
|
$bits=explode(',', $details);
|
|
|
|
$fields=$bits[2];
|
|
|
|
$field_bits=explode(',', str_replace('"', '', $fields));
|
|
$result=array();
|
|
foreach($field_bits as $field_bit)
|
|
$result[]=trim($field_bit);
|
|
|
|
return $result;
|
|
} else
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
//Annoyingly, we need to do a good ol' fashioned switch here:
|
|
($values['default']) ? $default='1' : $default='0';
|
|
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'smallint');
|
|
else {
|
|
if($values['arrayValue']!='')
|
|
$default='';
|
|
else
|
|
$default=' default ' . (int)$values['default'];
|
|
|
|
return "smallint{$values['arrayValue']}" . $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){
|
|
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
return "date{$values['arrayValue']}";
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
// Avoid empty strings being put in the db
|
|
if($values['precision'] == '') {
|
|
$precision = 1;
|
|
} else {
|
|
$precision = $values['precision'];
|
|
}
|
|
|
|
$defaultValue = '';
|
|
if(isset($values['default']) && is_numeric($values['default'])) {
|
|
$defaultValue = ' default ' . $values['default'];
|
|
}
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'numeric', 'precision'=>$precision);
|
|
else return "decimal($precision){$values['arrayValue']}$defaultValue";
|
|
}
|
|
|
|
/**
|
|
* Return a enum type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function enum($values){
|
|
//Enums are a bit different. We'll be creating a varchar(255) with a constraint of all the usual enum options.
|
|
//NOTE: In this one instance, we are including the table name in the values array
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
if($values['arrayValue']!='')
|
|
$default='';
|
|
else
|
|
$default=" default '{$values['default']}'";
|
|
|
|
return "varchar(255){$values['arrayValue']}" . $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, $asDbValue=false){
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'double precision');
|
|
else return "float{$values['arrayValue']}";
|
|
}
|
|
|
|
/**
|
|
* Return a float type-formatted string cause double is not supported
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function double($values, $asDbValue=false){
|
|
return $this->float($values, $asDbValue);
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'integer', 'precision'=>'32');
|
|
else {
|
|
if($values['arrayValue']!='')
|
|
$default='';
|
|
else
|
|
$default=' default ' . (int)$values['default'];
|
|
|
|
return "integer{$values['arrayValue']}" . $default;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a datetime type-formatted string
|
|
* For PostgreSQL, we simply return the word 'timestamp', no other parameters are necessary
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function SS_Datetime($values, $asDbValue=false){
|
|
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'timestamp without time zone');
|
|
else
|
|
return "timestamp{$values['arrayValue']}";
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'text');
|
|
else
|
|
return "text{$values['arrayValue']}";
|
|
}
|
|
|
|
/**
|
|
* 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){
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
return "time{$values['arrayValue']}";
|
|
}
|
|
|
|
/**
|
|
* 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, $asDbValue=false){
|
|
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
if(!isset($values['precision']))
|
|
$values['precision']=255;
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'varchar', 'precision'=>$values['precision']);
|
|
else
|
|
return "varchar({$values['precision']}){$values['arrayValue']}";
|
|
}
|
|
|
|
/*
|
|
* Return a 4 digit numeric type. MySQL has a proprietary 'Year' type.
