521 lines
16 KiB
PHP
521 lines
16 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\DBAL\Platforms;
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use Doctrine\Common\DoctrineException;
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/**
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* The MsSqlPlatform provides the behavior, features and SQL dialect of the
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* MySQL database platform.
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*
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* @since 2.0
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* @author Roman Borschel <roman@code-factory.org>
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* @author Jonathan H. Wage <jonwage@gmail.com>
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*/
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class MsSqlPlatform extends AbstractPlatform
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{
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/**
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* the constructor
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*/
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public function __construct()
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{
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parent::__construct();
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}
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/**
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* Adds an adapter-specific LIMIT clause to the SELECT statement.
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* [ borrowed from Zend Framework ]
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*
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* @param string $query
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* @param mixed $limit
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* @param mixed $offset
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* @link http://lists.bestpractical.com/pipermail/rt-devel/2005-June/007339.html
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* @return string
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* @override
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*/
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public function writeLimitClause($query, $limit = false, $offset = false)
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{
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if ($limit > 0) {
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$count = intval($limit);
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$offset = intval($offset);
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if ($offset < 0) {
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throw \Doctrine\Common\DoctrineException::limitOffsetInvalid($offset);
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}
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$orderby = stristr($query, 'ORDER BY');
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if ($orderby !== false) {
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$sort = (stripos($orderby, 'desc') !== false) ? 'desc' : 'asc';
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$order = str_ireplace('ORDER BY', '', $orderby);
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$order = trim(preg_replace('/ASC|DESC/i', '', $order));
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}
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$query = preg_replace('/^SELECT\s/i', 'SELECT TOP ' . ($count+$offset) . ' ', $query);
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$query = 'SELECT * FROM (SELECT TOP ' . $count . ' * FROM (' . $query . ') AS inner_tbl';
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if ($orderby !== false) {
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$query .= ' ORDER BY ' . $order . ' ';
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$query .= (stripos($sort, 'asc') !== false) ? 'DESC' : 'ASC';
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}
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$query .= ') AS outer_tbl';
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if ($orderby !== false) {
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$query .= ' ORDER BY ' . $order . ' ' . $sort;
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}
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return $query;
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}
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return $query;
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}
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public function getAlterTableSql($name, array $changes, $check = false)
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{
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foreach ($changes as $changeName => $change) {
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switch ($changeName) {
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case 'add':
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case 'remove':
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case 'change':
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case 'rename':
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case 'name':
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break;
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default:
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throw \Doctrine\Common\DoctrineException::alterTableChangeNotSupported($changeName);
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}
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}
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$query = '';
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if ( ! empty($changes['name'])) {
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$change_name = $changes['name'];
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$query .= 'RENAME TO ' . $change_name;
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}
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if ( ! empty($changes['add']) && is_array($changes['add'])) {
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foreach ($changes['add'] as $fieldName => $field) {
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if ($query) {
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$query .= ', ';
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}
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$query .= 'ADD ' . $this->getColumnDeclarationSql($fieldName, $field);
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}
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}
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if ( ! empty($changes['remove']) && is_array($changes['remove'])) {
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foreach ($changes['remove'] as $fieldName => $field) {
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if ($query) {
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$query .= ', ';
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}
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$query .= 'DROP COLUMN ' . $fieldName;
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}
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}
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$rename = array();
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if ( ! empty($changes['rename']) && is_array($changes['rename'])) {
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foreach ($changes['rename'] as $fieldName => $field) {
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$rename[$field['name']] = $fieldName;
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}
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}
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if ( ! empty($changes['change']) && is_array($changes['change'])) {
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foreach ($changes['change'] as $fieldName => $field) {
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if ($query) {
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$query.= ', ';
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}
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if (isset($rename[$fieldName])) {
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$oldFieldName = $rename[$fieldName];
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unset($rename[$fieldName]);
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} else {
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$oldFieldName = $fieldName;
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}
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$query .= 'CHANGE ' . $oldFieldName . ' '
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. $this->getColumnDeclarationSql($fieldName, $field['definition']);
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}
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}
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if ( ! empty($rename) && is_array($rename)) {
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foreach ($rename as $renameName => $renamedField) {
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if ($query) {
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$query.= ', ';
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}
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$field = $changes['rename'][$renamedField];
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$query .= 'CHANGE ' . $renamedField . ' '
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. $this->getColumnDeclarationSql($field['name'], $field['definition']);
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}
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}
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if ( ! $query) {
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return false;
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}
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return 'ALTER TABLE ' . $name . ' ' . $query;
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}
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/**
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* Returns the regular expression operator.
