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_oracle.php
<?php
/* SVN FILE: $Id: dbo_oracle.php 6311 2008-01-02 06:33:52Z phpnut $ */
/**
* Oracle 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 v 1.2.0.4041
* @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
*/
/**
* Short description for class.
*
* Long description for class
*
* @package cake
* @subpackage cake.cake.libs.model.datasources.dbo
*/
class DboOracle extends DboSource {
/**
* Enter description here...
*
* @var unknown_type
* @access public
*/
var $config;
/**
* Enter description here...
*
* @var unknown_type
* @access public
*/
var $alias = '';
/**
* The name of the model's sequence
*
* @var unknown_type
*/
var $sequence = '';
/**
* Transaction in progress flag
*
* @var boolean
*/
var $__transactionStarted = false;
/**
* Enter description here...
*
* @var unknown_type
* @access public
*/
var $columns = array(
'primary_key' => array('name' => 'number NOT NULL'),
'string' => array('name' => 'varchar2', 'limit' => '255'),
'text' => array('name' => 'varchar2'),
'integer' => array('name' => 'numeric'),
'float' => array('name' => 'float'),
'datetime' => array('name' => 'date', 'format' => 'Y-m-d H:i:s'),
'timestamp' => array('name' => 'date', 'format' => 'Y-m-d H:i:s'),
'time' => array('name' => 'date', 'format' => 'Y-m-d H:i:s'),
'date' => array('name' => 'date', 'format' => 'Y-m-d H:i:s'),
'binary' => array('name' => 'bytea'),
'boolean' => array('name' => 'boolean'),
'number' => array('name' => 'numeric'),
'inet' => array('name' => 'inet'));
/**
* Enter description here...
*
* @var unknown_type
* @access protected
*/
var $connection;
/**
* Enter description here...
*
* @var unknown_type
* @access protected
*/
var $_limit = -1;
/**
* Enter description here...
*
* @var unknown_type
* @access protected
*/
var $_offset = 0;
/**
* Enter description here...
*
* @var unknown_type
* @access protected
*/
var $_map;
/**
* Enter description here...
*
* @var unknown_type
* @access protected
*/
var $_currentRow;
/**
* Enter description here...
*
* @var unknown_type
* @access protected
*/
var $_numRows;
/**
* Enter description here...
*
* @var unknown_type
* @access protected
*/
var $_results;
/**
* Connects to the database using options in the given configuration array.
*
* @return boolean True if the database could be connected, else false
* @access public
*/
function connect() {
$config = $this->config;
$connect = $config['connect'];
$this->connected = false;
$config['charset'] = !empty($config['charset']) ? $config['charset'] : null;
$this->connection = $connect($config['login'], $config['password'], $config['database'], $config['charset']);
if ($this->connection) {
$this->connected = true;
if (!empty($config['nls_sort'])) {
$this->execute('ALTER SESSION SET NLS_SORT='.$config['nls_sort']);
}
if (!empty($config['nls_comp'])) {
$this->execute('ALTER SESSION SET NLS_COMP='.$config['nls_comp']);
}
$this->execute("ALTER SESSION SET NLS_DATE_FORMAT='YYYY-MM-DD HH24:MI:SS'");
} else {
$this->connected = false;
}
return $this->connected;
}
/**
* Sets the encoding language of the session
*
* @param string $lang language constant
* @return bool
*/
function setEncoding($lang) {
if (!$this->execute('ALTER SESSION SET NLS_LANGUAGE='.$lang)) {
return false;
}
return true;
}
/**
* Gets the current encoding language
*
* @return string language constant
*/
function getEncoding() {
$sql = 'SELECT VALUE FROM NLS_SESSION_PARAMETERS WHERE PARAMETER=\'NLS_LANGUAGE\'';
if (!$this->execute($sql)) {
return false;
}
if (!$row = $this->fetchRow()) {
return false;
}
return $row[0]['VALUE'];
}
/**
* Disconnects from database.
*
* @return boolean True if the database could be disconnected, else false
* @access public
*/
function disconnect() {
if ($this->connection) {
$this->connected = !ocilogoff($this->connection);
return !$this->connected;
}
}
/**
* Scrape the incoming SQL to create the association map. This is an extremely
* experimental method that creates the association maps since Oracle will not tell us.
