MySqlPlatform.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,
    Doctrine\DBAL\Schema\TableDiff;
 
class MySqlPlatform extends AbstractPlatform
{
    public function getIdentifierQuoteCharacter()
    {
        return '`';
    }
    
    public function getRegexpExpression()
    {
        return 'RLIKE';
    }
 
    public function getGuidExpression()
    {
        return 'UUID()';
    }
 
    public function getLocateExpression($str, $substr, $startPos = false)
    {
        if ($startPos == false) {
            return 'LOCATE(' . $substr . ', ' . $str . ')';
        } else {
            return 'LOCATE(' . $substr . ', ' . $str . ', '.$startPos.')';
        }
    }
 
    public function getConcatExpression()
    {
        $args = func_get_args();
        return 'CONCAT(' . join(', ', (array) $args) . ')';
    }
 
    public function getListDatabasesSQL()
    {
        return 'SHOW DATABASES';
    }
 
    public function getListTableConstraintsSQL($table)
    {
        return 'SHOW INDEX FROM ' . $table;
    }
 
    public function getListTableIndexesSQL($table)
    {
        return 'SHOW INDEX FROM ' . $table;
    }
 
    public function getListViewsSQL($database)
    {
        return "SELECT * FROM information_schema.VIEWS WHERE TABLE_SCHEMA = '".$database."'";
    }
 
    public function getListTableForeignKeysSQL($table, $database = null)
    {
        $sql = "SELECT DISTINCT k.`CONSTRAINT_NAME`, k.`COLUMN_NAME`, k.`REFERENCED_TABLE_NAME`, ".
               "k.`REFERENCED_COLUMN_NAME` /*!50116 , c.update_rule, c.delete_rule */ ".
               "FROM information_schema.key_column_usage k /*!50116 ".
               "INNER JOIN information_schema.referential_constraints c ON ".
               "  c.constraint_name = k.constraint_name AND ".
               "  c.table_name = '$table' */ WHERE k.table_name = '$table'";
 
        if ($database) {
            $sql .= " AND k.table_schema = '$database' /*!50116 AND c.constraint_schema = '$database' */";
        }
 
        $sql .= " AND k.`REFERENCED_COLUMN_NAME` is not NULL";
 
        return $sql;
    }
 
    public function getCreateViewSQL($name, $sql)
    {
        return 'CREATE VIEW ' . $name . ' AS ' . $sql;
    }
 
    public function getDropViewSQL($name)
    {
        return 'DROP VIEW '. $name;
    }
 
    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 . ')' : 'VARCHAR(255)');
    }
 
    public function getClobTypeDeclarationSQL(array $field)
    {
        if ( ! empty($field['length']) && is_numeric($field['length'])) {
            $length = $field['length'];
            if ($length <= 255) {
                return 'TINYTEXT';
            } else if ($length <= 65532) {
                return 'TEXT';
            } else if ($length <= 16777215) {
                return 'MEDIUMTEXT';
            }
        }
        return 'LONGTEXT';
    }
 
    public function getDateTimeTypeDeclarationSQL(array $fieldDeclaration)
    {
        if (isset($fieldDeclaration['version']) && $fieldDeclaration['version'] == true) {
            return 'TIMESTAMP';
        } else {
            return 'DATETIME';
        }
    }
    
    public function getDateTypeDeclarationSQL(array $fieldDeclaration)
    {
        return 'DATE';
    }
 
    public function getTimeTypeDeclarationSQL(array $fieldDeclaration) 
    {
        return 'TIME';
    }   
 
    public function getBooleanTypeDeclarationSQL(array $field)
    {
        return 'TINYINT(1)';
    }
 
    public function getCollationFieldDeclaration($collation)
    {
        return 'COLLATE ' . $collation;
    }
    
    public function prefersIdentityColumns()
    {
        return true;
    }
    
    public function supportsIdentityColumns()
    {
        return true;
    }
 
    public function getShowDatabasesSQL()
    {
        return 'SHOW DATABASES';
    }
    
