mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
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94704a2518
git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@4851 3807eeeb-6ff5-0310-8944-8be069107fe0
624 lines
No EOL
16 KiB
PHP
624 lines
No EOL
16 KiB
PHP
<?php
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/* SVN FILE: $Id$ */
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/**
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* PostgreSQL layer for DBO.
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*
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* Long description for file
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
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* Copyright 2005-2007, Cake Software Foundation, Inc.
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* 1785 E. Sahara Avenue, Suite 490-204
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* Las Vegas, Nevada 89104
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @filesource
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* @copyright Copyright 2005-2007, Cake Software Foundation, Inc.
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* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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* @since CakePHP(tm) v 0.9.1.114
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* @version $Revision$
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* @modifiedby $LastChangedBy$
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* @lastmodified $Date$
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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*/
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/**
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* PostgreSQL layer for DBO.
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*
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* Long description for class
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*
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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*/
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class DboPostgres extends DboSource {
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var $description = "PostgreSQL DBO Driver";
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var $_baseConfig = array(
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'connect' => 'pg_pconnect',
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'persistent' => true,
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'host' => 'localhost',
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'login' => 'root',
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'password' => '',
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'database' => 'cake',
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'port' => 5432,
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'encoding' => ''
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);
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var $columns = array(
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'primary_key' => array('name' => 'serial NOT NULL'),
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'string' => array('name' => 'varchar', 'limit' => '255'),
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'text' => array('name' => 'text'),
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'integer' => array('name' => 'integer', 'formatter' => 'intval'),
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'float' => array('name' => 'float', 'formatter' => 'floatval'),
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'datetime' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
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'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
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'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'),
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'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),
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'binary' => array('name' => 'bytea'),
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'boolean' => array('name' => 'boolean'),
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'number' => array('name' => 'numeric'),
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'inet' => array('name' => 'inet')
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);
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var $startQuote = '"';
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var $endQuote = '"';
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/**
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* Connects to the database using options in the given configuration array.
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*
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* @return True if successfully connected.
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*/
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function connect() {
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$config = $this->config;
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$connect = $config['connect'];
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$this->connection = $connect("host='{$config['host']}' port='{$config['port']}' dbname='{$config['database']}' user='{$config['login']}' password='{$config['password']}'");
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if ($this->connection) {
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$this->connected = true;
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} else {
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$this->connected = false;
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}
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if (!empty($config['encoding'])) {
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$this->setEncoding($config['encoding']);
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}
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return $this->connected;
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}
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/**
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* Disconnects from database.
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*
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* @return boolean True if the database could be disconnected, else false
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*/
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function disconnect() {
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$this->connected = !@pg_close($this->connection);
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return !$this->connected;
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}
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/**
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* Executes given SQL statement.
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*
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* @param string $sql SQL statement
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* @return resource Result resource identifier
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*/
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function _execute($sql) {
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return pg_query($this->connection, $sql);
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}
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/**
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* Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
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*
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* @return array Array of tablenames in the database
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*/
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function listSources() {
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$cache = parent::listSources();
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if ($cache != null) {
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return $cache;
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}
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$sql = "SELECT table_name as name FROM INFORMATION_SCHEMA.tables WHERE table_schema = 'public';";
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$result = $this->fetchAll($sql);
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if (!$result) {
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return array();
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} else {
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$tables = array();
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foreach($result as $item) {
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$tables[] = $item[0]['name'];
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}
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parent::listSources($tables);
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return $tables;
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}
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}
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/**
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* Returns an array of the fields in given table name.
