681 lines
14 KiB
PHP
681 lines
14 KiB
PHP
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<?php
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/**
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* @package Joomla.Platform
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* @subpackage Database
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*
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* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE
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*/
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defined('JPATH_PLATFORM') or die;
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/**
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* Oracle database driver
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*
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* @package Joomla.Platform
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* @subpackage Database
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* @see http://php.net/pdo
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* @since 12.1
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*/
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class JDatabaseDriverOracle extends JDatabaseDriverPdo
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{
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/**
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* The name of the database driver.
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*
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* @var string
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* @since 12.1
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*/
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public $name = 'oracle';
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/**
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* The character(s) used to quote SQL statement names such as table names or field names,
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* etc. The child classes should define this as necessary. If a single character string the
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* same character is used for both sides of the quoted name, else the first character will be
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* used for the opening quote and the second for the closing quote.
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*
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* @var string
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* @since 12.1
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*/
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protected $nameQuote = '"';
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/**
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* Returns the current dateformat
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*
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* @var string
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* @since 12.1
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*/
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protected $dateformat;
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/**
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* Returns the current character set
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*
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* @var string
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* @since 12.1
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*/
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protected $charset;
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/**
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* Constructor.
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*
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* @param array $options List of options used to configure the connection
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*
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* @since 12.1
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*/
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public function __construct($options)
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{
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$options['driver'] = 'oci';
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$options['charset'] = (isset($options['charset'])) ? $options['charset'] : 'AL32UTF8';
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$options['dateformat'] = (isset($options['dateformat'])) ? $options['dateformat'] : 'RRRR-MM-DD HH24:MI:SS';
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$this->charset = $options['charset'];
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$this->dateformat = $options['dateformat'];
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// Finalize initialisation
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parent::__construct($options);
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}
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/**
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* Destructor.
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*
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* @since 12.1
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*/
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public function __destruct()
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{
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$this->freeResult();
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unset($this->connection);
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}
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/**
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* Connects to the database if needed.
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*
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* @return void Returns void if the database connected successfully.
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*
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* @since 12.1
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* @throws RuntimeException
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*/
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public function connect()
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{
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if ($this->connection)
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{
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return;
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}
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parent::connect();
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if (isset($this->options['schema']))
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{
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$this->setQuery('ALTER SESSION SET CURRENT_SCHEMA = ' . $this->quoteName($this->options['schema']))->execute();
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}
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$this->setDateFormat($this->dateformat);
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}
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/**
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* Disconnects the database.
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*
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* @return void
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*
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* @since 12.1
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*/
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public function disconnect()
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{
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// Close the connection.
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$this->freeResult();
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unset($this->connection);
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}
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/**
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* Drops a table from the database.
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*
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* Note: The IF EXISTS flag is unused in the Oracle driver.
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*
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* @param string $tableName The name of the database table to drop.
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* @param boolean $ifExists Optionally specify that the table must exist before it is dropped.
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*
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* @return JDatabaseDriverOracle Returns this object to support chaining.
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*
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* @since 12.1
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*/
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public function dropTable($tableName, $ifExists = true)
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{
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$this->connect();
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$query = $this->getQuery(true)
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->setQuery('DROP TABLE :tableName');
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$query->bind(':tableName', $tableName);
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$this->setQuery($query);
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$this->execute();
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return $this;
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}
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/**
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* Method to get the database collation in use by sampling a text field of a table in the database.
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*
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* @return mixed The collation in use by the database or boolean false if not supported.
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*
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* @since 12.1
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*/
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public function getCollation()
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{
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return $this->charset;
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}
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/**
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* Get a query to run and verify the database is operational.
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*
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* @return string The query to check the health of the DB.
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*
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* @since 12.2
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*/
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public function getConnectedQuery()
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{
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return 'SELECT 1 FROM dual';
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}
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/**
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* Returns the current date format
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* This method should be useful in the case that
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* somebody actually wants to use a different
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* date format and needs to check what the current
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* one is to see if it needs to be changed.
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*
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* @return string The current date format
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*
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* @since 12.1
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*/
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public function getDateFormat()
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{
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return $this->dateformat;
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}
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/**
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* Shows the table CREATE statement that creates the given tables.
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*
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* Note: You must have the correct privileges before this method
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* will return usable results!
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*
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* @param mixed $tables A table name or a list of table names.
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*
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* @return array A list of the create SQL for the tables.
