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| -rw-r--r-- | program/lib/Roundcube/rcube_db_oracle.php | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/program/lib/Roundcube/rcube_db_oracle.php b/program/lib/Roundcube/rcube_db_oracle.php new file mode 100644 index 000000000..95a7fa2c4 --- /dev/null +++ b/program/lib/Roundcube/rcube_db_oracle.php @@ -0,0 +1,263 @@ +<?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 PHP PDO functions | + | for Oracle database | + +-----------------------------------------------------------------------+ + | 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'; + + /** + * Driver-specific configuration of database connection + * + * @param array $dsn DSN for DB connections + * @param PDO $dbh Connection handler + */ + protected function conn_configure($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'"); + } + + /** + * 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 = $dbh->query("SELECT $sequence.currval FROM dual"); + + return $result ? $result->fetchColumn() : 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 + + $orderby = stristr($query, 'ORDER BY'); + $select = substr($query, 0, stripos($query, 'FROM')); + $offset += 1; + + if ($orderby !== false) { + $query = trim(substr($query, 0, -1 * strlen($orderby))); + } + 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 = 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 $query; + } + + /** + * Parse SQL file and fix table names according to table prefix + */ + protected function fix_table_names($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] . $matches[3]; + } + + /** + * Returns PDO DSN string from DSN array + */ + protected function dsn_string($dsn) + { + $params = array(); + $result = 'oci:'; + + if ($dsn['hostspec']) { + $host = $dsn['hostspec']; + if ($dsn['port']) { + $host .= ':' . $dsn['port']; + } + + $dsn['database'] = $host . '/' . $dsn['database']; + } + + if ($dsn['database']) { + $params[] = 'dbname=' . $dsn['database']; + } + + $params['charset'] = 'UTF8'; + + if (!empty($params)) { + $result .= implode(';', $params); + } + + return $result; + } +} |