signal-desktop/ts/sql/migrations/86-story-replies-index.ts

// Copyright 2023 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only

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

export default function updateToSchemaVersion86(db: Database): void {
  // The key reason for this new schema is that all of our previous schemas start with
  //   conversationId. This query is meant to find all replies to a given story, no
  //   matter the conversation.
  db.exec(
    `CREATE INDEX messages_story_replies
      ON messages (storyId, received_at, sent_at)
      WHERE isStory IS 0;
    `
  );
}