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| | |
| | | <?php |
| | | |
| | | /** |
| | | +-----------------------------------------------------------------------+ |
| | | | This file is part of the Roundcube Webmail client | |
| | | | Copyright (C) 2011-2014, Kolab Systems AG | |
| | | | | |
| | | | Licensed under the GNU General Public License version 3 or | |
| | | | any later version with exceptions for skins & plugins. | |
| | | | See the README file for a full license statement. | |
| | | | | |
| | | | PURPOSE: | |
| | | | Database wrapper class that implements database functions | |
| | | | for Oracle database using OCI8 extension | |
| | | +-----------------------------------------------------------------------+ |
| | | | Author: Aleksander Machniak <machniak@kolabsys.com> | |
| | | +-----------------------------------------------------------------------+ |
| | | */ |
| | | |
| | | /** |
| | | * Database independent query interface |
| | | * |
| | | * @package Framework |
| | | * @subpackage Database |
| | | */ |
| | | class rcube_db_oci8 extends rcube_db |
| | | { |
| | | public $db_provider = 'oracle'; |
| | | |
| | | |
| | | /** |
| | | * Create connection instance |
| | | */ |
| | | protected function conn_create($dsn) |
| | | { |
| | | // Get database specific connection options |
| | | $dsn_options = $this->dsn_options($dsn); |
| | | |
| | | $function = $this->db_pconn ? 'oci_pconnect' : 'oci_connect'; |
| | | |
| | | if (!function_exists($function)) { |
| | | $this->db_error = true; |
| | | $this->db_error_msg = 'OCI8 extension not loaded. See http://php.net/manual/en/book.oci8.php'; |
| | | |
| | | rcube::raise_error(array('code' => 500, 'type' => 'db', |
| | | 'line' => __LINE__, 'file' => __FILE__, |
| | | 'message' => $this->db_error_msg), true, false); |
| | | |
| | | return; |
| | | } |
| | | |
| | | // connect |
| | | $dbh = @$function($dsn['username'], $dsn['password'], $dsn_options['database'], $dsn_options['charset']); |
| | | |
| | | if (!$dbh) { |
| | | $error = oci_error(); |
| | | $this->db_error = true; |
| | | $this->db_error_msg = $error['message']; |
| | | |
| | | rcube::raise_error(array('code' => 500, 'type' => 'db', |
| | | 'line' => __LINE__, 'file' => __FILE__, |
| | | 'message' => $this->db_error_msg), true, false); |
| | | |
| | | return; |
| | | } |
| | | |
| | | // configure session |
| | | $this->conn_configure($dsn, $dbh); |
| | | |
| | | return $dbh; |
| | | } |
| | | |
| | | /** |
| | | * Driver-specific configuration of database connection |
| | | * |
| | | * @param array $dsn DSN for DB connections |
| | | * @param PDO $dbh Connection handler |
| | | */ |
| | | protected function conn_configure($dsn, $dbh) |
| | | { |
| | | $init_queries = array( |
| | | "ALTER SESSION SET nls_date_format = 'YYYY-MM-DD'", |
| | | "ALTER SESSION SET nls_timestamp_format = 'YYYY-MM-DD HH24:MI:SS'", |
| | | ); |
| | | |
| | | foreach ($init_queries as $query) { |
| | | $stmt = oci_parse($dbh, $query); |
| | | oci_execute($stmt); |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * Connection state checker |
| | | * |
| | | * @return boolean True if in connected state |
| | | */ |
| | | public function is_connected() |
| | | { |
| | | return empty($this->dbh) ? false : $this->db_connected; |
| | | } |
| | | |
| | | /** |
| | | * Execute the query |
| | | */ |
| | | protected function query_execute($query) |
| | | { |
| | | // destroy reference to previous result |
| | | $this->last_result = null; |
