| | |
| | | | See the README file for a full license statement. | |
| | | | | |
| | | | PURPOSE: | |
| | | | Database wrapper class that implements PHP PDO functions | |
| | | | for Oracle database | |
| | | | Database wrapper class that implements database functions | |
| | | | for Oracle database using OCI8 extension | |
| | | +-----------------------------------------------------------------------+ |
| | | | Author: Aleksander Machniak <machniak@kolabsys.com> | |
| | | +-----------------------------------------------------------------------+ |
| | |
| | | |
| | | /** |
| | | * Database independent query interface |
| | | * This is a wrapper for the PHP PDO |
| | | * |
| | | * @package Framework |
| | | * @subpackage Database |
| | |
| | | class rcube_db_oracle 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 $dbh; |
| | | } |
| | | |
| | | /** |
| | | * Driver-specific configuration of database connection |
| | |
| | | */ |
| | | protected function conn_configure($dsn, $dbh) |
| | | { |
| | | $dbh->query("ALTER SESSION SET nls_date_format = 'YYYY-MM-DD'"); |
| | | $dbh->query("ALTER SESSION SET nls_timestamp_format = 'YYYY-MM-DD HH24:MI:SS'"); |
| | | $init_queries = array( |
| | | "ALTER SESSION SET nls_date_format = 'YYYY-MM-DD'", |
| | | "ALTER SESSION SET nls_timestamp_format = 'YYYY-MM-DD HH24:MI:SS'", |
| | | ); |
| | | |
| | | foreach ($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 a SQL query with limits |
| | | * |
| | | * @param string $query SQL query to execute |
| | | * @param int $offset Offset for LIMIT statement |
| | | * @param int $numrows Number of rows for LIMIT statement |
| | | * @param array $params Values to be inserted in query |
| | | * |
| | | * @return PDOStatement|bool Query handle or False on error |
| | | */ |
| | | protected function _query($query, $offset, $numrows, $params) |
| | | { |
| | | $query = ltrim($query); |
| | | |
| | | $this->db_connect($this->dsn_select($query), true); |
| | | |
| | | // check connection before proceeding |
| | | if (!$this->is_connected()) { |
| | | return $this->last_result = false; |
| | | } |
| | | |
| | | if ($numrows || $offset) { |
| | | $query = $this->set_limit($query, $numrows, $offset); |
| | | } |
| | | |
| | | // replace self::DEFAULT_QUOTE with driver-specific quoting |
| | | $query = $this->query_parse($query); |
| | | |
| | | // Because in Roundcube we mostly use queries that are |
| | | // executed only once, we will not use prepared queries |
| | | $pos = 0; |
| | | $idx = 0; |
| | | $args = array(); |
| | | |
| | | if (count($params)) { |
| | | while ($pos = strpos($query, '?', $pos)) { |
| | | if ($query[$pos+1] == '?') { // skip escaped '?' |
| | | $pos += 2; |
| | | } |
| | | else { |
| | | $val = $this->quote($params[$idx++]); |
| | | |
| | | // long strings are not allowed inline, need to be parametrized |
| | | if (strlen($val) > 4000) { |
| | | $key = ':param' . (count($args) + 1); |
| | | $args[$key] = $params[$idx-1]; |
| | | $val = $key; |
| | | } |
| | | |
| | | unset($params[$idx-1]); |
| | | $query = substr_replace($query, $val, $pos, 1); |
| | | $pos += strlen($val); |
| | | } |
| | | } |
| | | } |
| | | |
| | | // replace escaped '?' back to normal, see self::quote() |
| | | $query = str_replace('??', '?', $query); |
| | | $query = rtrim($query, " \t\n\r\0\x0B;"); |
| | | |
| | | // log query |
| | | $this->debug($query); |
| | | |
| | | // destroy reference to previous result |
| | | $this->last_result = null; |
| | | $this->db_error_msg = null; |
| | | |
| | | // prepare query |
| | | $result = @oci_parse($this->dbh, $query); |
| | | $mode = $this->in_transaction ? OCI_NO_AUTO_COMMIT : OCI_COMMIT_ON_SUCCESS; |
| | | |
| | | if ($result) { |
| | | foreach ($args as $param => $arg) { |
| | | oci_bind_by_name($result, $param, $args[$param], -1, SQLT_LNG); |
| | | } |
| | | } |
| | | |
| | | // execute query |
| | | if (!$result || !@oci_execute($result, $mode)) { |
| | | $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; |
| | | } |
| | | |
| | | /** |
| | |
| | | } |
| | | |
| | | $sequence = $this->quote_identifier($this->sequence_name($table)); |
| | | $result = $dbh->query("SELECT $sequence.currval FROM dual"); |