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*
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* @param string $tableName Name of database table to inspect
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* @return array Fields in table. Keys are name and type
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*/
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function &describe(&$model) {
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$cache = parent::describe($model);
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if ($cache != null) {
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return $cache;
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}
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$fields = false;
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$cols = $this->fetchAll("SELECT DISTINCT column_name AS name, data_type AS type, is_nullable AS null, column_default AS default, ordinal_position AS position, character_maximum_length AS char_length, character_octet_length AS oct_length FROM information_schema.columns WHERE table_name =" . $this->value($model->tablePrefix . $model->table) . " ORDER BY position");
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foreach($cols as $column) {
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$colKey = array_keys($column);
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if (isset($column[$colKey[0]]) && !isset($column[0])) {
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$column[0] = $column[$colKey[0]];
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}
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if (isset($column[0])) {
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$c = $column[0];
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if (strpos($c['default'], 'nextval(') === 0) {
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$c['default'] = null;
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}
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if (!empty($c['char_length'])) {
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$length = intval($c['char_length']);
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} elseif (!empty($c['oct_length'])) {
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$length = intval($c['oct_length']);
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} else {
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$length = $this->length($c['type']);
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}
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$fields[] = array(
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'name' => $c['name'],
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'type' => $this->column($c['type']),
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'null' => ($c['null'] == 'NO' ? false : true),
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'default' => $c['default'],
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'length' => $length
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);
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}
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}
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$this->__cacheDescription($model->tablePrefix . $model->table, $fields);
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return $fields;
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}
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/**
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* Returns a quoted and escaped string of $data for use in an SQL statement.
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*
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* @param string $data String to be prepared for use in an SQL statement
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* @param string $column The column into which this data will be inserted
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* @return string Quoted and escaped
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* @todo Add logic that formats/escapes data based on column type
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*/
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function value($data, $column = null) {
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$parent = parent::value($data, $column);
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if ($parent != null) {
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return $parent;
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}
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if ($data === null) {
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return 'NULL';
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}
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switch($column) {
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case 'inet':
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if (!strlen($data)){
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return 'DEFAULT';
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} else {
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$data = pg_escape_string($data);
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}
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break;
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case 'integer':
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if ($data === '') {
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return 'DEFAULT';
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} else {
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$data = pg_escape_string($data);
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}
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break;
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case 'binary':
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$data = pg_escape_bytea($data);
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break;
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case 'boolean':
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$data = $this->boolean((bool)$data);
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if ($data === true) {
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$data = '1';
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} elseif ($data === false) {
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$data = '0';
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}
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break;
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default:
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$data = pg_escape_string($data);
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break;
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}
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return "'" . $data . "'";
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}
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/**
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* Begin a transaction
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*
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* @param unknown_type $model
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* @return boolean True on success, false on fail
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* (i.e. if the database/model does not support transactions).
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*/
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function begin(&$model) {
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if (parent::begin($model)) {
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if ($this->execute('BEGIN')) {
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$this->_transactionStarted = true;
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return true;
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}
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}
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return false;
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}
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/**
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* Commit a transaction
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*
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* @param unknown_type $model
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* @return boolean True on success, false on fail
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* (i.e. if the database/model does not support transactions,
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* or a transaction has not started).
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*/
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function commit(&$model) {
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if (parent::commit($model)) {
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$this->_transactionStarted = false;
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return $this->execute('COMMIT');
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}
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return false;
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}
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/**
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* Rollback a transaction
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*
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* @param unknown_type $model
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* @return boolean True on success, false on fail
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* (i.e. if the database/model does not support transactions,
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* or a transaction has not started).
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*/
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function rollback(&$model) {
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if (parent::rollback($model)) {
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return $this->execute('ROLLBACK');
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}
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return false;
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}
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/**
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* Returns a formatted error message from previous database operation.
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*
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* @return string Error message
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*/
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function lastError() {
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$last_error = pg_last_error($this->connection);
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if ($last_error) {
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return $last_error;
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}
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return null;
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}
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/**
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* Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
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*
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* @return int Number of affected rows
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*/
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function lastAffected() {
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if ($this->_result) {
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$return = pg_affected_rows($this->_result);
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return $return;
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}
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return false;
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}
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/**
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* Returns number of rows in previous resultset. If no previous resultset exists,
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* this returns false.
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*
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* @return int Number of rows in resultset
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*/
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function lastNumRows() {
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if ($this->_result) {
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$return = pg_num_rows($this->_result);
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return $return;
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}
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return false;
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}
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/**
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* Returns the ID generated from the previous INSERT operation.
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*
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* @param string $source Name of the database table
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* @param string $field Name of the ID database field. Defaults to "id"
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* @return int
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*/
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function lastInsertId($source, $field = 'id') {
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foreach ($this->__descriptions[$source] as $sourceinfo) {
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if (strcasecmp($sourceinfo['name'], $field) == 0) {
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break;
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}
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}
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if (preg_match('/^nextval\(\'(\w+)\'/', $sourceinfo['default'], $matches)) {
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$seq = $matches[1];
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} else {
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$seq = "{$source}_{$field}_seq";
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}
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$res = $this->rawQuery("SELECT last_value AS max FROM \"{$seq}\"");
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$data = $this->fetchRow($res);
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return $data[0]['max'];
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}
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/**
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* Generates the fields list of an SQL query.