|
|
* For Postgres, we'll use a 4 digit numeric
|
|
*/
|
|
public function year($values, $asDbValue=false){
|
|
|
|
if(!isset($values['arrayValue']))
|
|
$values['arrayValue']='';
|
|
|
|
if($asDbValue)
|
|
return Array('data_type'=>'numeric', 'precision'=>'4');
|
|
else return "numeric(4){$values['arrayValue']}";
|
|
}
|
|
|
|
function escape_character($escape=false){
|
|
if($escape)
|
|
return "\\\"";
|
|
else
|
|
return "\"";
|
|
}
|
|
|
|
/**
|
|
* Create a fulltext search datatype for PostgreSQL
|
|
* This will also return a trigger to be applied to this table
|
|
*
|
|
* @todo: create custom functions to allow weighted searches
|
|
*
|
|
* @param array $spec
|
|
*/
|
|
function fulltext($this_index, $tableName, $name){
|
|
//For full text search, we need to create a column for the index
|
|
$columns=explode(',', $this_index['value']);
|
|
for($i=0; $i<sizeof($columns);$i++)
|
|
$columns[$i]="\"" . trim($columns[$i]) . "\"";
|
|
|
|
$columns=implode(', ', $columns);
|
|
|
|
$fulltexts="\"ts_$name\" tsvector";
|
|
$triggerName="ts_{$tableName}_{$name}";
|
|
|
|
$this->dropTrigger($triggerName, $tableName);
|
|
$triggers="CREATE TRIGGER $triggerName BEFORE INSERT OR UPDATE
|
|
ON \"$tableName\" FOR EACH ROW EXECUTE PROCEDURE
|
|
tsvector_update_trigger(\"ts_$name\", 'pg_catalog.english', $columns);";
|
|
|
|
return Array('name'=>$name, 'ts_name'=>"ts_{$name}", 'fulltexts'=>$fulltexts, 'triggers'=>$triggers);
|
|
}
|
|
|
|
/**
|
|
* This returns the column which is the primary key for each table
|
|
* In Postgres, it is a SERIAL8, which is the equivalent of an auto_increment
|
|
*
|
|
* @return string
|
|
*/
|
|
function IdColumn($asDbValue=false){
|
|
if($asDbValue)
|
|
return 'bigint';
|
|
else return 'serial8 not null';
|
|
}
|
|
|
|
/**
|
|
* Returns true if this table exists
|
|
*/
|
|
function hasTable($tableName) {
|
|
$result = $this->query("SELECT tablename FROM pg_tables WHERE tablename = '$tableName'");
|
|
if ($result->numRecords() > 0) return true;
|
|
else return false;
|
|
}
|
|
|
|
/**
|
|
* Returns the SQL command to get all the tables in this database
|
|
*/
|
|
function allTablesSQL(){
|
|
return "SELECT table_name FROM information_schema.tables WHERE table_schema='public' AND table_type='BASE TABLE';";
|
|
}
|
|
|
|
/**
|
|
* Return enum values for the given field
|
|
* @todo Make a proper implementation
|
|
*/
|
|
function enumValuesForField($tableName, $fieldName) {
|
|
//return array('SiteTree','Page');
|
|
$constraints=$this->constraintExists("{$tableName}_{$fieldName}_check");
|
|
$classes=Array();
|
|
if($constraints)
|
|
$classes=$this->EnumValuesFromConstraint($constraints['pg_get_constraintdef']);
|
|
|
|
return $classes;
|
|
}
|
|
|
|
/**
|
|
* Get the actual enum fields from the constraint value:
|
|
*/
|
|
private function EnumValuesFromConstraint($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 $constraints;
|
|
}
|
|
|
|
/**
|
|
* Because NOW() doesn't always work...
|
|
* MSSQL, I'm looking at you
|
|
*
|
|
*/
|
|
function now(){
|
|
return 'NOW()';
|
|
}
|
|
|
|
/*
|
|
* Returns the database-specific version of the random() function
|
|
*/
|
|
function random(){
|
|
return 'RANDOM()';
|
|
}
|
|
|
|
/*
|
|
* This is a lookup table for data types.
|
|
* For instance, Postgres uses 'INT', while MySQL uses 'UNSIGNED'
|
|
* So this is a DB-specific list of equivilents.
|
|
*/
|
|
function dbDataType($type){
|
|
$values=Array(
|
|
'unsigned integer'=>'INT'
|
|
);
|
|
|
|
if(isset($values[$type]))
|
|
return $values[$type];
|
|
else return '';
|
|
}
|
|
|
|
/**
|
|
* Convert a SQLQuery object into a SQL statement
|
|
* @todo There is a lot of duplication between this and MySQLDatabase::sqlQueryToString(). Perhaps they could both call a common
|
|
* helper function in Database?
