<?php
#namespace Doctrine::DBAL::Platforms;
/**
* Enter description here...
*
* @since 2.0
*/
class Doctrine_DatabasePlatform_SqlitePlatform extends Doctrine_DatabasePlatform
{
/**
* the constructor
*/
public function __construct()
{
parent::__construct();
}
/**
* Returns the md5 sum of the data that SQLite's md5() function receives.
*
* @param mixed $data
* @return string
*/
public static function md5Impl($data)
{
return md5($data);
}
/**
* Returns the modules of the data that SQLite's mod() function receives.
*
* @param integer $dividend
* @param integer $divisor
* @return string
*/
public static function modImpl($dividend, $divisor)
{
return $dividend % $divisor;
}
/**
* locate
* returns the position of the first occurrence of substring $substr in string $str that
* SQLite's locate() function receives
*
* @param string $substr literal string to find
* @param string $str literal string
* @return string
*/
public static function locateImpl($substr, $str)
{
return strpos($str, $substr);
}
public static function sha1Impl($str)
{
return sha1($str);
}
public static function ltrimImpl($str)
{
return ltrim($str);
}
public static function rtrimImpl($str)
{
return rtrim($str);
}
public static function trimImpl($str)
{
return trim($str);
}
/**
* returns the regular expression operator
*
* @return string
* @override
*/
public function getRegexpExpression()
{
return 'RLIKE';
}
/**
* Returns a string to call a function to compute the
* soundex encoding of a string
*
* The string "?000" is returned if the argument is NULL.
*
* @param string $value
* @return string SQL soundex function with given parameter
*/
public function getSoundexExpression($value)
{
return 'SOUNDEX(' . $value . ')';
}
/**
* Return string to call a variable with the current timestamp inside an SQL statement
* There are three special variables for current date and time.
*
* @return string sqlite function as string
* @override
*/
public function getNowExpression($type = 'timestamp')
{
switch ($type) {
case 'time':
return 'time(\'now\')';
case 'date':
return 'date(\'now\')';
case 'timestamp':
default:
return 'datetime(\'now\')';
}
}
/**
* return string to call a function to get random value inside an SQL statement
*
* @return string to generate float between 0 and 1
* @override
*/
public function getRandomExpression()
{
return '((RANDOM() + 2147483648) / 4294967296)';
}
/**
* return string to call a function to get a substring inside an SQL statement
*
* Note: Not SQL92, but common functionality.
*
* SQLite only supports the 2 parameter variant of this function
*
* @param string $value an sql string literal or column name/alias
* @param integer $position where to start the substring portion
* @param integer $length the substring portion length
* @return string SQL substring function with given parameters
* @override
*/
public function getSubstringExpression($value, $position, $length = null)
{
if ($length !== null) {
return 'SUBSTR(' . $value . ', ' . $position . ', ' . $length . ')';
}
return 'SUBSTR(' . $value . ', ' . $position . ', LENGTH(' . $value . '))';
}
/**
* 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.
* @author Lukas Smith (PEAR MDB2 library)
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @override
*/
public function getNativeDeclaration(array $field)
{
if ( ! isset($field['type'])) {
throw new Doctrine_DataDict_Exception('Missing column type.');
}
switch ($field['type']) {
case 'text':
case 'object':
case 'array':
case 'string':
case 'char':
case 'gzip':
case 'varchar':
$length = (isset($field['length']) && $field['length']) ? $field['length'] : null;
$fixed = ((isset($field['fixed']) && $field['fixed']) || $field['type'] == 'char') ? true : false;
return $fixed ? ($length ? 'CHAR('.$length.')' : 'CHAR('.$this->conn->getAttribute(Doctrine::ATTR_DEFAULT_TEXTFLD_LENGTH).')')
: ($length ? 'VARCHAR('.$length.')' : 'TEXT');
case 'clob':
if ( ! empty($field['length'])) {
$length = $field['length'];
if ($length <= 255) {
return 'TINYTEXT';
} elseif ($length <= 65535) {
return 'TEXT';
} elseif ($length <= 16777215) {
return 'MEDIUMTEXT';
}
}
return 'LONGTEXT';
case 'blob':
if ( ! empty($field['length'])) {
$length = $field['length'];
if ($length <= 255) {
return 'TINYBLOB';
} elseif ($length <= 65535) {
return 'BLOB';
} elseif ($length <= 16777215) {
return 'MEDIUMBLOB';
}
}
return 'LONGBLOB';
case 'enum':
case 'integer':
case 'boolean':
case 'int':
return 'INTEGER';
case 'date':
return 'DATE';
case 'time':
return 'TIME';
case 'timestamp':
return 'DATETIME';
case 'float':
case 'double':
return 'DOUBLE';//($this->conn->options['fixed_float'] ? '('.
//($this->conn->options['fixed_float']+2).','.$this->conn->options['fixed_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 Doctrine datatype and length
*
* @param array $field native field description
* @return array containing the various possible types, length, sign, fixed
* @override
*/
public function getPortableDeclaration(array $field)
{
$dbType = strtolower($field['type']);
$length = (isset($field['length'])) ? $field['length'] : null;
$unsigned = (isset($field['unsigned'])) ? $field['unsigned'] : null;
$fixed = null;
$type = array();
if ( ! isset($field['name'])) {
$field['name'] = '';
}
switch ($dbType) {
case 'boolean':
$type[] = 'boolean';
break;
case 'tinyint':
$type[] = 'integer';
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
$unsigned = preg_match('/ unsigned/i', $field['type']);
$length = 1;
break;
case 'smallint':
$type[] = 'integer';
$unsigned = preg_match('/ unsigned/i', $field['type']);
$length = 2;
break;
case 'mediumint':
$type[] = 'integer';
$unsigned = preg_match('/ unsigned/i', $field['type']);
$length = 3;
break;
case 'int':
case 'integer':
case 'serial':
$type[] = 'integer';
$unsigned = preg_match('/ unsigned/i', $field['type']);
$length = 4;
break;
case 'bigint':
case 'bigserial':
$type[] = 'integer';
$unsigned = preg_match('/ unsigned/i', $field['type']);
$length = 8;
break;
case 'clob':
case 'tinytext':
case 'mediumtext':
case 'longtext':
case 'text':
case 'varchar':
case 'varchar2':
$fixed = false;
case 'char':
$type[] = 'text';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
} elseif (strstr($dbType, 'text')) {
$type[] = 'clob';
}
if ($fixed !== false) {
$fixed = true;
}
break;
case 'date':
$type[] = 'date';
$length = null;
break;
case 'datetime':
case 'timestamp':
$type[] = 'timestamp';
$length = null;
break;
case 'time':
$type[] = 'time';
$length = null;
break;
case 'float':
case 'double':
case 'real':
$type[] = 'float';
$length = null;
break;
case 'decimal':
case 'numeric':
$type[] = 'decimal';
$length = null;
break;
case 'tinyblob':
case 'mediumblob':
case 'longblob':
case 'blob':
$type[] = 'blob';
$length = null;
break;
case 'year':
$type[] = 'integer';
$type[] = 'date';
$length = null;
break;
default:
throw new Doctrine_DataDict_Exception('unknown database attribute type: '.$dbType);
}
return array('type' => $type,
'length' => $length,
'unsigned' => $unsigned,
'fixed' => $fixed);
}
}
?>