www.gusucode.com > FavShop网店系统源码程序 > FavShop网店系统 1.0/upload/cake/libs/model/datasources/dbo/dbo_postgres.php
<?php
/* SVN FILE: $Id: dbo_postgres.php 6311 2008-01-02 06:33:52Z phpnut $ */
/**
* PostgreSQL layer for DBO.
*
* Long description for file
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
* Copyright 2005-2008, Cake Software Foundation, Inc.
* 1785 E. Sahara Avenue, Suite 490-204
* Las Vegas, Nevada 89104
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2008, Cake Software Foundation, Inc.
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.model.datasources.dbo
* @since CakePHP(tm) v 0.9.1.114
* @version $Revision: 6311 $
* @modifiedby $LastChangedBy: phpnut $
* @lastmodified $Date: 2008-01-02 00:33:52 -0600 (Wed, 02 Jan 2008) $
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* PostgreSQL layer for DBO.
*
* Long description for class
*
* @package cake
* @subpackage cake.cake.libs.model.datasources.dbo
*/
class DboPostgres extends DboSource {
var $description = "PostgreSQL DBO Driver";
var $_baseConfig = array(
'connect' => 'pg_pconnect',
'persistent' => true,
'host' => 'localhost',
'login' => 'root',
'password' => '',
'database' => 'cake',
'schema' => 'public',
'port' => 5432,
'encoding' => ''
);
var $columns = array(
'primary_key' => array('name' => 'serial NOT NULL'),
'string' => array('name' => 'varchar', 'limit' => '255'),
'text' => array('name' => 'text'),
'integer' => array('name' => 'integer', 'formatter' => 'intval'),
'float' => array('name' => 'float', 'formatter' => 'floatval'),
'datetime' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'),
'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),
'binary' => array('name' => 'bytea'),
'boolean' => array('name' => 'boolean'),
'number' => array('name' => 'numeric'),
'inet' => array('name' => 'inet')
);
var $startQuote = '"';
var $endQuote = '"';
/**
* Contains mappings of custom auto-increment sequences, if a table uses a sequence name
* other than what is dictated by convention.
*
* @var array
*/
var $_sequenceMap = array();
/**
* Connects to the database using options in the given configuration array.
*
* @return True if successfully connected.
*/
function connect() {
$config = $this->config;
$connect = $config['connect'];
$this->connection = $connect("host='{$config['host']}' port='{$config['port']}' dbname='{$config['database']}' user='{$config['login']}' password='{$config['password']}'");
if ($this->connection) {
$this->connected = true;
$this->_execute("SET search_path TO " . $config['schema']);
} else {
$this->connected = false;
}
if (!empty($config['encoding'])) {
$this->setEncoding($config['encoding']);
}
return $this->connected;
}
/**
* Disconnects from database.
*
* @return boolean True if the database could be disconnected, else false
*/
function disconnect() {
@pg_free_result($this->results);
$this->connected = !@pg_close($this->connection);
return !$this->connected;
}
/**
* Executes given SQL statement.
*
* @param string $sql SQL statement
* @return resource Result resource identifier
*/
function _execute($sql) {
return pg_query($this->connection, $sql);
}
/**
* Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
*
* @return array Array of tablenames in the database
*/
function listSources() {
$cache = parent::listSources();
if ($cache != null) {
return $cache;
}
$schema = $this->config['schema'];
$sql = "SELECT table_name as name FROM INFORMATION_SCHEMA.tables WHERE table_schema = '{$schema}';";
$result = $this->fetchAll($sql);
if (!$result) {
return array();
} else {
$tables = array();
foreach ($result as $item) {
$tables[] = $item[0]['name'];
}
parent::listSources($tables);
return $tables;
}
}
/**
* Returns an array of the fields in given table name.
*
* @param string $tableName Name of database table to inspect
* @return array Fields in table. Keys are name and type
*/
function &describe(&$model) {
if (isset($model->sequence)) {
$this->_sequenceMap[$this->fullTableName($model, false)] = $model->sequence;
}
$cache = parent::describe($model);
if ($cache != null) {
return $cache;
}
$fields = false;
$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 . $model->table) . " ORDER BY position");
foreach ($cols as $column) {
$colKey = array_keys($column);
if (isset($column[$colKey[0]]) && !isset($column[0])) {
$column[0] = $column[$colKey[0]];
}
if (isset($column[0])) {
$c = $column[0];
if (strpos($c['default'], 'nextval(') === 0) {
$c['default'] = null;
}
if (!empty($c['char_length'])) {
$length = intval($c['char_length']);
} elseif (!empty($c['oct_length'])) {
$length = intval($c['oct_length']);
} else {
$length = $this->length($c['type']);
}
$fields[$c['name']] = array(
'type' => $this->column($c['type']),
'null' => ($c['null'] == 'NO' ? false : true),
'default' => $c['default'],
'length' => $length
);
}
}
$this->__cacheDescription($model->tablePrefix . $model->table, $fields);
return $fields;
}
/**
* Returns a quoted and escaped string of $data for use in an SQL statement.
