<?php
#namespace Doctrine::DBAL::Platforms;
class Doctrine_DBAL_Platforms_MsSqlPlatform extends Doctrine_DBAL_Platforms_AbstractPlatform
{
/**
* the constructor
*/
public function __construct()
{
parent::__construct();
}
/**
* Adds an adapter-specific LIMIT clause to the SELECT statement.
* [ borrowed from Zend Framework ]
*
* @param string $query
* @param mixed $limit
* @param mixed $offset
* @link http://lists.bestpractical.com/pipermail/rt-devel/2005-June/007339.html
* @return string
* @override
*/
public function writeLimitClause($query, $limit, $offset)
{
if ($limit > 0) {
$count = intval($limit);
$offset = intval($offset);
if ($offset < 0) {
throw new Doctrine_Connection_Exception("LIMIT argument offset=$offset is not valid");
}
$orderby = stristr($query, 'ORDER BY');
if ($orderby !== false) {
$sort = (stripos($orderby, 'desc') !== false) ? 'desc' : 'asc';
$order = str_ireplace('ORDER BY', '', $orderby);
$order = trim(preg_replace('/ASC|DESC/i', '', $order));
}
$query = preg_replace('/^SELECT\s/i', 'SELECT TOP ' . ($count+$offset) . ' ', $query);
$query = 'SELECT * FROM (SELECT TOP ' . $count . ' * FROM (' . $query . ') AS inner_tbl';
if ($orderby !== false) {
$query .= ' ORDER BY ' . $order . ' ';
$query .= (stripos($sort, 'asc') !== false) ? 'DESC' : 'ASC';
}
$query .= ') AS outer_tbl';
if ($orderby !== false) {
$query .= ' ORDER BY ' . $order . ' ' . $sort;
}
return $query;
}
return $query;
}
/**
* Return string to call a variable with the current timestamp inside an SQL statement
* There are three special variables for current date and time:
* - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
* - CURRENT_DATE (date, DATE type)
* - CURRENT_TIME (time, TIME type)
*
* @return string to call a variable with the current timestamp
* @override
*/
public function getNowExpression($type = 'timestamp')
{
switch ($type) {
case 'time':
case 'date':
case 'timestamp':
default:
return 'GETDATE()';
}
}
/**
* return string to call a function to get a substring inside an SQL statement
*
* @return string to call a function to get a substring
* @override
*/
public function getSubstringExpression($value, $position, $length = null)
{
if ( ! is_null($length)) {
return 'SUBSTRING(' . $value . ', ' . $position . ', ' . $length . ')';
}
return 'SUBSTRING(' . $value . ', ' . $position . ', LEN(' . $value . ') - ' . $position . ' + 1)';
}
/**
* Returns string to concatenate two or more string parameters
*
* @param string $arg1
* @param string $arg2
* @param string $values...
* @return string to concatenate two strings
* @override
*/
public function getConcatExpression()
{
$args = func_get_args();
return '(' . implode(' + ', $args) . ')';
}
/**
* Returns global unique identifier
*
* @return string to get global unique identifier
* @override
*/
public function getGuidExpression()
{
return 'NEWID()';
}
/**
* Obtain DBMS specific SQL code portion needed to declare an text type
* field to be used in statements like CREATE TABLE.
*
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* length
* Integer value that determines the maximum length of the text
* field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
*
* default
* Text value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
*
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @override
*/
public function getNativeDeclaration($field)
{
if ( ! isset($field['type'])) {
throw new Doctrine_DataDict_Exception('Missing column type.');
}
switch ($field['type']) {
case 'array':
case 'object':
case 'text':
case 'char':
case 'varchar':
case 'string':
case 'gzip':
$length = !empty($field['length'])
? $field['length'] : false;
$fixed = ((isset($field['fixed']) && $field['fixed']) || $field['type'] == 'char') ? true : false;
return $fixed ? ($length ? 'CHAR('.$length.')' : 'CHAR('.$this->conn->options['default_text_field_length'].')')