    public function getListTablesSQL()
    {
        return 'SHOW FULL TABLES WHERE Table_type = "BASE TABLE"';
    }
 
    public function getListTableColumnsSQL($table)
    {
        return 'DESCRIBE ' . $table;
    }
 
    public function getCreateDatabaseSQL($name)
    {
        return 'CREATE DATABASE ' . $name;
    }
    
    public function getDropDatabaseSQL($name)
    {
        return 'DROP DATABASE ' . $name;
    }
    
    protected function _getCreateTableSQL($tableName, array $columns, array $options = array())
    {
        $queryFields = $this->getColumnDeclarationListSQL($columns);
 
        if (isset($options['uniqueConstraints']) && ! empty($options['uniqueConstraints'])) {
            foreach ($options['uniqueConstraints'] as $index => $definition) {
                $queryFields .= ', ' . $this->getUniqueConstraintDeclarationSQL($index, $definition);
            }
        }
 
        // add all indexes
        if (isset($options['indexes']) && ! empty($options['indexes'])) {
            foreach($options['indexes'] as $index => $definition) {
                $queryFields .= ', ' . $this->getIndexDeclarationSQL($index, $definition);
            }
        }
 
        // attach all primary keys
        if (isset($options['primary']) && ! empty($options['primary'])) {
            $keyColumns = array_unique(array_values($options['primary']));
            $queryFields .= ', PRIMARY KEY(' . implode(', ', $keyColumns) . ')';
        }
 
        $query = 'CREATE ';
        if (!empty($options['temporary'])) {
            $query .= 'TEMPORARY ';
        }
        $query.= 'TABLE ' . $tableName . ' (' . $queryFields . ')';
 
        $optionStrings = array();
 
        if (isset($options['comment'])) {
            $optionStrings['comment'] = 'COMMENT = ' . $this->quote($options['comment'], 'text');
        }
        if (isset($options['charset'])) {
            $optionStrings['charset'] = 'DEFAULT CHARACTER SET ' . $options['charset'];
            if (isset($options['collate'])) {
                $optionStrings['charset'] .= ' COLLATE ' . $options['collate'];
            }
        }
 
        // get the type of the table
        if (isset($options['engine'])) {
            $optionStrings[] = 'ENGINE = ' . $options['engine'];
        } else {
            // default to innodb
            $optionStrings[] = 'ENGINE = InnoDB';
        }
        
        if ( ! empty($optionStrings)) {
            $query.= ' '.implode(' ', $optionStrings);
        }
        $sql[] = $query;
 
        if (isset($options['foreignKeys'])) {
            foreach ((array) $options['foreignKeys'] as $definition) {
                $sql[] = $this->getCreateForeignKeySQL($definition, $tableName);
            }
        }
        
        return $sql;
    }
    
    public function getAlterTableSQL(TableDiff $diff)
    {
        $queryParts = array();
        if ($diff->newName !== false) {
            $queryParts[] =  'RENAME TO ' . $diff->newName;
        }
 
        foreach ($diff->addedColumns AS $fieldName => $column) {
            $queryParts[] = 'ADD ' . $this->getColumnDeclarationSQL($column->getQuotedName($this), $column->toArray());
        }
 
        foreach ($diff->removedColumns AS $column) {
            $queryParts[] =  'DROP ' . $column->getQuotedName($this);
        }
 
        foreach ($diff->changedColumns AS $columnDiff) {
            /* @var $columnDiff Doctrine\DBAL\Schema\ColumnDiff */
            $column = $columnDiff->column;
            $queryParts[] =  'CHANGE ' . ($columnDiff->oldColumnName) . ' '
                    . $this->getColumnDeclarationSQL($column->getQuotedName($this), $column->toArray());
        }
 
        foreach ($diff->renamedColumns AS $oldColumnName => $column) {
            $queryParts[] =  'CHANGE ' . $oldColumnName . ' '
                    . $this->getColumnDeclarationSQL($column->getQuotedName($this), $column->toArray());
        }
 