*
* @param string $sql
* @return false if sql is nor a SELECT
* @access protected
*/
function _scrapeSQL($sql) {
$sql = str_replace("\"", '', $sql);
$preFrom = preg_split('/\bFROM\b/', $sql);
$preFrom = $preFrom[0];
$find = array('SELECT');
$replace = array('');
$fieldList = trim(str_replace($find, $replace, $preFrom));
$fields = preg_split('/,\s+/', $fieldList);//explode(', ', $fieldList);
$lastTableName = '';
foreach($fields as $key => $value) {
if ($value != 'COUNT(*) AS count') {
if (preg_match('/\s+(\w+(\.\w+)*)$/', $value, $matches)) {
$fields[$key] = $matches[1];
if (preg_match('/^(\w+\.)/', $value, $matches)) {
$fields[$key] = $matches[1] . $fields[$key];
$lastTableName = $matches[1];
}
}
/*
if (preg_match('/(([[:alnum:]_]+)\.[[:alnum:]_]+)(\s+AS\s+(\w+))?$/i', $value, $matches)) {
$fields[$key] = isset($matches[4]) ? $matches[2] . '.' . $matches[4] : $matches[1];
}
*/
}
}
$this->_map = array();
foreach($fields as $f) {
$e = explode('.', $f);
if (count($e) > 1) {
$table = $e[0];
$field = strtolower($e[1]);
} else {
$table = 0;
$field = $e[0];
}
$this->_map[] = array($table, $field);
}
}
/**
* Modify a SQL query to limit (and offset) the result set
*
* @param integer $limit Maximum number of rows to return
* @param integer $offset Row to begin returning
* @return modified SQL Query
* @access public
*/
function limit($limit = -1, $offset = 0) {
$this->_limit = (int) $limit;
$this->_offset = (int) $offset;
}
/**
* Returns number of rows in previous resultset. If no previous resultset exists,
* this returns false.
*
* @return integer Number of rows in resultset
* @access public
*/
function lastNumRows() {
return $this->_numRows;
}
/**
* Executes given SQL statement. This is an overloaded method.
*
* @param string $sql SQL statement
* @return resource Result resource identifier or null
* @access protected
*/
function _execute($sql) {
$this->_statementId = ociparse($this->connection, $sql);
if (!$this->_statementId) {
return null;
}
if ($this->__transactionStarted) {
$mode = OCI_DEFAULT;
} else {
$mode = OCI_COMMIT_ON_SUCCESS;
}
if (!ociexecute($this->_statementId, $mode)) {
return false;
}
switch(ocistatementtype($this->_statementId)) {
case 'DESCRIBE':
case 'SELECT':
$this->_scrapeSQL($sql);
break;
default:
return $this->_statementId;
break;
}
if ($this->_limit >= 1) {
ocisetprefetch($this->_statementId, $this->_limit);
} else {
ocisetprefetch($this->_statementId, 3000);
}
$this->_numRows = ocifetchstatement($this->_statementId, $this->_results, $this->_offset, $this->_limit, OCI_NUM | OCI_FETCHSTATEMENT_BY_ROW);
$this->_currentRow = 0;
$this->limit();
return $this->_statementId;
}
/**
* Enter description here...
*
* @return unknown
* @access public
*/
function fetchRow() {
if ($this->_currentRow >= $this->_numRows) {
ocifreestatement($this->_statementId);
$this->_map = null;
$this->_results = null;
$this->_currentRow = null;
$this->_numRows = null;
return false;
}
$resultRow = array();
foreach($this->_results[$this->_currentRow] as $index => $field) {
list($table, $column) = $this->_map[$index];
if (strpos($column, ' count')) {
$resultRow[0]['count'] = $field;
} else {
$resultRow[$table][$column] = $this->_results[$this->_currentRow][$index];
}
}
$this->_currentRow++;
return $resultRow;
}
/**
* Checks to see if a named sequence exists
*
* @param string $sequence
* @return bool
* @access public
*/
function sequenceExists($sequence) {
$sql = "SELECT SEQUENCE_NAME FROM USER_SEQUENCES WHERE SEQUENCE_NAME = '$sequence'";
if (!$this->execute($sql)) {
return false;
}
return $this->fetchRow();
}
/**
* Creates a database sequence
*
* @param string $sequence
* @return bool
* @access public
*/
function createSequence($sequence) {
$sql = "CREATE SEQUENCE $sequence";
return $this->execute($sql);
}
/**
* Enter description here...
*
* @param unknown_type $table
* @return unknown
* @access public
*/
function createTrigger($table) {
$sql = "CREATE OR REPLACE TRIGGER pk_$table" . "_trigger BEFORE INSERT ON $table FOR EACH ROW BEGIN SELECT pk_$table.NEXTVAL INTO :NEW.ID FROM DUAL; END;";
return $this->execute($sql);
}
/**
* Returns an array of tables in the database. If there are no tables, an error is
* raised and the application exits.
