365 lines
11 KiB
PHP
365 lines
11 KiB
PHP
<?php
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#namespace Doctrine::DBAL::Platforms;
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/**
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* Enter description here...
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*
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* @since 2.0
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*/
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class Doctrine_DBAL_Platforms_SqlitePlatform extends Doctrine_DBAL_Platforms_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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* Returns the md5 sum of the data that SQLite's md5() function receives.
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*
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* @param mixed $data
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* @return string
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*/
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public static function md5Impl($data)
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{
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return md5($data);
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}
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/**
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* Returns the modules of the data that SQLite's mod() function receives.
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*
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* @param integer $dividend
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* @param integer $divisor
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* @return string
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*/
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public static function modImpl($dividend, $divisor)
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{
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return $dividend % $divisor;
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}
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/**
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* locate
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* returns the position of the first occurrence of substring $substr in string $str that
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* SQLite's locate() function receives
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*
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* @param string $substr literal string to find
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* @param string $str literal string
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* @return string
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*/
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public static function locateImpl($substr, $str)
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{
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return strpos($str, $substr);
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}
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public static function sha1Impl($str)
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{
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return sha1($str);
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}
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public static function ltrimImpl($str)
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{
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return ltrim($str);
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}
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public static function rtrimImpl($str)
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{
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return rtrim($str);
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}
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public static function trimImpl($str)
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{
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return trim($str);
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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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* Returns a string to call a function to compute the
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* soundex encoding of a string
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*
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* The string "?000" is returned if the argument is NULL.
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*
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* @param string $value
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* @return string SQL soundex function with given parameter
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*/
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public function getSoundexExpression($value)
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{
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return 'SOUNDEX(' . $value . ')';
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}
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/**
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* Return string to call a variable with the current timestamp inside an SQL statement
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* There are three special variables for current date and time.
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*
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* @return string sqlite function as string
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* @override
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*/
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public function getNowExpression($type = 'timestamp')
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{
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switch ($type) {
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case 'time':
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return 'time(\'now\')';
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case 'date':
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return 'date(\'now\')';
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case 'timestamp':
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default:
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return 'datetime(\'now\')';
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}
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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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* @override
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*/
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public function getRandomExpression()
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{
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return '((RANDOM() + 2147483648) / 4294967296)';
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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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* Note: Not SQL92, but common functionality.
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*
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* SQLite only supports the 2 parameter variant of this function
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*
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* @param string $value an sql string literal or column name/alias
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* @param integer $position where to start the substring portion
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* @param integer $length the substring portion length
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* @return string SQL substring function with given parameters
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* @override
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*/
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public function getSubstringExpression($value, $position, $length = null)
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{
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if ($length !== null) {
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return 'SUBSTR(' . $value . ', ' . $position . ', ' . $length . ')';
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}
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return 'SUBSTR(' . $value . ', ' . $position . ', LENGTH(' . $value . '))';
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}
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/**
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* Obtain DBMS specific SQL code portion needed to declare an text type
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* field to be used in statements like CREATE TABLE.
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*
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* @param array $field associative array with the name of the properties
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* of the field being declared as array indexes. Currently, the types
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* of supported field properties are as follows:
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*
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* length
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* Integer value that determines the maximum length of the text
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* field. If this argument is missing the field should be
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* declared to have the longest length allowed by the DBMS.
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*
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* default
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* Text value to be used as default for this field.
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*
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* notnull
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* Boolean flag that indicates whether this field is constrained
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* to not be set to null.
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* @author Lukas Smith (PEAR MDB2 library)
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* @return string DBMS specific SQL code portion that should be used to
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* declare the specified field.
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* @override
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*/
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public function getNativeDeclaration(array $field)
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{
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if ( ! isset($field['type'])) {
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throw new Doctrine_DataDict_Exception('Missing column type.');
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}
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switch ($field['type']) {
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case 'text':
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case 'object':
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case 'array':
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case 'string':
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case 'char':
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case 'gzip':
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case 'varchar':
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$length = (isset($field['length']) && $field['length']) ? $field['length'] : null;
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$fixed = ((isset($field['fixed']) && $field['fixed']) || $field['type'] == 'char') ? true : false;
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return $fixed ? ($length ? 'CHAR('.$length.')' : 'CHAR('.$this->conn->getAttribute(Doctrine::ATTR_DEFAULT_TEXTFLD_LENGTH).')')
