public function addPrimaryKey($tableName, $schemaName, Db\IndexInterface $index)
    {
        return $this->dialect->addPrimaryKey($tableName, $schemaName, $index);
    }
public function addPrimaryKey($tableName, $schemaName, Db\IndexInterface $index)
    {
        return $this->dialect->addPrimaryKey($tableName, $schemaName, $index);
    }
public function addPrimaryKey ( $ tableName , $ schemaName , Db \ IndexInterface $ index ) { return $ this -> dialect -> addPrimaryKey ( $ tableName , $ schemaName , $ index ) ; }
Generates SQL to add the primary key to a table

@param string                     $tableName
@param string                     $schemaName
@param \Phalcon\Db\IndexInterface $index

@return string
Generates SQL to add the primary key to a table