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*
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* @param Model $model
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* @param string $alias Alias tablename
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* @param mixed $fields
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* @return array
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*/
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function fields(&$model, $alias = null, $fields = array(), $quote = true) {
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if (empty($alias)) {
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$alias = $model->name;
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}
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$fields = parent::fields($model, $alias, $fields, false);
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if (!$quote) {
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return $fields;
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}
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$count = count($fields);
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if ($count >= 1 && $fields[0] != '*' && strpos($fields[0], 'COUNT(*)') === false) {
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for($i = 0; $i < $count; $i++) {
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if (!preg_match('/^.+\\(.*\\)/', $fields[$i]) && !preg_match('/\s+AS\s+/', $fields[$i])) {
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$prepend = '';
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if (strpos($fields[$i], 'DISTINCT') !== false) {
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$prepend = 'DISTINCT ';
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$fields[$i] = trim(r('DISTINCT', '', $fields[$i]));
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}
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$dot = strrpos($fields[$i], '.');
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if ($dot === false) {
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$fields[$i] = $prepend . $this->name($alias) . '.' . $this->name($fields[$i]) . ' AS ' . $this->name($alias . '__' . $fields[$i]);
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} else {
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$build = explode('.', $fields[$i]);
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$fields[$i] = $prepend . $this->name($build[0]) . '.' . $this->name($build[1]) . ' AS ' . $this->name($build[0] . '__' . $build[1]);
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}
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}
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}
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}
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return $fields;
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}
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/**
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* Returns a limit statement in the correct format for the particular database.
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*
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* @param int $limit Limit of results returned
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* @param int $offset Offset from which to start results
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* @return string SQL limit/offset statement
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*/
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function limit($limit, $offset = null) {
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if ($limit) {
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$rt = '';
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if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
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$rt = ' LIMIT';
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}
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$rt .= ' ' . $limit;
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if ($offset) {
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$rt .= ' OFFSET ' . $offset;
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}
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return $rt;
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}
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return null;
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}
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/**
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* Converts database-layer column types to basic types
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*
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* @param string $real Real database-layer column type (i.e. "varchar(255)")
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* @return string Abstract column type (i.e. "string")
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*/
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function column($real) {
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if (is_array($real)) {
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$col = $real['name'];
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if (isset($real['limit'])) {
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$col .= '(' . $real['limit'] . ')';
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}
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return $col;
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}
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$col = r(')', '', $real);
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$limit = null;
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@list($col, $limit) = explode('(', $col);
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if (in_array($col, array('date', 'time'))) {
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return $col;
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}
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if (strpos($col, 'timestamp') !== false) {
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return 'datetime';
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}
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if ($col == 'inet') {
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return('inet');
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}
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if ($col == 'boolean') {
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return 'boolean';
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}
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if (strpos($col, 'int') !== false && $col != 'interval') {
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return 'integer';
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}
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if (strpos($col, 'char') !== false) {
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return 'string';
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}
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if (strpos($col, 'text') !== false) {
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return 'text';
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}
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if (strpos($col, 'bytea') !== false) {
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return 'binary';
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}
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if (in_array($col, array('float', 'float4', 'float8', 'double', 'double precision', 'decimal', 'real', 'numeric'))) {
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return 'float';
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}
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return 'text';
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}
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/**
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* Gets the length of a database-native column description, or null if no length
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*
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* @param string $real Real database-layer column type (i.e. "varchar(255)")
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* @return int An integer representing the length of the column
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*/
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function length($real) {
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$col = r(array(')', 'unsigned'), '', $real);
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$limit = null;
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if (strpos($col, '(') !== false) {
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list($col, $limit) = explode('(', $col);
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}
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if ($limit != null) {
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return intval($limit);
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} elseif ($col == 'integer') {
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return 11;
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} elseif (in_array($col, array('int2', 'int4', 'int8'))) {
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return intval(r('int', '', $col));
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}
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return null;
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}
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/**
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* Enter description here...
