Subversion-Projekte lars-tiefland.cakephp

<?php

/* SVN FILE: $Id: dbo_oracle.php 8004 2009-01-16 20:15:21Z gwoo $ */

/**

 * 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. (http://www.cakefoundation.org)

 *

 * Licensed under The MIT License

 * Redistributions of files must retain the above copyright notice.

 *

 * @filesource

 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)

 * @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: 8004 $

 * @modifiedby    $LastChangedBy: gwoo $

 * @lastmodified  $Date: 2009-01-16 12:15:21 -0800 (Fri, 16 Jan 2009) $

 * @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 = array();

/**

 * Enter description here...

 *

 * @var unknown_type

 */

	var $alias = '';

/**

 * Sequence names as introspected from the database

 */

	var $_sequences = array();

/**

 * Transaction in progress flag

 *

 * @var boolean

 */

	var $__transactionStarted = false;

/**

 * Enter description here...

 *

 * @var unknown_type

 * @access public

 */

	var $columns = array(

		'primary_key' => array('name' => ''),

		'string' => array('name' => 'varchar2', 'limit' => '255'),

		'text' => array('name' => 'varchar2'),

		'integer' => array('name' => 'number'),

		'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' => 'number'),

		'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;

/**

 * Last error issued by oci extension

 *

 * @var unknown_type

 */

	var $_error;

/**

 * Base configuration settings for MySQL driver

 *

 * @var array

 */

	var $_baseConfig = array(

		'persistent' => true,

		'host' => 'localhost',

		'login' => 'system',

		'password' => '',

		'database' => 'cake',

		'nls_sort' => '',

		'nls_sort' => ''

	);

/**

 * Table-sequence map

 *

 * @var unknown_type

 */

	var $_sequenceMap = array();

/**

 * 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;

		$this->connected = false;

		$config['charset'] = !empty($config['charset']) ? $config['charset'] : null;

		if ($this->config['persistent']) {

			$connect = 'ociplogon';

		} else {

			$connect = 'ocilogon';

		}

		$this->connection = @$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;

			$this->_setError();

			return false;

		}

		return $this->connected;

	}

	/**

	 * Keeps track of the most recent Oracle error

	 *

	 */

	function _setError($source = null, $clear = false) {

		if ($source) {

			$e = ocierror($source);

		} else {

			$e = ocierror();

		}

		$this->_error = $e['message'];

		if ($clear) {

			$this->_error = null;

		}

	}

/**

 * 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) {

			$this->_setError($this->connection);

			return false;

		}

		if ($this->__transactionStarted) {

			$mode = OCI_DEFAULT;

		} else {

			$mode = OCI_COMMIT_ON_SUCCESS;

		}

		if (!@ociexecute($this->_statementId, $mode)) {

			$this->_setError($this->_statementId);

			return false;

		}

		$this->_setError(null, true);

		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;

	}

/**

 * Fetches the next row from the current result set

 *

 * @return unknown

 */

	function fetchResult() {

		return $this->fetchRow();

	}

/**

 * 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 all_views UNION SELECT table_name AS name FROM all_tables';

		if (!$this->execute($sql)) {

			return false;

		}

		$sources = array();

		while($r = $this->fetchRow()) {

			$sources[] = strtolower($r[0]['name']);

		}

		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) {

		if (!empty($model->sequence)) {

			$this->_sequenceMap[$model->table] = $model->sequence;

		} elseif (!empty($model->table)) {

			$this->_sequenceMap[$model->table] = $model->table . '_seq';

		}

		$cache = parent::describe($model);

		if ($cache != null) {

			return $cache;

		}

		$sql = 'SELECT COLUMN_NAME, DATA_TYPE, DATA_LENGTH FROM all_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;

	}

/**

 * Deletes all the records in a table and drops all associated auto-increment sequences.

 * Using DELETE instead of TRUNCATE because it causes locking problems.

 *

 * @param mixed $table A string or model class representing the table to be truncated

 * @param integer $reset If -1, sequences are dropped, if 0 (default), sequences are reset,

 *						and if 1, sequences are not modified

 * @return boolean	SQL TRUNCATE TABLE statement, false if not applicable.

 * @access public

 *

 */

	function truncate($table, $reset = 0) {

		if (empty($this->_sequences)) {

			$sql = "SELECT sequence_name FROM all_sequences";

			$this->execute($sql);

			while ($row = $this->fetchRow()) {

				$this->_sequences[] = strtolower($row[0]['sequence_name']);

			}

		}

		$this->execute('DELETE FROM ' . $this->fullTableName($table));

		if (!isset($this->_sequenceMap[$table]) || !in_array($this->_sequenceMap[$table], $this->_sequences)) {

			return true;

		}

		if ($reset === 0) {

			$this->execute("SELECT {$this->_sequenceMap[$table]}.nextval FROM dual");

			$row = $this->fetchRow();

			$currval = $row[$this->_sequenceMap[$table]]['nextval'];

