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32 lines
| 1 | <?php declare(strict_types = 1); |
| 2 | |
| 3 | namespace MailPoet\Migrations\Db; |
| 4 | |
| 5 | if (!defined('ABSPATH')) exit; |
| 6 | |
| 7 | |
| 8 | use MailPoet\Entities\StatisticsNewsletterEntity; |
| 9 | use MailPoet\Migrator\DbMigration; |
| 10 | |
| 11 | class Migration_20260709_120000_Db extends DbMigration { |
| 12 | public function run(): void { |
| 13 | $statisticsNewslettersTable = $this->getTableName(StatisticsNewsletterEntity::class); |
| 14 | |
| 15 | // The campaign stats "Unopened" listing filters recipients of a |
| 16 | // subscriber-timezone campaign with `newsletter_id = ? AND queue_id IN (...)`. |
| 17 | // The other statistics tables already carry a queue_id index, but here the |
| 18 | // best existing index is (newsletter_id), which reads every recipient of |
| 19 | // the newsletter and discards the rows outside the selected batches. |
| 20 | // Leading with (newsletter_id, queue_id) binds both predicates, so only |
| 21 | // the selected batches are read; the trailing subscriber_id serves the |
| 22 | // per-row anti-join lookup against statistics_opens (subscriber_id, |
| 23 | // newsletter_id) from the index itself. |
| 24 | if (!$this->indexExists($statisticsNewslettersTable, 'newsletter_id_queue_id_subscriber_id')) { |
| 25 | $this->connection->executeQuery( |
| 26 | "ALTER TABLE `{$statisticsNewslettersTable}` |
| 27 | ADD INDEX `newsletter_id_queue_id_subscriber_id` (`newsletter_id`, `queue_id`, `subscriber_id`)" |
| 28 | ); |
| 29 | } |
| 30 | } |
| 31 | } |
| 32 |