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134 lines
4.0 KiB
PHP
134 lines
4.0 KiB
PHP
<?php
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/**
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+-----------------------------------------------------------------------+
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 2005-2012, The Roundcube Dev Team |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| PURPOSE: |
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| Database wrapper class that implements PHP PDO functions |
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| for PostgreSQL database |
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+-----------------------------------------------------------------------+
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| Author: Aleksander Machniak <alec@alec.pl> |
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+-----------------------------------------------------------------------+
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*/
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/**
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* Database independent query interface
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* This is a wrapper for the PHP PDO
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*
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* @package Framework
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* @subpackage Database
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*/
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class rcube_db_pgsql extends rcube_db
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{
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public $db_provider = 'postgres';
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/**
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* Get last inserted record ID
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*
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* @param string $table Table name (to find the incremented sequence)
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*
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* @return mixed ID or false on failure
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*/
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public function insert_id($table = null)
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{
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if (!$this->db_connected || $this->db_mode == 'r') {
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return false;
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}
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if ($table) {
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$table = $this->sequence_name($table);
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}
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$id = $this->dbh->lastInsertId($table);
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return $id;
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}
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/**
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* Return correct name for a specific database sequence
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*
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* @param string $table Table name
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*
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* @return string Translated sequence name
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*/
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protected function sequence_name($table)
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{
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// Note: we support only one sequence per table
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// Note: The sequence name must be <table_name>_seq
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$sequence = $table . '_seq';
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$rcube = rcube::get_instance();
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// return sequence name if configured
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if ($prefix = $rcube->config->get('db_prefix')) {
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return $prefix . $sequence;
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}
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return $sequence;
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}
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/**
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* Return SQL statement to convert a field value into a unix timestamp
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*
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* This method is deprecated and should not be used anymore due to limitations
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* of timestamp functions in Mysql (year 2038 problem)
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*
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* @param string $field Field name
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*
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* @return string SQL statement to use in query
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* @deprecated
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*/
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public function unixtimestamp($field)
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{
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return "EXTRACT (EPOCH FROM $field)";
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}
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/**
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* Return SQL statement for case insensitive LIKE
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*
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* @param string $column Field name
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* @param string $value Search value
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*
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* @return string SQL statement to use in query
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*/
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public function ilike($column, $value)
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{
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return $this->quote_identifier($column) . ' ILIKE ' . $this->quote($value);
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}
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/**
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* Get database runtime variables
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*
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* @param string $varname Variable name
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* @param mixed $default Default value if variable is not set
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*
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* @return mixed Variable value or default
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*/
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public function get_variable($varname, $default = null)
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{
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// There's a known case when max_allowed_packet is queried
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// PostgreSQL doesn't have such limit, return immediately
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if ($varname == 'max_allowed_packet') {
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return $default;
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}
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if (!isset($this->variables)) {
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$this->variables = array();
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$result = $this->query('SHOW ALL');
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while ($row = $this->fetch_array($result)) {
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$this->variables[$row[0]] = $row[1];
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}
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}
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return isset($this->variables[$varname]) ? $this->variables[$varname] : $default;
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}
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}
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