*
* @param string $data String to be prepared for use in an SQL statement
* @param string $column The column into which this data will be inserted
* @return string Quoted and escaped
* @todo Add logic that formats/escapes data based on column type
*/
function value($data, $column = null) {
$parent = parent::value($data, $column);
if ($parent != null) {
return $parent;
}
if ($data === null) {
return 'NULL';
}
switch($column) {
case 'inet':
if (!strlen($data)) {
return 'DEFAULT';
} else {
$data = pg_escape_string($data);
}
break;
case 'integer':
if ($data === '') {
return 'DEFAULT';
} else {
$data = pg_escape_string($data);
}
break;
case 'binary':
$data = pg_escape_bytea($data);
break;
case 'boolean':
default:
if ($data === true) {
return 'TRUE';
} elseif ($data === false) {
return 'FALSE';
}
$data = pg_escape_string($data);
break;
}
return "'" . $data . "'";
}
/**
* Begin a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions).
*/
function begin(&$model) {
if (parent::begin($model)) {
if ($this->execute('BEGIN')) {
$this->_transactionStarted = true;
return true;
}
}
return false;
}
/**
* Commit a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions,
* or a transaction has not started).
*/
function commit(&$model) {
if (parent::commit($model)) {
$this->_transactionStarted = false;
return $this->execute('COMMIT');
}
return false;
}
/**
* Rollback a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions,
* or a transaction has not started).
*/
function rollback(&$model) {
if (parent::rollback($model)) {
return $this->execute('ROLLBACK');
}
return false;
}
/**
* Returns a formatted error message from previous database operation.
*
* @return string Error message
*/
function lastError() {
$last_error = pg_last_error($this->connection);
if ($last_error) {
return $last_error;
}
return null;
}
/**
* Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
*
* @return integer Number of affected rows
*/
function lastAffected() {
if ($this->_result) {
$return = pg_affected_rows($this->_result);
return $return;
}
return false;
}
/**
* Returns number of rows in previous resultset. If no previous resultset exists,
* this returns false.
*
* @return integer Number of rows in resultset
*/
function lastNumRows() {
if ($this->_result) {
$return = pg_num_rows($this->_result);
return $return;
}
return false;
}
/**
* Returns the ID generated from the previous INSERT operation.
*
* @param string $source Name of the database table
* @param string $field Name of the ID database field. Defaults to "id"
* @return integer
*/
function lastInsertId($source, $field = 'id') {
foreach ($this->__descriptions[$source] as $name => $sourceinfo) {
if (strcasecmp($name, $field) == 0) {
break;
}
}
if (isset($this->_sequenceMap[$source])) {
$seq = $this->_sequenceMap[$source];
} elseif (preg_match('/^nextval\(\'(\w+)\'/', $sourceinfo['default'], $matches)) {
$seq = $matches[1];
} else {
$seq = "{$source}_{$field}_seq";
}
$res = $this->rawQuery("SELECT last_value AS max FROM \"{$seq}\"");
$data = $this->fetchRow($res);
return $data[0]['max'];
}
/**
* Generates the fields list of an SQL query.
*
* @param Model $model
* @param string $alias Alias tablename
* @param mixed $fields
* @return array
*/
function fields(&$model, $alias = null, $fields = array(), $quote = true) {
if (empty($alias)) {
$alias = $model->alias;
}
$fields = parent::fields($model, $alias, $fields, false);
if (!$quote) {
return $fields;
}
$count = count($fields);
if ($count >= 1 && $fields[0] != '*' && strpos($fields[0], 'COUNT(*)') === false) {
for ($i = 0; $i < $count; $i++) {
if (!preg_match('/^.+\\(.*\\)/', $fields[$i]) && !preg_match('/\s+AS\s+/', $fields[$i])) {
$prepend = '';
if (strpos($fields[$i], 'DISTINCT') !== false) {
$prepend = 'DISTINCT ';
$fields[$i] = trim(str_replace('DISTINCT', '', $fields[$i]));
}
$dot = strrpos($fields[$i], '.');
if ($dot === false) {
$fields[$i] = $prepend . $this->name($alias) . '.' . $this->name($fields[$i]) . ' AS ' . $this->name($alias . '__' . $fields[$i]);
} else {
$build = explode('.', $fields[$i]);
$fields[$i] = $prepend . $this->name($build[0]) . '.' . $this->name($build[1]) . ' AS ' . $this->name($build[0] . '__' . $build[1]);
}
}
}
}
return $fields;
}
/**
* Returns a limit statement in the correct format for the particular database.