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: ($length ? 'VARCHAR('.$length.')' : 'TEXT');
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case 'clob':
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if ( ! empty($field['length'])) {
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$length = $field['length'];
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if ($length <= 255) {
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return 'TINYTEXT';
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} elseif ($length <= 65535) {
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return 'TEXT';
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} elseif ($length <= 16777215) {
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return 'MEDIUMTEXT';
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}
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}
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return 'LONGTEXT';
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case 'blob':
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if ( ! empty($field['length'])) {
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$length = $field['length'];
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if ($length <= 255) {
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return 'TINYBLOB';
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} elseif ($length <= 65535) {
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return 'BLOB';
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} elseif ($length <= 16777215) {
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return 'MEDIUMBLOB';
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}
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}
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return 'LONGBLOB';
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case 'enum':
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case 'integer':
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case 'boolean':
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case 'int':
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return 'INTEGER';
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case 'date':
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return 'DATE';
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case 'time':
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return 'TIME';
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case 'timestamp':
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return 'DATETIME';
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case 'float':
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case 'double':
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return 'DOUBLE';//($this->conn->options['fixed_float'] ? '('.
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//($this->conn->options['fixed_float']+2).','.$this->conn->options['fixed_float'].')' : '');
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case 'decimal':
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$length = !empty($field['length']) ? $field['length'] : 18;
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$scale = !empty($field['scale']) ? $field['scale'] : $this->conn->getAttribute(Doctrine::ATTR_DECIMAL_PLACES);
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return 'DECIMAL('.$length.','.$scale.')';
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}
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throw new Doctrine_DataDict_Exception('Unknown field type \'' . $field['type'] . '\'.');
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}
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/**
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* Maps a native array description of a field to Doctrine datatype and length
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*
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* @param array $field native field description
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* @return array containing the various possible types, length, sign, fixed
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* @override
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*/
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public function getPortableDeclaration(array $field)
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{
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$dbType = strtolower($field['type']);
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$length = (isset($field['length'])) ? $field['length'] : null;
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$unsigned = (isset($field['unsigned'])) ? $field['unsigned'] : null;
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$fixed = null;
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$type = array();
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if ( ! isset($field['name'])) {
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$field['name'] = '';
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}
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switch ($dbType) {
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case 'boolean':
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$type[] = 'boolean';
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break;
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case 'tinyint':
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$type[] = 'integer';
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$type[] = 'boolean';
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if (preg_match('/^(is|has)/', $field['name'])) {
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$type = array_reverse($type);
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}
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$unsigned = preg_match('/ unsigned/i', $field['type']);
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$length = 1;
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break;
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case 'smallint':
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$type[] = 'integer';
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$unsigned = preg_match('/ unsigned/i', $field['type']);
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$length = 2;
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break;
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case 'mediumint':
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$type[] = 'integer';
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$unsigned = preg_match('/ unsigned/i', $field['type']);
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$length = 3;
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break;
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case 'int':
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case 'integer':
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case 'serial':
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$type[] = 'integer';
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$unsigned = preg_match('/ unsigned/i', $field['type']);
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$length = 4;
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break;
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case 'bigint':
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case 'bigserial':
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$type[] = 'integer';
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$unsigned = preg_match('/ unsigned/i', $field['type']);
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$length = 8;
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break;
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case 'clob':
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case 'tinytext':
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case 'mediumtext':
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case 'longtext':
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case 'text':
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case 'varchar':
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case 'varchar2':
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$fixed = false;
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case 'char':
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$type[] = 'text';
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if ($length == '1') {
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$type[] = 'boolean';
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if (preg_match('/^(is|has)/', $field['name'])) {
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$type = array_reverse($type);
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}
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} elseif (strstr($dbType, 'text')) {
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$type[] = 'clob';
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}
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if ($fixed !== false) {
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$fixed = true;
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}
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break;
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case 'date':
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$type[] = 'date';
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$length = null;
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break;
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case 'datetime':
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case 'timestamp':
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$type[] = 'timestamp';
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$length = null;
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break;
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case 'time':
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$type[] = 'time';
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$length = null;
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break;
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case 'float':
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case 'double':
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case 'real':
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$type[] = 'float';
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$length = null;
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break;
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case 'decimal':
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case 'numeric':
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$type[] = 'decimal';
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$length = null;
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break;
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case 'tinyblob':
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case 'mediumblob':
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case 'longblob':
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case 'blob':
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$type[] = 'blob';
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$length = null;
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break;
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case 'year':
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$type[] = 'integer';
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$type[] = 'date';
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$length = null;
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break;
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default:
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throw new Doctrine_DataDict_Exception('unknown database attribute type: '.$dbType);
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}
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return array('type' => $type,
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'length' => $length,
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'unsigned' => $unsigned,
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'fixed' => $fixed);
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}
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}
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?>
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