|
|
*/
|
|
public function sqlQueryToString(SQLQuery $sqlQuery) {
|
|
if (!$sqlQuery->from) return '';
|
|
$distinct = $sqlQuery->distinct ? "DISTINCT " : "";
|
|
if($sqlQuery->delete) {
|
|
$text = "DELETE ";
|
|
} else if($sqlQuery->select) {
|
|
$text = "SELECT $distinct" . 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 ( ", $sqlQuery->having) . " )";
|
|
if($sqlQuery->orderby) $text .= " ORDER BY " . $this->orderMoreSpecifically($sqlQuery->select,$sqlQuery->orderby);
|
|
|
|
if($sqlQuery->limit) {
|
|
$limit = $sqlQuery->limit;
|
|
|
|
// Pass limit as array or SQL string value
|
|
if(is_array($limit)) {
|
|
|
|
if(isset($limit['start']) && $limit['start']!='')
|
|
$text.=' OFFSET ' . $limit['start'];
|
|
if(isset($limit['limit']) && $limit['limit']!='')
|
|
$text.=' LIMIT ' . $limit['limit'];
|
|
|
|
} else {
|
|
if(strpos($sqlQuery->limit, ',')){
|
|
$limit=str_replace(',', ' LIMIT ', $sqlQuery->limit);
|
|
$text .= ' OFFSET ' . $limit;
|
|
} else {
|
|
$text.=' LIMIT ' . $sqlQuery->limit;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $text;
|
|
}
|
|
|
|
protected function orderMoreSpecifically($select,$order) {
|
|
|
|
$altered = false;
|
|
|
|
// split expression into order terms
|
|
$terms = explode(',', $order);
|
|
|
|
foreach($terms as $i => $term) {
|
|
$term = trim($term);
|
|
|
|
// check if table is unspecified
|
|
if(!preg_match('/\./', $term)) {
|
|
$direction = '';
|
|
if(preg_match('/( ASC)$|( DESC)$/i',$term)) list($term,$direction) = explode(' ', $term);
|
|
|
|
// find a match in the SELECT array and replace
|
|
foreach($select as $s) {
|
|
if(preg_match('/"[a-z0-9_]+"\.[\'"]' . $term . '[\'"]/i', trim($s))) {
|
|
$terms[$i] = $s . ' ' . $direction;
|
|
$altered = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return implode(',', $terms);
|
|
}
|
|
|
|
/*
|
|
* This will return text which has been escaped in a database-friendly manner
|
|
* Using PHP's addslashes method won't work in MSSQL
|
|
*/
|
|
function addslashes($value){
|
|
return pg_escape_string($value);
|
|
}
|
|
|
|
/*
|
|
* This changes the index name depending on database requirements.
|
|
*/
|
|
function modifyIndex($index, $spec){
|
|
|
|
if(is_array($spec) && $spec['type']=='fulltext')
|
|
return 'ts_' . str_replace(',', '_', $index);
|
|
else
|
|
return str_replace('_', ',', $index);
|
|
|
|
}
|
|
|
|
/**
|
|
* The core search engine configuration.
|
|
* @todo Properly extract the search functions out of the core.
|
|
*
|
|
* @param string $keywords Keywords as a space separated string
|
|
* @return object DataObjectSet of result pages
|
|
*/
|
|
public function searchEngine($classesToSearch, $keywords, $start, $pageLength, $sortBy = "ts_rank DESC", $extraFilter = "", $booleanSearch = false, $alternativeFileFilter = "", $invertedMatch = false) {
|
|
|
|
//Fix the keywords to be ts_query compatitble:
|
|
//Spaces must have pipes
|
|
//@TODO: properly handle boolean operators here.
|
|
$keywords=trim($keywords);
|
|
$keywords=str_replace(' ', ' | ', $keywords);
|
|
$keywords=str_replace('"', "'", $keywords);
|
|
|
|
$keywords = Convert::raw2sql(trim($keywords));
|
|
$htmlEntityKeywords = htmlentities($keywords, ENT_NOQUOTES);
|
|
|
|
//We can get a list of all the tsvector columns though this query:
|
|
//We know what tables to search in based on the $classesToSearch variable:
|
|
$result=DB::query("SELECT table_name, column_name, data_type FROM information_schema.columns WHERE data_type='tsvector' AND table_name in ('" . implode("', '", $classesToSearch) . "');");
|
|
if (!$result->numRecords()) throw new Exception('there are no full text columns to search');
|
|
|
|
$tables=Array();
|
|
|
|
// Make column selection lists
|
|
$select = array(
|
|
'SiteTree' => array("\"ClassName\"","\"SiteTree\".\"ID\"","\"ParentID\"","\"Title\"","\"URLSegment\"","\"Content\"","\"LastEdited\"","\"Created\"","NULL AS \"Filename\"", "NULL AS \"Name\"", "\"CanViewType\""),
|
|
'File' => array("\"ClassName\"","\"File\".\"ID\"","NULL AS \"ParentID\"","\"Title\"","NULL AS \"URLSegment\"","\"Content\"","\"LastEdited\"","\"Created\"","\"Filename\"","\"Name\"", "NULL AS \"CanViewType\""),
|
|
);
|
|
|
|
foreach($result as $row){
