SqlitePlatform.php

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<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information, see
 * <http://www.doctrine-project.org>.
 */
 
namespace Doctrine\DBAL\Platforms;
 
use Doctrine\DBAL\DBALException;
 
class SqlitePlatform extends AbstractPlatform
{
    public function getRegexpExpression()
    {
        return 'RLIKE';
    }
 
    public function getNowExpression($type = 'timestamp')
    {
        switch ($type) {
            case 'time':
                return 'time(\'now\')';
            case 'date':
                return 'date(\'now\')';
            case 'timestamp':
            default:
                return 'datetime(\'now\')';
        }
    }
 
    public function getTrimExpression($str, $pos = self::TRIM_UNSPECIFIED, $char = false)
    {
        $trimFn = '';
        $trimChar = ($char != false) ? (', ' . $char) : '';
 
        if ($pos == self::TRIM_LEADING) {
            $trimFn = 'LTRIM';
        } else if($pos == self::TRIM_TRAILING) {
            $trimFn = 'RTRIM';
        } else {
            $trimFn = 'TRIM';
        }
 
        return $trimFn . '(' . $str . $trimChar . ')';
    }
 
    public function getSubstringExpression($value, $position, $length = null)
    {
        if ($length !== null) {
            return 'SUBSTR(' . $value . ', ' . $position . ', ' . $length . ')';
        }
        return 'SUBSTR(' . $value . ', ' . $position . ', LENGTH(' . $value . '))';
    }
 
    public function getLocateExpression($str, $substr, $startPos = false)
    {
        if ($startPos == false) {
            return 'LOCATE('.$str.', '.$substr.')';
        } else {
            return 'LOCATE('.$str.', '.$substr.', '.$startPos.')';
        }
    }
 
    protected function _getTransactionIsolationLevelSQL($level)
    {
        switch ($level) {
            case \Doctrine\DBAL\Connection::TRANSACTION_READ_UNCOMMITTED:
                return 0;
            case \Doctrine\DBAL\Connection::TRANSACTION_READ_COMMITTED:
            case \Doctrine\DBAL\Connection::TRANSACTION_REPEATABLE_READ:
            case \Doctrine\DBAL\Connection::TRANSACTION_SERIALIZABLE:
                return 1;
            default:
                return parent::_getTransactionIsolationLevelSQL($level);
        }
    }
 
    public function getSetTransactionIsolationSQL($level)
    {
        return 'PRAGMA read_uncommitted = ' . $this->_getTransactionIsolationLevelSQL($level);
    }
 
    public function prefersIdentityColumns()
    {
        return true;
    }
    
    public function getBooleanTypeDeclarationSQL(array $field)
    {
        return 'BOOLEAN';
    }
 
    public function getIntegerTypeDeclarationSQL(array $field)
    {
        return $this->_getCommonIntegerTypeDeclarationSQL($field);
    }
 
    public function getBigIntTypeDeclarationSQL(array $field)
    {
        return $this->_getCommonIntegerTypeDeclarationSQL($field);
    }
 
    public function getTinyIntTypeDeclarationSql(array $field)
    {
        return $this->_getCommonIntegerTypeDeclarationSQL($field);
    }
 
    public function getSmallIntTypeDeclarationSQL(array $field)
    {
        return $this->_getCommonIntegerTypeDeclarationSQL($field);
    }
 
    public function getMediumIntTypeDeclarationSql(array $field)
    {
        return $this->_getCommonIntegerTypeDeclarationSQL($field);
    }
 
    public function getDateTimeTypeDeclarationSQL(array $fieldDeclaration)
    {
        return 'DATETIME';
    }
    
    public function getDateTypeDeclarationSQL(array $fieldDeclaration)
    {
        return 'DATE';
    }
 
    public function getTimeTypeDeclarationSQL(array $fieldDeclaration)
    {
        return 'TIME';
    }
 
    protected function _getCommonIntegerTypeDeclarationSQL(array $columnDef)
    {
        $autoinc = ! empty($columnDef['autoincrement']) ? ' AUTOINCREMENT' : '';
        $pk = ! empty($columnDef['primary']) && ! empty($autoinc) ? ' PRIMARY KEY' : '';
 
        return 'INTEGER' . $pk . $autoinc;
    }
 
    protected function _getCreateTableSQL($name, array $columns, array $options = array())
    {
        $queryFields = $this->getColumnDeclarationListSQL($columns);
 