        $sql = array();
        if (count($queryParts) > 0) {
            $sql[] = 'ALTER TABLE ' . $diff->name . ' ' . implode(", ", $queryParts);
        }
        $sql = array_merge($sql, $this->_getAlterTableIndexForeignKeySQL($diff));
        return $sql;
    }
    
    public function getIntegerTypeDeclarationSQL(array $field)
    {
        return 'INT' . $this->_getCommonIntegerTypeDeclarationSQL($field);
    }
 
    public function getBigIntTypeDeclarationSQL(array $field)
    {
        return 'BIGINT' . $this->_getCommonIntegerTypeDeclarationSQL($field);
    }
 
    public function getSmallIntTypeDeclarationSQL(array $field)
    {
        return 'SMALLINT' . $this->_getCommonIntegerTypeDeclarationSQL($field);
    }
 
    protected function _getCommonIntegerTypeDeclarationSQL(array $columnDef)
    {
        $autoinc = '';
        if ( ! empty($columnDef['autoincrement'])) {
            $autoinc = ' AUTO_INCREMENT';
        }
        $unsigned = (isset($columnDef['unsigned']) && $columnDef['unsigned']) ? ' UNSIGNED' : '';
 
        return $unsigned . $autoinc;
    }
    
    public function getAdvancedForeignKeyOptionsSQL(\Doctrine\DBAL\Schema\ForeignKeyConstraint $foreignKey)
    {
        $query = '';
        if ($foreignKey->hasOption('match')) {
            $query .= ' MATCH ' . $foreignKey->getOption('match');
        }
        $query .= parent::getAdvancedForeignKeyOptionsSQL($foreignKey);
        return $query;
    }
    
    public function getDropIndexSQL($index, $table=null)
    {
        if($index instanceof \Doctrine\DBAL\Schema\Index) {
            $index = $index->getQuotedName($this);
        } else if(!is_string($index)) {
            throw new \InvalidArgumentException('MysqlPlatform::getDropIndexSQL() expects $index parameter to be string or \Doctrine\DBAL\Schema\Index.');
        }
        
        if($table instanceof \Doctrine\DBAL\Schema\Table) {
            $table = $table->getQuotedName($this);
        } else if(!is_string($table)) {
            throw new \InvalidArgumentException('MysqlPlatform::getDropIndexSQL() expects $table parameter to be string or \Doctrine\DBAL\Schema\Table.');
        }
 
        return 'DROP INDEX ' . $index . ' ON ' . $table;
    }
    
    public function getDropTableSQL($table)
    {
        if ($table instanceof \Doctrine\DBAL\Schema\Table) {
            $table = $table->getQuotedName($this);
        } else if(!is_string($table)) {
            throw new \InvalidArgumentException('MysqlPlatform::getDropTableSQL() expects $table parameter to be string or \Doctrine\DBAL\Schema\Table.');
        }
 
        return 'DROP TABLE ' . $table;
    }
 
    public function getSetTransactionIsolationSQL($level)
    {
        return 'SET SESSION TRANSACTION ISOLATION LEVEL ' . $this->_getTransactionIsolationLevelSQL($level);
    }
 
    public function getName()
    {
        return 'mysql';
    }
 
    public function getReadLockSQL()
    {
        return 'LOCK IN SHARE MODE';
    }
 
    protected function initializeDoctrineTypeMappings()
    {
        $this->doctrineTypeMapping = array(
            'tinyint'       => 'boolean',
            'smallint'      => 'smallint',
            'mediumint'     => 'integer',
            'int'           => 'integer',
            'integer'       => 'integer',
            'bigint'        => 'bigint',
            'tinytext'      => 'text',
            'mediumtext'    => 'text',
            'longtext'      => 'text',
            'text'          => 'text',
            'varchar'       => 'string',
            'string'        => 'string',
            'char'          => 'string',
            'date'          => 'date',
            'datetime'      => 'datetime',
            'timestamp'     => 'datetime',
            'time'          => 'time',
            'float'         => 'float',
            'double'        => 'float',
            'real'          => 'float',
            'decimal'       => 'decimal',
            'numeric'       => 'decimal',
            'year'          => 'date',
        );
    }
}