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*
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* @since 12.1
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* @throws RuntimeException
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*/
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public function getTableCreate($tables)
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{
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$this->connect();
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$result = array();
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$query = $this->getQuery(true)
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->select('dbms_metadata.get_ddl(:type, :tableName)')
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->from('dual')
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->bind(':type', 'TABLE');
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// Sanitize input to an array and iterate over the list.
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settype($tables, 'array');
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foreach ($tables as $table)
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{
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$query->bind(':tableName', $table);
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$this->setQuery($query);
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$statement = (string) $this->loadResult();
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$result[$table] = $statement;
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}
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return $result;
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}
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/**
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* Retrieves field information about a given table.
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*
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* @param string $table The name of the database table.
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* @param boolean $typeOnly True to only return field types.
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*
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* @return array An array of fields for the database table.
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*
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* @since 12.1
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* @throws RuntimeException
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*/
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public function getTableColumns($table, $typeOnly = true)
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{
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$this->connect();
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$columns = array();
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$query = $this->getQuery(true);
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$fieldCasing = $this->getOption(PDO::ATTR_CASE);
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$this->setOption(PDO::ATTR_CASE, PDO::CASE_UPPER);
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$table = strtoupper($table);
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$query->select('*');
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$query->from('ALL_TAB_COLUMNS');
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$query->where('table_name = :tableName');
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$prefixedTable = str_replace('#__', strtoupper($this->tablePrefix), $table);
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$query->bind(':tableName', $prefixedTable);
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$this->setQuery($query);
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$fields = $this->loadObjectList();
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if ($typeOnly)
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{
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foreach ($fields as $field)
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{
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$columns[$field->COLUMN_NAME] = $field->DATA_TYPE;
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}
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}
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else
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{
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foreach ($fields as $field)
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{
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$columns[$field->COLUMN_NAME] = $field;
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$columns[$field->COLUMN_NAME]->Default = null;
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}
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}
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$this->setOption(PDO::ATTR_CASE, $fieldCasing);
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return $columns;
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}
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/**
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* Get the details list of keys for a table.
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*
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* @param string $table The name of the table.
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*
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* @return array An array of the column specification for the table.
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*
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* @since 12.1
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* @throws RuntimeException
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*/
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public function getTableKeys($table)
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{
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$this->connect();
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$query = $this->getQuery(true);
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$fieldCasing = $this->getOption(PDO::ATTR_CASE);
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$this->setOption(PDO::ATTR_CASE, PDO::CASE_UPPER);
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$table = strtoupper($table);
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$query->select('*')
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->from('ALL_CONSTRAINTS')
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->where('table_name = :tableName')
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->bind(':tableName', $table);
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$this->setQuery($query);
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$keys = $this->loadObjectList();
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$this->setOption(PDO::ATTR_CASE, $fieldCasing);
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return $keys;
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}
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/**
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* Method to get an array of all tables in the database (schema).
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*
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* @param string $databaseName The database (schema) name
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* @param boolean $includeDatabaseName Whether to include the schema name in the results
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*
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* @return array An array of all the tables in the database.
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*
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* @since 12.1
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* @throws RuntimeException
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*/
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public function getTableList($databaseName = null, $includeDatabaseName = false)
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{
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$this->connect();
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$query = $this->getQuery(true);
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if ($includeDatabaseName)
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{
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$query->select('owner, table_name');
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}
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else
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{
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$query->select('table_name');
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}
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$query->from('all_tables');
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if ($databaseName)
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{
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$query->where('owner = :database')
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->bind(':database', $databaseName);
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}
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$query->order('table_name');
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$this->setQuery($query);
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if ($includeDatabaseName)
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{
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$tables = $this->loadAssocList();
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}
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else
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{
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$tables = $this->loadColumn();
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}
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return $tables;
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}
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/**
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* Get the version of the database connector.
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*
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* @return string The database connector version.
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*
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* @since 12.1
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*/
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public function getVersion()
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{
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$this->connect();
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$this->setQuery("select value from nls_database_parameters where parameter = 'NLS_RDBMS_VERSION'");
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return $this->loadResult();
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}
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/**
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* Select a database for use.
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*
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* @param string $database The name of the database to select for use.
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*
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* @return boolean True if the database was successfully selected.
