Migration_29.php
| 1 | <?php |
| 2 | |
| 3 | namespace IAWP\Migrations; |
| 4 | |
| 5 | use IAWP\Database; |
| 6 | use IAWP\Query; |
| 7 | /** @internal */ |
| 8 | class Migration_29 extends \IAWP\Migrations\Step_Migration |
| 9 | { |
| 10 | /** |
| 11 | * @return int |
| 12 | */ |
| 13 | protected function database_version() : int |
| 14 | { |
| 15 | return 29; |
| 16 | } |
| 17 | /** |
| 18 | * @return array |
| 19 | */ |
| 20 | protected function queries() : array |
| 21 | { |
| 22 | return [$this->rename_visitor_id_column(), $this->create_new_visitor_id_column(), $this->drop_table_if_exists(Query::get_table_name(Query::VISITORS)), $this->create_visitors_table(), $this->populate_visitors_table(), $this->populate_token_id_column(), $this->add_index(), $this->remove_very_old_visitors_archive_table()]; |
| 23 | } |
| 24 | private function rename_visitor_id_column() : string |
| 25 | { |
| 26 | $sessions_table = Query::get_table_name(Query::SESSIONS); |
| 27 | return "\n ALTER TABLE {$sessions_table} CHANGE COLUMN visitor_id old_visitor_id varchar(32);\n "; |
| 28 | } |
| 29 | private function create_new_visitor_id_column() : string |
| 30 | { |
| 31 | $sessions_table = Query::get_table_name(Query::SESSIONS); |
| 32 | return "\n ALTER TABLE {$sessions_table} ADD COLUMN visitor_id BIGINT(20) UNSIGNED AFTER old_visitor_id\n "; |
| 33 | } |
| 34 | private function create_visitors_table() : string |
| 35 | { |
| 36 | $visitors_table = Query::get_table_name(Query::VISITORS); |
| 37 | $character_set = Database::character_set(); |
| 38 | $collation = Database::collation(); |
| 39 | return "\n CREATE TABLE IF NOT EXISTS {$visitors_table} (\n visitor_id BIGINT(20) UNSIGNED AUTO_INCREMENT,\n hash VARCHAR(32) NOT NULL,\n PRIMARY KEY (visitor_id),\n UNIQUE INDEX (hash)\n ) DEFAULT CHARACTER SET {$character_set} COLLATE {$collation};\n "; |
| 40 | } |
| 41 | private function populate_visitors_table() : string |
| 42 | { |
| 43 | $sessions_table = Query::get_table_name(Query::SESSIONS); |
| 44 | $visitors_table = Query::get_table_name(Query::VISITORS); |
| 45 | return "\n INSERT INTO {$visitors_table} (hash)\n SELECT DISTINCT old_visitor_id\n FROM {$sessions_table}\n WHERE old_visitor_id IS NOT NULL\n "; |
| 46 | } |
| 47 | private function populate_token_id_column() : string |
| 48 | { |
| 49 | $sessions_table = Query::get_table_name(Query::SESSIONS); |
| 50 | $visitors_table = Query::get_table_name(Query::VISITORS); |
| 51 | return "\n UPDATE {$sessions_table} AS sessions\n JOIN {$visitors_table} AS visitors on sessions.old_visitor_id = visitors.hash\n SET sessions.visitor_id = visitors.visitor_id\n "; |
| 52 | } |
| 53 | private function add_index() : string |
| 54 | { |
| 55 | $sessions_table = Query::get_table_name(Query::SESSIONS); |
| 56 | return "\n CREATE INDEX new_bigint_visitor_id ON {$sessions_table} (visitor_id)\n "; |
| 57 | } |
| 58 | private function remove_very_old_visitors_archive_table() : ?string |
| 59 | { |
| 60 | $visitors_archive_table = Query::get_table_name(Query::VISITORS_1_16_ARCHIVE); |
| 61 | if (\strlen($visitors_archive_table) > 64) { |
| 62 | return null; |
| 63 | } |
| 64 | return "\n DROP TABLE IF EXISTS {$visitors_archive_table};\n "; |
| 65 | } |
| 66 | } |
| 67 |