|
|
if($row['table_name']=='SiteTree')
|
|
$showInSearch="AND \"ShowInSearch\"=1 ";
|
|
else
|
|
$showInSearch='';
|
|
|
|
//public function extendedSQL($filter = "", $sort = "", $limit = "", $join = "", $having = ""){
|
|
$query=singleton($row['table_name'])->extendedSql("\"" . $row['table_name'] . "\".\"" . $row['column_name'] . "\" " . $this->default_fts_search_method . ' q ' . $showInSearch, '');
|
|
|
|
|
|
$query->select=$select[$row['table_name']];
|
|
$query->from['tsearch']=", to_tsquery('english', '$keywords') AS q";
|
|
|
|
$query->select[]="ts_rank(\"{$row['table_name']}\".\"{$row['column_name']}\", q) AS \"Relevance\"";
|
|
|
|
$query->orderby=null;
|
|
|
|
//Add this query to the collection
|
|
$tables[] = $query->sql();
|
|
}
|
|
|
|
$doSet=new DataObjectSet();
|
|
|
|
$limit=$pageLength;
|
|
$offset=$start;
|
|
|
|
if($keywords)
|
|
$orderBy=" ORDER BY $sortBy";
|
|
else $orderBy='';
|
|
|
|
$fullQuery = "SELECT * FROM (" . implode(" UNION ", $tables) . ") AS q1 $orderBy LIMIT $limit OFFSET $offset";
|
|
|
|
// Get records
|
|
$records = DB::query($fullQuery);
|
|
$totalCount=0;
|
|
foreach($records as $record){
|
|
$objects[] = new $record['ClassName']($record);
|
|
$totalCount++;
|
|
}
|
|
if(isset($objects)) $doSet = new DataObjectSet($objects);
|
|
else $doSet = new DataObjectSet();
|
|
|
|
$doSet->setPageLimits($start, $pageLength, $totalCount);
|
|
return $doSet;
|
|
|
|
|
|
}
|
|
|
|
/*
|
|
* Does this database support transactions?
|
|
*/
|
|
public function supportsTransactions(){
|
|
return $this->supportsTransactions;
|
|
}
|
|
|
|
/*
|
|
* This is a quick lookup to discover if the database supports particular extensions
|
|
*/
|
|
public function supportsExtensions($extensions=Array('partitions', 'tablespaces', 'clustering')){
|
|
if(isset($extensions['partitions']))
|
|
return true;
|
|
elseif(isset($extensions['tablespaces']))
|
|
return true;
|
|
elseif(isset($extensions['clustering']))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Start a prepared transaction
|
|
* See http://developer.postgresql.org/pgdocs/postgres/sql-set-transaction.html for details on transaction isolation options
|
|
*/
|
|
public function startTransaction($transaction_mode=false, $session_characteristics=false){
|
|
DB::query('BEGIN;');
|
|
|
|
if($transaction_mode)
|
|
DB::query('SET TRANSACTION ' . $transaction_mode . ';');
|
|
|
|
if($session_characteristics)
|
|
DB::query('SET SESSION CHARACTERISTICS AS TRANSACTION ' . $session_characteristics . ';');
|
|
}
|
|
|
|
/*
|
|
* Create a savepoint that you can jump back to if you encounter problems
|
|
*/
|
|
public function transactionSavepoint($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 $savepoint;");
|
|
else
|
|
DB::query('ROLLBACK;');
|
|
}
|
|
|
|
/*
|
|
* Commit everything inside this transaction so far
|
|
*/
|
|
public function endTransaction(){
|
|
DB::query('COMMIT;');
|
|
}
|
|
|
|
/*
|
|
* Given a tablespace and and location, either create a new one
|
|
* or update the existing one
|
|
*/
|
|
public function createOrReplaceTablespace($name, $location){
|
|
$existing=DB::query("SELECT spcname, spclocation FROM pg_tablespace WHERE spcname='$name';")->first();
|
|
|
|
//NOTE: this location must be empty for this to work
|
|
//We can't seem to change the location of the tablespace through any ALTER commands :(
|
|
|
|
//If a tablespace with this name exists, but the location has changed, then drop the current one
|
|
//if($existing && $location!=$existing['spclocation'])
|
|
// DB::query("DROP TABLESPACE $name;");
|
|
|
|
//If this is a new tablespace, or we have dropped the current one:
|
|
if(!$existing || ($existing && $location!=$existing['spclocation']))
|
|
DB::query("CREATE TABLESPACE $name LOCATION '$location';");
|
|
|
|
}
|
|
|
|
public function createOrReplacePartition($tableName, $partitions, $indexes, $extensions){
|
|
|
|
//We need the plpgsql language to be installed for this to work:
|
|
$this->createLanguage('plpgsql');
|
|
|
|
$trigger='CREATE OR REPLACE FUNCTION ' . $tableName . '_insert_trigger() RETURNS TRIGGER AS $$ BEGIN ';
|
|
$first=true;
|
|
|
|
//Do we need to create a tablespace for this item?
