Migration_43.php
| 1 | <?php |
| 2 | |
| 3 | namespace IAWP\Migrations; |
| 4 | |
| 5 | /** @internal */ |
| 6 | class Migration_43 extends \IAWP\Migrations\Step_Migration |
| 7 | { |
| 8 | /** |
| 9 | * @return int |
| 10 | */ |
| 11 | protected function database_version() : int |
| 12 | { |
| 13 | return 43; |
| 14 | } |
| 15 | /** |
| 16 | * @return array |
| 17 | */ |
| 18 | protected function queries() : array |
| 19 | { |
| 20 | return [$this->add_new_visitor_column(), $this->populate_new_visitor_column()]; |
| 21 | } |
| 22 | private function add_new_visitor_column() : string |
| 23 | { |
| 24 | return "\n ALTER TABLE {$this->tables::sessions()} \n ADD COLUMN is_first_session BOOLEAN;\n "; |
| 25 | } |
| 26 | private function populate_new_visitor_column() : string |
| 27 | { |
| 28 | return "\n UPDATE {$this->tables::sessions()} AS sessions\n JOIN (\n SELECT\n visitor_id,\n MIN(session_id) AS first_session_id\n FROM {$this->tables::sessions()}\n GROUP BY visitor_id\n ) AS first_session\n ON sessions.visitor_id = first_session.visitor_id\n SET sessions.is_first_session = IF(sessions.session_id = first_session.first_session_id, 1, 0)\n "; |
| 29 | } |
| 30 | } |
| 31 |