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*
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* @return string
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* @override
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*/
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public function getRegexpExpression()
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{
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return 'RLIKE';
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}
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/**
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* return string to call a function to get random value inside an SQL statement
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*
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* @return string to generate float between 0 and 1
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*/
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public function getRandomExpression()
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{
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return 'RAND()';
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}
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/**
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* Return string to call a variable with the current timestamp inside an SQL statement
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* There are three special variables for current date and time:
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* - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
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* - CURRENT_DATE (date, DATE type)
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* - CURRENT_TIME (time, TIME type)
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*
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* @return string to call a variable with the current timestamp
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* @override
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*/
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public function getNowExpression($type = 'timestamp')
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{
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switch ($type) {
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case 'time':
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case 'date':
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case 'timestamp':
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default:
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return 'GETDATE()';
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}
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}
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/**
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* return string to call a function to get a substring inside an SQL statement
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*
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* @return string to call a function to get a substring
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* @override
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*/
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public function getSubstringExpression($value, $position, $length = null)
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{
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if ( ! is_null($length)) {
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return 'SUBSTRING(' . $value . ', ' . $position . ', ' . $length . ')';
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}
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return 'SUBSTRING(' . $value . ', ' . $position . ', LEN(' . $value . ') - ' . $position . ' + 1)';
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}
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/**
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* Returns string to concatenate two or more string parameters
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*
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* @param string $arg1
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* @param string $arg2
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* @param string $values...
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* @return string to concatenate two strings
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* @override
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*/
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public function getConcatExpression()
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{
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$args = func_get_args();
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return '(' . implode(' + ', $args) . ')';
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}
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/**
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* Returns global unique identifier
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*
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* @return string to get global unique identifier
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* @override
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*/
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public function getGuidExpression()
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{
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return 'NEWID()';
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}
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/**
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* Whether the platform prefers identity columns for ID generation.
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* MsSql prefers "autoincrement" identity columns since sequences can only
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* be emulated with a table.
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*
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* @return boolean
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* @override
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*/
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public function prefersIdentityColumns()
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{
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return true;
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}
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/**
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* Whether the platform supports identity columns.
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* MsSql supports this through AUTO_INCREMENT columns.
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*
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* @return boolean
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* @override
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*/
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public function supportsIdentityColumns()
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{
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return true;
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}
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/**
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* Whether the platform supports savepoints. MsSql does not.
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*
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* @return boolean
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* @override
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*/
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public function supportsSavepoints()
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{
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return false;
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}
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public function getShowDatabasesSql()
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{
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return 'SHOW DATABASES';
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}
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public function getListTablesSql()
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{
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return 'SHOW TABLES';
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}
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/**
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* create a new database
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*
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* @param string $name name of the database that should be created
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* @return string
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* @override
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*/
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public function getCreateDatabaseSql($name)
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{
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return 'CREATE DATABASE ' . $name;
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}
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/**
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* drop an existing database
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*
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* @param string $name name of the database that should be dropped
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* @return string
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* @override
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*/
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public function getDropDatabaseSql($name)
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{
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return 'DROP DATABASE ' . $name;
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}
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public function getSetTransactionIsolationSql($level)
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{
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return 'SET TRANSACTION ISOLATION LEVEL ' . $this->_getTransactionIsolationLevelSql($level);
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}
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/**
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* @override
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*/
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public function getIntegerTypeDeclarationSql(array $field)
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{
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return 'INT' . $this->_getCommonIntegerTypeDeclarationSql($field);
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}
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/**
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* @override
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*/
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public function getBigIntTypeDeclarationSql(array $field)
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{
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return 'BIGINT' . $this->_getCommonIntegerTypeDeclarationSql($field);
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}
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/**
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* @override
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*/
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public function getSmallIntTypeDeclarationSql(array $field)
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{
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return 'SMALLINT' . $this->_getCommonIntegerTypeDeclarationSql($field);
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}
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public function getVarcharTypeDeclarationSql(array $field)
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{
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if ( ! isset($field['length'])) {
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if (array_key_exists('default', $field)) {
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$field['length'] = $this->getVarcharMaxLength();
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} else {
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$field['length'] = false;
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}
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}
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$length = ($field['length'] <= $this->getVarcharMaxLength()) ? $field['length'] : false;
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$fixed = (isset($field['fixed'])) ? $field['fixed'] : false;
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return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(255)')
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: ($length ? 'VARCHAR(' . $length . ')' : 'TEXT');
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}
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/**
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* @override
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*/
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protected function _getCommonIntegerTypeDeclarationSql(array $columnDef)
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{
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$autoinc = '';
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if ( ! empty($columnDef['autoincrement'])) {
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$autoinc = ' AUTO_INCREMENT';
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}
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$unsigned = (isset($columnDef['unsigned']) && $columnDef['unsigned']) ? ' UNSIGNED' : '';
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return $unsigned . $autoinc;
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}
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/**
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* Obtain DBMS specific SQL code portion needed to set the CHARACTER SET
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* of a field declaration to be used in statements like CREATE TABLE.