|
|
if($extensions && isset($extensions['tablespace'])){
|
|
$this->createOrReplaceTablespace($extensions['tablespace']['name'], $extensions['tablespace']['location']);
|
|
$tableSpace=' TABLESPACE ' . $extensions['tablespace']['name'];
|
|
} else
|
|
$tableSpace='';
|
|
|
|
foreach($partitions as $partition_name=>$partition_value){
|
|
//Check that this child table does not already exist:
|
|
if(!$this->TableExists($partition_name)){
|
|
DB::query("CREATE TABLE \"$partition_name\" (CHECK (" . str_replace('NEW.', '', $partition_value) . ")) INHERITS (\"$tableName\")$tableSpace;");
|
|
} else {
|
|
//Drop the constraint, we will recreate in in the next line
|
|
$existing_constraint=$this->query("SELECT conname FROM pg_constraint WHERE conname='{$partition_name}_pkey';");
|
|
if($existing_constraint){
|
|
DB::query("ALTER TABLE \"$partition_name\" DROP CONSTRAINT \"{$partition_name}_pkey\";");
|
|
}
|
|
$this->dropTrigger(strtolower('trigger_' . $tableName . '_insert'), $tableName);
|
|
}
|
|
|
|
DB::query("ALTER TABLE \"$partition_name\" ADD CONSTRAINT \"{$partition_name}_pkey\" PRIMARY KEY (\"ID\");");
|
|
|
|
if($first){
|
|
$trigger.='IF';
|
|
$first=false;
|
|
} else
|
|
$trigger.='ELSIF';
|
|
|
|
$trigger.=" ($partition_value) THEN INSERT INTO \"$partition_name\" VALUES (NEW.*);";
|
|
|
|
if($indexes){
|
|
// We need to propogate the indexes through to the child pages.
|
|
// Some of this code is duplicated, and could be tidied up
|
|
foreach($indexes as $name=>$this_index){
|
|
|
|
if($this_index['type']=='fulltext'){
|
|
$fillfactor=$where='';
|
|
if(isset($this_index['fillfactor']))
|
|
$fillfactor='WITH (FILLFACTOR = ' . $this_index['fillfactor'] . ')';
|
|
if(isset($this_index['where']))
|
|
$where='WHERE ' . $this_index['where'];
|
|
|
|
DB::query("CREATE INDEX \"ix_{$partition_name}_{$this_index['name']}\" ON \"" . $partition_name . "\" USING " . $this->default_fts_cluster_method . "(\"ts_" . $name . "\") $fillfactor $where");
|
|
$ts_details=$this->fulltext($this_index, $partition_name, $name);
|
|
DB::query($ts_details['triggers']);
|
|
} else {
|
|
|
|
if(is_array($this_index))
|
|
$index_name=$this_index['name'];
|
|
else $index_name=trim($this_index, '()');
|
|
|
|
$createIndex=$this->getIndexSqlDefinition($partition_name, $index_name, $this_index);
|
|
if($createIndex!==false)
|
|
DB::query($createIndex);
|
|
}
|
|
}
|
|
}
|
|
|
|
//Lastly, clustering goes here:
|
|
if($extensions && isset($extensions['cluster'])){
|
|
DB::query("CLUSTER \"$partition_name\" USING \"{$extensions['cluster']}\";");
|
|
}
|
|
}
|
|
|
|
$trigger.='ELSE RAISE EXCEPTION \'Value id out of range. Fix the ' . $tableName . '_insert_trigger() function!\'; END IF; RETURN NULL; END; $$ LANGUAGE plpgsql;';
|
|
$trigger.='CREATE TRIGGER trigger_' . $tableName . '_insert BEFORE INSERT ON "' . $tableName . '" FOR EACH ROW EXECUTE PROCEDURE ' . $tableName . '_insert_trigger();';
|
|
|
|
DB::query($trigger);
|
|
|
|
}
|
|
|
|
/*
|
|
* This will create a language if it doesn't already exist.
