Add index on the session_id

This is called from time to time as well. Especially on big instances
having this proper indexed saves a lot of row scanning.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

1 files changed, 46 insertions, 0 deletions

diff --git a/lib/Migration/Version8000Date20200407073807.php b/lib/Migration/Version8000Date20200407073807.php
new file mode 100644
index 000000000..284e81ea6
--- /dev/null
+++ b/lib/Migration/Version8000Date20200407073807.php
@@ -0,0 +1,46 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @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\Talk\Migration;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+class Version8000Date20200407073807 extends SimpleMigrationStep {
+
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		$table = $schema->getTable('talk_participants');
+		if (!$table->hasIndex('tp_session_id')) {
+			$table->addIndex(['session_id'], 'tp_session_id');
+		}
+
+		return $schema;
+	}
+}