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*
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* @since 12.1
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* @throws RuntimeException
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*/
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public function select($database)
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{
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$this->connect();
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return true;
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}
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/**
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* Sets the Oracle Date Format for the session
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* Default date format for Oracle is = DD-MON-RR
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* The default date format for this driver is:
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* 'RRRR-MM-DD HH24:MI:SS' since it is the format
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* that matches the MySQL one used within most Joomla
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* tables.
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*
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||
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* @param string $dateFormat Oracle Date Format String
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||
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*
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* @return boolean
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*
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* @since 12.1
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*/
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public function setDateFormat($dateFormat = 'DD-MON-RR')
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{
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$this->connect();
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$this->setQuery("ALTER SESSION SET NLS_DATE_FORMAT = '$dateFormat'");
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if (!$this->execute())
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{
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return false;
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}
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$this->setQuery("ALTER SESSION SET NLS_TIMESTAMP_FORMAT = '$dateFormat'");
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if (!$this->execute())
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{
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|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->dateformat = $dateFormat;
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the connection to use UTF-8 character encoding.
|
||
|
|
*
|
||
|
|
* Returns false automatically for the Oracle driver since
|
||
|
|
* you can only set the character set when the connection
|
||
|
|
* is created.
|
||
|
|
*
|
||
|
|
* @return boolean True on success.
|
||
|
|
*
|
||
|
|
* @since 12.1
|
||
|
|
*/
|
||
|
|
public function setUTF()
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Locks a table in the database.
|
||
|
|
*
|
||
|
|
* @param string $table The name of the table to unlock.
|
||
|
|
*
|
||
|
|
* @return JDatabaseDriverOracle Returns this object to support chaining.
|
||
|
|
*
|
||
|
|
* @since 12.1
|
||
|
|
* @throws RuntimeException
|
||
|
|
*/
|
||
|
|
public function lockTable($table)
|
||
|
|
{
|
||
|
|
$this->setQuery('LOCK TABLE ' . $this->quoteName($table) . ' IN EXCLUSIVE MODE')->execute();
|
||
|
|
|
||
|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Renames a table in the database.
|
||
|
|
*
|
||
|
|
* @param string $oldTable The name of the table to be renamed
|
||
|
|
* @param string $newTable The new name for the table.
|
||
|
|
* @param string $backup Not used by Oracle.
|
||
|
|
* @param string $prefix Not used by Oracle.
|
||
|
|
*
|
||
|
|
* @return JDatabaseDriverOracle Returns this object to support chaining.
|
||
|
|
*
|
||
|
|
* @since 12.1
|
||
|
|
* @throws RuntimeException
|
||
|
|
*/
|
||
|
|
public function renameTable($oldTable, $newTable, $backup = null, $prefix = null)
|
||
|
|
{
|
||
|
|
$this->setQuery('RENAME ' . $oldTable . ' TO ' . $newTable)->execute();
|
||
|
|
|
||
|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Unlocks tables in the database.
|
||
|
|
*
|
||
|
|
* @return JDatabaseDriverOracle Returns this object to support chaining.
|
||
|
|
*
|
||
|
|
* @since 12.1
|
||
|
|
* @throws RuntimeException
|
||
|
|
*/
|
||
|
|
public function unlockTables()
|
||
|
|
{
|
||
|
|
$this->setQuery('COMMIT')->execute();
|
||
|
|
|
||
|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Test to see if the PDO ODBC connector is available.
|
||
|
|
*
|
||
|
|
* @return boolean True on success, false otherwise.
|
||
|
|
*
|
||
|
|
* @since 12.1
|
||
|
|
*/
|
||
|
|
public static function isSupported()
|
||
|
|
{
|
||
|
|
return class_exists('PDO') && in_array('oci', PDO::getAvailableDrivers());
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function replaces a string identifier <var>$prefix</var> with the string held is the
|
||
|
|
* <var>tablePrefix</var> class variable.
|
||
|
|
*
|
||
|
|
* @param string $query The SQL statement to prepare.
|
||
|
|
* @param string $prefix The common table prefix.
|
||
|
|
*
|
||
|
|
* @return string The processed SQL statement.
