504 lines
15 KiB
PHP
504 lines
15 KiB
PHP
<?php
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// phpcs:disable PSR1.Classes.ClassDeclaration.MissingNamespace
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// phpcs:disable PSR1.Classes.ClassDeclaration.MultipleClasses
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// phpcs:disable PSR1.Files.SideEffects
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defined('SYSPATH') or die('No direct access allowed.');
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// phpcs:enable PSR1.Files.SideEffects
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// phpcs:disable Squiz.Classes.ValidClassName.NotCamelCaps
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/**
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* PostgreSQL 8.1+ Database Driver
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*
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* $Id: Pgsql.php 4344 2009-05-11 16:41:39Z zombor $
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*
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* @package Core
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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class Database_Pgsql_Driver extends Database_Driver
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{
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// Database connection link
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protected $link;
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protected $db_config;
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/**
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* Sets the config for the class.
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*
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* @param array database configuration
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*/
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public function __construct($config)
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{
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$this->db_config = $config;
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Kohana::log('debug', 'PgSQL Database Driver Initialized');
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}
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public function connect()
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{
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// Check if link already exists
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if (is_resource($this->link)) {
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return $this->link;
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}
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// Import the connect variables
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extract($this->db_config['connection']);
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// Persistent connections enabled?
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$connect = ($this->db_config['persistent'] == true) ? 'pg_pconnect' : 'pg_connect';
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// Build the connection info
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$port = isset($port) ? 'port=\'' . $port . '\'' : '';
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$host = isset($host) ? 'host=\'' . $host . '\' ' . $port : ''; // if no host, connect with the socket
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$connection_string = $host . ' dbname=\'' . $database . '\' user=\'' . $user . '\' password=\'' . $pass . '\'';
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// Make the connection and select the database
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if ($this->link = $connect($connection_string)) {
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if ($charset = $this->db_config['character_set']) {
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echo $this->set_charset($charset);
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}
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// Clear password after successful connect
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$this->db_config['connection']['pass'] = null;
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return $this->link;
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}
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return false;
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}
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public function query($sql)
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{
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// Only cache if it's turned on, and only cache if it's not a write statement
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if ($this->db_config['cache'] and ! preg_match('#\b(?:INSERT|UPDATE|SET)\b#i', $sql)) {
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$hash = $this->query_hash($sql);
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if (! isset($this->query_cache[$hash])) {
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// Set the cached object
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$this->query_cache[$hash] = new Pgsql_Result(pg_query($this->link, $sql), $this->link, $this->db_config['object'], $sql);
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} else {
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// Rewind cached result
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$this->query_cache[$hash]->rewind();
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}
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return $this->query_cache[$hash];
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}
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// Suppress warning triggered when a database error occurs (e.g., a constraint violation)
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return new Pgsql_Result(@pg_query($this->link, $sql), $this->link, $this->db_config['object'], $sql);
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}
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public function set_charset($charset)
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{
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$this->query('SET client_encoding TO ' . pg_escape_string($this->link, $charset));
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}
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public function escape_table($table)
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{
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if (!$this->db_config['escape']) {
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return $table;
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}
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return '"' . str_replace('.', '"."', $table) . '"';
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}
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public function escape_column($column)
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{
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if (!$this->db_config['escape']) {
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return $column;
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}
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if ($column == '*') {
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return $column;
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}
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// This matches any functions we support to SELECT.
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if (preg_match('/(avg|count|sum|max|min)\(\s*(.*)\s*\)(\s*as\s*(.+)?)?/i', $column, $matches)) {
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if (count($matches) == 3) {
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return $matches[1] . '(' . $this->escape_column($matches[2]) . ')';
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} elseif (count($matches) == 5) {
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return $matches[1] . '(' . $this->escape_column($matches[2]) . ') AS ' . $this->escape_column($matches[2]);
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}
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}
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// This matches any modifiers we support to SELECT.
