signal-desktop/ts/sql/migrations/83-mentions.ts

// Copyright 2021 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only

import type { Database } from '@signalapp/sqlcipher';

export default function updateToSchemaVersion83(db: Database): void {
  db.exec(
    `
    ALTER TABLE messages
      ADD COLUMN mentionsMe INTEGER NOT NULL DEFAULT 0;

    -- one which includes story data...
    CREATE INDEX messages_unread_mentions ON messages
      (conversationId, readStatus, mentionsMe, isStory, storyId, received_at, sent_at)
      WHERE readStatus IS NOT NULL;

    -- ...and one which doesn't, so storyPredicate works as expected
    CREATE INDEX messages_unread_mentions_no_story_id ON messages
      (conversationId, readStatus, mentionsMe, isStory, received_at, sent_at)
      WHERE isStory IS 0 AND readStatus IS NOT NULL;
    `
  );
}