diff program/lib/Roundcube/rcube_db_mssql.php @ 0:4681f974d28b

vanilla 1.3.3 distro, I hope
author Charlie Root
date Thu, 04 Jan 2018 15:52:31 -0500
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/lib/Roundcube/rcube_db_mssql.php	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,190 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2012, The Roundcube Dev Team                       |
+ |                                                                       |
+ | 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 MS SQL Server database                                          |
+ +-----------------------------------------------------------------------+
+ | Author: Aleksander Machniak <alec@alec.pl>                            |
+ +-----------------------------------------------------------------------+
+*/
+
+/**
+ * Database independent query interface
+ * This is a wrapper for the PHP PDO
+ *
+ * @package    Framework
+ * @subpackage Database
+ */
+class rcube_db_mssql extends rcube_db
+{
+    public $db_provider = 'mssql';
+
+    /**
+     * Object constructor
+     *
+     * @param string $db_dsnw DSN for read/write operations
+     * @param string $db_dsnr Optional DSN for read only operations
+     * @param bool   $pconn   Enables persistent connections
+     */
+    public function __construct($db_dsnw, $db_dsnr = '', $pconn = false)
+    {
+        parent::__construct($db_dsnw, $db_dsnr, $pconn);
+
+        $this->options['identifier_start'] = '[';
+        $this->options['identifier_end'] = ']';
+    }
+
+    /**
+     * Driver-specific configuration of database connection
+     *
+     * @param array $dsn DSN for DB connections
+     * @param PDO   $dbh Connection handler
+     */
+    protected function conn_configure($dsn, $dbh)
+    {
+        // Set date format in case of non-default language (#1488918)
+        $dbh->query("SET DATEFORMAT ymd");
+    }
+
+    /**
+     * 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 "dateadd(second, $interval, getdate())";
+        }
+
+        return "getdate()";
+    }
+
+    /**
+     * 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 "DATEDIFF(second, '19700101', $field) + DATEDIFF(second, GETDATE(), GETUTCDATE())";
+    }
+
+    /**
+     * Abstract SQL statement for value concatenation
+     *
+     * @return string SQL statement to be used in query
+     */
+    public function concat(/* col1, col2, ... */)
+    {
+        $args = func_get_args();
+
+        if (is_array($args[0])) {
+            $args = $args[0];
+        }
+
+        return '(' . join('+', $args) . ')';
+    }
+
+    /**
+     * 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 + $limit;
+
+        // query without OFFSET
+        if (!$offset) {
+            $query = preg_replace('/^SELECT\s/i', "SELECT TOP $limit ", $query);
+            return $query;
+        }
+
+        $orderby = stristr($query, 'ORDER BY');
+        $offset += 1;
+
+        if ($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);
+        $query = "WITH paging AS (SELECT ROW_NUMBER() OVER ($orderby) AS [RowNumber], $query)"
+            . " SELECT * FROM paging WHERE [RowNumber] BETWEEN $offset AND $end ORDER BY [RowNumber]";
+
+        return $query;
+    }
+
+    /**
+     * Returns PDO DSN string from DSN array
+     */
+    protected function dsn_string($dsn)
+    {
+        $params = array();
+        $result = $dsn['phptype'] . ':';
+
+        if ($dsn['hostspec']) {
+            $host = $dsn['hostspec'];
+            if ($dsn['port']) {
+                $host .= ',' . $dsn['port'];
+            }
+            $params[] = 'host=' . $host;
+        }
+
+        if ($dsn['database']) {
+            $params[] = 'dbname=' . $dsn['database'];
+        }
+
+        if (!empty($params)) {
+            $result .= implode(';', $params);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Parse SQL file and fix table names according to table prefix
+     */
+    protected function fix_table_names($sql)
+    {
+        if (!$this->options['table_prefix']) {
+            return $sql;
+        }
+
+        // replace sequence names, and other postgres-specific commands
+        $sql = preg_replace_callback(
+            '/((TABLE|(?<!ON )UPDATE|INSERT INTO|FROM(?! deleted)| ON(?! (DELETE|UPDATE|\[PRIMARY\]))'
+            . '|REFERENCES|CONSTRAINT|TRIGGER|INDEX)\s+(\[dbo\]\.)?[\[\]]*)([^\[\]\( \r\n]+)/',
+            array($this, 'fix_table_names_callback'),
+            $sql
+        );
+
+        return $sql;
+    }
+}