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*
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* @param unknown_type $results
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*/
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function resultSet(&$results) {
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$this->results =& $results;
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$this->map = array();
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$num_fields = pg_num_fields($results);
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$index = 0;
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$j = 0;
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while($j < $num_fields) {
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$columnName = pg_field_name($results, $j);
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if (strpos($columnName, '__')) {
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$parts = explode('__', $columnName);
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$this->map[$index++] = array($parts[0], $parts[1]);
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} else {
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$this->map[$index++] = array(0, $columnName);
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}
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$j++;
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}
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}
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/**
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* Fetches the next row from the current result set
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*
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* @return unknown
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*/
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function fetchResult() {
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if ($row = pg_fetch_row($this->results)) {
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$resultRow = array();
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$i = 0;
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foreach($row as $index => $field) {
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list($table, $column) = $this->map[$index];
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$resultRow[$table][$column] = $row[$index];
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$i++;
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}
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return $resultRow;
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} else {
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return false;
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}
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}
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/**
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* Translates between PHP boolean values and PostgreSQL boolean values
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*
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* @param mixed $data Value to be translated
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* @return mixed Converted boolean value
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*/
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function boolean($data) {
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if ($data === true || $data === false) {
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return $data;
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} elseif (is_string($data) && !is_numeric($data)) {
|
|
if (strpos($data, 't') !== false) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
} else {
|
|
return (bool)$data;
|
|
}
|
|
}
|
|
/**
|
|
* Sets the database encoding
|
|
*
|
|
* @param mixed $enc Database encoding
|
|
* @return boolean True on success, false on failure
|
|
*/
|
|
function setEncoding($enc) {
|
|
return pg_set_client_encoding($this->connection, $enc) == 0;
|
|
}
|
|
/**
|
|
* Gets the database encoding
|
|
*
|
|
* @return string The database encoding
|
|
*/
|
|
function getEncoding() {
|
|
return pg_client_encoding($this->connection);
|
|
}
|
|
/**
|
|
* Generate a PostgreSQL-native column schema string
|
|
*
|
|
* @param array $column An array structured like the following: array('name', 'type'[, options]),
|
|
* where options can be 'default', 'length', or 'key'.
|
|
* @return string
|
|
*/
|
|
function generateColumnSchema($column) {
|
|
$name = $type = $out = null;
|
|
$column = am(array('null' => true), $column);
|
|
list($name, $type) = $column;
|
|
|
|
if (empty($name) || empty($type)) {
|
|
trigger_error('Column name or type not defined in schema', E_USER_WARNING);
|
|
return null;
|
|
}
|
|
if (!isset($this->columns[$type])) {
|
|
trigger_error("Column type {$type} does not exist", E_USER_WARNING);
|
|
return null;
|
|
}
|
|
$out = "\t" . $this->name($name) . ' ';
|
|
|
|
if (!isset($column['key']) || $column['key'] != 'primary') {
|
|
$real = $this->columns[$type];
|
|
$out .= $real['name'];
|
|
|
|
if (isset($real['limit']) || isset($real['length']) || isset($column['limit']) || isset($column['length'])) {
|
|
if (isset($column['length'])) {
|
|
$length = $column['length'];
|
|
} elseif (isset($column['limit'])) {
|
|
$length = $column['limit'];
|
|
} elseif (isset($real['length'])) {
|
|
$length = $real['length'];
|
|
} else {
|
|
$length = $real['limit'];
|
|
}
|
|
$out .= '(' . $length . ')';
|
|
}
|
|
}
|
|
|
|
if (isset($column['key']) && $column['key'] == 'primary') {
|
|
$out .= $this->columns['primary_key']['name'];
|
|
} elseif (isset($column['default'])) {
|
|
$out .= ' DEFAULT ' . $this->value($column['default'], $type);
|
|
} elseif (isset($column['null']) && $column['null'] == true) {
|
|
$out .= ' DEFAULT NULL';
|
|
} elseif (isset($column['default']) && isset($column['null']) && $column['null'] == false) {
|
|
$out .= ' DEFAULT ' . $this->value($column['default'], $type) . ' NOT NULL';
|
|
} elseif (isset($column['null']) && $column['null'] == false) {
|
|
$out .= ' NOT NULL';
|
|
}
|
|
return $out;
|
|
}
|
|
}
|
|
|
|
?>
|