: ($length ? 'VARCHAR('.$length.')' : 'TEXT');
case 'clob':
if ( ! empty($field['length'])) {
$length = $field['length'];
if ($length <= 8000) {
return 'VARCHAR('.$length.')';
}
}
return 'TEXT';
case 'blob':
if ( ! empty($field['length'])) {
$length = $field['length'];
if ($length <= 8000) {
return "VARBINARY($length)";
}
}
return 'IMAGE';
case 'integer':
case 'enum':
case 'int':
return 'INT';
case 'boolean':
return 'BIT';
case 'date':
return 'CHAR(' . strlen('YYYY-MM-DD') . ')';
case 'time':
return 'CHAR(' . strlen('HH:MM:SS') . ')';
case 'timestamp':
return 'CHAR(' . strlen('YYYY-MM-DD HH:MM:SS') . ')';
case 'float':
return 'FLOAT';
case 'decimal':
$length = !empty($field['length']) ? $field['length'] : 18;
$scale = !empty($field['scale']) ? $field['scale'] : $this->conn->getAttribute(Doctrine::ATTR_DECIMAL_PLACES);
return 'DECIMAL('.$length.','.$scale.')';
}
throw new Doctrine_DataDict_Exception('Unknown field type \'' . $field['type'] . '\'.');
}
/**
* Maps a native array description of a field to a MDB2 datatype and length
*
* @param array $field native field description
* @return array containing the various possible types, length, sign, fixed
* @override
*/
public function getPortableDeclaration($field)
{
$db_type = preg_replace('/[\d\(\)]/','', strtolower($field['type']) );
$length = (isset($field['length']) && $field['length'] > 0) ? $field['length'] : null;
$type = array();
// todo: unsigned handling seems to be missing
$unsigned = $fixed = null;
if ( ! isset($field['name']))
$field['name'] = '';
switch ($db_type) {
case 'bit':
$type[0] = 'boolean';
break;
case 'tinyint':
case 'smallint':
case 'int':
$type[0] = 'integer';
if ($length == 1) {
$type[] = 'boolean';
}
break;
case 'datetime':
$type[0] = 'timestamp';
break;
case 'float':
case 'real':
case 'numeric':
$type[0] = 'float';
break;
case 'decimal':
case 'money':
$type[0] = 'decimal';
break;
case 'text':
case 'varchar':
case 'ntext':
case 'nvarchar':
$fixed = false;
case 'char':
case 'nchar':
$type[0] = 'string';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^[is|has]/', $field['name'])) {
$type = array_reverse($type);
}
} elseif (strstr($db_type, 'text')) {
$type[] = 'clob';
}
if ($fixed !== false) {
$fixed = true;
}
break;
case 'image':
case 'varbinary':
$type[] = 'blob';
$length = null;
break;
default:
throw new Doctrine_DataDict_Exception('unknown database attribute type: '.$db_type);
}
return array('type' => $type,
'length' => $length,
'unsigned' => $unsigned,
'fixed' => $fixed);
}
/**
* Quote a string so it can be safely used as a table / column name
*
* Quoting style depends on which database driver is being used.
*
* @param string $identifier identifier name to be quoted
* @param bool $checkOption check the 'quote_identifier' option
*
* @return string quoted identifier string
* @override
*/
public function quoteIdentifier($identifier, $checkOption = false)
{
if ($checkOption && ! $this->getAttribute(Doctrine::ATTR_QUOTE_IDENTIFIER)) {
return $identifier;
}
if (strpos($identifier, '.') !== false) {
$parts = explode('.', $identifier);
$quotedParts = array();
foreach ($parts as $p) {
$quotedParts[] = $this->quoteIdentifier($p);
}
return implode('.', $quotedParts);
}
return '[' . str_replace(']', ']]', $identifier) . ']';
}
}
?>