			$this->execute("SELECT min_value FROM all_sequences WHERE sequence_name = '{$this->_sequenceMap[$table]}'");

			$row = $this->fetchRow();

			$min_value = $row[0]['min_value'];

			if ($min_value == 1) $min_value = 0;

			$offset = -($currval - $min_value);

			$this->execute("ALTER SEQUENCE {$this->_sequenceMap[$table]} INCREMENT BY $offset MINVALUE $min_value");

			$this->execute("SELECT {$this->_sequenceMap[$table]}.nextval FROM dual");

			$this->execute("ALTER SEQUENCE {$this->_sequenceMap[$table]} INCREMENT BY 1");

		} else {

			//$this->execute("DROP SEQUENCE {$this->_sequenceMap[$table]}");

		}

		return true;

	}

/**

 * Enables, disables, and lists table constraints

 *

 * Note: This method could have been written using a subselect for each table,

 * however the effort Oracle expends to run the constraint introspection is very high.

 * Therefore, this method caches the result once and loops through the arrays to find

 * what it needs. It reduced my query time by 50%. YMMV.

 *

 * @param string $action

 * @param string $table

 * @return mixed boolean true or array of constraints

 */

	function constraint($action, $table) {

		if (empty($table)) {

			trigger_error(__('Must specify table to operate on constraints'));

		}

		$table = strtoupper($table);

		if (empty($this->_keyConstraints)) {

			$sql = "SELECT

					  table_name,

					  c.constraint_name

					FROM all_cons_columns cc

					LEFT JOIN all_indexes i ON (cc.constraint_name = i.index_name)

					LEFT JOIN all_constraints c ON(c.constraint_name = cc.constraint_name)";

			$this->execute($sql);

			while ($row = $this->fetchRow()) {

				$this->_keyConstraints[] = array($row[0]['table_name'], $row['c']['constraint_name']);

			}

		}

		$relatedKeys = array();

		foreach ($this->_keyConstraints as $c) {

			if ($c[0] == $table) {

				$relatedKeys[] = $c[1];

			}

		}

		if (empty($this->_constraints)) {

			$sql = "SELECT

					  table_name,

					  constraint_name,

					  r_constraint_name

					FROM

					  all_constraints";

			$this->execute($sql);

			while ($row = $this->fetchRow()) {

				$this->_constraints[] = $row[0];

			}

		}

		$constraints = array();

		foreach ($this->_constraints as $c) {

			if (in_array($c['r_constraint_name'], $relatedKeys)) {

				$constraints[] = array($c['table_name'], $c['constraint_name']);

			}

		}

		foreach ($constraints as $c) {

			list($table, $constraint) = $c;

			switch ($action) {

				case 'enable':

					$this->execute("ALTER TABLE $table ENABLE CONSTRAINT $constraint");

					break;

				case 'disable':

					$this->execute("ALTER TABLE $table DISABLE CONSTRAINT $constraint");

					break;

				case 'list':

					return $constraints;

					break;

				default:

					trigger_error(__('DboOracle::constraint() accepts only enable, disable, or list'));

			}

		}

		return true;

	}

/**

 * Returns an array of the indexes in given table name.

 *

 * @param string $model Name of model to inspect

 * @return array Fields in table. Keys are column and unique

 */

	function index($model) {

		$index = array();

		$table = $this->fullTableName($model, false);

		if ($table) {

			$indexes = $this->query('SELECT

			  cc.table_name,

			  cc.column_name,

			  cc.constraint_name,

			  c.constraint_type,

			  i.index_name,

			  i.uniqueness

			FROM all_cons_columns cc

			LEFT JOIN all_indexes i ON(cc.constraint_name = i.index_name)

			LEFT JOIN all_constraints c ON(c.constraint_name = cc.constraint_name)

			WHERE cc.table_name = \'' . strtoupper($table) .'\'');

			foreach ($indexes as $i => $idx) {

				if ($idx['c']['constraint_type'] == 'P') {

					$key = 'PRIMARY';

				} else {

					continue;

				}

				if (!isset($index[$key])) {

					$index[$key]['column'] = strtolower($idx['cc']['column_name']);

					$index[$key]['unique'] = intval($idx['i']['uniqueness'] == 'UNIQUE');

				} else {

					if (!is_array($index[$key]['column'])) {

						$col[] = $index[$key]['column'];

					}

					$col[] = strtolower($idx['cc']['column_name']);

					$index[$key]['column'] = $col;

				}

			}

		}

		return $index;

	}

/**

 * Generate a Oracle Alter Table syntax for the given Schema comparison

 *

 * @param unknown_type $schema

 * @return unknown

 */

	function alterSchema($compare, $table = null) {

		if (!is_array($compare)) {

			return false;

		}

		$out = '';

		$colList = array();

		foreach($compare as $curTable => $types) {

			if (!$table || $table == $curTable) {

				$out .= 'ALTER TABLE ' . $this->fullTableName($curTable) . " \n";

				foreach($types as $type => $column) {

					switch($type) {

						case 'add':

							foreach($column as $field => $col) {

								$col['name'] = $field;