| | | $result = $this->query("SELECT $sequence.currval FROM dual"); |
| | | $result = $this->fetch_array($result); |
| | | |
| | | return $result ? $result->fetchColumn() : false; |
| | | 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; |
| | | } |
| | | |
| | | /** |
| | |
| | | |
| | | // @TODO: Oracle 12g has better OFFSET support |
| | | |
| | | $orderby = stristr($query, 'ORDER BY'); |
| | | $select = substr($query, 0, stripos($query, 'FROM')); |
| | | $offset += 1; |
| | | |
| | | if ($orderby !== false) { |
| | | $query = trim(substr($query, 0, -1 * strlen($orderby))); |
| | | if (!$offset) { |
| | | $query = "SELECT * FROM ($query) a WHERE rownum <= $end"; |
| | | } |
| | | else { |
| | | // it shouldn't happen, paging without sorting has not much sense |
| | | // @FIXME: I don't know how to build paging query without ORDER BY |
| | | $orderby = "ORDER BY 1"; |
| | | $query = "SELECT * FROM (SELECT a.*, rownum as rn FROM ($query) a WHERE rownum <= $end) b WHERE rn > $offset"; |
| | | } |
| | | |
| | | $query = preg_replace('/^SELECT\s/i', '', $query); |
| | | $query = "$select FROM (SELECT ROW_NUMBER() OVER ($orderby) AS row_number, $query)" |
| | | . " WHERE row_number BETWEEN $offset AND $end"; |
| | | |
| | | return $query; |
| | | } |
| | |
| | | } |
| | | |
| | | /** |
| | | * Returns PDO DSN string from DSN array |
| | | * Returns connection options from DSN array |
| | | */ |
| | | protected function dsn_string($dsn) |
| | | protected function dsn_options($dsn) |
| | | { |
| | | $params = array(); |
| | | $result = 'oci:'; |
| | | |
| | | if ($dsn['hostspec']) { |
| | | $host = $dsn['hostspec']; |
| | |
| | | $host .= ':' . $dsn['port']; |
| | | } |
| | | |
| | | $dsn['database'] = $host . '/' . $dsn['database']; |
| | | } |
| | | |
| | | if ($dsn['database']) { |
| | | $params[] = 'dbname=' . $dsn['database']; |
| | | $params['database'] = $host . '/' . $dsn['database']; |
| | | } |
| | | |
| | | $params['charset'] = 'UTF8'; |
| | | |
| | | if (!empty($params)) { |
| | | $result .= implode(';', $params); |
| | | return $params; |
| | | } |
| | | |
| | | return $result; |
| | | /** |
| | | * Execute the given SQL script |
| | | * |
| | | * @param string SQL queries to execute |
| | | * |
| | | * @return boolen True on success, False on error |
| | | */ |
| | | public function exec_script($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; |
| | | } |
| | | |
| | | /** |
| | | * Start transaction |
| | | * |
| | | * @return bool True on success, False on failure |
| | | */ |
| | | public function startTransaction() |
| | | { |
| | | $this->db_connect('w', true); |
| | | |
| | | // check connection before proceeding |
| | | if (!$this->is_connected()) { |
| | | return $this->last_result = false; |
| | | } |
| | | |
| | | $this->debug('BEGIN TRANSACTION'); |
| | | |
| | | return $this->last_result = $this->in_transaction = true; |
| | | } |
| | | |
| | | /** |
| | | * Commit transaction |
| | | * |
| | | * @return bool True on success, False on failure |
| | | */ |
| | | public function endTransaction() |
| | | { |
| | | $this->db_connect('w', true); |
| | | |
| | | // check connection before proceeding |
| | | if (!$this->is_connected()) { |
| | | return $this->last_result = false; |
| | | } |
| | | |
| | | $this->debug('COMMIT TRANSACTION'); |
| | | |
| | | if ($result = @oci_commit($this->dbh)) { |
| | | $this->in_transaction = true; |
| | | } |
| | | else { |
| | | $this->handle_error('COMMIT'); |
| | | } |
| | | |
| | | return $this->last_result = $result; |
| | | } |
| | | |
| | | /** |
| | | * Rollback transaction |
| | | * |
| | | * @return bool True on success, False on failure |
| | | */ |
| | | public function rollbackTransaction() |
| | | { |
| | | $this->db_connect('w', true); |
| | | |
| | | // check connection before proceeding |
| | | if (!$this->is_connected()) { |
| | | return $this->last_result = false; |
| | | } |
| | | |
| | | $this->debug('ROLLBACK TRANSACTION'); |
| | | |
| | | if ($result = @oci_rollback($this->dbh)) { |
| | | $this->in_transaction = false; |
| | | } |
| | | else { |
| | | $this->handle_error('ROLLBACK'); |
| | | } |
| | | |
| | | return $this->last_result = $this->dbh->rollBack(); |
| | | } |
| | | } |