Create new indices,

change columnst to bigint, create named foreign keys

Signed-off-by: Anna Larch <anna@nextcloud.com>

1 files changed, 138 insertions, 0 deletions

diff --git a/lib/Migration/Version1130Date20220412111833.php b/lib/Migration/Version1130Date20220412111833.php
new file mode 100644
index 000000000..595b39ecd
--- /dev/null
+++ b/lib/Migration/Version1130Date20220412111833.php
@@ -0,0 +1,138 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Anna Larch <anna.larch@gmx.net>
+ *
+ * @author Anna Larch <anna.larch@gmx.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Mail\Migration;
+
+use Closure;
+use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
+use OCP\DB\ISchemaWrapper;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+class Version1130Date20220412111833 extends SimpleMigrationStep {
+	/** @var IDBConnection $connection */
+	private $connection;
+
+	public function __construct(IDBConnection $connection) {
+		$this->connection = $connection;
+	}
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 */
+	public function preSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
+		// Truncate all tables that will get a new index later
+		$qb = $this->connection->getQueryBuilder();
+		$qb->delete('mail_recipients');
+		$qb->execute();
+
+		// Truncate and change primary key type for messages table
+		$qb1 = $this->connection->getQueryBuilder();
+		$qb1->delete('mail_messages');
+		$qb1->execute();
+
+		// Truncate message_tags table
+		$qb2 = $this->connection->getQueryBuilder();
+		$qb2->delete('mail_message_tags');
+		$qb2->execute();
+
+		// unset all locks for the mailboxes table
+		$qb3 = $this->connection->getQueryBuilder();
+		$qb3->update('mail_mailboxes')
+			->set('sync_new_lock', $qb3->createNamedParameter(null, IQueryBuilder::PARAM_NULL))
+			->set('sync_changed_lock', $qb3->createNamedParameter(null, IQueryBuilder::PARAM_NULL))
+			->set('sync_vanished_lock', $qb3->createNamedParameter(null, IQueryBuilder::PARAM_NULL))
+			->set('sync_new_token', $qb3->createNamedParameter(null, IQueryBuilder::PARAM_NULL))
+			->set('sync_changed_token', $qb3->createNamedParameter(null, IQueryBuilder::PARAM_NULL))
+			->set('sync_vanished_token', $qb3->createNamedParameter(null, IQueryBuilder::PARAM_NULL));
+		$qb3->execute();
+	}
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 * @return null|ISchemaWrapper
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		// Remove old unnamed attachments FK
+		$attachmentsTable = $schema->getTable('mail_attachments');
+		$fks = $attachmentsTable->getForeignKeys();
+		foreach ($fks as $fk) {
+			$attachmentsTable->removeForeignKey($fk->getName());
+		}
+
+		$recipientsTable = $schema->getTable('mail_recipients');
+		$fks = $recipientsTable->getForeignKeys();
+		foreach ($fks as $fk) {
+			$recipientsTable->removeForeignKey($fk->getName());
+		}
+
+		// Change primary column to bigint
+		$recipientsTable->changeColumn('id', [
+			'length' => 20,
+		]);
+
+		// Add new named FKs to attachments and recipients
+		$recipientsTable->addForeignKeyConstraint($schema->getTable('mail_local_messages'), ['local_message_id'], ['id'], ['onDelete' => 'CASCADE'], 'recipient_local_message');
+		$attachmentsTable->addForeignKeyConstraint($schema->getTable('mail_local_messages'), ['local_message_id'], ['id'], ['onDelete' => 'CASCADE'], 'attachment_local_message');
+
+		// Change primary column to bigint
+		$messagesTable = $schema->getTable('mail_messages');
+		$messagesTable->changeColumn('id', [
+			'length' => 20,
+		]);
+
+		// Since we have instances where these indices were set manually, remove them first if they exist
+		$indices = $messagesTable->getIndexes();
+		foreach ($indices as $index) {
+			if (!$index->isPrimary()) {
+				$messagesTable->dropIndex($index->getName());
+			}
+		}
+
+		// Add named indices
+		$messagesTable->addIndex(['mailbox_id', 'flag_important', 'flag_deleted', 'flag_seen'], 'mail_messages_id_flags');
+		$messagesTable->addIndex(['mailbox_id', 'flag_deleted', 'flag_flagged'], 'mail_messages_id_flags2');
+		$messagesTable->addIndex(['mailbox_id'], 'mail_messages_mailbox_id');
+
+		// Postgres doesn't allow for shortened indices, so let's skip the last index.
+		if ($schema->getDatabasePlatform() instanceof PostgreSQL94Platform) {
+			return $schema;
+		}
+
+		$messagesTable->addIndex(['mailbox_id', 'thread_root_id', 'sent_at'], 'mail_msg_thrd_root_snt_idx', [], ['lengths' => [null, 64, null]]);
+
+		return $schema;
+	}
+}