*
* @return array tablenames in the database
* @access public
*/
function listSources() {
$cache = parent::listSources();
if ($cache != null) {
return $cache;
}
$sql = 'SELECT view_name AS name FROM user_views UNION SELECT table_name AS name FROM user_tables';
if (!$this->execute($sql)) {
return false;
}
$sources = array();
while($r = $this->fetchRow()) {
$sources[] = $r[0]['name'];
}
parent::listSources($sources);
return $sources;
}
/**
* Returns an array of the fields in given table name.
*
* @param object instance of a model to inspect
* @return array Fields in table. Keys are name and type
* @access public
*/
function describe(&$model) {
$cache = parent::describe($model);
if ($cache != null) {
return $cache;
}
$sql = 'SELECT COLUMN_NAME, DATA_TYPE, DATA_LENGTH FROM user_tab_columns WHERE table_name = \'';
$sql .= strtoupper($this->fullTableName($model)) . '\'';
if (!$this->execute($sql)) {
return false;
}
$fields = array();
for($i=0; $row = $this->fetchRow(); $i++) {
$fields[strtolower($row[0]['COLUMN_NAME'])] = array('type'=> $this->column($row[0]['DATA_TYPE']),
'length'=> $row[0]['DATA_LENGTH']);
}
$this->__cacheDescription($this->fullTableName($model, false), $fields);
return $fields;
}
/**
* This method should quote Oracle identifiers. Well it doesn't.
* It would break all scaffolding and all of Cake's default assumptions.
*
* @param unknown_type $var
* @return unknown
* @access public
*/
function name($var) {
switch($var) {
case '_create':
case '_read':
case '_update':
case '_delete':
return "\"$var\"";
break;
default:
return $var;
break;
}
}
/**
* 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() {
$this->__transactionStarted = true;
return true;
}
/**
* Rollback a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions,
* or a transaction has not started).
*/
function rollback() {
return ocirollback($this->connection);
}
/**
* 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() {
$this->__transactionStarted = false;
return ocicommit($this->connection);
}
/**
* Converts database-layer column types to basic types
*
* @param string $real Real database-layer column type (i.e. "varchar(255)")
* @return string Abstract column type (i.e. "string")
* @access public
*/
function column($real) {
if (is_array($real)) {
$col = $real['name'];
if (isset($real['limit'])) {
$col .= '('.$real['limit'].')';
}
return $col;
} else {
$real = strtolower($real);
}
$col = str_replace(')', '', $real);
$limit = null;
@list($col, $limit) = explode('(', $col);
if (in_array($col, array('date', 'timestamp'))) {
return $col;
}
if (strpos($col, 'number') !== false) {
return 'integer';
}
if (strpos($col, 'integer') !== false) {
return 'integer';
}
if (strpos($col, 'char') !== false) {
return 'string';
}
if (strpos($col, 'text') !== false) {
return 'text';
}
if (strpos($col, 'blob') !== false) {
return 'binary';
}
if (in_array($col, array('float', 'double', 'decimal'))) {
return 'float';
}
if ($col == 'boolean') {
return $col;
}
return 'text';
}
/**
* Returns a quoted and escaped string of $data for use in an SQL statement.
*
* @param string $data String to be prepared for use in an SQL statement
* @return string Quoted and escaped
* @access public
*/
function value($data, $column = null, $safe = false) {
$parent = parent::value($data, $column, $safe);
if ($parent != null) {
return $parent;
}
if ($data === null) {
return 'NULL';
}
if ($data === '') {
return "''";
}
switch($column) {
case 'date':
$data = date('Y-m-d H:i:s', strtotime($data));
$data = "TO_DATE('$data', 'YYYY-MM-DD HH24:MI:SS')";
break;
case 'integer' :
case 'float' :
case null :
if (is_numeric($data)) {
break;
}
default:
$data = str_replace("'", "''", $data);
$data = "'$data'";
break;
}
return $data;
}
/**
* Returns the ID generated from the previous INSERT operation.
*
* @param string
* @return integer
* @access public
*/
function lastInsertId($source) {
$sequence = (!empty($this->sequence)) ? $this->sequence : $source . '_seq';
$sql = "SELECT $sequence.currval FROM dual";
if (!$this->execute($sql)) {
return false;
}
while($row = $this->fetchRow()) {
return $row[$sequence]['currval'];
}
return false;
}
/**
* Returns a formatted error message from previous database operation.
*
* @return string Error message with error number
* @access public
*/
function lastError() {
$errors = ocierror();
if (($errors != null) && (isset($errors["message"]))) {
return($errors["message"]);
}
return null;
}
/**
* Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
*
* @return int Number of affected rows
* @access public
*/
function lastAffected() {
return $this->_statementId ? ocirowcount($this->_statementId): false;
}
/**
* 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);
}
}
?>