|
|
* This is used by the createOrReplacePartition function, which needs plpgsql
|
|
*/
|
|
public function createLanguage($language){
|
|
$result=DB::query("SELECT lanname FROM pg_language WHERE lanname='$language';")->first();
|
|
|
|
if(!$result){
|
|
DB::query("CREATE LANGUAGE $language;");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression that can be used with Postgres
|
|
* 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(
|
|
'/%Y/' => 'YYYY',
|
|
'/%m/' => 'MM',
|
|
'/%d/' => 'DD',
|
|
'/%H/' => 'HH24',
|
|
'/%i/' => 'MI',
|
|
'/%s/' => 'SS',
|
|
);
|
|
$format = preg_replace(array_keys($translate), array_values($translate), $format);
|
|
|
|
if(preg_match('/^now$/i', $date)) {
|
|
$date = "NOW()";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date)) {
|
|
$date = "TIMESTAMP '$date'";
|
|
}
|
|
|
|
if($format == '%U') return "FLOOR(EXTRACT(epoch FROM $date))";
|
|
|
|
return "to_char($date, TEXT '$format')";
|
|
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression that can be used with Postgres
|
|
* 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, $interval) {
|
|
|
|
if(preg_match('/^now$/i', $date)) {
|
|
$date = "NOW()";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date)) {
|
|
$date = "TIMESTAMP '$date'";
|
|
}
|
|
|
|
// ... when being too precise becomes a pain. we need to cut of the fractions.
|
|
// TIMESTAMP(0) doesn't work because it rounds instead flooring
|
|
return "CAST(SUBSTRING(CAST($date + INTERVAL '$interval' AS VARCHAR) FROM 1 FOR 19) AS TIMESTAMP)";
|
|
}
|
|
|
|
/**
|
|
* Function to return an SQL datetime expression that can be used with Postgres
|
|
* used for querying a datetime substraction
|
|
* @param string $date1, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
|
|
* @param string $date2 to be substracted of $date1, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
|
|
* @return string SQL datetime expression to query for the interval between $date1 and $date2 in seconds which is the result of the substraction
|
|
*/
|
|
function datetimeDifferenceClause($date1, $date2) {
|
|
|
|
if(preg_match('/^now$/i', $date1)) {
|
|
$date1 = "NOW()";
|
|
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date1)) {
|
|
$date1 = "TIMESTAMP '$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)) {
|
|
$date2 = "TIMESTAMP '$date2'";
|
|
}
|
|
|
|
return "(FLOOR(EXTRACT(epoch FROM $date1)) - FLOOR(EXTRACT(epoch from $date2)))";
|
|
}
|
|
|
|
/**
|
|
* Return a set type-formatted string
|
|
* This is used for Multi-enum support, which isn't actually supported by Postgres.
|
|
* Throws a user error to show our lack of support, and return an "int", specifically for sapphire
|
|
* tests that test multi-enums. This results in a test failure, but not crashing the test run.
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function set($values){
|
|
user_error("PostGreSQL does not support multi-enum");
|
|
return "int";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A result-set from a PostgreSQL database.
|
|
* @package sapphire
|
|
* @subpackage model
|
|
*/
|
|
class PostgreSQLQuery extends SS_Query {
|
|
/**
|
|
* The MySQLDatabase object that created this result set.
|
|
* @var PostgreSQLDatabase
|
|
*/
|
|
private $database;
|
|
|
|
/**
|
|
* The internal Postgres handle that points to the result set.
|
|
* @var resource
|
|
*/
|
|
private $handle;
|
|
|
|
/**
|
|
* 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 Postgres handle that is points to the resultset.
|
|
*/
|
|
public function __construct(PostgreSQLDatabase $database, $handle) {
|
|
$this->database = $database;
|
|
$this->handle = $handle;
|
|
}
|
|
|
|
public function __destruct() {
|
|
if(is_resource($this->handle)) pg_free_result($this->handle);
|
|
}
|
|
|
|
public function seek($row) {
|
|
return pg_result_seek($this->handle, $row);
|
|
}
|
|
|
|
public function numRecords() {
|
|
return pg_num_rows($this->handle);
|
|
}
|
|
|
|
public function nextRecord() {
|
|
// Coalesce rather than replace common fields.
|
|
if($data = pg_fetch_row($this->handle)) {
|
|
foreach($data as $columnIdx => $value) {
|
|
$columnName = pg_field_name($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;
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
|
|
?>
|