|
||
|
|
*
|
||
|
|
* @since 11.1
|
||
|
|
*/
|
||
|
|
public function replacePrefix($query, $prefix = '#__')
|
||
|
|
{
|
||
|
|
$startPos = 0;
|
||
|
|
$quoteChar = "'";
|
||
|
|
$literal = '';
|
||
|
|
|
||
|
|
$query = trim($query);
|
||
|
|
$n = strlen($query);
|
||
|
|
|
||
|
|
while ($startPos < $n)
|
||
|
|
{
|
||
|
|
$ip = strpos($query, $prefix, $startPos);
|
||
|
|
if ($ip === false)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
$j = strpos($query, "'", $startPos);
|
||
|
|
|
||
|
|
if ($j === false)
|
||
|
|
{
|
||
|
|
$j = $n;
|
||
|
|
}
|
||
|
|
|
||
|
|
$literal .= str_replace($prefix, $this->tablePrefix, substr($query, $startPos, $j - $startPos));
|
||
|
|
$startPos = $j;
|
||
|
|
|
||
|
|
$j = $startPos + 1;
|
||
|
|
|
||
|
|
if ($j >= $n)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Quote comes first, find end of quote
|
||
|
|
while (true)
|
||
|
|
{
|
||
|
|
$k = strpos($query, $quoteChar, $j);
|
||
|
|
$escaped = false;
|
||
|
|
if ($k === false)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
$l = $k - 1;
|
||
|
|
while ($l >= 0 && $query{$l} == '\\')
|
||
|
|
{
|
||
|
|
$l--;
|
||
|
|
$escaped = !$escaped;
|
||
|
|
}
|
||
|
|
if ($escaped)
|
||
|
|
{
|
||
|
|
$j = $k + 1;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if ($k === false)
|
||
|
|
{
|
||
|
|
// Error in the query - no end quote; ignore it
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
$literal .= substr($query, $startPos, $k - $startPos + 1);
|
||
|
|
$startPos = $k + 1;
|
||
|
|
}
|
||
|
|
if ($startPos < $n)
|
||
|
|
{
|
||
|
|
$literal .= substr($query, $startPos, $n - $startPos);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $literal;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Method to commit a transaction.
|
||
|
|
*
|
||
|
|
* @param boolean $toSavepoint If true, commit to the last savepoint.
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*
|
||
|
|
* @since 12.3
|
||
|
|
* @throws RuntimeException
|
||
|
|
*/
|
||
|
|
public function transactionCommit($toSavepoint = false)
|
||
|
|
{
|
||
|
|
$this->connect();
|
||
|
|
|
||
|
|
if (!$toSavepoint || $this->transactionDepth <= 1)
|
||
|
|
{
|
||
|
|
parent::transactionCommit($toSavepoint);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$this->transactionDepth--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Method to roll back a transaction.
|
||
|
|
*
|
||
|
|
* @param boolean $toSavepoint If true, rollback to the last savepoint.
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*
|
||
|
|
* @since 12.3
|
||
|
|
* @throws RuntimeException
|
||
|
|
*/
|
||
|
|
public function transactionRollback($toSavepoint = false)
|
||
|
|
{
|
||
|
|
$this->connect();
|
||
|
|
|
||
|
|
if (!$toSavepoint || $this->transactionDepth <= 1)
|
||
|
|
{
|
||
|
|
parent::transactionRollback($toSavepoint);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$savepoint = 'SP_' . ($this->transactionDepth - 1);
|
||
|
|
$this->setQuery('ROLLBACK TO SAVEPOINT ' . $this->quoteName($savepoint));
|
||
|
|
|
||
|
|
if ($this->execute())
|
||
|
|
{
|
||
|
|
$this->transactionDepth--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Method to initialize a transaction.
|
||
|
|
*
|
||
|
|
* @param boolean $asSavepoint If true and a transaction is already active, a savepoint will be created.
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*
|
||
|
|
* @since 12.3
|
||
|
|
* @throws RuntimeException
|
||
|
|
*/
|
||
|
|
public function transactionStart($asSavepoint = false)
|
||
|
|
{
|
||
|
|
$this->connect();
|
||
|
|
|
||
|
|
if (!$asSavepoint || !$this->transactionDepth)
|
||
|
|
{
|
||
|
|
return parent::transactionStart($asSavepoint);
|
||
|
|
}
|
||
|
|
|
||
|
|
$savepoint = 'SP_' . $this->transactionDepth;
|
||
|
|
$this->setQuery('SAVEPOINT ' . $this->quoteName($savepoint));
|
||
|
|
|
||
|
|
if ($this->execute())
|
||
|
|
{
|
||
|
|
$this->transactionDepth++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|