        $autoinc = false;
        foreach($columns as $field) {
            if (isset($field['autoincrement']) && $field['autoincrement']) {
                $autoinc = true;
                break;
            }
        }
 
        if ( ! $autoinc && isset($options['primary']) && ! empty($options['primary'])) {
            $keyColumns = array_unique(array_values($options['primary']));
            $keyColumns = array_map(array($this, 'quoteIdentifier'), $keyColumns);
            $queryFields.= ', PRIMARY KEY('.implode(', ', $keyColumns).')';
        }
 
        $query[] = 'CREATE TABLE ' . $name . ' (' . $queryFields . ')';
 
        if (isset($options['indexes']) && ! empty($options['indexes'])) {
            foreach ($options['indexes'] as $index => $indexDef) {
                $query[] = $this->getCreateIndexSQL($indexDef, $name);
            }
        }
        if (isset($options['unique']) && ! empty($options['unique'])) {
            foreach ($options['unique'] as $index => $indexDef) {
                $query[] = $this->getCreateIndexSQL($indexDef, $name);
            }
        }
        return $query;
    }
 
    public function getVarcharTypeDeclarationSQL(array $field)
    {
        if ( ! isset($field['length'])) {
            if (array_key_exists('default', $field)) {
                $field['length'] = $this->getVarcharDefaultLength();
            } else {
                $field['length'] = false;
            }
        }
        $length = ($field['length'] <= $this->getVarcharMaxLength()) ? $field['length'] : false;
        $fixed = (isset($field['fixed'])) ? $field['fixed'] : false;
 
        return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(255)')
                : ($length ? 'VARCHAR(' . $length . ')' : 'TEXT');
    }
    
    public function getClobTypeDeclarationSQL(array $field)
    {
        return 'CLOB';
    }
 
    public function getListTableConstraintsSQL($table)
    {
        return "SELECT sql FROM sqlite_master WHERE type='index' AND tbl_name = '$table' AND sql NOT NULL ORDER BY name";
    }
 
    public function getListTableColumnsSQL($table)
    {
        return "PRAGMA table_info($table)";
    }
 
    public function getListTableIndexesSQL($table)
    {
        return "PRAGMA index_list($table)";
    }
 
    public function getListTablesSQL()
    {
        return "SELECT name FROM sqlite_master WHERE type = 'table' AND name != 'sqlite_sequence' "
             . "UNION ALL SELECT name FROM sqlite_temp_master "
             . "WHERE type = 'table' ORDER BY name";
    }
 
    public function getListViewsSQL($database)
    {
        return "SELECT name, sql FROM sqlite_master WHERE type='view' AND sql NOT NULL";
    }
 
    public function getCreateViewSQL($name, $sql)
    {
        return 'CREATE VIEW ' . $name . ' AS ' . $sql;
    }
 
    public function getDropViewSQL($name)
    {
        return 'DROP VIEW '. $name;
    }
 
    public function supportsForeignKeyConstraints()
    {
        return false;
    }
 
    public function supportsAlterTable()
    {
        return false;
    }
 
    public function supportsIdentityColumns()
    {
        return true;
    }
 
    public function getName()
    {
        return 'sqlite';
    }
 
    public function getTruncateTableSQL($tableName, $cascade = false)
    {
        return 'DELETE FROM '.$tableName;
    }
 
    static public function udfSqrt($value)
    {
        return sqrt($value);
    }
 
    static public function udfMod($a, $b)
    {
        return ($a % $b);
    }
 
    static public function udfLocate($str, $substr, $offset = 0)
    {
        $pos = strpos($str, $substr, $offset);
        if ($pos !== false) {
            return $pos+1;
        }
        return 0;
    }
 
    public function getForUpdateSql()
    {
        return '';
    }
 
    protected function initializeDoctrineTypeMappings()
    {
        $this->doctrineTypeMapping = array(
            'boolean'       => 'boolean',
            'tinyint'       => 'boolean',
            'smallint'      => 'smallint',
            'mediumint'     => 'integer',
            'int'           => 'integer',
            'integer'       => 'integer',
            'serial'        => 'integer',
            'bigint'        => 'bigint',
            'bigserial'     => 'bigint',
            'clob'          => 'text',
            'tinytext'      => 'text',
            'mediumtext'    => 'text',
            'longtext'      => 'text',
            'text'          => 'text',
            'varchar'       => 'string',
            'varchar2'      => 'string',
            'nvarchar'      => 'string',
            'image'         => 'string',
            'ntext'         => 'string',
            'char'          => 'string',
            'date'          => 'date',
            'datetime'      => 'datetime',
            'timestamp'     => 'datetime',
            'time'          => 'time',
            'float'         => 'float',
            'double'        => 'float',
            'real'          => 'float',
            'decimal'       => 'decimal',
            'numeric'       => 'decimal',
        );
    }
}