| | | $this->db_error_msg = null; |
| | | |
| | | // prepare query |
| | | $result = oci_parse($this->dbh, $query); |
| | | |
| | | if (!@oci_execute($result, OCI_COMMIT_ON_SUCCESS)) { // OCI_NO_AUTO_COMMIT |
| | | $result = $this->handle_error($query, $result); |
| | | } |
| | | |
| | | return $this->last_result = $result; |
| | | } |
| | | |
| | | /** |
| | | * Helper method to handle DB errors. |
| | | * This by default logs the error but could be overriden by a driver implementation |
| | | * |
| | | * @param string Query that triggered the error |
| | | * @return mixed Result to be stored and returned |
| | | */ |
| | | protected function handle_error($query, $result = null) |
| | | { |
| | | $error = oci_error(is_resource($result) ? $result : $this->dbh); |
| | | |
| | | // @TODO: Find error codes for key errors |
| | | if (empty($this->options['ignore_key_errors']) || !in_array($error['code'], array('23000', '23505'))) { |
| | | $this->db_error = true; |
| | | $this->db_error_msg = sprintf('[%s] %s', $error['code'], $error['message']); |
| | | |
| | | rcube::raise_error(array('code' => 500, 'type' => 'db', |
| | | 'line' => __LINE__, 'file' => __FILE__, |
| | | 'message' => $this->db_error_msg . " (SQL Query: $query)" |
| | | ), true, false); |
| | | } |
| | | |
| | | return false; |
| | | } |
| | | |
| | | /** |
| | | * Get last inserted record ID |
| | | * |
| | | * @param string $table Table name (to find the incremented sequence) |
| | | * |
| | | * @return mixed ID or false on failure |
| | | */ |
| | | public function insert_id($table = null) |
| | | { |
| | | if (!$this->db_connected || $this->db_mode == 'r' || empty($table)) { |
| | | return false; |
| | | } |
| | | |
| | | $sequence = $this->quote_identifier($this->sequence_name($table)); |
| | | $result = $this->query("SELECT $sequence.currval FROM dual"); |
| | | $result = $this->fetch_array($result); |
| | | |
| | | return $result[0] ?: false; |
| | | } |
| | | |
| | | /** |
| | | * Get number of affected rows for the last query |
| | | * |
| | | * @param mixed $result Optional query handle |
| | | * |
| | | * @return int Number of (matching) rows |
| | | */ |
| | | public function affected_rows($result = null) |
| | | { |
| | | if ($result || ($result === null && ($result = $this->last_result))) { |
| | | return oci_num_rows($result); |
| | | } |
| | | |
| | | return 0; |
| | | } |
| | | |
| | | /** |
| | | * Get number of rows for a SQL query |
| | | * If no query handle is specified, the last query will be taken as reference |
| | | * |
| | | * @param mixed $result Optional query handle |
| | | * @return mixed Number of rows or false on failure |
| | | * @deprecated This method shows very poor performance and should be avoided. |
| | | */ |
| | | public function num_rows($result = null) |
| | | { |
| | | // not implemented |
| | | return false; |
| | | } |
| | | |
| | | /** |
| | | * Get an associative array for one row |
| | | * If no query handle is specified, the last query will be taken as reference |
| | | * |
| | | * @param mixed $result Optional query handle |
| | | * |
| | | * @return mixed Array with col values or false on failure |
| | | */ |
| | | public function fetch_assoc($result = null) |
| | | { |
| | | return $this->_fetch_row($result, OCI_ASSOC); |
| | | } |
| | | |
| | | /** |
| | | * Get an index array for one row |
| | | * If no query handle is specified, the last query will be taken as reference |
| | | * |
| | | * @param mixed $result Optional query handle |
| | | * |