								$alter = 'ADD '.$this->buildColumn($col);

								if (isset($col['after'])) {

									$alter .= ' AFTER '. $this->name($col['after']);

								}

								$colList[] = $alter;

							}

						break;

						case 'drop':

							foreach($column as $field => $col) {

								$col['name'] = $field;

								$colList[] = 'DROP '.$this->name($field);

							}

						break;

						case 'change':

							foreach($column as $field => $col) {

								if (!isset($col['name'])) {

									$col['name'] = $field;

								}

								$colList[] = 'CHANGE '. $this->name($field).' '.$this->buildColumn($col);

							}

						break;

					}

				}

				$out .= "\t" . join(",\n\t", $colList) . ";\n\n";

			}

		}

		return $out;

	}

/**

 * 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($name) {

		if (strpos($name, '.') !== false && strpos($name, '"') === false) {

			list($model, $field) = explode('.', $name);

			if ($field[0] == "_") {

				$name = "$model.\"$field\"";

			}

		} else {

			if ($name[0] == "_") {

				$name = "\"$name\"";

			}

		}

		return $name;

	}

/**

 * 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;

		if (strpos($col, '(') !== false) {

			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':

				$date = new DateTime($data);

				$data = $date->format('Y-m-d H:i:s');

				$data = "TO_DATE('$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 = $this->_sequenceMap[$source];

		$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() {

		return $this->_error;

	}

/**

 * 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;

	}

/**

 * Renders a final SQL statement by putting together the component parts in the correct order

 *

 * @param string $type

 * @param array $data

 * @return string

 */

	function renderStatement($type, $data) {

		extract($data);

		$aliases = null;

		switch (strtolower($type)) {

			case 'select':

				return "SELECT {$fields} FROM {$table} {$alias} {$joins} {$conditions} {$order} {$limit}";

			break;

			case 'create':

				return "INSERT INTO {$table} ({$fields}) VALUES ({$values})";

			break;

			case 'update':

				if (!empty($alias)) {

					$aliases = "{$this->alias}{$alias} ";

				}

				return "UPDATE {$table} {$aliases}SET {$fields} {$conditions}";

			break;

			case 'delete':

				if (!empty($alias)) {

					$aliases = "{$this->alias}{$alias} ";

				}

				return "DELETE FROM {$table} {$aliases}{$conditions}";

			break;

			case 'schema':

				foreach (array('columns', 'indexes') as $var) {

					if (is_array(${$var})) {

						${$var} = "\t" . join(",\n\t", array_filter(${$var}));

					}

				}

				if (trim($indexes) != '') {

					$columns .= ',';

				}

				return "CREATE TABLE {$table} (\n{$columns}{$indexes})";

			break;

			case 'alter':

				break;

		}

	}

/**

 * Enter description here...

 *

 * @param Model $model

 * @param unknown_type $linkModel

 * @param string $type Association type

 * @param unknown_type $association

 * @param unknown_type $assocData

 * @param unknown_type $queryData

 * @param unknown_type $external

 * @param unknown_type $resultSet

 * @param integer $recursive Number of levels of association

 * @param array $stack

 */

	function queryAssociation(&$model, &$linkModel, $type, $association, $assocData, &$queryData, $external = false, &$resultSet, $recursive, $stack) {

		if ($query = $this->generateAssociationQuery($model, $linkModel, $type, $association, $assocData, $queryData, $external, $resultSet)) {

			if (!isset($resultSet) || !is_array($resultSet)) {

				if (Configure::read() > 0) {

					e('<div style = "font: Verdana bold 12px; color: #FF0000">' . sprintf(__('SQL Error in model %s:', true), $model->alias) . ' ');

					if (isset($this->error) && $this->error != null) {

						e($this->error);

					}

					e('</div>');

				}

				return null;

			}

			$count = count($resultSet);

			if ($type === 'hasMany' && (!isset($assocData['limit']) || empty($assocData['limit']))) {

				$ins = $fetch = array();

				for ($i = 0; $i < $count; $i++) {

					if ($in = $this->insertQueryData('{$__cakeID__$}', $resultSet[$i], $association, $assocData, $model, $linkModel, $stack)) {

						$ins[] = $in;

					}

				}

				if (!empty($ins)) {

					$fetch = array();

					$ins = array_chunk($ins, 1000);

					foreach ($ins as $i) {

						$q = str_replace('{$__cakeID__$}', join(', ', $i), $query);

						$q = str_replace('= (', 'IN (', $q);

						$res = $this->fetchAll($q, $model->cacheQueries, $model->alias);

						$fetch = array_merge($fetch, $res);

					}

				}

				if (!empty($fetch) && is_array($fetch)) {

					if ($recursive > 0) {

						foreach ($linkModel->__associations as $type1) {

							foreach ($linkModel->{$type1} as $assoc1 => $assocData1) {

								$deepModel =& $linkModel->{$assoc1};

								$tmpStack = $stack;

								$tmpStack[] = $assoc1;