--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/lib/Roundcube/rcube_db_pgsql.php	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,249 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2017, 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 PostgreSQL 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_pgsql extends rcube_db
+{
+    public $db_provider = 'postgres';
+
+    /**
+     * 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);
+
+        // use date/time input format with timezone spec.
+        $this->options['datetime_format'] = 'c';
+    }
+
+    /**
+     * 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("SET NAMES 'utf8'");
+        $dbh->query("SET DATESTYLE TO ISO");
+    }
+
+    /**
+     * 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 || $this->db_mode == 'r') {
+            return false;
+        }
+
+        if ($table) {
+            $table = $this->sequence_name($table);
+        }
+
+        $id = $this->dbh->lastInsertId($table);
+
+        return $id;
+    }
+
+    /**
+     * 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 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 "EXTRACT (EPOCH FROM $field)";
+    }
+
+    /**
+     * 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) {
+            $add = ' ' . ($interval > 0 ? '+' : '-') . " interval '";
+            $add .= $interval > 0 ? intval($interval) : intval($interval) * -1;
+            $add .= " seconds'";
+        }
+
+        return "now()" . $add;
+    }
+
+    /**
+     * 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 $this->quote_identifier($column) . ' ILIKE ' . $this->quote($value);
+    }
+
+    /**
+     * Get database runtime variables
+     *
+     * @param string $varname Variable name
+     * @param mixed  $default Default value if variable is not set
+     *
+     * @return mixed Variable value or default
+     */
+    public function get_variable($varname, $default = null)
+    {
+        // There's a known case when max_allowed_packet is queried
+        // PostgreSQL doesn't have such limit, return immediately
+        if ($varname == 'max_allowed_packet') {
+            return rcube::get_instance()->config->get('db_' . $varname, $default);
+        }
+
+        $this->variables[$varname] = rcube::get_instance()->config->get('db_' . $varname);
+
+        if (!isset($this->variables)) {
+            $this->variables = array();
+
+            $result = $this->query('SHOW ALL');
+
+            while ($row = $this->fetch_array($result)) {
+                $this->variables[$row[0]] = $row[1];
+            }
+        }
+
+        return isset($this->variables[$varname]) ? $this->variables[$varname] : $default;
+    }
+
+    /**
+     * Returns list of tables in a database
+     *
+     * @return array List of all tables of the current database
+     */
+    public function list_tables()
+    {
+        // get tables if not cached
+        if ($this->tables === null) {
+            $q = $this->query("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES"
+                . " WHERE TABLE_TYPE = 'BASE TABLE' AND TABLE_SCHEMA NOT IN ('pg_catalog', 'information_schema')"
+                . " ORDER BY TABLE_NAME");
+
+            $this->tables = $q ? $q->fetchAll(PDO::FETCH_COLUMN, 0) : array();
+        }
+
+        return $this->tables;
+    }
+
+    /**
+     * Returns PDO DSN string from DSN array
+     *
+     * @param array $dsn DSN parameters
+     *
+     * @return string DSN string
+     */
+    protected function dsn_string($dsn)
+    {
+        $params = array();
+        $result = 'pgsql:';
+
+        if ($dsn['hostspec']) {
+            $params[] = 'host=' . $dsn['hostspec'];
+        }
+        else if ($dsn['socket']) {
+            $params[] = 'host=' . $dsn['socket'];
+        }
+
+        if ($dsn['port']) {
+            $params[] = 'port=' . $dsn['port'];
+        }
+
+        if ($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;
+        }
+
+        $sql = parent::fix_table_names($sql);
+
+        // replace sequence names, and other postgres-specific commands
+        $sql = preg_replace_callback(
+            '/((SEQUENCE |RENAME TO |nextval\()["\']*)([^"\' \r\n]+)/',
+            array($this, 'fix_table_names_callback'),
+            $sql
+        );
+
+        return $sql;
+    }
+}