*
* @param integer $limit Limit of results returned
* @param integer $offset Offset from which to start results
* @return string SQL limit/offset statement
*/
function limit($limit, $offset = null) {
if ($limit) {
$rt = '';
if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
$rt = ' LIMIT';
}
$rt .= ' ' . $limit;
if ($offset) {
$rt .= ' OFFSET ' . $offset;
}
return $rt;
}
return null;
}
/**
* Converts database-layer column types to basic types
*
* @param string $real Real database-layer column type (i.e. "varchar(255)")
* @return string Abstract column type (i.e. "string")
*/
function column($real) {
if (is_array($real)) {
$col = $real['name'];
if (isset($real['limit'])) {
$col .= '(' . $real['limit'] . ')';
}
return $col;
}
$col = str_replace(')', '', $real);
$limit = null;
@list($col, $limit) = explode('(', $col);
if (in_array($col, array('date', 'time'))) {
return $col;
}
if (strpos($col, 'timestamp') !== false) {
return 'datetime';
}
if ($col == 'inet') {
return('inet');
}
if ($col == 'boolean') {
return 'boolean';
}
if (strpos($col, 'int') !== false && $col != 'interval') {
return 'integer';
}
if (strpos($col, 'char') !== false) {
return 'string';
}
if (strpos($col, 'text') !== false) {
return 'text';
}
if (strpos($col, 'bytea') !== false) {
return 'binary';
}
if (in_array($col, array('float', 'float4', 'float8', 'double', 'double precision', 'decimal', 'real', 'numeric'))) {
return 'float';
}
return 'text';
}
/**
* Gets the length of a database-native column description, or null if no length
*
* @param string $real Real database-layer column type (i.e. "varchar(255)")
* @return int An integer representing the length of the column
*/
function length($real) {
$col = str_replace(array(')', 'unsigned'), '', $real);
$limit = null;
if (strpos($col, '(') !== false) {
list($col, $limit) = explode('(', $col);
}
if ($limit != null) {
return intval($limit);
}
return null;
}
/**
* Enter description here...
*
* @param unknown_type $results
*/
function resultSet(&$results) {
$this->results =& $results;
$this->map = array();
$num_fields = pg_num_fields($results);
$index = 0;
$j = 0;
while ($j < $num_fields) {
$columnName = pg_field_name($results, $j);
if (strpos($columnName, '__')) {
$parts = explode('__', $columnName);
$this->map[$index++] = array($parts[0], $parts[1]);
} else {
$this->map[$index++] = array(0, $columnName);
}
$j++;
}
}
/**
* Fetches the next row from the current result set
*
* @return unknown
*/
function fetchResult() {
if ($row = pg_fetch_row($this->results)) {
$resultRow = array();
$i = 0;
foreach ($row as $index => $field) {
list($table, $column) = $this->map[$index];
$resultRow[$table][$column] = $row[$index];
$i++;
}
return $resultRow;
} else {
return false;
}
}
/**
* Translates between PHP boolean values and PostgreSQL boolean values
*
* @param mixed $data Value to be translated
* @param boolean $quote True to quote value, false otherwise
* @return mixed Converted boolean value
*/
function boolean($data, $quote = true) {
$result = null;
if ($data === true || $data === false) {
$result = $data;
} elseif (is_string($data) && !is_numeric($data)) {
if (strpos(strtolower($data), 't') !== false) {
$result = true;
} else {
$result = false;
}
} else {
$result = (bool)$data;
}
return $result;
}
/**
* 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);
}
/**
* Inserts multiple values into a join table
*
* @param string $table
* @param string $fields
* @param array $values
*/
function insertMulti($table, $fields, $values) {
parent::__insertMulti($table, $fields, $values);
}
}
?>