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if (! preg_match('/\b(?:all|distinct)\s/i', $column)) {
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if (stripos($column, ' AS ') !== false) {
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// Force 'AS' to uppercase
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$column = str_ireplace(' AS ', ' AS ', $column);
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// Runs escape_column on both sides of an AS statement
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$column = array_map(array($this, __FUNCTION__), explode(' AS ', $column));
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// Re-create the AS statement
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return implode(' AS ', $column);
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}
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return preg_replace('/[^.*]+/', '"$0"', $column);
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}
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$parts = explode(' ', $column);
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$column = '';
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for ($i = 0, $c = count($parts); $i < $c; $i++) {
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// The column is always last
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if ($i == ($c - 1)) {
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$column .= preg_replace('/[^.*]+/', '"$0"', $parts[$i]);
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} else // otherwise, it's a modifier
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{
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$column .= $parts[$i] . ' ';
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}
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}
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return $column;
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}
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public function regex($field, $match, $type, $num_regexs)
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{
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$prefix = ($num_regexs == 0) ? '' : $type;
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return $prefix . ' ' . $this->escape_column($field) . ' ~* \'' . $this->escape_str($match) . '\'';
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}
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public function notregex($field, $match, $type, $num_regexs)
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{
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$prefix = $num_regexs == 0 ? '' : $type;
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return $prefix . ' ' . $this->escape_column($field) . ' !~* \'' . $this->escape_str($match) . '\'';
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}
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public function limit($limit, $offset = 0)
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{
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return 'LIMIT ' . $limit . ' OFFSET ' . $offset;
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}
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public function compile_select($database)
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{
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$sql = ($database['distinct'] == true) ? 'SELECT DISTINCT ' : 'SELECT ';
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$sql .= (count($database['select']) > 0) ? implode(', ', $database['select']) : '*';
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if (count($database['from']) > 0) {
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$sql .= "\nFROM ";
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$sql .= implode(', ', $database['from']);
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}
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if (count($database['join']) > 0) {
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foreach ($database['join'] as $join) {
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$sql .= "\n" . $join['type'] . 'JOIN ' . implode(', ', $join['tables']) . ' ON ' . $join['conditions'];
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}
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}
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if (count($database['where']) > 0) {
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$sql .= "\nWHERE ";
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}
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$sql .= implode("\n", $database['where']);
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if (count($database['groupby']) > 0) {
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$sql .= "\nGROUP BY ";
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$sql .= implode(', ', $database['groupby']);
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}
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if (count($database['having']) > 0) {
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$sql .= "\nHAVING ";
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$sql .= implode("\n", $database['having']);
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}
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if (count($database['orderby']) > 0) {
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$sql .= "\nORDER BY ";
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$sql .= implode(', ', $database['orderby']);
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}
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if (is_numeric($database['limit'])) {
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$sql .= "\n";
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$sql .= $this->limit($database['limit'], $database['offset']);
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}
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return $sql;
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}
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public function escape_str($str)
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{
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if (!$this->db_config['escape']) {
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return $str;
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}
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is_resource($this->link) or $this->connect();
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return pg_escape_string($this->link, $str);
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}
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public function list_tables()
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{
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$sql = 'SELECT table_schema || \'.\' || table_name FROM information_schema.tables WHERE table_schema NOT IN (\'pg_catalog\', \'information_schema\')';
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$result = $this->query($sql)->result(false, PGSQL_ASSOC);
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$retval = array();
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foreach ($result as $row) {
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$retval[] = current($row);
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}
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return $retval;
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}
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public function show_error()
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{
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return pg_last_error($this->link);
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}
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public function list_fields($table)
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{
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$result = null;
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foreach ($this->field_data($table) as $row) {
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// Make an associative array
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$result[$row->column_name] = $this->sql_type($row->data_type);
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if (!strncmp($row->column_default, 'nextval(', 8)) {
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$result[$row->column_name]['sequenced'] = true;
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}
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if ($row->is_nullable === 'YES') {
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$result[$row->column_name]['null'] = true;
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}
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}
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if (!isset($result)) {
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throw new Kohana_Database_Exception('database.table_not_found', $table);
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}
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return $result;
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}
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public function field_data($table)
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{
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// http://www.postgresql.org/docs/8.3/static/infoschema-columns.html
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$result = $this->query('
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SELECT column_name, column_default, is_nullable, data_type, udt_name,
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character_maximum_length, numeric_precision, numeric_precision_radix, numeric_scale
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FROM information_schema.columns
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WHERE table_name = \'' . $this->escape_str($table) . '\'
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ORDER BY ordinal_position
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');
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return $result->result_array(true);
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}
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}
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// End Database_Pgsql_Driver Class
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/**
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* PostgreSQL Result
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*/
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class Pgsql_Result extends Database_Result
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{
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// Data fetching types
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protected $fetch_type = 'pgsql_fetch_object';
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protected $return_type = PGSQL_ASSOC;
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/**
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* Sets up the result variables.