| | | * @return mixed Array with col values or false on failure |
| | | */ |
| | | public function fetch_array($result = null) |
| | | { |
| | | return $this->_fetch_row($result, OCI_NUM); |
| | | } |
| | | |
| | | /** |
| | | * Get col values for a result row |
| | | * |
| | | * @param mixed $result Optional query handle |
| | | * @param int $mode Fetch mode identifier |
| | | * |
| | | * @return mixed Array with col values or false on failure |
| | | */ |
| | | protected function _fetch_row($result, $mode) |
| | | { |
| | | if ($result || ($result === null && ($result = $this->last_result))) { |
| | | return oci_fetch_array($result, $mode + OCI_RETURN_NULLS + OCI_RETURN_LOBS); |
| | | } |
| | | |
| | | return false; |
| | | } |
| | | |
| | | /** |
| | | * Formats input so it can be safely used in a query |
| | | * PDO_OCI does not implement quote() method |
| | | * |
| | | * @param mixed $input Value to quote |
| | | * @param string $type Type of data (integer, bool, ident) |
| | | * |
| | | * @return string Quoted/converted string for use in query |
| | | */ |
| | | public function quote($input, $type = null) |
| | | { |
| | | // handle int directly for better performance |
| | | if ($type == 'integer' || $type == 'int') { |
| | | return intval($input); |
| | | } |
| | | |
| | | if (is_null($input)) { |
| | | return 'NULL'; |
| | | } |
| | | |
| | | if ($type == 'ident') { |
| | | return $this->quote_identifier($input); |
| | | } |
| | | |
| | | switch ($type) { |
| | | case 'bool': |
| | | case 'integer': |
| | | return intval($input); |
| | | default: |
| | | return "'" . strtr($input, array( |
| | | '?' => '??', |
| | | "'" => "''", |
| | | rcube_db::DEFAULT_QUOTE => rcube_db::DEFAULT_QUOTE . rcube_db::DEFAULT_QUOTE |
| | | )) . "'"; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * Return correct name for a specific database sequence |
| | | * |
| | | * @param string $table Table name |
| | | * |
| | | * @return string Translated sequence name |
| | | */ |
| | | protected function sequence_name($table) |
| | | { |
| | | // Note: we support only one sequence per table |
| | | // Note: The sequence name must be <table_name>_seq |
| | | $sequence = $table . '_seq'; |
| | | |
| | | // modify sequence name if prefix is configured |
| | | if ($prefix = $this->options['table_prefix']) { |
| | | return $prefix . $sequence; |
| | | } |
| | | |
| | | return $sequence; |
| | | } |
| | | |
| | | /** |
| | | * Return SQL statement for case insensitive LIKE |
| | | * |
| | | * @param string $column Field name |
| | | * @param string $value Search value |
| | | * |
| | | * @return string SQL statement to use in query |
| | | */ |
| | | public function ilike($column, $value) |
| | | { |
| | | return 'UPPER(' . $this->quote_identifier($column) . ') LIKE UPPER(' . $this->quote($value) . ')'; |
| | | } |
| | | |
| | | /** |
| | | * Return SQL function for current time and date |
| | | * |
| | | * @param int $interval Optional interval (in seconds) to add/subtract |
| | | * |
| | | * @return string SQL function to use in query |
| | | */ |
| | | public function now($interval = 0) |
| | | { |
| | | if ($interval) { |
| | | $interval = intval($interval); |
| | | return "current_timestamp + INTERVAL '$interval' SECOND"; |
| | | } |
| | | |
| | | return "current_timestamp"; |
| | | } |
| | | |
| | | /** |
| | | * Return SQL statement to convert a field value into a unix timestamp |
| | | * |
| | | * @param string $field Field name |
| | | * |