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*
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* @param string $charset name of the charset
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* @return string DBMS specific SQL code portion needed to set the CHARACTER SET
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* of a field declaration.
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*/
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public function getCharsetFieldDeclaration($charset)
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{
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return 'CHARACTER SET ' . $charset;
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}
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/**
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* @override
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*/
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public function getDateTimeTypeDeclarationSql(array $fieldDeclaration)
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{
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return 'CHAR(' . strlen('YYYY-MM-DD HH:MM:SS') . ')';
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}
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/**
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* @override
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*/
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public function getBooleanTypeDeclarationSql(array $field)
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{
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return 'BIT';
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}
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/**
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* Get the platform name for this instance
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*
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* @return string
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*/
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public function getName()
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{
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return 'mssql';
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}
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/**
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* Adds an adapter-specific LIMIT clause to the SELECT statement.
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*
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* @param string $query
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* @param mixed $limit
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* @param mixed $offset
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* @link http://lists.bestpractical.com/pipermail/rt-devel/2005-June/007339.html
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* @return string
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*/
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public function modifyLimitQuery($query, $limit, $offset = null)
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{
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if ($limit > 0) {
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$count = intval($limit);
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$offset = intval($offset);
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if ($offset < 0) {
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throw new Doctrine_Connection_Exception("LIMIT argument offset=$offset is not valid");
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}
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$orderby = stristr($query, 'ORDER BY');
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if ($orderby !== false) {
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// Ticket #1835: Fix for ORDER BY alias
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// Ticket #2050: Fix for multiple ORDER BY clause
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$order = str_ireplace('ORDER BY', '', $orderby);
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$orders = explode(',', $order);
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for ($i = 0; $i < count($orders); $i++) {
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$sorts[$i] = (stripos($orders[$i], ' DESC') !== false) ? 'DESC' : 'ASC';
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$orders[$i] = trim(preg_replace('/\s+(ASC|DESC)$/i', '', $orders[$i]));
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// find alias in query string
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$helperString = stristr($query, $orders[$i]);
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$fromClausePos = strpos($helperString, ' FROM ');
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$fieldsString = substr($helperString, 0, $fromClausePos + 1);
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$fieldArray = explode(',', $fieldsString);
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$fieldArray = array_shift($fieldArray);
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$aux2 = preg_split('/ as /i', $fieldArray);
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$aliases[$i] = trim(end($aux2));
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}
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}
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// Ticket #1259: Fix for limit-subquery in MSSQL
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$selectRegExp = 'SELECT\s+';
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$selectReplace = 'SELECT ';
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if (preg_match('/^SELECT(\s+)DISTINCT/i', $query)) {
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$selectRegExp .= 'DISTINCT\s+';
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$selectReplace .= 'DISTINCT ';
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}
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$query = preg_replace('/^'.$selectRegExp.'/i', $selectReplace . 'TOP ' . ($count + $offset) . ' ', $query);
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$query = 'SELECT * FROM (SELECT TOP ' . $count . ' * FROM (' . $query . ') AS ' . 'inner_tbl';
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if ($orderby !== false) {
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$query .= ' ORDER BY ';
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for ($i = 0, $l = count($orders); $i < $l; $i++) {
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if ($i > 0) { // not first order clause
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$query .= ', ';
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}
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$query .= 'inner_tbl' . '.' . $aliases[$i] . ' ';
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$query .= (stripos($sorts[$i], 'ASC') !== false) ? 'DESC' : 'ASC';
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}
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}
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$query .= ') AS ' . 'outer_tbl';
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if ($orderby !== false) {
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$query .= ' ORDER BY ';
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for ($i = 0, $l = count($orders); $i < $l; $i++) {
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if ($i > 0) { // not first order clause
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$query .= ', ';
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}
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$query .= 'outer_tbl' . '.' . $aliases[$i] . ' ' . $sorts[$i];
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}
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}
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}
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return $query;
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}
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/**
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* Get the insert sql for an empty insert statement
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*
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* @param string $tableName
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* @param string $identifierColumnName
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* @return string $sql
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*/
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public function getEmptyIdentityInsertSql($quotedTableName, $quotedIdentifierColumnName)
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{
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return 'INSERT INTO ' . $quotedTableName . ' DEFAULT VALUES';
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}
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} |