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*
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* @param resource query result
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* @param resource database link
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* @param boolean return objects or arrays
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* @param string SQL query that was run
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*/
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public function __construct($result, $link, $object = true, $sql = '')
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{
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$this->link = $link;
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$this->result = $result;
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// If the query is a resource, it was a SELECT, SHOW, DESCRIBE, EXPLAIN query
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if (is_resource($result)) {
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// Its an DELETE, INSERT, REPLACE, or UPDATE query
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if (preg_match('/^(?:delete|insert|replace|update)\b/iD', trim($sql), $matches)) {
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$this->insert_id = (strtolower($matches[0]) == 'insert') ? $this->insert_id() : false;
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$this->total_rows = pg_affected_rows($this->result);
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} else {
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$this->current_row = 0;
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$this->total_rows = pg_num_rows($this->result);
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$this->fetch_type = ($object === true) ? 'pg_fetch_object' : 'pg_fetch_array';
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}
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} else {
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throw new Kohana_Database_Exception('database.error', pg_last_error() . ' - ' . $sql);
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}
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// Set result type
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$this->result($object);
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// Store the SQL
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$this->sql = $sql;
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}
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/**
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* Magic __destruct function, frees the result.
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*/
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public function __destruct()
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{
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if (is_resource($this->result)) {
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pg_free_result($this->result);
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}
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}
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public function result($object = true, $type = PGSQL_ASSOC)
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{
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$this->fetch_type = ((bool) $object) ? 'pg_fetch_object' : 'pg_fetch_array';
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// This check has to be outside the previous statement, because we do not
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// know the state of fetch_type when $object = NULL
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// NOTE - The class set by $type must be defined before fetching the result,
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// autoloading is disabled to save a lot of stupid overhead.
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if ($this->fetch_type == 'pg_fetch_object') {
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$this->return_type = (is_string($type) and Kohana::auto_load($type)) ? $type : 'stdClass';
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} else {
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$this->return_type = $type;
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}
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return $this;
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}
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public function as_array($object = null, $type = PGSQL_ASSOC)
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{
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return $this->result_array($object, $type);
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}
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public function result_array($object = null, $type = PGSQL_ASSOC)
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{
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$rows = array();
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if (is_string($object)) {
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$fetch = $object;
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} elseif (is_bool($object)) {
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if ($object === true) {
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$fetch = 'pg_fetch_object';
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// NOTE - The class set by $type must be defined before fetching the result,
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// autoloading is disabled to save a lot of stupid overhead.
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$type = (is_string($type) and Kohana::auto_load($type)) ? $type : 'stdClass';
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} else {
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$fetch = 'pg_fetch_array';
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}
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} else {
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// Use the default config values
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$fetch = $this->fetch_type;
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if ($fetch == 'pg_fetch_object') {
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$type = (is_string($type) and Kohana::auto_load($type)) ? $type : 'stdClass';
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}
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}
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if ($this->total_rows) {
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pg_result_seek($this->result, 0);
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while ($row = $fetch($this->result, null, $type)) {
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$rows[] = $row;
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}
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}
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return $rows;
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}
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public function insert_id()
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{
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if ($this->insert_id === null) {
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$query = 'SELECT LASTVAL() AS insert_id';
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// Disable error reporting for this, just to silence errors on
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// tables that have no serial column.
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$ER = error_reporting(0);
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$result = pg_query($this->link, $query);
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$insert_id = pg_fetch_array($result, null, PGSQL_ASSOC);
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$this->insert_id = $insert_id['insert_id'];
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// Reset error reporting
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error_reporting($ER);
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}
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return $this->insert_id;
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}
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public function seek($offset)
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{
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if ($this->offsetExists($offset) and pg_result_seek($this->result, $offset)) {
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// Set the current row to the offset
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$this->current_row = $offset;
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return true;
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}
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return false;
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}
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public function list_fields()
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{
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$field_names = array();
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$fields = pg_num_fields($this->result);
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for ($i = 0; $i < $fields; ++$i) {
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$field_names[] = pg_field_name($this->result, $i);
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}
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return $field_names;
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}
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/**
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* ArrayAccess: offsetGet
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*/
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public function offsetGet($offset)
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{
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if (! $this->seek($offset)) {
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return false;
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}
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// Return the row by calling the defined fetching callback
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$fetch = $this->fetch_type;
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return $fetch($this->result, null, $this->return_type);
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}
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}
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// End Pgsql_Result Class
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/**
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* PostgreSQL Prepared Statement (experimental)
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*/
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class Kohana_Pgsql_Statement
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{
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protected $link = null;
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protected $stmt;
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public function __construct($sql, $link)
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{
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$this->link = $link;
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$this->stmt = $this->link->prepare($sql);
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return $this;
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}
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public function __destruct()
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{
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$this->stmt->close();
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}
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// Sets the bind parameters
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public function bind_params()
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{
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$argv = func_get_args();
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return $this;
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}
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// sets the statement values to the bound parameters
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public function set_vals()
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{
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return $this;
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}
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// Runs the statement
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public function execute()
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{
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return $this;
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}
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}
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