| | | * @return string SQL statement to use in query |
| | | * @deprecated |
| | | */ |
| | | public function unixtimestamp($field) |
| | | { |
| | | return "(($field - to_date('1970-01-01','YYYY-MM-DD')) * 60 * 60 * 24)"; |
| | | } |
| | | |
| | | /** |
| | | * Adds TOP (LIMIT,OFFSET) clause to the query |
| | | * |
| | | * @param string $query SQL query |
| | | * @param int $limit Number of rows |
| | | * @param int $offset Offset |
| | | * |
| | | * @return string SQL query |
| | | */ |
| | | protected function set_limit($query, $limit = 0, $offset = 0) |
| | | { |
| | | $limit = intval($limit); |
| | | $offset = intval($offset); |
| | | $end = $offset + $limit; |
| | | |
| | | // @TODO: Oracle 12g has better OFFSET support |
| | | |
| | | if (!$offset) { |
| | | $query = "SELECT * FROM ($query) a WHERE rownum <= $end"; |
| | | } |
| | | else { |
| | | $query = "SELECT * FROM (SELECT a.*, rownum as rn FROM ($query) a WHERE rownum <= $end) b WHERE rn > $offset"; |
| | | } |
| | | |
| | | return $query; |
| | | } |
| | | |
| | | /** |
| | | * Parse SQL file and fix table names according to table prefix |
| | | */ |
| | | protected function fix_table_names($sql) |
| | | { |
| | | if (!$this->options['table_prefix']) { |
| | | return $sql; |
| | | } |
| | | |
| | | $sql = parent::fix_table_names($sql); |
| | | |
| | | // replace sequence names, and other Oracle-specific commands |
| | | $sql = preg_replace_callback('/((SEQUENCE ["]?)([^" \r\n]+)/', |
| | | array($this, 'fix_table_names_callback'), |
| | | $sql |
| | | ); |
| | | |
| | | $sql = preg_replace_callback( |
| | | '/([ \r\n]+["]?)([^"\' \r\n\.]+)(["]?\.nextval)/', |
| | | array($this, 'fix_table_names_seq_callback'), |
| | | $sql |
| | | ); |
| | | |
| | | return $sql; |
| | | } |
| | | |
| | | /** |
| | | * Preg_replace callback for fix_table_names() |
| | | */ |
| | | protected function fix_table_names_seq_callback($matches) |
| | | { |
| | | return $matches[1] . $this->options['table_prefix'] . $matches[2] . $matches[3]; |
| | | } |
| | | |
| | | /** |
| | | * Returns connection options from DSN array |
| | | */ |
| | | protected function dsn_options($dsn) |
| | | { |
| | | $params = array(); |
| | | |
| | | if ($dsn['hostspec']) { |
| | | $host = $dsn['hostspec']; |
| | | if ($dsn['port']) { |
| | | $host .= ':' . $dsn['port']; |
| | | } |
| | | |
| | | $params['database'] = $host . '/' . $dsn['database']; |
| | | } |
| | | |
| | | $params['charset'] = 'UTF8'; |
| | | |
| | | return $params; |
| | | } |
| | | |
| | | /** |
| | | * Execute the given SQL script |
| | | * |
| | | * @param string SQL queries to execute |
| | | * |
| | | * @return boolen True on success, False on error |
| | | */ |
| | | public function exec_script($sql) |
| | | { |
| | | $sql = $this->fix_table_names($sql); |
| | | $buff = ''; |
| | | $body = false; |
| | | |
| | | foreach (explode("\n", $sql) as $line) { |
| | | $tok = strtolower(trim($line)); |
| | | if (preg_match('/^--/', $line) || $tok == '') { |
| | | continue; |
| | | } |
| | | |
| | | $buff .= $line . "\n"; |
| | | |
| | | // detect PL/SQL function bodies, don't break on semicolon |
| | | if ($body && $tok == 'end;') { |
| | | $body = false; |
| | | } |
| | | else if (!$body && $tok == 'begin') { |
| | | $body = true; |
| | | } |
| | | |
| | | if (!$body && substr($tok, -1) == ';') { |
| | | $this->query($buff); |
| | | $buff = ''; |
| | | if ($this->db_error) { |
| | | break; |
| | | } |
| | | } |
| | | } |
| | | |
| | | return !$this->db_error; |
| | | } |
| | | } |